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-rw-r--r--[-rwxr-xr-x]lib/posix/posix.nim2968
1 files changed, 851 insertions, 2117 deletions
diff --git a/lib/posix/posix.nim b/lib/posix/posix.nim
index 5c8103b9a..fbe945df3 100755..100644
--- a/lib/posix/posix.nim
+++ b/lib/posix/posix.nim
@@ -1,7 +1,7 @@
 #
 #
-#            Nimrod's Runtime Library
-#        (c) Copyright 2009 Andreas Rumpf
+#            Nim's Runtime Library
+#        (c) Copyright 2012 Andreas Rumpf
 #
 #    See the file "copying.txt", included in this
 #    distribution, for details about the copyright.
@@ -13,48 +13,57 @@
 # net/if, sys/socket, sys/uio, netinet/in, netinet/tcp, netdb
 
 ## This is a raw POSIX interface module. It does not not provide any
-## convenience: cstrings are used instead of proper Nimrod strings and
-## return codes indicate errors. If you want exceptions 
-## and a proper Nimrod-like interface, use the OS module or write a wrapper.
-
+## convenience: cstrings are used instead of proper Nim strings and
+## return codes indicate errors. If you want exceptions
+## and a proper Nim-like interface, use the OS module or write a wrapper.
+##
+## For high-level wrappers specialized for Linux and BSDs see:
+## `posix_utils <posix_utils.html>`_
+##
 ## Coding conventions:
 ## ALL types are named the same as in the POSIX standard except that they start
-## with 'T' or 'P' (if they are pointers) and without the '_t' prefix to be
-## consistent with Nimrod conventions. If an identifier is a Nimrod keyword
+## with 'T' or 'P' (if they are pointers) and without the '_t' suffix to be
+## consistent with Nim conventions. If an identifier is a Nim keyword
 ## the \`identifier\` notation is used.
 ##
-## This library relies on the header files of your C compiler. Thus the
-## resulting C code will just include <XYZ.h> and *not* define the
+## This library relies on the header files of your C compiler. The
+## resulting C code will just `#include <XYZ.h>` and *not* define the
 ## symbols declared here.
 
-from times import TTime
+# Dead code elimination ensures that we don't accidentally generate #includes
+# for files that might not exist on a specific platform! The user will get an
+# error only if they actually try to use the missing declaration
 
-const
-  hasSpawnH = defined(linux)
-  hasAioH = defined(linux)
+when defined(nimHasStyleChecks):
+  {.push styleChecks: off.}
+
+when defined(nimPreviewSlimSystem):
+  import std/syncio
 
+# TODO these constants don't seem to be fetched from a header file for unknown
+#      platforms - where do they come from and why are they here?
 when false:
   const
-    C_IRUSR = 0c000400 ## Read by owner.
-    C_IWUSR = 0c000200 ## Write by owner.
-    C_IXUSR = 0c000100 ## Execute by owner.
-    C_IRGRP = 0c000040 ## Read by group.
-    C_IWGRP = 0c000020 ## Write by group.
-    C_IXGRP = 0c000010 ## Execute by group.
-    C_IROTH = 0c000004 ## Read by others.
-    C_IWOTH = 0c000002 ## Write by others.
-    C_IXOTH = 0c000001 ## Execute by others.
-    C_ISUID = 0c004000 ## Set user ID.
-    C_ISGID = 0c002000 ## Set group ID.
-    C_ISVTX = 0c001000 ## On directories, restricted deletion flag.
-    C_ISDIR = 0c040000 ## Directory.
-    C_ISFIFO = 0c010000 ##FIFO.
-    C_ISREG = 0c100000 ## Regular file.
-    C_ISBLK = 0c060000 ## Block special.
-    C_ISCHR = 0c020000 ## Character special.
-    C_ISCTG = 0c110000 ## Reserved.
-    C_ISLNK = 0c120000 ## Symbolic link.</p>
-    C_ISSOCK = 0c140000 ## Socket.
+    C_IRUSR = 0o000400 ## Read by owner.
+    C_IWUSR = 0o000200 ## Write by owner.
+    C_IXUSR = 0o000100 ## Execute by owner.
+    C_IRGRP = 0o000040 ## Read by group.
+    C_IWGRP = 0o000020 ## Write by group.
+    C_IXGRP = 0o000010 ## Execute by group.
+    C_IROTH = 0o000004 ## Read by others.
+    C_IWOTH = 0o000002 ## Write by others.
+    C_IXOTH = 0o000001 ## Execute by others.
+    C_ISUID = 0o004000 ## Set user ID.
+    C_ISGID = 0o002000 ## Set group ID.
+    C_ISVTX = 0o001000 ## On directories, restricted deletion flag.
+    C_ISDIR = 0o040000 ## Directory.
+    C_ISFIFO = 0o010000 ##FIFO.
+    C_ISREG = 0o100000 ## Regular file.
+    C_ISBLK = 0o060000 ## Block special.
+    C_ISCHR = 0o020000 ## Character special.
+    C_ISCTG = 0o110000 ## Reserved.
+    C_ISLNK = 0o120000 ## Symbolic link.</p>
+    C_ISSOCK = 0o140000 ## Socket.
 
 const
   MM_NULLLBL* = nil
@@ -63,1605 +72,69 @@ const
   MM_NULLTXT* = nil
   MM_NULLACT* = nil
   MM_NULLTAG* = nil
-  
+
   STDERR_FILENO* = 2 ## File number of stderr;
   STDIN_FILENO* = 0  ## File number of stdin;
-  STDOUT_FILENO* = 1 ## File number of stdout; 
-
-type
-  TDIR* {.importc: "DIR", header: "<dirent.h>", final, pure.} = object
-    ## A type representing a directory stream. 
-
-  Tdirent* {.importc: "struct dirent", 
-             header: "<dirent.h>", final, pure.} = object ## dirent_t struct
-    d_ino*: TIno  ## File serial number.
-    d_name*: array [0..255, char] ## Name of entry.
-
-  Tflock* {.importc: "flock", final, pure,
-            header: "<fcntl.h>".} = object ## flock type
-    l_type*: cshort   ## Type of lock; F_RDLCK, F_WRLCK, F_UNLCK. 
-    l_whence*: cshort ## Flag for starting offset. 
-    l_start*: Toff    ## Relative offset in bytes. 
-    l_len*: Toff      ## Size; if 0 then until EOF. 
-    l_pid*: TPid      ## Process ID of the process holding the lock; 
-                      ## returned with F_GETLK. 
-  
-  Tfenv* {.importc: "fenv_t", header: "<fenv.h>", final, pure.} = 
-    object ## Represents the entire floating-point environment. The
-           ## floating-point environment refers collectively to any
-           ## floating-point status flags and control modes supported
-           ## by the implementation.
-  Tfexcept* {.importc: "fexcept_t", header: "<fenv.h>", final, pure.} = 
-    object ## Represents the floating-point status flags collectively, 
-           ## including any status the implementation associates with the 
-           ## flags. A floating-point status flag is a system variable 
-           ## whose value is set (but never cleared) when a floating-point
-           ## exception is raised, which occurs as a side effect of
-           ## exceptional floating-point arithmetic to provide auxiliary
-           ## information. A floating-point control mode is a system variable
-           ## whose value may be set by the user to affect the subsequent 
-           ## behavior of floating-point arithmetic.
-
-  TFTW* {.importc: "struct FTW", header: "<ftw.h>", final, pure.} = object
-    base*: cint
-    level*: cint
-    
-  TGlob* {.importc: "glob_t", header: "<glob.h>", 
-           final, pure.} = object ## glob_t
-    gl_pathc*: int          ## Count of paths matched by pattern. 
-    gl_pathv*: cstringArray ## Pointer to a list of matched pathnames. 
-    gl_offs*: int           ## Slots to reserve at the beginning of gl_pathv. 
-  
-  TGroup* {.importc: "struct group", header: "<grp.h>", 
-            final, pure.} = object ## struct group
-    gr_name*: cstring     ## The name of the group. 
-    gr_gid*: TGid         ## Numerical group ID. 
-    gr_mem*: cstringArray ## Pointer to a null-terminated array of character 
-                          ## pointers to member names. 
-
-  Ticonv* {.importc: "iconv_t", header: "<iconv.h>", final, pure.} = 
-    object ## Identifies the conversion from one codeset to another.
-
-  Tlconv* {.importc: "struct lconv", header: "<locale.h>", final, pure.} = object
-    currency_symbol*: cstring
-    decimal_point*: cstring
-    frac_digits*: char
-    grouping*: cstring
-    int_curr_symbol*: cstring
-    int_frac_digits*: char
-    int_n_cs_precedes*: char
-    int_n_sep_by_space*: char
-    int_n_sign_posn*: char
-    int_p_cs_precedes*: char
-    int_p_sep_by_space*: char
-    int_p_sign_posn*: char
-    mon_decimal_point*: cstring
-    mon_grouping*: cstring
-    mon_thousands_sep*: cstring
-    negative_sign*: cstring
-    n_cs_precedes*: char
-    n_sep_by_space*: char
-    n_sign_posn*: char
-    positive_sign*: cstring
-    p_cs_precedes*: char
-    p_sep_by_space*: char
-    p_sign_posn*: char
-    thousands_sep*: cstring
-
-  TMqd* {.importc: "mqd_t", header: "<mqueue.h>", final, pure.} = object
-  TMqAttr* {.importc: "struct mq_attr", 
-             header: "<mqueue.h>", 
-             final, pure.} = object ## message queue attribute
-    mq_flags*: int   ## Message queue flags. 
-    mq_maxmsg*: int  ## Maximum number of messages. 
-    mq_msgsize*: int ## Maximum message size. 
-    mq_curmsgs*: int ## Number of messages currently queued. 
-
-  TPasswd* {.importc: "struct passwd", header: "<pwd.h>", 
-             final, pure.} = object ## struct passwd
-    pw_name*: cstring   ## User's login name. 
-    pw_uid*: TUid       ## Numerical user ID. 
-    pw_gid*: TGid       ## Numerical group ID. 
-    pw_dir*: cstring    ## Initial working directory. 
-    pw_shell*: cstring  ## Program to use as shell. 
-
-  Tblkcnt* {.importc: "blkcnt_t", header: "<sys/types.h>".} = int
-    ## used for file block counts
-  Tblksize* {.importc: "blksize_t", header: "<sys/types.h>".} = int
-    ## used for block sizes
-  TClock* {.importc: "clock_t", header: "<sys/types.h>".} = int
-  TClockId* {.importc: "clockid_t", header: "<sys/types.h>".} = int
-  TDev* {.importc: "dev_t", header: "<sys/types.h>".} = int
-  Tfsblkcnt* {.importc: "fsblkcnt_t", header: "<sys/types.h>".} = int
-  Tfsfilcnt* {.importc: "fsfilcnt_t", header: "<sys/types.h>".} = int
-  TGid* {.importc: "gid_t", header: "<sys/types.h>".} = int
-  Tid* {.importc: "id_t", header: "<sys/types.h>".} = int
-  Tino* {.importc: "ino_t", header: "<sys/types.h>".} = int
-  TKey* {.importc: "key_t", header: "<sys/types.h>".} = int
-  TMode* {.importc: "mode_t", header: "<sys/types.h>".} = int
-  TNlink* {.importc: "nlink_t", header: "<sys/types.h>".} = int
-  TOff* {.importc: "off_t", header: "<sys/types.h>".} = int64
-  TPid* {.importc: "pid_t", header: "<sys/types.h>".} = int
-  Tpthread_attr* {.importc: "pthread_attr_t", header: "<sys/types.h>".} = int
-  Tpthread_barrier* {.importc: "pthread_barrier_t", 
-                      header: "<sys/types.h>".} = int
-  Tpthread_barrierattr* {.importc: "pthread_barrierattr_t", 
-                          header: "<sys/types.h>".} = int
-  Tpthread_cond* {.importc: "pthread_cond_t", header: "<sys/types.h>".} = int
-  Tpthread_condattr* {.importc: "pthread_condattr_t", 
-                       header: "<sys/types.h>".} = int
-  Tpthread_key* {.importc: "pthread_key_t", header: "<sys/types.h>".} = int
-  Tpthread_mutex* {.importc: "pthread_mutex_t", header: "<sys/types.h>".} = int
-  Tpthread_mutexattr* {.importc: "pthread_mutexattr_t", 
-                        header: "<sys/types.h>".} = int
-  Tpthread_once* {.importc: "pthread_once_t", header: "<sys/types.h>".} = int
-  Tpthread_rwlock* {.importc: "pthread_rwlock_t", header: "<sys/types.h>".} = int
-  Tpthread_rwlockattr* {.importc: "pthread_rwlockattr_t", 
-                         header: "<sys/types.h>".} = int
-  Tpthread_spinlock* {.importc: "pthread_spinlock_t", 
-                       header: "<sys/types.h>".} = int
-  Tpthread* {.importc: "pthread_t", header: "<sys/types.h>".} = int
-  Tsuseconds* {.importc: "suseconds_t", header: "<sys/types.h>".} = int
-  #Ttime* {.importc: "time_t", header: "<sys/types.h>".} = int
-  Ttimer* {.importc: "timer_t", header: "<sys/types.h>".} = int
-  Ttrace_attr* {.importc: "trace_attr_t", header: "<sys/types.h>".} = int
-  Ttrace_event_id* {.importc: "trace_event_id_t", 
-                     header: "<sys/types.h>".} = int
-  Ttrace_event_set* {.importc: "trace_event_set_t", 
-                      header: "<sys/types.h>".} = int
-  Ttrace_id* {.importc: "trace_id_t", header: "<sys/types.h>".} = int
-  Tuid* {.importc: "uid_t", header: "<sys/types.h>".} = int
-  Tuseconds* {.importc: "useconds_t", header: "<sys/types.h>".} = int
-  
-  Tutsname* {.importc: "struct utsname", 
-              header: "<sys/utsname.h>", 
-              final, pure.} = object ## struct utsname
-    sysname*,      ## Name of this implementation of the operating system. 
-      nodename*,   ## Name of this node within the communications 
-                   ## network to which this node is attached, if any. 
-      release*,    ## Current release level of this implementation. 
-      version*,    ## Current version level of this release. 
-      machine*: array [0..255, char] ## Name of the hardware type on which the
-                                     ## system is running. 
-
-  TSem* {.importc: "sem_t", header: "<semaphore.h>", final, pure.} = object
-  Tipc_perm* {.importc: "struct ipc_perm", 
-               header: "<sys/ipc.h>", final, pure.} = object ## struct ipc_perm
-    uid*: tuid    ## Owner's user ID. 
-    gid*: tgid    ## Owner's group ID. 
-    cuid*: Tuid   ## Creator's user ID. 
-    cgid*: Tgid   ## Creator's group ID. 
-    mode*: TMode  ## Read/write permission. 
-  
-  TStat* {.importc: "struct stat", 
-           header: "<sys/stat.h>", final, pure.} = object ## struct stat
-    st_dev*: TDev          ## Device ID of device containing file. 
-    st_ino*: TIno          ## File serial number. 
-    st_mode*: TMode        ## Mode of file (see below). 
-    st_nlink*: tnlink      ## Number of hard links to the file. 
-    st_uid*: tuid          ## User ID of file. 
-    st_gid*: Tgid          ## Group ID of file. 
-    st_rdev*: TDev         ## Device ID (if file is character or block special). 
-    st_size*: TOff         ## For regular files, the file size in bytes. 
-                           ## For symbolic links, the length in bytes of the 
-                           ## pathname contained in the symbolic link. 
-                           ## For a shared memory object, the length in bytes. 
-                           ## For a typed memory object, the length in bytes. 
-                           ## For other file types, the use of this field is 
-                           ## unspecified. 
-    st_atime*: ttime       ## Time of last access. 
-    st_mtime*: ttime       ## Time of last data modification. 
-    st_ctime*: ttime       ## Time of last status change. 
-    st_blksize*: Tblksize  ## A file system-specific preferred I/O block size  
-                           ## for this object. In some file system types, this 
-                           ## may vary from file to file. 
-    st_blocks*: Tblkcnt    ## Number of blocks allocated for this object. 
-
-  
-  TStatvfs* {.importc: "struct statvfs", header: "<sys/statvfs.h>", 
-              final, pure.} = object ## struct statvfs
-    f_bsize*: int        ## File system block size. 
-    f_frsize*: int       ## Fundamental file system block size. 
-    f_blocks*: Tfsblkcnt ## Total number of blocks on file system
-                         ## in units of f_frsize. 
-    f_bfree*: Tfsblkcnt  ## Total number of free blocks. 
-    f_bavail*: Tfsblkcnt ## Number of free blocks available to 
-                         ## non-privileged process. 
-    f_files*: Tfsfilcnt  ## Total number of file serial numbers. 
-    f_ffree*: Tfsfilcnt  ## Total number of free file serial numbers. 
-    f_favail*: Tfsfilcnt ## Number of file serial numbers available to 
-                         ## non-privileged process. 
-    f_fsid*: int         ## File system ID. 
-    f_flag*: int         ## Bit mask of f_flag values. 
-    f_namemax*: int      ## Maximum filename length. 
-
-  Tposix_typed_mem_info* {.importc: "struct posix_typed_mem_info", 
-                           header: "<sys/mman.h>", final, pure.} = object
-    posix_tmi_length*: int
-  
-  Ttm* {.importc: "struct tm", header: "<time.h>", 
-         final, pure.} = object ## struct tm
-    tm_sec*: cint   ## Seconds [0,60]. 
-    tm_min*: cint   ## Minutes [0,59]. 
-    tm_hour*: cint  ## Hour [0,23]. 
-    tm_mday*: cint  ## Day of month [1,31]. 
-    tm_mon*: cint   ## Month of year [0,11]. 
-    tm_year*: cint  ## Years since 1900. 
-    tm_wday*: cint  ## Day of week [0,6] (Sunday =0). 
-    tm_yday*: cint  ## Day of year [0,365]. 
-    tm_isdst*: cint ## Daylight Savings flag. 
-  Ttimespec* {.importc: "struct timespec", 
-               header: "<time.h>", final, pure.} = object ## struct timespec
-    tv_sec*: Ttime ## Seconds. 
-    tv_nsec*: int  ## Nanoseconds. 
-  titimerspec* {.importc: "struct itimerspec", header: "<time.h>", 
-                 final, pure.} = object ## struct itimerspec
-    it_interval*: ttimespec ## Timer period. 
-    it_value*: ttimespec    ## Timer expiration. 
-  
-  Tsig_atomic* {.importc: "sig_atomic_t", header: "<signal.h>".} = cint
-    ## Possibly volatile-qualified integer type of an object that can be 
-    ## accessed as an atomic entity, even in the presence of asynchronous
-    ## interrupts.
-  Tsigset* {.importc: "sigset_t", header: "<signal.h>", final, pure.} = object
-  
-  TsigEvent* {.importc: "struct sigevent", 
-               header: "<signal.h>", final, pure.} = object ## struct sigevent
-    sigev_notify*: cint           ## Notification type. 
-    sigev_signo*: cint            ## Signal number. 
-    sigev_value*: Tsigval         ## Signal value. 
-    sigev_notify_function*: proc (x: TSigval) {.noconv.} ## Notification function. 
-    sigev_notify_attributes*: ptr Tpthreadattr ## Notification attributes.
-
-  TsigVal* {.importc: "union sigval", 
-             header: "<signal.h>", final, pure.} = object ## struct sigval
-    sival_ptr*: pointer ## pointer signal value; 
-                        ## integer signal value not defined!
-  TSigaction* {.importc: "struct sigaction", 
-                header: "<signal.h>", final, pure.} = object ## struct sigaction
-    sa_handler*: proc (x: cint) {.noconv.}  ## Pointer to a signal-catching
-                                            ## function or one of the macros 
-                                            ## SIG_IGN or SIG_DFL. 
-    sa_mask*: TsigSet ## Set of signals to be blocked during execution of 
-                      ## the signal handling function. 
-    sa_flags*: cint   ## Special flags. 
-    sa_sigaction*: proc (x: cint, y: var TSigInfo, z: pointer) {.noconv.}
-
-  TStack* {.importc: "stack_t",
-            header: "<signal.h>", final, pure.} = object ## stack_t
-    ss_sp*: pointer  ## Stack base or pointer. 
-    ss_size*: int    ## Stack size. 
-    ss_flags*: cint  ## Flags. 
-
-  TSigStack* {.importc: "struct sigstack", 
-               header: "<signal.h>", final, pure.} = object ## struct sigstack
-    ss_onstack*: cint ## Non-zero when signal stack is in use. 
-    ss_sp*: pointer   ## Signal stack pointer. 
-
-  TsigInfo* {.importc: "siginfo_t", 
-              header: "<signal.h>", final, pure.} = object ## siginfo_t
-    si_signo*: cint    ## Signal number. 
-    si_code*: cint     ## Signal code. 
-    si_errno*: cint    ## If non-zero, an errno value associated with 
-                       ## this signal, as defined in <errno.h>. 
-    si_pid*: tpid      ## Sending process ID. 
-    si_uid*: tuid      ## Real user ID of sending process. 
-    si_addr*: pointer  ## Address of faulting instruction. 
-    si_status*: cint   ## Exit value or signal. 
-    si_band*: int      ## Band event for SIGPOLL. 
-    si_value*: TSigval ## Signal value. 
-  
-  Tnl_item* {.importc: "nl_item", header: "<nl_types.h>".} = cint
-  Tnl_catd* {.importc: "nl_catd", header: "<nl_types.h>".} = cint
-
-  Tsched_param* {.importc: "struct sched_param", 
-                  header: "<sched.h>", 
-                  final, pure.} = object ## struct sched_param
-    sched_priority*: cint
-    sched_ss_low_priority*: cint     ## Low scheduling priority for 
-                                     ## sporadic server. 
-    sched_ss_repl_period*: ttimespec ## Replenishment period for 
-                                     ## sporadic server. 
-    sched_ss_init_budget*: ttimespec ## Initial budget for sporadic server. 
-    sched_ss_max_repl*: cint         ## Maximum pending replenishments for 
-                                     ## sporadic server. 
-
-  Ttimeval* {.importc: "struct timeval", header: "<sys/select.h>", 
-              final, pure.} = object ## struct timeval
-    tv_sec*: ttime       ## Seconds. 
-    tv_usec*: tsuseconds ## Microseconds. 
-  Tfd_set* {.importc: "struct fd_set", header: "<sys/select.h>", 
-             final, pure.} = object
-  Tmcontext* {.importc: "mcontext_t", header: "<ucontext.h>", 
-               final, pure.} = object
-  Tucontext* {.importc: "ucontext_t", header: "<ucontext.h>", 
-               final, pure.} = object ## ucontext_t
-    uc_link*: ptr Tucontext ## Pointer to the context that is resumed 
-                            ## when this context returns. 
-    uc_sigmask*: Tsigset    ## The set of signals that are blocked when this 
-                            ## context is active. 
-    uc_stack*: TStack       ## The stack used by this context. 
-    uc_mcontext*: Tmcontext ## A machine-specific representation of the saved 
-                            ## context. 
-
-when hasAioH:
-  type
-    Taiocb* {.importc: "struct aiocb", header: "<aio.h>", 
-              final, pure.} = object ## struct aiocb
-      aio_fildes*: cint         ## File descriptor. 
-      aio_offset*: TOff         ## File offset. 
-      aio_buf*: pointer         ## Location of buffer. 
-      aio_nbytes*: int          ## Length of transfer. 
-      aio_reqprio*: cint        ## Request priority offset. 
-      aio_sigevent*: TSigEvent  ## Signal number and value. 
-      aio_lio_opcode: cint      ## Operation to be performed. 
- 
-when hasSpawnH:
-  type
-    Tposix_spawnattr* {.importc: "posix_spawnattr_t", 
-                        header: "<spawn.h>".} = cint
-    Tposix_spawn_file_actions* {.importc: "posix_spawn_file_actions_t", 
-                                 header: "<spawn.h>".} = cint 
-
-type
-  TSocklen* {.importc: "socklen_t", header: "<sys/socket.h>".} = cint
-  TSa_Family* {.importc: "sa_family_t", header: "<sys/socket.h>".} = cint
-  
-  TSockAddr* {.importc: "struct sockaddr", header: "<sys/socket.h>", 
-               pure, final.} = object ## struct sockaddr
-    sa_family*: Tsa_family         ## Address family. 
-    sa_data*: array [0..255, char] ## Socket address (variable-length data). 
-  
-  Tsockaddr_storage* {.importc: "struct sockaddr_storage",
-                       header: "<sys/socket.h>", 
-                       pure, final.} = object ## struct sockaddr_storage
-    ss_family*: Tsa_family ## Address family. 
-
-  Tif_nameindex* {.importc: "struct if_nameindex", final, 
-                   pure, header: "<net/if.h>".} = object ## struct if_nameindex
-    if_index*: cint   ## Numeric index of the interface. 
-    if_name*: cstring ## Null-terminated name of the interface. 
-
-
-  TIOVec* {.importc: "struct iovec", pure, final,
-            header: "<sys/uio.h>".} = object ## struct iovec
-    iov_base*: pointer ## Base address of a memory region for input or output. 
-    iov_len*: int    ## The size of the memory pointed to by iov_base. 
-    
-  Tmsghdr* {.importc: "struct msghdr", pure, final,
-             header: "<sys/socket.h>".} = object  ## struct msghdr
-    msg_name*: pointer  ## Optional address. 
-    msg_namelen*: TSockLen  ## Size of address. 
-    msg_iov*: ptr TIOVec    ## Scatter/gather array. 
-    msg_iovlen*: cint   ## Members in msg_iov. 
-    msg_control*: pointer  ## Ancillary data; see below. 
-    msg_controllen*: TSockLen ## Ancillary data buffer len. 
-    msg_flags*: cint ## Flags on received message. 
-
-
-  Tcmsghdr* {.importc: "struct cmsghdr", pure, final, 
-              header: "<sys/socket.h>".} = object ## struct cmsghdr
-    cmsg_len*: TSockLen ## Data byte count, including the cmsghdr. 
-    cmsg_level*: cint   ## Originating protocol. 
-    cmsg_type*: cint    ## Protocol-specific type. 
-
-  TLinger* {.importc: "struct linger", pure, final, 
-             header: "<sys/socket.h>".} = object ## struct linger
-    l_onoff*: cint  ## Indicates whether linger option is enabled. 
-    l_linger*: cint ## Linger time, in seconds. 
-  
-  TInPort* = int16 ## unsigned!
-  TInAddrScalar* = int32 ## unsigned!
-  
-  TInAddr* {.importc: "struct in_addr", pure, final, 
-             header: "<netinet/in.h>".} = object ## struct in_addr
-    s_addr*: TInAddrScalar
-
-  Tsockaddr_in* {.importc: "struct sockaddr_in", pure, final, 
-                  header: "<netinet/in.h>".} = object ## struct sockaddr_in
-    sin_family*: TSa_family ## AF_INET. 
-    sin_port*: TInPort      ## Port number. 
-    sin_addr*: TInAddr      ## IP address. 
-
-  TIn6Addr* {.importc: "struct in6_addr", pure, final,
-              header: "<netinet/in.h>".} = object ## struct in6_addr
-    s6_addr*: array [0..15, char]
-
-  Tsockaddr_in6* {.importc: "struct sockaddr_in6", pure, final,
-                   header: "<netinet/in.h>".} = object ## struct sockaddr_in6
-    sin6_family*: TSa_family ## AF_INET6. 
-    sin6_port*: TInPort      ## Port number. 
-    sin6_flowinfo*: int32    ## IPv6 traffic class and flow information. 
-    sin6_addr*: Tin6Addr     ## IPv6 address. 
-    sin6_scope_id*: int32    ## Set of interfaces for a scope. 
-  
-  Tipv6_mreq* {.importc: "struct ipv6_mreq", pure, final, 
-                header: "<netinet/in.h>".} = object ## struct ipv6_mreq
-    ipv6mr_multiaddr*: TIn6Addr ## IPv6 multicast address. 
-    ipv6mr_interface*: cint     ## Interface index. 
-
-  Thostent* {.importc: "struct hostent", pure, final, 
-              header: "<netdb.h>".} = object ## struct hostent
-    h_name*: cstring           ## Official name of the host. 
-    h_aliases*: cstringArray   ## A pointer to an array of pointers to 
-                               ## alternative host names, terminated by a 
-                               ## null pointer. 
-    h_addrtype*: cint          ## Address type. 
-    h_length*: cint            ## The length, in bytes, of the address. 
-    h_addr_list*: cstringArray ## A pointer to an array of pointers to network 
-                               ## addresses (in network byte order) for the
-                               ## host, terminated by a null pointer. 
-
-  Tnetent* {.importc: "struct netent", pure, final, 
-              header: "<netdb.h>".} = object ## struct netent
-    n_name*: cstring         ## Official, fully-qualified (including the 
-                             ## domain) name of the host. 
-    n_aliases*: cstringArray ## A pointer to an array of pointers to 
-                             ## alternative network names, terminated by a 
-                             ## null pointer. 
-    n_addrtype*: cint        ## The address type of the network. 
-    n_net*: int32            ## The network number, in host byte order. 
-
-  TProtoent* {.importc: "struct protoent", pure, final, 
-              header: "<netdb.h>".} = object ## struct protoent
-    p_name*: cstring         ## Official name of the protocol. 
-    p_aliases*: cstringArray ## A pointer to an array of pointers to 
-                             ## alternative protocol names, terminated by 
-                             ## a null pointer. 
-    p_proto*: cint           ## The protocol number. 
-
-  TServent* {.importc: "struct servent", pure, final, 
-              header: "<netdb.h>".} = object ## struct servent
-    s_name*: cstring         ## Official name of the service. 
-    s_aliases*: cstringArray ## A pointer to an array of pointers to 
-                             ## alternative service names, terminated by 
-                             ## a null pointer. 
-    s_port*: cint            ## The port number at which the service 
-                             ## resides, in network byte order. 
-    s_proto*: cstring        ## The name of the protocol to use when 
-                             ## contacting the service. 
-
-  Taddrinfo* {.importc: "struct addrinfo", pure, final, 
-              header: "<netdb.h>".} = object ## struct addrinfo
-    ai_flags*: cint         ## Input flags. 
-    ai_family*: cint        ## Address family of socket. 
-    ai_socktype*: cint      ## Socket type. 
-    ai_protocol*: cint      ## Protocol of socket. 
-    ai_addrlen*: TSockLen   ## Length of socket address. 
-    ai_addr*: ptr TSockAddr ## Socket address of socket. 
-    ai_canonname*: cstring  ## Canonical name of service location. 
-    ai_next*: ptr TAddrInfo ## Pointer to next in list. 
-  
-  TPollfd* {.importc: "struct pollfd", pure, final, 
-             header: "<poll.h>".} = object ## struct pollfd
-    fd*: cint        ## The following descriptor being polled. 
-    events*: cshort  ## The input event flags (see below). 
-    revents*: cshort ## The output event flags (see below).  
-  
-  Tnfds* {.importc: "nfds_t", header: "<poll.h>".} = cint
-
-var
-  errno* {.importc, header: "<errno.h>".}: cint ## error variable
-  daylight* {.importc, header: "<time.h>".}: cint
-  timezone* {.importc, header: "<time.h>".}: int
-  
-# Constants as variables:
-when hasAioH:
-  var
-    AIO_ALLDONE* {.importc, header: "<aio.h>".}: cint
-      ## A return value indicating that none of the requested operations 
-      ## could be canceled since they are already complete.
-    AIO_CANCELED* {.importc, header: "<aio.h>".}: cint
-      ## A return value indicating that all requested operations have
-      ## been canceled.
-    AIO_NOTCANCELED* {.importc, header: "<aio.h>".}: cint
-      ## A return value indicating that some of the requested operations could 
-      ## not be canceled since they are in progress.
-    LIO_NOP* {.importc, header: "<aio.h>".}: cint
-      ## A lio_listio() element operation option indicating that no transfer is
-      ## requested.
-    LIO_NOWAIT* {.importc, header: "<aio.h>".}: cint
-      ## A lio_listio() synchronization operation indicating that the calling 
-      ## thread is to continue execution while the lio_listio() operation is 
-      ## being performed, and no notification is given when the operation is
-      ## complete.
-    LIO_READ* {.importc, header: "<aio.h>".}: cint
-      ## A lio_listio() element operation option requesting a read.
-    LIO_WAIT* {.importc, header: "<aio.h>".}: cint
-      ## A lio_listio() synchronization operation indicating that the calling 
-      ## thread is to suspend until the lio_listio() operation is complete.
-    LIO_WRITE* {.importc, header: "<aio.h>".}: cint
-      ## A lio_listio() element operation option requesting a write.
-
-var
-  RTLD_LAZY* {.importc, header: "<dlfcn.h>".}: cint
-    ## Relocations are performed at an implementation-defined time.
-  RTLD_NOW* {.importc, header: "<dlfcn.h>".}: cint
-    ## Relocations are performed when the object is loaded.
-  RTLD_GLOBAL* {.importc, header: "<dlfcn.h>".}: cint
-    ## All symbols are available for relocation processing of other modules.
-  RTLD_LOCAL* {.importc, header: "<dlfcn.h>".}: cint
-    ## All symbols are not made available for relocation processing by 
-    ## other modules. 
-    
-  E2BIG* {.importc, header: "<errno.h>".}: cint
-      ## Argument list too long.
-  EACCES* {.importc, header: "<errno.h>".}: cint
-      ## Permission denied.
-  EADDRINUSE* {.importc, header: "<errno.h>".}: cint
-      ## Address in use.
-  EADDRNOTAVAIL* {.importc, header: "<errno.h>".}: cint
-      ## Address not available.
-  EAFNOSUPPORT* {.importc, header: "<errno.h>".}: cint
-      ## Address family not supported.
-  EAGAIN* {.importc, header: "<errno.h>".}: cint
-      ## Resource unavailable, try again (may be the same value as [EWOULDBLOCK]).
-  EALREADY* {.importc, header: "<errno.h>".}: cint
-      ## Connection already in progress.
-  EBADF* {.importc, header: "<errno.h>".}: cint
-      ## Bad file descriptor.
-  EBADMSG* {.importc, header: "<errno.h>".}: cint
-      ## Bad message.
-  EBUSY* {.importc, header: "<errno.h>".}: cint
-      ## Device or resource busy.
-  ECANCELED* {.importc, header: "<errno.h>".}: cint
-      ## Operation canceled.
-  ECHILD* {.importc, header: "<errno.h>".}: cint
-      ## No child processes.
-  ECONNABORTED* {.importc, header: "<errno.h>".}: cint
-      ## Connection aborted.
-  ECONNREFUSED* {.importc, header: "<errno.h>".}: cint
-      ## Connection refused.
-  ECONNRESET* {.importc, header: "<errno.h>".}: cint
-      ## Connection reset.
-  EDEADLK* {.importc, header: "<errno.h>".}: cint
-      ## Resource deadlock would occur.
-  EDESTADDRREQ* {.importc, header: "<errno.h>".}: cint
-      ## Destination address required.
-  EDOM* {.importc, header: "<errno.h>".}: cint
-      ## Mathematics argument out of domain of function.
-  EDQUOT* {.importc, header: "<errno.h>".}: cint
-      ## Reserved.
-  EEXIST* {.importc, header: "<errno.h>".}: cint
-      ## File exists.
-  EFAULT* {.importc, header: "<errno.h>".}: cint
-      ## Bad address.
-  EFBIG* {.importc, header: "<errno.h>".}: cint
-      ## File too large.
-  EHOSTUNREACH* {.importc, header: "<errno.h>".}: cint
-      ## Host is unreachable.
-  EIDRM* {.importc, header: "<errno.h>".}: cint
-      ## Identifier removed.
-  EILSEQ* {.importc, header: "<errno.h>".}: cint
-      ## Illegal byte sequence.
-  EINPROGRESS* {.importc, header: "<errno.h>".}: cint
-      ## Operation in progress.
-  EINTR* {.importc, header: "<errno.h>".}: cint
-      ## Interrupted function.
-  EINVAL* {.importc, header: "<errno.h>".}: cint
-      ## Invalid argument.
-  EIO* {.importc, header: "<errno.h>".}: cint
-      ## I/O error.
-  EISCONN* {.importc, header: "<errno.h>".}: cint
-      ## Socket is connected.
-  EISDIR* {.importc, header: "<errno.h>".}: cint
-      ## Is a directory.
-  ELOOP* {.importc, header: "<errno.h>".}: cint
-      ## Too many levels of symbolic links.
-  EMFILE* {.importc, header: "<errno.h>".}: cint
-      ## Too many open files.
-  EMLINK* {.importc, header: "<errno.h>".}: cint
-      ## Too many links.
-  EMSGSIZE* {.importc, header: "<errno.h>".}: cint
-      ## Message too large.
-  EMULTIHOP* {.importc, header: "<errno.h>".}: cint
-      ## Reserved.
-  ENAMETOOLONG* {.importc, header: "<errno.h>".}: cint
-      ## Filename too long.
-  ENETDOWN* {.importc, header: "<errno.h>".}: cint
-      ## Network is down.
-  ENETRESET* {.importc, header: "<errno.h>".}: cint
-      ## Connection aborted by network.
-  ENETUNREACH* {.importc, header: "<errno.h>".}: cint
-      ## Network unreachable.
-  ENFILE* {.importc, header: "<errno.h>".}: cint
-      ## Too many files open in system.
-  ENOBUFS* {.importc, header: "<errno.h>".}: cint
-      ## No buffer space available.
-  ENODATA* {.importc, header: "<errno.h>".}: cint
-      ## No message is available on the STREAM head read queue.
-  ENODEV* {.importc, header: "<errno.h>".}: cint
-      ## No such device.
-  ENOENT* {.importc, header: "<errno.h>".}: cint
-      ## No such file or directory.
-  ENOEXEC* {.importc, header: "<errno.h>".}: cint
-      ## Executable file format error.
-  ENOLCK* {.importc, header: "<errno.h>".}: cint
-      ## No locks available.
-  ENOLINK* {.importc, header: "<errno.h>".}: cint
-      ## Reserved.
-  ENOMEM* {.importc, header: "<errno.h>".}: cint
-      ## Not enough space.
-  ENOMSG* {.importc, header: "<errno.h>".}: cint
-      ## No message of the desired type.
-  ENOPROTOOPT* {.importc, header: "<errno.h>".}: cint
-      ## Protocol not available.
-  ENOSPC* {.importc, header: "<errno.h>".}: cint
-      ## No space left on device.
-  ENOSR* {.importc, header: "<errno.h>".}: cint
-      ## No STREAM resources.
-  ENOSTR* {.importc, header: "<errno.h>".}: cint
-      ## Not a STREAM.
-  ENOSYS* {.importc, header: "<errno.h>".}: cint
-      ## Function not supported.
-  ENOTCONN* {.importc, header: "<errno.h>".}: cint
-      ## The socket is not connected.
-  ENOTDIR* {.importc, header: "<errno.h>".}: cint
-      ## Not a directory.
-  ENOTEMPTY* {.importc, header: "<errno.h>".}: cint
-      ## Directory not empty.
-  ENOTSOCK* {.importc, header: "<errno.h>".}: cint
-      ## Not a socket.
-  ENOTSUP* {.importc, header: "<errno.h>".}: cint
-      ## Not supported.
-  ENOTTY* {.importc, header: "<errno.h>".}: cint
-      ## Inappropriate I/O control operation.
-  ENXIO* {.importc, header: "<errno.h>".}: cint
-      ## No such device or address.
-  EOPNOTSUPP* {.importc, header: "<errno.h>".}: cint
-      ## Operation not supported on socket.
-  EOVERFLOW* {.importc, header: "<errno.h>".}: cint
-      ## Value too large to be stored in data type.
-  EPERM* {.importc, header: "<errno.h>".}: cint
-      ## Operation not permitted.
-  EPIPE* {.importc, header: "<errno.h>".}: cint
-      ## Broken pipe.
-  EPROTO* {.importc, header: "<errno.h>".}: cint
-      ## Protocol error.
-  EPROTONOSUPPORT* {.importc, header: "<errno.h>".}: cint
-      ## Protocol not supported.
-  EPROTOTYPE* {.importc, header: "<errno.h>".}: cint
-      ## Protocol wrong type for socket.
-  ERANGE* {.importc, header: "<errno.h>".}: cint
-      ## Result too large.
-  EROFS* {.importc, header: "<errno.h>".}: cint
-      ## Read-only file system.
-  ESPIPE* {.importc, header: "<errno.h>".}: cint
-      ## Invalid seek.
-  ESRCH* {.importc, header: "<errno.h>".}: cint
-      ## No such process.
-  ESTALE* {.importc, header: "<errno.h>".}: cint
-      ## Reserved.
-  ETIME* {.importc, header: "<errno.h>".}: cint
-      ## Stream ioctl() timeout.
-  ETIMEDOUT* {.importc, header: "<errno.h>".}: cint
-      ## Connection timed out.
-  ETXTBSY* {.importc, header: "<errno.h>".}: cint
-      ## Text file busy.
-  EWOULDBLOCK* {.importc, header: "<errno.h>".}: cint
-      ## Operation would block (may be the same value as [EAGAIN]).
-  EXDEV* {.importc, header: "<errno.h>".}: cint
-      ## Cross-device link.   
-
-  F_DUPFD* {.importc, header: "<fcntl.h>".}: cint
-    ## Duplicate file descriptor.
-  F_GETFD* {.importc, header: "<fcntl.h>".}: cint
-    ## Get file descriptor flags.
-  F_SETFD* {.importc, header: "<fcntl.h>".}: cint
-    ## Set file descriptor flags.
-  F_GETFL* {.importc, header: "<fcntl.h>".}: cint
-    ## Get file status flags and file access modes.
-  F_SETFL* {.importc, header: "<fcntl.h>".}: cint
-    ## Set file status flags.
-  F_GETLK* {.importc, header: "<fcntl.h>".}: cint
-    ## Get record locking information.
-  F_SETLK* {.importc, header: "<fcntl.h>".}: cint
-    ## Set record locking information.
-  F_SETLKW* {.importc, header: "<fcntl.h>".}: cint
-    ## Set record locking information; wait if blocked.
-  F_GETOWN* {.importc, header: "<fcntl.h>".}: cint
-    ## Get process or process group ID to receive SIGURG signals.
-  F_SETOWN* {.importc, header: "<fcntl.h>".}: cint
-    ## Set process or process group ID to receive SIGURG signals. 
-  FD_CLOEXEC* {.importc, header: "<fcntl.h>".}: cint
-    ## Close the file descriptor upon execution of an exec family function. 
-  F_RDLCK* {.importc, header: "<fcntl.h>".}: cint
-    ## Shared or read lock.
-  F_UNLCK* {.importc, header: "<fcntl.h>".}: cint
-    ## Unlock.
-  F_WRLCK* {.importc, header: "<fcntl.h>".}: cint
-    ## Exclusive or write lock. 
-  O_CREAT* {.importc, header: "<fcntl.h>".}: cint
-    ## Create file if it does not exist.
-  O_EXCL* {.importc, header: "<fcntl.h>".}: cint
-    ## Exclusive use flag.
-  O_NOCTTY* {.importc, header: "<fcntl.h>".}: cint
-    ## Do not assign controlling terminal.
-  O_TRUNC* {.importc, header: "<fcntl.h>".}: cint
-    ## Truncate flag. 
-  O_APPEND* {.importc, header: "<fcntl.h>".}: cint
-    ## Set append mode.
-  O_DSYNC* {.importc, header: "<fcntl.h>".}: cint
-    ## Write according to synchronized I/O data integrity completion.
-  O_NONBLOCK* {.importc, header: "<fcntl.h>".}: cint
-    ## Non-blocking mode.
-  O_RSYNC* {.importc, header: "<fcntl.h>".}: cint
-    ## Synchronized read I/O operations.
-  O_SYNC* {.importc, header: "<fcntl.h>".}: cint
-    ## Write according to synchronized I/O file integrity completion. 
-  O_ACCMODE* {.importc, header: "<fcntl.h>".}: cint
-    ## Mask for file access modes.      
-  O_RDONLY* {.importc, header: "<fcntl.h>".}: cint
-    ## Open for reading only.
-  O_RDWR* {.importc, header: "<fcntl.h>".}: cint
-    ## Open for reading and writing.
-  O_WRONLY* {.importc, header: "<fcntl.h>".}: cint
-    ## Open for writing only. 
-  POSIX_FADV_NORMAL* {.importc, header: "<fcntl.h>".}: cint
-    ## The application has no advice to give on its behavior with
-    ## respect to the specified data. It is the default characteristic
-    ## if no advice is given for an open file.
-  POSIX_FADV_SEQUENTIAL* {.importc, header: "<fcntl.h>".}: cint
-    ## The application expects to access the specified data 
-    # sequentially from lower offsets to higher offsets.
-  POSIX_FADV_RANDOM* {.importc, header: "<fcntl.h>".}: cint
-    ## The application expects to access the specified data in a random order.
-  POSIX_FADV_WILLNEED* {.importc, header: "<fcntl.h>".}: cint
-    ## The application expects to access the specified data in the near future.
-  POSIX_FADV_DONTNEED* {.importc, header: "<fcntl.h>".}: cint
-    ## The application expects that it will not access the specified data
-    ## in the near future.
-  POSIX_FADV_NOREUSE* {.importc, header: "<fcntl.h>".}: cint
-    ## The application expects to access the specified data once and 
-    ## then not reuse it thereafter. 
-
-  FE_DIVBYZERO* {.importc, header: "<fenv.h>".}: cint
-  FE_INEXACT* {.importc, header: "<fenv.h>".}: cint
-  FE_INVALID* {.importc, header: "<fenv.h>".}: cint
-  FE_OVERFLOW* {.importc, header: "<fenv.h>".}: cint
-  FE_UNDERFLOW* {.importc, header: "<fenv.h>".}: cint
-  FE_ALL_EXCEPT* {.importc, header: "<fenv.h>".}: cint
-  FE_DOWNWARD* {.importc, header: "<fenv.h>".}: cint
-  FE_TONEAREST* {.importc, header: "<fenv.h>".}: cint
-  FE_TOWARDZERO* {.importc, header: "<fenv.h>".}: cint
-  FE_UPWARD* {.importc, header: "<fenv.h>".}: cint
-  FE_DFL_ENV* {.importc, header: "<fenv.h>".}: cint
-
-  MM_HARD* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Source of the condition is hardware.
-  MM_SOFT* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Source of the condition is software.
-  MM_FIRM* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Source of the condition is firmware.
-  MM_APPL* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Condition detected by application.
-  MM_UTIL* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Condition detected by utility.
-  MM_OPSYS* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Condition detected by operating system.
-  MM_RECOVER* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Recoverable error.
-  MM_NRECOV* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Non-recoverable error.
-  MM_HALT* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Error causing application to halt.
-  MM_ERROR* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Application has encountered a non-fatal fault.
-  MM_WARNING* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Application has detected unusual non-error condition.
-  MM_INFO* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Informative message.
-  MM_NOSEV* {.importc, header: "<fmtmsg.h>".}: cint
-    ## No severity level provided for the message.
-  MM_PRINT* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Display message on standard error.
-  MM_CONSOLE* {.importc, header: "<fmtmsg.h>".}: cint
-    ## Display message on system console. 
-
-  MM_OK* {.importc, header: "<fmtmsg.h>".}: cint
-    ## The function succeeded.
-  MM_NOTOK* {.importc, header: "<fmtmsg.h>".}: cint
-    ## The function failed completely.
-  MM_NOMSG* {.importc, header: "<fmtmsg.h>".}: cint
-    ## The function was unable to generate a message on standard error, 
-    ## but otherwise succeeded.
-  MM_NOCON* {.importc, header: "<fmtmsg.h>".}: cint
-    ## The function was unable to generate a console message, but 
-    ## otherwise succeeded. 
-    
-  FNM_NOMATCH* {.importc, header: "<fnmatch.h>".}: cint
-    ## The string does not match the specified pattern.
-  FNM_PATHNAME* {.importc, header: "<fnmatch.h>".}: cint
-    ## Slash in string only matches slash in pattern.
-  FNM_PERIOD* {.importc, header: "<fnmatch.h>".}: cint
-    ## Leading period in string must be exactly matched by period in pattern.
-  FNM_NOESCAPE* {.importc, header: "<fnmatch.h>".}: cint
-    ## Disable backslash escaping.
-  FNM_NOSYS* {.importc, header: "<fnmatch.h>".}: cint
-    ## Reserved.
-
-  FTW_F* {.importc, header: "<ftw.h>".}: cint
-    ## File.
-  FTW_D* {.importc, header: "<ftw.h>".}: cint
-    ## Directory.
-  FTW_DNR* {.importc, header: "<ftw.h>".}: cint
-    ## Directory without read permission.
-  FTW_DP* {.importc, header: "<ftw.h>".}: cint
-    ## Directory with subdirectories visited.
-  FTW_NS* {.importc, header: "<ftw.h>".}: cint
-    ## Unknown type; stat() failed.
-  FTW_SL* {.importc, header: "<ftw.h>".}: cint
-    ## Symbolic link.
-  FTW_SLN* {.importc, header: "<ftw.h>".}: cint
-    ## Symbolic link that names a nonexistent file.
-
-  FTW_PHYS* {.importc, header: "<ftw.h>".}: cint
-    ## Physical walk, does not follow symbolic links. Otherwise, nftw() 
-    ## follows links but does not walk down any path that crosses itself.
-  FTW_MOUNT* {.importc, header: "<ftw.h>".}: cint
-    ## The walk does not cross a mount point.
-  FTW_DEPTH* {.importc, header: "<ftw.h>".}: cint
-    ## All subdirectories are visited before the directory itself.
-  FTW_CHDIR* {.importc, header: "<ftw.h>".}: cint
-    ## The walk changes to each directory before reading it. 
-
-  GLOB_APPEND* {.importc, header: "<glob.h>".}: cint
-    ## Append generated pathnames to those previously obtained.
-  GLOB_DOOFFS* {.importc, header: "<glob.h>".}: cint
-    ## Specify how many null pointers to add to the beginning of gl_pathv.
-  GLOB_ERR* {.importc, header: "<glob.h>".}: cint
-    ## Cause glob() to return on error.
-  GLOB_MARK* {.importc, header: "<glob.h>".}: cint
-    ## Each pathname that is a directory that matches pattern has a 
-    ## slash appended.
-  GLOB_NOCHECK* {.importc, header: "<glob.h>".}: cint
-    ## If pattern does not match any pathname, then return a list
-    ## consisting of only pattern.
-  GLOB_NOESCAPE* {.importc, header: "<glob.h>".}: cint
-    ## Disable backslash escaping.
-  GLOB_NOSORT* {.importc, header: "<glob.h>".}: cint
-    ## Do not sort the pathnames returned.
-  GLOB_ABORTED* {.importc, header: "<glob.h>".}: cint
-    ## The scan was stopped because GLOB_ERR was set or errfunc() 
-    ## returned non-zero.
-  GLOB_NOMATCH* {.importc, header: "<glob.h>".}: cint
-    ## The pattern does not match any existing pathname, and GLOB_NOCHECK 
-    ## was not set in flags.
-  GLOB_NOSPACE* {.importc, header: "<glob.h>".}: cint
-    ## An attempt to allocate memory failed.
-  GLOB_NOSYS* {.importc, header: "<glob.h>".}: cint
-    ## Reserved
-
-  CODESET* {.importc, header: "<langinfo.h>".}: cint
-    ## Codeset name.
-  D_T_FMT* {.importc, header: "<langinfo.h>".}: cint
-    ## String for formatting date and time.
-  D_FMT * {.importc, header: "<langinfo.h>".}: cint
-    ## Date format string.
-  T_FMT* {.importc, header: "<langinfo.h>".}: cint
-    ## Time format string.
-  T_FMT_AMPM* {.importc, header: "<langinfo.h>".}: cint
-    ## a.m. or p.m. time format string.
-  AM_STR* {.importc, header: "<langinfo.h>".}: cint
-    ## Ante-meridiem affix.
-  PM_STR* {.importc, header: "<langinfo.h>".}: cint
-    ## Post-meridiem affix.
-  DAY_1* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the first day of the week (for example, Sunday).
-  DAY_2* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the second day of the week (for example, Monday).
-  DAY_3* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the third day of the week (for example, Tuesday).
-  DAY_4* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the fourth day of the week (for example, Wednesday).
-  DAY_5* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the fifth day of the week (for example, Thursday).
-  DAY_6* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the sixth day of the week (for example, Friday).
-  DAY_7* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the seventh day of the week (for example, Saturday).
-  ABDAY_1* {.importc, header: "<langinfo.h>".}: cint
-    ## Abbreviated name of the first day of the week.
-  ABDAY_2* {.importc, header: "<langinfo.h>".}: cint
-  ABDAY_3* {.importc, header: "<langinfo.h>".}: cint
-  ABDAY_4* {.importc, header: "<langinfo.h>".}: cint
-  ABDAY_5* {.importc, header: "<langinfo.h>".}: cint
-  ABDAY_6* {.importc, header: "<langinfo.h>".}: cint
-  ABDAY_7* {.importc, header: "<langinfo.h>".}: cint
-  MON_1* {.importc, header: "<langinfo.h>".}: cint
-    ## Name of the first month of the year.
-  MON_2* {.importc, header: "<langinfo.h>".}: cint
-  MON_3* {.importc, header: "<langinfo.h>".}: cint
-  MON_4* {.importc, header: "<langinfo.h>".}: cint
-  MON_5* {.importc, header: "<langinfo.h>".}: cint
-  MON_6* {.importc, header: "<langinfo.h>".}: cint
-  MON_7* {.importc, header: "<langinfo.h>".}: cint
-  MON_8* {.importc, header: "<langinfo.h>".}: cint
-  MON_9* {.importc, header: "<langinfo.h>".}: cint
-  MON_10* {.importc, header: "<langinfo.h>".}: cint
-  MON_11* {.importc, header: "<langinfo.h>".}: cint
-  MON_12* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_1* {.importc, header: "<langinfo.h>".}: cint
-    ## Abbreviated name of the first month.
-  ABMON_2* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_3* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_4* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_5* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_6* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_7* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_8* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_9* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_10* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_11* {.importc, header: "<langinfo.h>".}: cint
-  ABMON_12* {.importc, header: "<langinfo.h>".}: cint
-  ERA* {.importc, header: "<langinfo.h>".}: cint
-    ## Era description segments.
-  ERA_D_FMT* {.importc, header: "<langinfo.h>".}: cint
-    ## Era date format string.
-  ERA_D_T_FMT* {.importc, header: "<langinfo.h>".}: cint
-    ## Era date and time format string.
-  ERA_T_FMT* {.importc, header: "<langinfo.h>".}: cint
-    ## Era time format string.
-  ALT_DIGITS* {.importc, header: "<langinfo.h>".}: cint
-    ## Alternative symbols for digits.
-  RADIXCHAR* {.importc, header: "<langinfo.h>".}: cint
-    ## Radix character.
-  THOUSEP* {.importc, header: "<langinfo.h>".}: cint
-    ## Separator for thousands.
-  YESEXPR* {.importc, header: "<langinfo.h>".}: cint
-    ## Affirmative response expression.
-  NOEXPR* {.importc, header: "<langinfo.h>".}: cint
-    ## Negative response expression.
-  CRNCYSTR* {.importc, header: "<langinfo.h>".}: cint
-    ## Local currency symbol, preceded by '-' if the symbol 
-    ## should appear before the value, '+' if the symbol should appear 
-    ## after the value, or '.' if the symbol should replace the radix
-    ## character. If the local currency symbol is the empty string, 
-    ## implementations may return the empty string ( "" ).
-
-  LC_ALL* {.importc, header: "<locale.h>".}: cint
-  LC_COLLATE* {.importc, header: "<locale.h>".}: cint
-  LC_CTYPE* {.importc, header: "<locale.h>".}: cint
-  LC_MESSAGES* {.importc, header: "<locale.h>".}: cint
-  LC_MONETARY* {.importc, header: "<locale.h>".}: cint
-  LC_NUMERIC* {.importc, header: "<locale.h>".}: cint
-  LC_TIME* {.importc, header: "<locale.h>".}: cint
-  
-  PTHREAD_BARRIER_SERIAL_THREAD* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CANCEL_ASYNCHRONOUS* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CANCEL_ENABLE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CANCEL_DEFERRED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CANCEL_DISABLE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CANCELED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_COND_INITIALIZER* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CREATE_DETACHED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_CREATE_JOINABLE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_EXPLICIT_SCHED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_INHERIT_SCHED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_MUTEX_DEFAULT* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_MUTEX_ERRORCHECK* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_MUTEX_INITIALIZER* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_MUTEX_NORMAL* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_MUTEX_RECURSIVE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_ONCE_INIT* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_PRIO_INHERIT* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_PRIO_NONE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_PRIO_PROTECT* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_PROCESS_SHARED* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_PROCESS_PRIVATE* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_SCOPE_PROCESS* {.importc, header: "<pthread.h>".}: cint
-  PTHREAD_SCOPE_SYSTEM* {.importc, header: "<pthread.h>".}: cint
-
-  POSIX_ASYNC_IO* {.importc: "_POSIX_ASYNC_IO", header: "<unistd.h>".}: cint
-  POSIX_PRIO_IO* {.importc: "_POSIX_PRIO_IO", header: "<unistd.h>".}: cint
-  POSIX_SYNC_IO* {.importc: "_POSIX_SYNC_IO", header: "<unistd.h>".}: cint
-  F_OK* {.importc: "F_OK", header: "<unistd.h>".}: cint
-  R_OK* {.importc: "R_OK", header: "<unistd.h>".}: cint
-  W_OK* {.importc: "W_OK", header: "<unistd.h>".}: cint
-  X_OK* {.importc: "X_OK", header: "<unistd.h>".}: cint
-
-  CS_PATH* {.importc: "_CS_PATH", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFF32_CFLAGS* {.importc: "_CS_POSIX_V6_ILP32_OFF32_CFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFF32_LDFLAGS* {.importc: "_CS_POSIX_V6_ILP32_OFF32_LDFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFF32_LIBS* {.importc: "_CS_POSIX_V6_ILP32_OFF32_LIBS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFFBIG_CFLAGS* {.importc: "_CS_POSIX_V6_ILP32_OFFBIG_CFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS* {.importc: "_CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_ILP32_OFFBIG_LIBS* {.importc: "_CS_POSIX_V6_ILP32_OFFBIG_LIBS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LP64_OFF64_CFLAGS* {.importc: "_CS_POSIX_V6_LP64_OFF64_CFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LP64_OFF64_LDFLAGS* {.importc: "_CS_POSIX_V6_LP64_OFF64_LDFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LP64_OFF64_LIBS* {.importc: "_CS_POSIX_V6_LP64_OFF64_LIBS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS* {.importc: "_CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS* {.importc: "_CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_LPBIG_OFFBIG_LIBS* {.importc: "_CS_POSIX_V6_LPBIG_OFFBIG_LIBS", header: "<unistd.h>".}: cint
-  CS_POSIX_V6_WIDTH_RESTRICTED_ENVS* {.importc: "_CS_POSIX_V6_WIDTH_RESTRICTED_ENVS", header: "<unistd.h>".}: cint
-  F_LOCK* {.importc: "F_LOCK", header: "<unistd.h>".}: cint
-  F_TEST* {.importc: "F_TEST", header: "<unistd.h>".}: cint
-  F_TLOCK* {.importc: "F_TLOCK", header: "<unistd.h>".}: cint
-  F_ULOCK* {.importc: "F_ULOCK", header: "<unistd.h>".}: cint
-  PC_2_SYMLINKS* {.importc: "_PC_2_SYMLINKS", header: "<unistd.h>".}: cint
-  PC_ALLOC_SIZE_MIN* {.importc: "_PC_ALLOC_SIZE_MIN", header: "<unistd.h>".}: cint
-  PC_ASYNC_IO* {.importc: "_PC_ASYNC_IO", header: "<unistd.h>".}: cint
-  PC_CHOWN_RESTRICTED* {.importc: "_PC_CHOWN_RESTRICTED", header: "<unistd.h>".}: cint
-  PC_FILESIZEBITS* {.importc: "_PC_FILESIZEBITS", header: "<unistd.h>".}: cint
-  PC_LINK_MAX* {.importc: "_PC_LINK_MAX", header: "<unistd.h>".}: cint
-  PC_MAX_CANON* {.importc: "_PC_MAX_CANON", header: "<unistd.h>".}: cint
-
-  PC_MAX_INPUT*{.importc: "_PC_MAX_INPUT", header: "<unistd.h>".}: cint
-  PC_NAME_MAX*{.importc: "_PC_NAME_MAX", header: "<unistd.h>".}: cint
-  PC_NO_TRUNC*{.importc: "_PC_NO_TRUNC", header: "<unistd.h>".}: cint
-  PC_PATH_MAX*{.importc: "_PC_PATH_MAX", header: "<unistd.h>".}: cint
-  PC_PIPE_BUF*{.importc: "_PC_PIPE_BUF", header: "<unistd.h>".}: cint
-  PC_PRIO_IO*{.importc: "_PC_PRIO_IO", header: "<unistd.h>".}: cint
-  PC_REC_INCR_XFER_SIZE*{.importc: "_PC_REC_INCR_XFER_SIZE", header: "<unistd.h>".}: cint
-  PC_REC_MIN_XFER_SIZE*{.importc: "_PC_REC_MIN_XFER_SIZE", header: "<unistd.h>".}: cint
-  PC_REC_XFER_ALIGN*{.importc: "_PC_REC_XFER_ALIGN", header: "<unistd.h>".}: cint
-  PC_SYMLINK_MAX*{.importc: "_PC_SYMLINK_MAX", header: "<unistd.h>".}: cint
-  PC_SYNC_IO*{.importc: "_PC_SYNC_IO", header: "<unistd.h>".}: cint
-  PC_VDISABLE*{.importc: "_PC_VDISABLE", header: "<unistd.h>".}: cint
-  SC_2_C_BIND*{.importc: "_SC_2_C_BIND", header: "<unistd.h>".}: cint
-  SC_2_C_DEV*{.importc: "_SC_2_C_DEV", header: "<unistd.h>".}: cint
-  SC_2_CHAR_TERM*{.importc: "_SC_2_CHAR_TERM", header: "<unistd.h>".}: cint
-  SC_2_FORT_DEV*{.importc: "_SC_2_FORT_DEV", header: "<unistd.h>".}: cint
-  SC_2_FORT_RUN*{.importc: "_SC_2_FORT_RUN", header: "<unistd.h>".}: cint
-  SC_2_LOCALEDEF*{.importc: "_SC_2_LOCALEDEF", header: "<unistd.h>".}: cint
-  SC_2_PBS*{.importc: "_SC_2_PBS", header: "<unistd.h>".}: cint
-  SC_2_PBS_ACCOUNTING*{.importc: "_SC_2_PBS_ACCOUNTING", header: "<unistd.h>".}: cint
-  SC_2_PBS_CHECKPOINT*{.importc: "_SC_2_PBS_CHECKPOINT", header: "<unistd.h>".}: cint
-  SC_2_PBS_LOCATE*{.importc: "_SC_2_PBS_LOCATE", header: "<unistd.h>".}: cint
-  SC_2_PBS_MESSAGE*{.importc: "_SC_2_PBS_MESSAGE", header: "<unistd.h>".}: cint
-  SC_2_PBS_TRACK*{.importc: "_SC_2_PBS_TRACK", header: "<unistd.h>".}: cint
-  SC_2_SW_DEV*{.importc: "_SC_2_SW_DEV", header: "<unistd.h>".}: cint
-  SC_2_UPE*{.importc: "_SC_2_UPE", header: "<unistd.h>".}: cint
-  SC_2_VERSION*{.importc: "_SC_2_VERSION", header: "<unistd.h>".}: cint
-  SC_ADVISORY_INFO*{.importc: "_SC_ADVISORY_INFO", header: "<unistd.h>".}: cint
-  SC_AIO_LISTIO_MAX*{.importc: "_SC_AIO_LISTIO_MAX", header: "<unistd.h>".}: cint
-  SC_AIO_MAX*{.importc: "_SC_AIO_MAX", header: "<unistd.h>".}: cint
-  SC_AIO_PRIO_DELTA_MAX*{.importc: "_SC_AIO_PRIO_DELTA_MAX", header: "<unistd.h>".}: cint
-  SC_ARG_MAX*{.importc: "_SC_ARG_MAX", header: "<unistd.h>".}: cint
-  SC_ASYNCHRONOUS_IO*{.importc: "_SC_ASYNCHRONOUS_IO", header: "<unistd.h>".}: cint
-  SC_ATEXIT_MAX*{.importc: "_SC_ATEXIT_MAX", header: "<unistd.h>".}: cint
-  SC_BARRIERS*{.importc: "_SC_BARRIERS", header: "<unistd.h>".}: cint
-  SC_BC_BASE_MAX*{.importc: "_SC_BC_BASE_MAX", header: "<unistd.h>".}: cint
-  SC_BC_DIM_MAX*{.importc: "_SC_BC_DIM_MAX", header: "<unistd.h>".}: cint
-  SC_BC_SCALE_MAX*{.importc: "_SC_BC_SCALE_MAX", header: "<unistd.h>".}: cint
-  SC_BC_STRING_MAX*{.importc: "_SC_BC_STRING_MAX", header: "<unistd.h>".}: cint
-  SC_CHILD_MAX*{.importc: "_SC_CHILD_MAX", header: "<unistd.h>".}: cint
-  SC_CLK_TCK*{.importc: "_SC_CLK_TCK", header: "<unistd.h>".}: cint
-  SC_CLOCK_SELECTION*{.importc: "_SC_CLOCK_SELECTION", header: "<unistd.h>".}: cint
-  SC_COLL_WEIGHTS_MAX*{.importc: "_SC_COLL_WEIGHTS_MAX", header: "<unistd.h>".}: cint
-  SC_CPUTIME*{.importc: "_SC_CPUTIME", header: "<unistd.h>".}: cint
-  SC_DELAYTIMER_MAX*{.importc: "_SC_DELAYTIMER_MAX", header: "<unistd.h>".}: cint
-  SC_EXPR_NEST_MAX*{.importc: "_SC_EXPR_NEST_MAX", header: "<unistd.h>".}: cint
-  SC_FSYNC*{.importc: "_SC_FSYNC", header: "<unistd.h>".}: cint
-  SC_GETGR_R_SIZE_MAX*{.importc: "_SC_GETGR_R_SIZE_MAX", header: "<unistd.h>".}: cint
-  SC_GETPW_R_SIZE_MAX*{.importc: "_SC_GETPW_R_SIZE_MAX", header: "<unistd.h>".}: cint
-  SC_HOST_NAME_MAX*{.importc: "_SC_HOST_NAME_MAX", header: "<unistd.h>".}: cint
-  SC_IOV_MAX*{.importc: "_SC_IOV_MAX", header: "<unistd.h>".}: cint
-  SC_IPV6*{.importc: "_SC_IPV6", header: "<unistd.h>".}: cint
-  SC_JOB_CONTROL*{.importc: "_SC_JOB_CONTROL", header: "<unistd.h>".}: cint
-  SC_LINE_MAX*{.importc: "_SC_LINE_MAX", header: "<unistd.h>".}: cint
-  SC_LOGIN_NAME_MAX*{.importc: "_SC_LOGIN_NAME_MAX", header: "<unistd.h>".}: cint
-  SC_MAPPED_FILES*{.importc: "_SC_MAPPED_FILES", header: "<unistd.h>".}: cint
-  SC_MEMLOCK*{.importc: "_SC_MEMLOCK", header: "<unistd.h>".}: cint
-  SC_MEMLOCK_RANGE*{.importc: "_SC_MEMLOCK_RANGE", header: "<unistd.h>".}: cint
-  SC_MEMORY_PROTECTION*{.importc: "_SC_MEMORY_PROTECTION", header: "<unistd.h>".}: cint
-  SC_MESSAGE_PASSING*{.importc: "_SC_MESSAGE_PASSING", header: "<unistd.h>".}: cint
-  SC_MONOTONIC_CLOCK*{.importc: "_SC_MONOTONIC_CLOCK", header: "<unistd.h>".}: cint
-  SC_MQ_OPEN_MAX*{.importc: "_SC_MQ_OPEN_MAX", header: "<unistd.h>".}: cint
-  SC_MQ_PRIO_MAX*{.importc: "_SC_MQ_PRIO_MAX", header: "<unistd.h>".}: cint
-  SC_NGROUPS_MAX*{.importc: "_SC_NGROUPS_MAX", header: "<unistd.h>".}: cint
-  SC_OPEN_MAX*{.importc: "_SC_OPEN_MAX", header: "<unistd.h>".}: cint
-  SC_PAGE_SIZE*{.importc: "_SC_PAGE_SIZE", header: "<unistd.h>".}: cint
-  SC_PRIORITIZED_IO*{.importc: "_SC_PRIORITIZED_IO", header: "<unistd.h>".}: cint
-  SC_PRIORITY_SCHEDULING*{.importc: "_SC_PRIORITY_SCHEDULING", header: "<unistd.h>".}: cint
-  SC_RAW_SOCKETS*{.importc: "_SC_RAW_SOCKETS", header: "<unistd.h>".}: cint
-  SC_RE_DUP_MAX*{.importc: "_SC_RE_DUP_MAX", header: "<unistd.h>".}: cint
-  SC_READER_WRITER_LOCKS*{.importc: "_SC_READER_WRITER_LOCKS", header: "<unistd.h>".}: cint
-  SC_REALTIME_SIGNALS*{.importc: "_SC_REALTIME_SIGNALS", header: "<unistd.h>".}: cint
-  SC_REGEXP*{.importc: "_SC_REGEXP", header: "<unistd.h>".}: cint
-  SC_RTSIG_MAX*{.importc: "_SC_RTSIG_MAX", header: "<unistd.h>".}: cint
-  SC_SAVED_IDS*{.importc: "_SC_SAVED_IDS", header: "<unistd.h>".}: cint
-  SC_SEM_NSEMS_MAX*{.importc: "_SC_SEM_NSEMS_MAX", header: "<unistd.h>".}: cint
-  SC_SEM_VALUE_MAX*{.importc: "_SC_SEM_VALUE_MAX", header: "<unistd.h>".}: cint
-  SC_SEMAPHORES*{.importc: "_SC_SEMAPHORES", header: "<unistd.h>".}: cint
-  SC_SHARED_MEMORY_OBJECTS*{.importc: "_SC_SHARED_MEMORY_OBJECTS", header: "<unistd.h>".}: cint
-  SC_SHELL*{.importc: "_SC_SHELL", header: "<unistd.h>".}: cint
-  SC_SIGQUEUE_MAX*{.importc: "_SC_SIGQUEUE_MAX", header: "<unistd.h>".}: cint
-  SC_SPAWN*{.importc: "_SC_SPAWN", header: "<unistd.h>".}: cint
-  SC_SPIN_LOCKS*{.importc: "_SC_SPIN_LOCKS", header: "<unistd.h>".}: cint
-  SC_SPORADIC_SERVER*{.importc: "_SC_SPORADIC_SERVER", header: "<unistd.h>".}: cint
-  SC_SS_REPL_MAX*{.importc: "_SC_SS_REPL_MAX", header: "<unistd.h>".}: cint
-  SC_STREAM_MAX*{.importc: "_SC_STREAM_MAX", header: "<unistd.h>".}: cint
-  SC_SYMLOOP_MAX*{.importc: "_SC_SYMLOOP_MAX", header: "<unistd.h>".}: cint
-  SC_SYNCHRONIZED_IO*{.importc: "_SC_SYNCHRONIZED_IO", header: "<unistd.h>".}: cint
-  SC_THREAD_ATTR_STACKADDR*{.importc: "_SC_THREAD_ATTR_STACKADDR", header: "<unistd.h>".}: cint
-  SC_THREAD_ATTR_STACKSIZE*{.importc: "_SC_THREAD_ATTR_STACKSIZE", header: "<unistd.h>".}: cint
-  SC_THREAD_CPUTIME*{.importc: "_SC_THREAD_CPUTIME", header: "<unistd.h>".}: cint
-  SC_THREAD_DESTRUCTOR_ITERATIONS*{.importc: "_SC_THREAD_DESTRUCTOR_ITERATIONS", header: "<unistd.h>".}: cint
-  SC_THREAD_KEYS_MAX*{.importc: "_SC_THREAD_KEYS_MAX", header: "<unistd.h>".}: cint
-  SC_THREAD_PRIO_INHERIT*{.importc: "_SC_THREAD_PRIO_INHERIT", header: "<unistd.h>".}: cint
-  SC_THREAD_PRIO_PROTECT*{.importc: "_SC_THREAD_PRIO_PROTECT", header: "<unistd.h>".}: cint
-  SC_THREAD_PRIORITY_SCHEDULING*{.importc: "_SC_THREAD_PRIORITY_SCHEDULING", header: "<unistd.h>".}: cint
-  SC_THREAD_PROCESS_SHARED*{.importc: "_SC_THREAD_PROCESS_SHARED", header: "<unistd.h>".}: cint
-  SC_THREAD_SAFE_FUNCTIONS*{.importc: "_SC_THREAD_SAFE_FUNCTIONS", header: "<unistd.h>".}: cint
-  SC_THREAD_SPORADIC_SERVER*{.importc: "_SC_THREAD_SPORADIC_SERVER", header: "<unistd.h>".}: cint
-  SC_THREAD_STACK_MIN*{.importc: "_SC_THREAD_STACK_MIN", header: "<unistd.h>".}: cint
-  SC_THREAD_THREADS_MAX*{.importc: "_SC_THREAD_THREADS_MAX", header: "<unistd.h>".}: cint
-  SC_THREADS*{.importc: "_SC_THREADS", header: "<unistd.h>".}: cint
-  SC_TIMEOUTS*{.importc: "_SC_TIMEOUTS", header: "<unistd.h>".}: cint
-  SC_TIMER_MAX*{.importc: "_SC_TIMER_MAX", header: "<unistd.h>".}: cint
-  SC_TIMERS*{.importc: "_SC_TIMERS", header: "<unistd.h>".}: cint
-  SC_TRACE*{.importc: "_SC_TRACE", header: "<unistd.h>".}: cint
-  SC_TRACE_EVENT_FILTER*{.importc: "_SC_TRACE_EVENT_FILTER", header: "<unistd.h>".}: cint
-  SC_TRACE_EVENT_NAME_MAX*{.importc: "_SC_TRACE_EVENT_NAME_MAX", header: "<unistd.h>".}: cint
-  SC_TRACE_INHERIT*{.importc: "_SC_TRACE_INHERIT", header: "<unistd.h>".}: cint
-  SC_TRACE_LOG*{.importc: "_SC_TRACE_LOG", header: "<unistd.h>".}: cint
-  SC_TRACE_NAME_MAX*{.importc: "_SC_TRACE_NAME_MAX", header: "<unistd.h>".}: cint
-  SC_TRACE_SYS_MAX*{.importc: "_SC_TRACE_SYS_MAX", header: "<unistd.h>".}: cint
-  SC_TRACE_USER_EVENT_MAX*{.importc: "_SC_TRACE_USER_EVENT_MAX", header: "<unistd.h>".}: cint
-  SC_TTY_NAME_MAX*{.importc: "_SC_TTY_NAME_MAX", header: "<unistd.h>".}: cint
-  SC_TYPED_MEMORY_OBJECTS*{.importc: "_SC_TYPED_MEMORY_OBJECTS", header: "<unistd.h>".}: cint
-  SC_TZNAME_MAX*{.importc: "_SC_TZNAME_MAX", header: "<unistd.h>".}: cint
-  SC_V6_ILP32_OFF32*{.importc: "_SC_V6_ILP32_OFF32", header: "<unistd.h>".}: cint
-  SC_V6_ILP32_OFFBIG*{.importc: "_SC_V6_ILP32_OFFBIG", header: "<unistd.h>".}: cint
-  SC_V6_LP64_OFF64*{.importc: "_SC_V6_LP64_OFF64", header: "<unistd.h>".}: cint
-  SC_V6_LPBIG_OFFBIG*{.importc: "_SC_V6_LPBIG_OFFBIG", header: "<unistd.h>".}: cint
-  SC_VERSION*{.importc: "_SC_VERSION", header: "<unistd.h>".}: cint
-  SC_XBS5_ILP32_OFF32*{.importc: "_SC_XBS5_ILP32_OFF32", header: "<unistd.h>".}: cint
-  SC_XBS5_ILP32_OFFBIG*{.importc: "_SC_XBS5_ILP32_OFFBIG", header: "<unistd.h>".}: cint
-  SC_XBS5_LP64_OFF64*{.importc: "_SC_XBS5_LP64_OFF64", header: "<unistd.h>".}: cint
-  SC_XBS5_LPBIG_OFFBIG*{.importc: "_SC_XBS5_LPBIG_OFFBIG", 
-                         header: "<unistd.h>".}: cint
-  SC_XOPEN_CRYPT*{.importc: "_SC_XOPEN_CRYPT", header: "<unistd.h>".}: cint
-  SC_XOPEN_ENH_I18N*{.importc: "_SC_XOPEN_ENH_I18N", header: "<unistd.h>".}: cint
-  SC_XOPEN_LEGACY*{.importc: "_SC_XOPEN_LEGACY", header: "<unistd.h>".}: cint
-  SC_XOPEN_REALTIME*{.importc: "_SC_XOPEN_REALTIME", header: "<unistd.h>".}: cint
-  SC_XOPEN_REALTIME_THREADS*{.importc: "_SC_XOPEN_REALTIME_THREADS", 
-                              header: "<unistd.h>".}: cint
-  SC_XOPEN_SHM*{.importc: "_SC_XOPEN_SHM", header: "<unistd.h>".}: cint
-  SC_XOPEN_STREAMS*{.importc: "_SC_XOPEN_STREAMS", header: "<unistd.h>".}: cint
-  SC_XOPEN_UNIX*{.importc: "_SC_XOPEN_UNIX", header: "<unistd.h>".}: cint
-  SC_XOPEN_VERSION*{.importc: "_SC_XOPEN_VERSION", header: "<unistd.h>".}: cint
-  
-  SEM_FAILED* {.importc, header: "<semaphore.h>".}: pointer
-  IPC_CREAT* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Create entry if key does not exist.
-  IPC_EXCL* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Fail if key exists.
-  IPC_NOWAIT* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Error if request must wait.
-
-  IPC_PRIVATE* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Private key.
-
-  IPC_RMID* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Remove identifier.
-  IPC_SET* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Set options.
-  IPC_STAT* {.importc, header: "<sys/ipc.h>".}: cint
-    ## Get options. 
-
-  S_IFMT* {.importc, header: "<sys/stat.h>".}: cint
-    ## Type of file.
-  S_IFBLK* {.importc, header: "<sys/stat.h>".}: cint
-    ## Block special.
-  S_IFCHR* {.importc, header: "<sys/stat.h>".}: cint
-    ## Character special.
-  S_IFIFO* {.importc, header: "<sys/stat.h>".}: cint
-    ## FIFO special.
-  S_IFREG* {.importc, header: "<sys/stat.h>".}: cint
-    ## Regular.
-  S_IFDIR* {.importc, header: "<sys/stat.h>".}: cint
-    ## Directory.
-  S_IFLNK* {.importc, header: "<sys/stat.h>".}: cint
-    ## Symbolic link.
-  S_IFSOCK* {.importc, header: "<sys/stat.h>".}: cint
-    ## Socket.
-  S_IRWXU* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read, write, execute/search by owner.
-  S_IRUSR* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read permission, owner.
-  S_IWUSR* {.importc, header: "<sys/stat.h>".}: cint
-    ## Write permission, owner.
-  S_IXUSR* {.importc, header: "<sys/stat.h>".}: cint
-    ## Execute/search permission, owner.
-  S_IRWXG* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read, write, execute/search by group.
-  S_IRGRP* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read permission, group.
-  S_IWGRP* {.importc, header: "<sys/stat.h>".}: cint
-    ## Write permission, group.
-  S_IXGRP* {.importc, header: "<sys/stat.h>".}: cint
-    ## Execute/search permission, group.
-  S_IRWXO* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read, write, execute/search by others.
-  S_IROTH* {.importc, header: "<sys/stat.h>".}: cint
-    ## Read permission, others.
-  S_IWOTH* {.importc, header: "<sys/stat.h>".}: cint
-    ## Write permission, others.
-  S_IXOTH* {.importc, header: "<sys/stat.h>".}: cint
-    ## Execute/search permission, others.
-  S_ISUID* {.importc, header: "<sys/stat.h>".}: cint
-    ## Set-user-ID on execution.
-  S_ISGID* {.importc, header: "<sys/stat.h>".}: cint
-    ## Set-group-ID on execution.
-  S_ISVTX* {.importc, header: "<sys/stat.h>".}: cint
-    ## On directories, restricted deletion flag.
-  
-  ST_RDONLY* {.importc, header: "<sys/statvfs.h>".}: cint
-    ## Read-only file system.
-  ST_NOSUID* {.importc, header: "<sys/statvfs.h>".}: cint
-    ## Does not support the semantics of the ST_ISUID and ST_ISGID file mode bits.
-       
-  PROT_READ* {.importc, header: "<sys/mman.h>".}: cint
-    ## Page can be read.
-  PROT_WRITE* {.importc, header: "<sys/mman.h>".}: cint
-    ## Page can be written.
-  PROT_EXEC* {.importc, header: "<sys/mman.h>".}: cint
-    ## Page can be executed.
-  PROT_NONE* {.importc, header: "<sys/mman.h>".}: cint
-    ## Page cannot be accessed.
-  MAP_SHARED* {.importc, header: "<sys/mman.h>".}: cint
-    ## Share changes.
-  MAP_PRIVATE* {.importc, header: "<sys/mman.h>".}: cint
-    ## Changes are private.
-  MAP_FIXED* {.importc, header: "<sys/mman.h>".}: cint
-    ## Interpret addr exactly.
-  MS_ASYNC* {.importc, header: "<sys/mman.h>".}: cint
-    ## Perform asynchronous writes.
-  MS_SYNC* {.importc, header: "<sys/mman.h>".}: cint
-    ## Perform synchronous writes.
-  MS_INVALIDATE* {.importc, header: "<sys/mman.h>".}: cint
-    ## Invalidate mappings.
-  MCL_CURRENT* {.importc, header: "<sys/mman.h>".}: cint
-    ## Lock currently mapped pages.
-  MCL_FUTURE* {.importc, header: "<sys/mman.h>".}: cint
-    ## Lock pages that become mapped.
-  MAP_FAILED* {.importc, header: "<sys/mman.h>".}: cint
-  POSIX_MADV_NORMAL* {.importc, header: "<sys/mman.h>".}: cint
-    ## The application has no advice to give on its behavior with 
-    ## respect to the specified range. It is the default characteristic 
-    ## if no advice is given for a range of memory.
-  POSIX_MADV_SEQUENTIAL* {.importc, header: "<sys/mman.h>".}: cint
-    ## The application expects to access the specified range sequentially
-    ## from lower addresses to higher addresses.
-  POSIX_MADV_RANDOM* {.importc, header: "<sys/mman.h>".}: cint
-    ## The application expects to access the specified range in a random order.
-  POSIX_MADV_WILLNEED* {.importc, header: "<sys/mman.h>".}: cint
-    ## The application expects to access the specified range in the near future.
-  POSIX_MADV_DONTNEED* {.importc, header: "<sys/mman.h>".}: cint
-  POSIX_TYPED_MEM_ALLOCATE* {.importc, header: "<sys/mman.h>".}: cint
-  POSIX_TYPED_MEM_ALLOCATE_CONTIG* {.importc, header: "<sys/mman.h>".}: cint
-  POSIX_TYPED_MEM_MAP_ALLOCATABLE* {.importc, header: "<sys/mman.h>".}: cint
-
-
-  CLOCKS_PER_SEC* {.importc, header: "<time.h>".}: int
-    ## A number used to convert the value returned by the clock() function
-    ## into seconds.
-  CLOCK_PROCESS_CPUTIME_ID* {.importc, header: "<time.h>".}: cint
-    ## The identifier of the CPU-time clock associated with the process 
-    ## making a clock() or timer*() function call.
-  CLOCK_THREAD_CPUTIME_ID* {.importc, header: "<time.h>".}: cint
-  CLOCK_REALTIME* {.importc, header: "<time.h>".}: cint
-    ## The identifier of the system-wide realtime clock.
-  TIMER_ABSTIME* {.importc, header: "<time.h>".}: cint
-    ## Flag indicating time is absolute. For functions taking timer 
-    ## objects, this refers to the clock associated with the timer.
-  CLOCK_MONOTONIC* {.importc, header: "<time.h>".}: cint
-
-  WNOHANG* {.importc, header: "<sys/wait.h>".}: cint
-    ## Do not hang if no status is available; return immediately.
-  WUNTRACED* {.importc, header: "<sys/wait.h>".}: cint
-    ## Report status of stopped child process.
-  WEXITSTATUS* {.importc, header: "<sys/wait.h>".}: cint
-    ## Return exit status.
-  WIFCONTINUED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child has been continued.
-  WIFEXITED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child exited normally.
-  WIFSIGNALED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child exited due to uncaught signal.
-  WIFSTOPPED* {.importc, header: "<sys/wait.h>".}: cint
-    ## True if child is currently stopped.
-  WSTOPSIG* {.importc, header: "<sys/wait.h>".}: cint
-    ## Return signal number that caused process to stop.
-  WTERMSIG* {.importc, header: "<sys/wait.h>".}: cint
-    ## Return signal number that caused process to terminate.
-  WEXITED* {.importc, header: "<sys/wait.h>".}: cint
-    ## Wait for processes that have exited.
-  WSTOPPED* {.importc, header: "<sys/wait.h>".}: cint
-    ## Status is returned for any child that has stopped upon receipt of a signal.
-  WCONTINUED* {.importc, header: "<sys/wait.h>".}: cint
-    ## Status is returned for any child that was stopped and has been continued.
-  WNOWAIT* {.importc, header: "<sys/wait.h>".}: cint
-    ## Keep the process whose status is returned in infop in a waitable state. 
-  P_ALL* {.importc, header: "<sys/wait.h>".}: cint 
-  P_PID* {.importc, header: "<sys/wait.h>".}: cint 
-  P_PGID* {.importc, header: "<sys/wait.h>".}: cint
-       
-  SIG_DFL* {.importc, header: "<signal.h>".}: proc (x: cint) {.noconv.}
-    ## Request for default signal handling.
-  SIG_ERR* {.importc, header: "<signal.h>".}: proc (x: cint) {.noconv.}
-    ## Return value from signal() in case of error.
-  cSIG_HOLD* {.importc: "SIG_HOLD", header: "<signal.h>".}: proc (x: cint) {.noconv.}
-    ## Request that signal be held.
-  SIG_IGN* {.importc, header: "<signal.h>".}: proc (x: cint) {.noconv.}
-    ## Request that signal be ignored. 
-
-  SIGEV_NONE* {.importc, header: "<signal.h>".}: cint
-  SIGEV_SIGNAL* {.importc, header: "<signal.h>".}: cint
-  SIGEV_THREAD* {.importc, header: "<signal.h>".}: cint
-  SIGABRT* {.importc, header: "<signal.h>".}: cint
-  SIGALRM* {.importc, header: "<signal.h>".}: cint
-  SIGBUS* {.importc, header: "<signal.h>".}: cint
-  SIGCHLD* {.importc, header: "<signal.h>".}: cint
-  SIGCONT* {.importc, header: "<signal.h>".}: cint
-  SIGFPE* {.importc, header: "<signal.h>".}: cint
-  SIGHUP* {.importc, header: "<signal.h>".}: cint
-  SIGILL* {.importc, header: "<signal.h>".}: cint
-  SIGINT* {.importc, header: "<signal.h>".}: cint
-  SIGKILL* {.importc, header: "<signal.h>".}: cint
-  SIGPIPE* {.importc, header: "<signal.h>".}: cint
-  SIGQUIT* {.importc, header: "<signal.h>".}: cint
-  SIGSEGV* {.importc, header: "<signal.h>".}: cint
-  SIGSTOP* {.importc, header: "<signal.h>".}: cint
-  SIGTERM* {.importc, header: "<signal.h>".}: cint
-  SIGTSTP* {.importc, header: "<signal.h>".}: cint
-  SIGTTIN* {.importc, header: "<signal.h>".}: cint
-  SIGTTOU* {.importc, header: "<signal.h>".}: cint
-  SIGUSR1* {.importc, header: "<signal.h>".}: cint
-  SIGUSR2* {.importc, header: "<signal.h>".}: cint
-  SIGPOLL* {.importc, header: "<signal.h>".}: cint
-  SIGPROF* {.importc, header: "<signal.h>".}: cint
-  SIGSYS* {.importc, header: "<signal.h>".}: cint
-  SIGTRAP* {.importc, header: "<signal.h>".}: cint
-  SIGURG* {.importc, header: "<signal.h>".}: cint
-  SIGVTALRM* {.importc, header: "<signal.h>".}: cint
-  SIGXCPU* {.importc, header: "<signal.h>".}: cint
-  SIGXFSZ* {.importc, header: "<signal.h>".}: cint
-  SA_NOCLDSTOP* {.importc, header: "<signal.h>".}: cint
-  SIG_BLOCK* {.importc, header: "<signal.h>".}: cint
-  SIG_UNBLOCK* {.importc, header: "<signal.h>".}: cint
-  SIG_SETMASK* {.importc, header: "<signal.h>".}: cint
-  SA_ONSTACK* {.importc, header: "<signal.h>".}: cint
-  SA_RESETHAND* {.importc, header: "<signal.h>".}: cint
-  SA_RESTART* {.importc, header: "<signal.h>".}: cint
-  SA_SIGINFO* {.importc, header: "<signal.h>".}: cint
-  SA_NOCLDWAIT* {.importc, header: "<signal.h>".}: cint
-  SA_NODEFER* {.importc, header: "<signal.h>".}: cint
-  SS_ONSTACK* {.importc, header: "<signal.h>".}: cint
-  SS_DISABLE* {.importc, header: "<signal.h>".}: cint
-  MINSIGSTKSZ* {.importc, header: "<signal.h>".}: cint
-  SIGSTKSZ* {.importc, header: "<signal.h>".}: cint
-
-  NL_SETD* {.importc, header: "<nl_types.h>".}: cint
-  NL_CAT_LOCALE* {.importc, header: "<nl_types.h>".}: cint
-
-  SCHED_FIFO* {.importc, header: "<sched.h>".}: cint
-  SCHED_RR* {.importc, header: "<sched.h>".}: cint
-  SCHED_SPORADIC* {.importc, header: "<sched.h>".}: cint
-  SCHED_OTHER* {.importc, header: "<sched.h>".}: cint
-  FD_SETSIZE* {.importc, header: "<sys/select.h>".}: cint
-
-  SEEK_SET* {.importc, header: "<unistd.h>".}: cint
-  SEEK_CUR* {.importc, header: "<unistd.h>".}: cint
-  SEEK_END* {.importc, header: "<unistd.h>".}: cint
-
-  SCM_RIGHTS* {.importc, header: "<sys/socket.h>".}: cint
-    ## Indicates that the data array contains the access rights 
-    ## to be sent or received. 
-
-  SOCK_DGRAM* {.importc, header: "<sys/socket.h>".}: cint ## Datagram socket.
-  SOCK_RAW* {.importc, header: "<sys/socket.h>".}: cint
-    ## Raw Protocol Interface.
-  SOCK_SEQPACKET* {.importc, header: "<sys/socket.h>".}: cint
-    ## Sequenced-packet socket.
-  SOCK_STREAM* {.importc, header: "<sys/socket.h>".}: cint
-    ## Byte-stream socket. 
-    
-  SOL_SOCKET* {.importc, header: "<sys/socket.h>".}: cint
-    ## Options to be accessed at socket level, not protocol level. 
-    
-  SO_ACCEPTCONN* {.importc, header: "<sys/socket.h>".}: cint
-    ## Socket is accepting connections.
-  SO_BROADCAST* {.importc, header: "<sys/socket.h>".}: cint
-    ## Transmission of broadcast messages is supported.
-  SO_DEBUG* {.importc, header: "<sys/socket.h>".}: cint
-    ## Debugging information is being recorded.
-  SO_DONTROUTE* {.importc, header: "<sys/socket.h>".}: cint
-    ## Bypass normal routing.
-  SO_ERROR* {.importc, header: "<sys/socket.h>".}: cint
-    ## Socket error status.
-  SO_KEEPALIVE* {.importc, header: "<sys/socket.h>".}: cint
-    ## Connections are kept alive with periodic messages.
-  SO_LINGER* {.importc, header: "<sys/socket.h>".}: cint
-    ## Socket lingers on close.
-  SO_OOBINLINE* {.importc, header: "<sys/socket.h>".}: cint
-    ## Out-of-band data is transmitted in line.
-  SO_RCVBUF* {.importc, header: "<sys/socket.h>".}: cint
-    ## Receive buffer size.
-  SO_RCVLOWAT* {.importc, header: "<sys/socket.h>".}: cint
-    ## Receive *low water mark*.
-  SO_RCVTIMEO* {.importc, header: "<sys/socket.h>".}: cint
-    ## Receive timeout.
-  SO_REUSEADDR* {.importc, header: "<sys/socket.h>".}: cint
-    ## Reuse of local addresses is supported.
-  SO_SNDBUF* {.importc, header: "<sys/socket.h>".}: cint
-    ## Send buffer size.
-  SO_SNDLOWAT* {.importc, header: "<sys/socket.h>".}: cint
-    ## Send *low water mark*.
-  SO_SNDTIMEO* {.importc, header: "<sys/socket.h>".}: cint
-    ## Send timeout.
-  SO_TYPE* {.importc, header: "<sys/socket.h>".}: cint
-    ## Socket type. 
-      
-  SOMAXCONN* {.importc, header: "<sys/socket.h>".}: cint
-    ## The maximum backlog queue length. 
-    
-  MSG_CTRUNC* {.importc, header: "<sys/socket.h>".}: cint
-    ## Control data truncated.
-  MSG_DONTROUTE* {.importc, header: "<sys/socket.h>".}: cint
-    ## Send without using routing tables.
-  MSG_EOR* {.importc, header: "<sys/socket.h>".}: cint
-    ## Terminates a record (if supported by the protocol).
-  MSG_OOB* {.importc, header: "<sys/socket.h>".}: cint
-    ## Out-of-band data.
-  MSG_PEEK* {.importc, header: "<sys/socket.h>".}: cint
-    ## Leave received data in queue.
-  MSG_TRUNC* {.importc, header: "<sys/socket.h>".}: cint
-    ## Normal data truncated.
-  MSG_WAITALL* {.importc, header: "<sys/socket.h>".}: cint
-    ## Attempt to fill the read buffer. 
-
-  AF_INET* {.importc, header: "<sys/socket.h>".}: cint
-    ## Internet domain sockets for use with IPv4 addresses.
-  AF_INET6* {.importc, header: "<sys/socket.h>".}: cint
-    ## Internet domain sockets for use with IPv6 addresses.
-  AF_UNIX* {.importc, header: "<sys/socket.h>".}: cint
-    ## UNIX domain sockets.
-  AF_UNSPEC* {.importc, header: "<sys/socket.h>".}: cint
-    ## Unspecified. 
-
-  SHUT_RD* {.importc, header: "<sys/socket.h>".}: cint
-    ## Disables further receive operations.
-  SHUT_RDWR* {.importc, header: "<sys/socket.h>".}: cint
-    ## Disables further send and receive operations.
-  SHUT_WR* {.importc, header: "<sys/socket.h>".}: cint
-    ## Disables further send operations. 
-
-  IF_NAMESIZE* {.importc, header: "<net/if.h>".}: cint
-    
-  IPPROTO_IP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Internet protocol.
-  IPPROTO_IPV6* {.importc, header: "<netinet/in.h>".}: cint
-    ## Internet Protocol Version 6.
-  IPPROTO_ICMP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Control message protocol.
-  IPPROTO_RAW* {.importc, header: "<netinet/in.h>".}: cint
-    ## Raw IP Packets Protocol. 
-  IPPROTO_TCP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Transmission control protocol.
-  IPPROTO_UDP* {.importc, header: "<netinet/in.h>".}: cint
-    ## User datagram protocol.
-
-  INADDR_ANY* {.importc, header: "<netinet/in.h>".}: TinAddrScalar
-    ## IPv4 local host address.
-  INADDR_BROADCAST* {.importc, header: "<netinet/in.h>".}: TinAddrScalar
-    ## IPv4 broadcast address.
-
-  INET_ADDRSTRLEN* {.importc, header: "<netinet/in.h>".}: cint
-    ## 16. Length of the string form for IP. 
-
-  IPV6_JOIN_GROUP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Join a multicast group.
-  IPV6_LEAVE_GROUP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Quit a multicast group.
-  IPV6_MULTICAST_HOPS* {.importc, header: "<netinet/in.h>".}: cint
-    ## Multicast hop limit.
-  IPV6_MULTICAST_IF* {.importc, header: "<netinet/in.h>".}: cint
-    ## Interface to use for outgoing multicast packets.
-  IPV6_MULTICAST_LOOP* {.importc, header: "<netinet/in.h>".}: cint
-    ## Multicast packets are delivered back to the local application.
-  IPV6_UNICAST_HOPS* {.importc, header: "<netinet/in.h>".}: cint
-    ## Unicast hop limit.
-  IPV6_V6ONLY* {.importc, header: "<netinet/in.h>".}: cint
-    ## Restrict AF_INET6 socket to IPv6 communications only.
-
-  TCP_NODELAY* {.importc, header: "<netinet/tcp.h>".}: cint
-    ## Avoid coalescing of small segments. 
-
-  IPPORT_RESERVED* {.importc, header: "<netdb.h>".}: cint 
-
-  HOST_NOT_FOUND* {.importc, header: "<netdb.h>".}: cint 
-  NO_DATA* {.importc, header: "<netdb.h>".}: cint 
-  NO_RECOVERY* {.importc, header: "<netdb.h>".}: cint 
-  TRY_AGAIN* {.importc, header: "<netdb.h>".}: cint 
-
-  AI_PASSIVE* {.importc, header: "<netdb.h>".}: cint 
-    ## Socket address is intended for bind().
-  AI_CANONNAME* {.importc, header: "<netdb.h>".}: cint 
-    ## Request for canonical name.
-  AI_NUMERICHOST* {.importc, header: "<netdb.h>".}: cint 
-    ## Return numeric host address as name.
-  AI_NUMERICSERV* {.importc, header: "<netdb.h>".}: cint 
-    ## Inhibit service name resolution.
-  AI_V4MAPPED* {.importc, header: "<netdb.h>".}: cint 
-     ## If no IPv6 addresses are found, query for IPv4 addresses and
-     ## return them to the caller as IPv4-mapped IPv6 addresses.
-  AI_ALL* {.importc, header: "<netdb.h>".}: cint 
-    ## Query for both IPv4 and IPv6 addresses.
-  AI_ADDRCONFIG* {.importc, header: "<netdb.h>".}: cint 
-    ## Query for IPv4 addresses only when an IPv4 address is configured; 
-    ## query for IPv6 addresses only when an IPv6 address is configured.
-
-  NI_NOFQDN* {.importc, header: "<netdb.h>".}: cint 
-    ## Only the nodename portion of the FQDN is returned for local hosts.
-  NI_NUMERICHOST* {.importc, header: "<netdb.h>".}: cint 
-    ## The numeric form of the node's address is returned instead of its name.
-  NI_NAMEREQD* {.importc, header: "<netdb.h>".}: cint 
-    ## Return an error if the node's name cannot be located in the database.
-  NI_NUMERICSERV* {.importc, header: "<netdb.h>".}: cint 
-    ## The numeric form of the service address is returned instead of its name.
-  NI_NUMERICSCOPE* {.importc, header: "<netdb.h>".}: cint 
-    ## For IPv6 addresses, the numeric form of the scope identifier is
-    ## returned instead of its name.
-  NI_DGRAM* {.importc, header: "<netdb.h>".}: cint 
-    ## Indicates that the service is a datagram service (SOCK_DGRAM). 
-
-  EAI_AGAIN* {.importc, header: "<netdb.h>".}: cint 
-    ## The name could not be resolved at this time. Future attempts may succeed.
-  EAI_BADFLAGS* {.importc, header: "<netdb.h>".}: cint 
-    ## The flags had an invalid value.
-  EAI_FAIL* {.importc, header: "<netdb.h>".}: cint 
-    ## A non-recoverable error occurred.
-  EAI_FAMILY* {.importc, header: "<netdb.h>".}: cint 
-    ## The address family was not recognized or the address length 
-    ## was invalid for the specified family.
-  EAI_MEMORY* {.importc, header: "<netdb.h>".}: cint 
-    ## There was a memory allocation failure.
-  EAI_NONAME* {.importc, header: "<netdb.h>".}: cint 
-    ## The name does not resolve for the supplied parameters.
-    ## NI_NAMEREQD is set and the host's name cannot be located, 
-    ## or both nodename and servname were null.
-  EAI_SERVICE* {.importc, header: "<netdb.h>".}: cint 
-    ## The service passed was not recognized for the specified socket type.
-  EAI_SOCKTYPE* {.importc, header: "<netdb.h>".}: cint 
-    ## The intended socket type was not recognized.
-  EAI_SYSTEM* {.importc, header: "<netdb.h>".}: cint 
-    ## A system error occurred. The error code can be found in errno.
-  EAI_OVERFLOW* {.importc, header: "<netdb.h>".}: cint 
-    ## An argument buffer overflowed.
-
-  POLLIN* {.importc, header: "<poll.h>".}: cshort
-    ## Data other than high-priority data may be read without blocking.
-  POLLRDNORM* {.importc, header: "<poll.h>".}: cshort
-    ## Normal data may be read without blocking.
-  POLLRDBAND* {.importc, header: "<poll.h>".}: cshort
-    ## Priority data may be read without blocking.
-  POLLPRI* {.importc, header: "<poll.h>".}: cshort
-    ## High priority data may be read without blocking.
-  POLLOUT* {.importc, header: "<poll.h>".}: cshort
-    ## Normal data may be written without blocking.
-  POLLWRNORM* {.importc, header: "<poll.h>".}: cshort
-    ## Equivalent to POLLOUT.
-  POLLWRBAND* {.importc, header: "<poll.h>".}: cshort
-    ## Priority data may be written.
-  POLLERR* {.importc, header: "<poll.h>".}: cshort
-    ## An error has occurred (revents only).
-  POLLHUP* {.importc, header: "<poll.h>".}: cshort
-    ## Device has been disconnected (revents only).
-  POLLNVAL* {.importc, header: "<poll.h>".}: cshort
-    ## Invalid fd member (revents only). 
-
-
-when hasSpawnh:
-  var
-    POSIX_SPAWN_RESETIDS* {.importc, header: "<spawn.h>".}: cint
-    POSIX_SPAWN_SETPGROUP* {.importc, header: "<spawn.h>".}: cint
-    POSIX_SPAWN_SETSCHEDPARAM* {.importc, header: "<spawn.h>".}: cint
-    POSIX_SPAWN_SETSCHEDULER* {.importc, header: "<spawn.h>".}: cint
-    POSIX_SPAWN_SETSIGDEF* {.importc, header: "<spawn.h>".}: cint
-    POSIX_SPAWN_SETSIGMASK* {.importc, header: "<spawn.h>".}: cint
+  STDOUT_FILENO* = 1 ## File number of stdout;
+
+  DT_UNKNOWN* = 0 ## Unknown file type.
+  DT_FIFO* = 1    ## Named pipe, or FIFO.
+  DT_CHR* = 2     ## Character device.
+  DT_DIR* = 4     ## Directory.
+  DT_BLK* = 6     ## Block device.
+  DT_REG* = 8     ## Regular file.
+  DT_LNK* = 10    ## Symbolic link.
+  DT_SOCK* = 12   ## UNIX domain socket.
+  DT_WHT* = 14
+
+# Special types
+type Sighandler = proc (a: cint) {.noconv.}
+
+const StatHasNanoseconds* = defined(linux) or defined(freebsd) or
+    defined(osx) or defined(openbsd) or defined(dragonfly) or defined(haiku) ## \
+  ## Boolean flag that indicates if the system supports nanosecond time
+  ## resolution in the fields of `Stat`. Note that the nanosecond based fields
+  ## (`Stat.st_atim`, `Stat.st_mtim` and `Stat.st_ctim`) can be accessed
+  ## without checking this flag, because this module defines fallback procs
+  ## when they are not available.
+
+# Platform specific stuff
+
+when (defined(linux) and not defined(android)) and defined(amd64):
+  include posix_linux_amd64
+elif defined(openbsd) and defined(amd64):
+  include posix_openbsd_amd64
+elif (defined(macos) or defined(macosx) or defined(bsd)) and defined(cpu64):
+  include posix_macos_amd64
+elif defined(nintendoswitch):
+  include posix_nintendoswitch
+elif defined(haiku):
+  include posix_haiku
+else:
+  include posix_other
+
+# There used to be this name in posix.nim a long time ago, not sure why!
+
+when StatHasNanoseconds:
+  proc st_atime*(s: Stat): Time {.inline.} =
+    ## Second-granularity time of last access.
+    result = s.st_atim.tv_sec
+  proc st_mtime*(s: Stat): Time {.inline.} =
+    ## Second-granularity time of last data modification.
+    result = s.st_mtim.tv_sec
+  proc st_ctime*(s: Stat): Time {.inline.} =
+    ## Second-granularity time of last status change.
+    result = s.st_ctim.tv_sec
+else:
+  proc st_atim*(s: Stat): Timespec {.inline.} =
+    ## Nanosecond-granularity time of last access.
+    result.tv_sec = s.st_atime
+  proc st_mtim*(s: Stat): Timespec {.inline.} =
+    ## Nanosecond-granularity time of last data modification.
+    result.tv_sec = s.st_mtime
+  proc st_ctim*(s: Stat): Timespec {.inline.} =
+    ## Nanosecond-granularity time of last data modification.
+    result.tv_sec = s.st_ctime
 
 when hasAioH:
   proc aio_cancel*(a1: cint, a2: ptr Taiocb): cint {.importc, header: "<aio.h>".}
@@ -1669,290 +142,373 @@ when hasAioH:
   proc aio_fsync*(a1: cint, a2: ptr Taiocb): cint {.importc, header: "<aio.h>".}
   proc aio_read*(a1: ptr Taiocb): cint {.importc, header: "<aio.h>".}
   proc aio_return*(a1: ptr Taiocb): int {.importc, header: "<aio.h>".}
-  proc aio_suspend*(a1: ptr ptr Taiocb, a2: cint, a3: ptr ttimespec): cint {.
+  proc aio_suspend*(a1: ptr ptr Taiocb, a2: cint, a3: ptr Timespec): cint {.
                    importc, header: "<aio.h>".}
   proc aio_write*(a1: ptr Taiocb): cint {.importc, header: "<aio.h>".}
   proc lio_listio*(a1: cint, a2: ptr ptr Taiocb, a3: cint,
-               a4: ptr Tsigevent): cint {.importc, header: "<aio.h>".}
+               a4: ptr SigEvent): cint {.importc, header: "<aio.h>".}
 
 # arpa/inet.h
-proc htonl*(a1: int32): int32 {.importc, header: "<arpa/inet.h>".}
-proc htons*(a1: int16): int16 {.importc, header: "<arpa/inet.h>".}
-proc ntohl*(a1: int32): int32 {.importc, header: "<arpa/inet.h>".}
-proc ntohs*(a1: int16): int16 {.importc, header: "<arpa/inet.h>".}
+proc htonl*(a1: uint32): uint32 {.importc, header: "<arpa/inet.h>".}
+proc htons*(a1: uint16): uint16 {.importc, header: "<arpa/inet.h>".}
+proc ntohl*(a1: uint32): uint32 {.importc, header: "<arpa/inet.h>".}
+proc ntohs*(a1: uint16): uint16 {.importc, header: "<arpa/inet.h>".}
 
-proc inet_addr*(a1: cstring): int32 {.importc, header: "<arpa/inet.h>".}
-proc inet_ntoa*(a1: int32): cstring {.importc, header: "<arpa/inet.h>".}
-proc inet_ntop*(a1: cint, a2: pointer, a3: cstring, a4: int32): cstring {.importc, header: "<arpa/inet.h>".}
-proc inet_pton*(a1: cint, a2: cstring, a3: pointer): cint {.importc, header: "<arpa/inet.h>".}
+when not defined(zephyr):
+  proc inet_addr*(a1: cstring): InAddrT {.importc, header: "<arpa/inet.h>".}
+  proc inet_ntoa*(a1: InAddr): cstring {.importc, header: "<arpa/inet.h>".}
+
+proc inet_ntop*(a1: cint, a2: pointer | ptr InAddr | ptr In6Addr, a3: cstring, a4: int32): cstring {.
+  importc:"(char *)$1", header: "<arpa/inet.h>".}
+proc inet_pton*(a1: cint, a2: cstring, a3: pointer | ptr InAddr | ptr In6Addr): cint {.
+  importc, header: "<arpa/inet.h>".}
 
 var
-  in6addr_any* {.importc, header: "<netinet/in.h>".}: TIn6Addr
-  in6addr_loopback* {.importc, header: "<netinet/in.h>".}: TIn6Addr
+  in6addr_any* {.importc, header: "<netinet/in.h>".}: In6Addr
+  in6addr_loopback* {.importc, header: "<netinet/in.h>".}: In6Addr
 
-proc IN6ADDR_ANY_INIT* (): TIn6Addr {.importc, header: "<netinet/in.h>".}
-proc IN6ADDR_LOOPBACK_INIT* (): TIn6Addr {.importc, header: "<netinet/in.h>".}
+proc IN6ADDR_ANY_INIT* (): In6Addr {.importc, header: "<netinet/in.h>".}
+proc IN6ADDR_LOOPBACK_INIT* (): In6Addr {.importc, header: "<netinet/in.h>".}
 
 # dirent.h
-proc closedir*(a1: ptr TDIR): cint  {.importc, header: "<dirent.h>".}
-proc opendir*(a1: cstring): ptr TDir {.importc, header: "<dirent.h>".}
-proc readdir*(a1: ptr TDIR): ptr TDirent  {.importc, header: "<dirent.h>".}
-proc readdir_r*(a1: ptr TDIR, a2: ptr Tdirent, a3: ptr ptr TDirent): cint  {.
-                importc, header: "<dirent.h>".}
-proc rewinddir*(a1: ptr TDIR)  {.importc, header: "<dirent.h>".}
-proc seekdir*(a1: ptr TDIR, a2: int)  {.importc, header: "<dirent.h>".}
-proc telldir*(a1: ptr TDIR): int {.importc, header: "<dirent.h>".}
+proc closedir*(a1: ptr DIR): cint  {.importc, header: "<dirent.h>".}
+proc opendir*(a1: cstring): ptr DIR {.importc, header: "<dirent.h>", sideEffect.}
+proc readdir*(a1: ptr DIR): ptr Dirent  {.importc, header: "<dirent.h>", sideEffect.}
+proc readdir_r*(a1: ptr DIR, a2: ptr Dirent, a3: ptr ptr Dirent): cint  {.
+                importc, header: "<dirent.h>", sideEffect.}
+proc rewinddir*(a1: ptr DIR)  {.importc, header: "<dirent.h>".}
+proc seekdir*(a1: ptr DIR, a2: int)  {.importc, header: "<dirent.h>".}
+proc telldir*(a1: ptr DIR): int {.importc, header: "<dirent.h>".}
 
 # dlfcn.h
-proc dlclose*(a1: pointer): cint {.importc, header: "<dlfcn.h>".}
-proc dlerror*(): cstring {.importc, header: "<dlfcn.h>".}
-proc dlopen*(a1: cstring, a2: cint): pointer {.importc, header: "<dlfcn.h>".}
-proc dlsym*(a1: pointer, a2: cstring): pointer {.importc, header: "<dlfcn.h>".}
-
-proc creat*(a1: cstring, a2: Tmode): cint {.importc, header: "<fcntl.h>".}
-proc fcntl*(a1: cint, a2: cint): cint {.varargs, importc, header: "<fcntl.h>".}
-proc open*(a1: cstring, a2: cint): cint {.varargs, importc, header: "<fcntl.h>".}
-proc posix_fadvise*(a1: cint, a2, a3: Toff, a4: cint): cint {.importc, header: "<fcntl.h>".}
-proc posix_fallocate*(a1: cint, a2, a3: Toff): cint {.importc, header: "<fcntl.h>".}
-
-proc feclearexcept*(a1: cint): cint {.importc, header: "<fenv.h>".}
-proc fegetexceptflag*(a1: ptr Tfexcept, a2: cint): cint {.importc, header: "<fenv.h>".}
-proc feraiseexcept*(a1: cint): cint {.importc, header: "<fenv.h>".}
-proc fesetexceptflag*(a1: ptr Tfexcept, a2: cint): cint {.importc, header: "<fenv.h>".}
-proc fetestexcept*(a1: cint): cint {.importc, header: "<fenv.h>".}
-proc fegetround*(): cint {.importc, header: "<fenv.h>".}
-proc fesetround*(a1: cint): cint {.importc, header: "<fenv.h>".}
-proc fegetenv*(a1: ptr Tfenv): cint {.importc, header: "<fenv.h>".}
-proc feholdexcept*(a1: ptr Tfenv): cint {.importc, header: "<fenv.h>".}
-proc fesetenv*(a1: ptr Tfenv): cint {.importc, header: "<fenv.h>".}
-proc feupdateenv*(a1: ptr TFenv): cint {.importc, header: "<fenv.h>".}
-
-proc fmtmsg*(a1: int, a2: cstring, a3: cint,
-            a4, a5, a6: cstring): cint {.importc, header: "<fmtmsg.h>".}
-            
+proc dlclose*(a1: pointer): cint {.importc, header: "<dlfcn.h>", sideEffect.}
+proc dlerror*(): cstring {.importc, header: "<dlfcn.h>", sideEffect.}
+proc dlopen*(a1: cstring, a2: cint): pointer {.importc, header: "<dlfcn.h>", sideEffect.}
+proc dlsym*(a1: pointer, a2: cstring): pointer {.importc, header: "<dlfcn.h>", sideEffect.}
+
+proc creat*(a1: cstring, a2: Mode): cint {.importc, header: "<fcntl.h>", sideEffect.}
+proc fcntl*(a1: cint | SocketHandle, a2: cint): cint {.varargs, importc, header: "<fcntl.h>", sideEffect.}
+proc openImpl(a1: cstring, a2: cint): cint {.varargs, importc: "open", header: "<fcntl.h>", sideEffect.}
+proc open*(a1: cstring, a2: cint, mode: Mode | cint = 0.Mode): cint {.inline.} =
+  # prevents bug #17888
+  openImpl(a1, a2, mode)
+
+proc posix_fadvise*(a1: cint, a2, a3: Off, a4: cint): cint {.
+  importc, header: "<fcntl.h>".}
+
+proc ftruncate*(a1: cint, a2: Off): cint {.importc, header: "<unistd.h>".}
+when defined(osx):              # 2001 POSIX evidently does not concern Apple
+  type FStore {.importc: "fstore_t", header: "<fcntl.h>", bycopy.} = object
+    fst_flags: uint32           ## IN: flags word
+    fst_posmode: cint           ## IN: indicates offset field
+    fst_offset,                 ## IN: start of the region
+      fst_length,               ## IN: size of the region
+      fst_bytesalloc: Off       ## OUT: number of bytes allocated
+  var F_PEOFPOSMODE {.importc, header: "<fcntl.h>".}: cint
+  var F_ALLOCATEALL {.importc, header: "<fcntl.h>".}: uint32
+  var F_PREALLOCATE {.importc, header: "<fcntl.h>".}: cint
+  proc posix_fallocate*(a1: cint, a2, a3: Off): cint =
+    var fst = FStore(fst_flags: F_ALLOCATEALL, fst_posmode: F_PEOFPOSMODE,
+                     fst_offset: a2, fst_length: a3)
+    # Must also call ftruncate to match what POSIX does. Unlike posix_fallocate,
+    # this can shrink files.  Could guard w/getFileSize, but caller likely knows
+    # present size & has no good reason to call this unless it is growing.
+    if fcntl(a1, F_PREALLOCATE, fst.addr) != cint(-1): ftruncate(a1, a2 + a3)
+    else: cint(-1)
+else:
+  proc posix_fallocate*(a1: cint, a2, a3: Off): cint {.
+    importc, header: "<fcntl.h>".}
+
+when not defined(haiku) and not defined(openbsd):
+  proc fmtmsg*(a1: int, a2: cstring, a3: cint,
+              a4, a5, a6: cstring): cint {.importc, header: "<fmtmsg.h>".}
+
 proc fnmatch*(a1, a2: cstring, a3: cint): cint {.importc, header: "<fnmatch.h>".}
-proc ftw*(a1: cstring, 
-         a2: proc (x1: cstring, x2: ptr TStat, x3: cint): cint {.noconv.},
+proc ftw*(a1: cstring,
+         a2: proc (x1: cstring, x2: ptr Stat, x3: cint): cint {.noconv.},
          a3: cint): cint {.importc, header: "<ftw.h>".}
-proc nftw*(a1: cstring, 
-          a2: proc (x1: cstring, x2: ptr TStat, x3: cint, x4: ptr TFTW): cint {.noconv.},
-          a3: cint,
-          a4: cint): cint {.importc, header: "<ftw.h>".}
+when not (defined(linux) and defined(amd64)) and not defined(nintendoswitch):
+  proc nftw*(a1: cstring,
+            a2: proc (x1: cstring, x2: ptr Stat,
+                      x3: cint, x4: ptr FTW): cint {.noconv.},
+            a3: cint,
+            a4: cint): cint {.importc, header: "<ftw.h>".}
 
 proc glob*(a1: cstring, a2: cint,
           a3: proc (x1: cstring, x2: cint): cint {.noconv.},
-          a4: ptr Tglob): cint {.importc, header: "<glob.h>".}
-proc globfree*(a1: ptr TGlob) {.importc, header: "<glob.h>".}
-
-proc getgrgid*(a1: TGid): ptr TGroup {.importc, header: "<grp.h>".}
-proc getgrnam*(a1: cstring): ptr TGroup {.importc, header: "<grp.h>".}
-proc getgrgid_r*(a1: Tgid, a2: ptr TGroup, a3: cstring, a4: int,
-                 a5: ptr ptr TGroup): cint {.importc, header: "<grp.h>".}
-proc getgrnam_r*(a1: cstring, a2: ptr TGroup, a3: cstring, 
-                  a4: int, a5: ptr ptr TGroup): cint {.importc, header: "<grp.h>".}
-proc getgrent*(): ptr TGroup {.importc, header: "<grp.h>".}
+          a4: ptr Glob): cint {.importc, header: "<glob.h>", sideEffect.}
+  ## Filename globbing. Use `os.walkPattern() <os.html#glob_1>`_ and similar.
+
+proc globfree*(a1: ptr Glob) {.importc, header: "<glob.h>".}
+
+proc getgrgid*(a1: Gid): ptr Group {.importc, header: "<grp.h>".}
+proc getgrnam*(a1: cstring): ptr Group {.importc, header: "<grp.h>".}
+proc getgrgid_r*(a1: Gid, a2: ptr Group, a3: cstring, a4: int,
+                 a5: ptr ptr Group): cint {.importc, header: "<grp.h>".}
+proc getgrnam_r*(a1: cstring, a2: ptr Group, a3: cstring,
+                  a4: int, a5: ptr ptr Group): cint {.
+                 importc, header: "<grp.h>".}
+proc getgrent*(): ptr Group {.importc, header: "<grp.h>".}
 proc endgrent*() {.importc, header: "<grp.h>".}
 proc setgrent*() {.importc, header: "<grp.h>".}
 
 
-proc iconv_open*(a1, a2: cstring): TIconv {.importc, header: "<iconv.h>".}
-proc iconv*(a1: Ticonv, a2: var cstring, a3: var int, a4: var cstring,
+proc iconv_open*(a1, a2: cstring): Iconv {.importc, header: "<iconv.h>".}
+proc iconv*(a1: Iconv, a2: var cstring, a3: var int, a4: var cstring,
             a5: var int): int {.importc, header: "<iconv.h>".}
-proc iconv_close*(a1: Ticonv): cint {.importc, header: "<iconv.h>".}
+proc iconv_close*(a1: Iconv): cint {.importc, header: "<iconv.h>".}
 
-proc nl_langinfo*(a1: Tnl_item): cstring {.importc, header: "<langinfo.h>".}
+proc nl_langinfo*(a1: Nl_item): cstring {.importc, header: "<langinfo.h>".}
 
 proc basename*(a1: cstring): cstring {.importc, header: "<libgen.h>".}
 proc dirname*(a1: cstring): cstring {.importc, header: "<libgen.h>".}
 
-proc localeconv*(): ptr Tlconv {.importc, header: "<locale.h>".}
+proc localeconv*(): ptr Lconv {.importc, header: "<locale.h>".}
 proc setlocale*(a1: cint, a2: cstring): cstring {.
-                importc, header: "<locale.h>".}
+                importc, header: "<locale.h>", sideEffect.}
 
 proc strfmon*(a1: cstring, a2: int, a3: cstring): int {.varargs,
    importc, header: "<monetary.h>".}
 
-proc mq_close*(a1: Tmqd): cint {.importc, header: "<mqueue.h>".}
-proc mq_getattr*(a1: Tmqd, a2: ptr Tmq_attr): cint {.importc, header: "<mqueue.h>".}
-proc mq_notify*(a1: Tmqd, a2: ptr Tsigevent): cint {.importc, header: "<mqueue.h>".}
-proc mq_open*(a1: cstring, a2: cint): TMqd {.varargs, importc, header: "<mqueue.h>".}
-proc mq_receive*(a1: Tmqd, a2: cstring, a3: int, a4: var int): int {.importc, header: "<mqueue.h>".}
-proc mq_send*(a1: Tmqd, a2: cstring, a3: int, a4: int): cint {.importc, header: "<mqueue.h>".}
-proc mq_setattr*(a1: Tmqd, a2, a3: ptr Tmq_attr): cint {.importc, header: "<mqueue.h>".}
-
-proc mq_timedreceive*(a1: Tmqd, a2: cstring, a3: int, a4: int, 
-                      a5: ptr TTimespec): int {.importc, header: "<mqueue.h>".}
-proc mq_timedsend*(a1: Tmqd, a2: cstring, a3: int, a4: int, 
-                   a5: ptr TTimeSpec): cint {.importc, header: "<mqueue.h>".}
-proc mq_unlink*(a1: cstring): cint {.importc, header: "<mqueue.h>".}
-
-
-proc getpwnam*(a1: cstring): ptr TPasswd {.importc, header: "<pwd.h>".}
-proc getpwuid*(a1: Tuid): ptr TPasswd {.importc, header: "<pwd.h>".}
-proc getpwnam_r*(a1: cstring, a2: ptr Tpasswd, a3: cstring, a4: int,
-                 a5: ptr ptr Tpasswd): cint {.importc, header: "<pwd.h>".}
-proc getpwuid_r*(a1: Tuid, a2: ptr Tpasswd, a3: cstring,
-      a4: int, a5: ptr ptr Tpasswd): cint {.importc, header: "<pwd.h>".}
+when not (defined(nintendoswitch) or defined(macos) or defined(macosx)):
+  proc mq_notify*(mqdes: Mqd, event: ptr SigEvent): cint {.
+    importc, header: "<mqueue.h>".}
+
+  proc mq_open*(name: cstring, flags: cint): Mqd {.
+    varargs, importc, header: "<mqueue.h>".}
+
+  proc mq_close*(mqdes: Mqd): cint {.importc, header: "<mqueue.h>".}
+
+  proc mq_receive*(
+    mqdes: Mqd,
+    buffer: cstring,
+    length: csize_t,
+    priority: var cuint
+  ): int {.importc, header: "<mqueue.h>".}
+
+  proc mq_timedreceive*(
+    mqdes: Mqd,
+    buffer: cstring,
+    length: csize_t,
+    priority: cuint,
+    timeout: ptr Timespec
+  ): int {.importc, header: "<mqueue.h>".}
+
+  proc mq_send*(
+    mqdes: Mqd,
+    buffer: cstring,
+    length: csize_t,
+    priority: cuint
+  ): cint {.importc, header: "<mqueue.h>".}
+
+  proc mq_timedsend*(
+    mqdes: Mqd,
+    buffer: cstring,
+    length: csize_t,
+    priority: cuint,
+    timeout: ptr Timespec
+  ): cint {.importc, header: "<mqueue.h>".}
+
+  proc mq_getattr*(mqdes: Mqd, attribute: ptr MqAttr): cint {.
+    importc, header: "<mqueue.h>".}
+
+  proc mq_setattr*(mqdes: Mqd, newAttribute, oldAttribute: ptr MqAttr): cint {.
+    importc, header: "<mqueue.h>".}
+
+  proc mq_unlink*(mqdes: cstring): cint {.importc, header: "<mqueue.h>".}
+
+
+proc getpwnam*(a1: cstring): ptr Passwd {.importc, header: "<pwd.h>".}
+proc getpwuid*(a1: Uid): ptr Passwd {.importc, header: "<pwd.h>".}
+proc getpwnam_r*(a1: cstring, a2: ptr Passwd, a3: cstring, a4: int,
+                 a5: ptr ptr Passwd): cint {.importc, header: "<pwd.h>".}
+proc getpwuid_r*(a1: Uid, a2: ptr Passwd, a3: cstring,
+      a4: int, a5: ptr ptr Passwd): cint {.importc, header: "<pwd.h>".}
 proc endpwent*() {.importc, header: "<pwd.h>".}
-proc getpwent*(): ptr TPasswd {.importc, header: "<pwd.h>".}
+proc getpwent*(): ptr Passwd {.importc, header: "<pwd.h>".}
 proc setpwent*() {.importc, header: "<pwd.h>".}
 
-proc uname*(a1: var Tutsname): cint {.importc, header: "<sys/utsname.h>".}
+proc uname*(a1: var Utsname): cint {.importc, header: "<sys/utsname.h>".}
 
-proc pthread_atfork*(a1, a2, a3: proc {.noconv.}): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_destroy*(a1: ptr Tpthread_attr): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getdetachstate*(a1: ptr Tpthread_attr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getguardsize*(a1: ptr Tpthread_attr, a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getinheritsched*(a1: ptr Tpthread_attr,
+proc strerror*(errnum: cint): cstring {.importc, header: "<string.h>".}
+
+proc pthread_atfork*(a1, a2, a3: proc () {.noconv.}): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_destroy*(a1: ptr Pthread_attr): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_getdetachstate*(a1: ptr Pthread_attr, a2: cint): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_getguardsize*(a1: ptr Pthread_attr, a2: var cint): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_getinheritsched*(a1: ptr Pthread_attr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getschedparam*(a1: ptr Tpthread_attr,
-          a2: ptr Tsched_param): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getschedpolicy*(a1: ptr Tpthread_attr,
+proc pthread_attr_getschedparam*(a1: ptr Pthread_attr,
+          a2: ptr Sched_param): cint {.importc, header: "<pthread.h>".}
+proc pthread_attr_getschedpolicy*(a1: ptr Pthread_attr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getscope*(a1: ptr Tpthread_attr,
+proc pthread_attr_getscope*(a1: ptr Pthread_attr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getstack*(a1: ptr Tpthread_attr,
+proc pthread_attr_getstack*(a1: ptr Pthread_attr,
          a2: var pointer, a3: var int): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getstackaddr*(a1: ptr Tpthread_attr,
+proc pthread_attr_getstackaddr*(a1: ptr Pthread_attr,
           a2: var pointer): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_getstacksize*(a1: ptr Tpthread_attr,
+proc pthread_attr_getstacksize*(a1: ptr Pthread_attr,
           a2: var int): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_init*(a1: ptr Tpthread_attr): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setdetachstate*(a1: ptr Tpthread_attr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setguardsize*(a1: ptr Tpthread_attr, a2: int): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setinheritsched*(a1: ptr Tpthread_attr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setschedparam*(a1: ptr Tpthread_attr,
-          a2: ptr Tsched_param): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setschedpolicy*(a1: ptr Tpthread_attr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setscope*(a1: ptr Tpthread_attr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setstack*(a1: ptr Tpthread_attr, a2: pointer, a3: int): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setstackaddr*(a1: ptr TPthread_attr, a2: pointer): cint {.importc, header: "<pthread.h>".}
-proc pthread_attr_setstacksize*(a1: ptr TPthread_attr, a2: int): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrier_destroy*(a1: ptr Tpthread_barrier): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrier_init*(a1: ptr Tpthread_barrier,
-         a2: ptr Tpthread_barrierattr, a3: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrier_wait*(a1: ptr Tpthread_barrier): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrierattr_destroy*(a1: ptr Tpthread_barrierattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_attr_init*(a1: ptr Pthread_attr): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setdetachstate*(a1: ptr Pthread_attr, a2: cint): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setguardsize*(a1: ptr Pthread_attr, a2: int): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setinheritsched*(a1: ptr Pthread_attr, a2: cint): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setschedparam*(a1: ptr Pthread_attr,
+          a2: ptr Sched_param): cint {.importc, header: "<pthread.h>".}
+proc pthread_attr_setschedpolicy*(a1: ptr Pthread_attr, a2: cint): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setscope*(a1: ptr Pthread_attr, a2: cint): cint {.importc,
+  header: "<pthread.h>".}
+proc pthread_attr_setstack*(a1: ptr Pthread_attr, a2: pointer, a3: int): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setstackaddr*(a1: ptr Pthread_attr, a2: pointer): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_attr_setstacksize*(a1: ptr Pthread_attr, a2: int): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_barrier_destroy*(a1: ptr Pthread_barrier): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_barrier_init*(a1: ptr Pthread_barrier,
+         a2: ptr Pthread_barrierattr, a3: cint): cint {.
+         importc, header: "<pthread.h>".}
+proc pthread_barrier_wait*(a1: ptr Pthread_barrier): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_barrierattr_destroy*(a1: ptr Pthread_barrierattr): cint {.
+  importc, header: "<pthread.h>".}
 proc pthread_barrierattr_getpshared*(
-          a1: ptr Tpthread_barrierattr, a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrierattr_init*(a1: ptr TPthread_barrierattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_barrierattr_setpshared*(a1: ptr TPthread_barrierattr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_cancel*(a1: Tpthread): cint {.importc, header: "<pthread.h>".}
-proc pthread_cleanup_push*(a1: proc (x: pointer) {.noconv.}, a2: pointer) {.importc, header: "<pthread.h>".}
+          a1: ptr Pthread_barrierattr, a2: var cint): cint {.
+          importc, header: "<pthread.h>".}
+proc pthread_barrierattr_init*(a1: ptr Pthread_barrierattr): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_barrierattr_setpshared*(a1: ptr Pthread_barrierattr,
+  a2: cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_cancel*(a1: Pthread): cint {.importc, header: "<pthread.h>".}
+proc pthread_cleanup_push*(a1: proc (x: pointer) {.noconv.}, a2: pointer) {.
+  importc, header: "<pthread.h>".}
 proc pthread_cleanup_pop*(a1: cint) {.importc, header: "<pthread.h>".}
-proc pthread_cond_broadcast*(a1: ptr Tpthread_cond): cint {.importc, header: "<pthread.h>".}
-proc pthread_cond_destroy*(a1: ptr Tpthread_cond): cint {.importc, header: "<pthread.h>".}
-proc pthread_cond_init*(a1: ptr Tpthread_cond,
-          a2: ptr Tpthread_condattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_cond_signal*(a1: ptr Tpthread_cond): cint {.importc, header: "<pthread.h>".}
-proc pthread_cond_timedwait*(a1: ptr Tpthread_cond,
-          a2: ptr Tpthread_mutex, a3: ptr Ttimespec): cint {.importc, header: "<pthread.h>".}
-
-proc pthread_cond_wait*(a1: ptr Tpthread_cond,
-          a2: ptr Tpthread_mutex): cint {.importc, header: "<pthread.h>".}
-proc pthread_condattr_destroy*(a1: ptr Tpthread_condattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_condattr_getclock*(a1: ptr Tpthread_condattr,
-          a2: var Tclockid): cint {.importc, header: "<pthread.h>".}
-proc pthread_condattr_getpshared*(a1: ptr Tpthread_condattr,
+proc pthread_cond_broadcast*(a1: ptr Pthread_cond): cint {.
+  importc, header: "<pthread.h>".}
+proc pthread_cond_destroy*(a1: ptr Pthread_cond): cint {.importc, header: "<pthread.h>".}
+proc pthread_cond_init*(a1: ptr Pthread_cond,
+          a2: ptr Pthread_condattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_cond_signal*(a1: ptr Pthread_cond): cint {.importc, header: "<pthread.h>".}
+proc pthread_cond_timedwait*(a1: ptr Pthread_cond,
+          a2: ptr Pthread_mutex, a3: ptr Timespec): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_cond_wait*(a1: ptr Pthread_cond,
+          a2: ptr Pthread_mutex): cint {.importc, header: "<pthread.h>".}
+proc pthread_condattr_destroy*(a1: ptr Pthread_condattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_condattr_getclock*(a1: ptr Pthread_condattr,
+          a2: var ClockId): cint {.importc, header: "<pthread.h>".}
+proc pthread_condattr_getpshared*(a1: ptr Pthread_condattr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-          
-proc pthread_condattr_init*(a1: ptr TPthread_condattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_condattr_setclock*(a1: ptr TPthread_condattr,a2: Tclockid): cint {.importc, header: "<pthread.h>".}
-proc pthread_condattr_setpshared*(a1: ptr TPthread_condattr, a2: cint): cint {.importc, header: "<pthread.h>".}
 
-proc pthread_create*(a1: ptr Tpthread, a2: ptr Tpthread_attr,
+proc pthread_condattr_init*(a1: ptr Pthread_condattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_condattr_setclock*(a1: ptr Pthread_condattr,a2: ClockId): cint {.importc, header: "<pthread.h>".}
+proc pthread_condattr_setpshared*(a1: ptr Pthread_condattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_create*(a1: ptr Pthread, a2: ptr Pthread_attr,
           a3: proc (x: pointer): pointer {.noconv.}, a4: pointer): cint {.importc, header: "<pthread.h>".}
-proc pthread_detach*(a1: Tpthread): cint {.importc, header: "<pthread.h>".}
-proc pthread_equal*(a1, a2: Tpthread): cint {.importc, header: "<pthread.h>".}
+proc pthread_detach*(a1: Pthread): cint {.importc, header: "<pthread.h>".}
+proc pthread_equal*(a1, a2: Pthread): cint {.importc, header: "<pthread.h>".}
 proc pthread_exit*(a1: pointer) {.importc, header: "<pthread.h>".}
 proc pthread_getconcurrency*(): cint {.importc, header: "<pthread.h>".}
-proc pthread_getcpuclockid*(a1: Tpthread, a2: var Tclockid): cint {.importc, header: "<pthread.h>".}
-proc pthread_getschedparam*(a1: Tpthread,  a2: var cint,
-          a3: ptr Tsched_param): cint {.importc, header: "<pthread.h>".}
-proc pthread_getspecific*(a1: Tpthread_key): pointer {.importc, header: "<pthread.h>".}
-proc pthread_join*(a1: Tpthread, a2: ptr pointer): cint {.importc, header: "<pthread.h>".}
-proc pthread_key_create*(a1: ptr Tpthread_key, a2: proc (x: pointer) {.noconv.}): cint {.importc, header: "<pthread.h>".}
-proc pthread_key_delete*(a1: Tpthread_key): cint {.importc, header: "<pthread.h>".}
-
-proc pthread_mutex_destroy*(a1: ptr Tpthread_mutex): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_getprioceiling*(a1: ptr Tpthread_mutex,
+proc pthread_getcpuclockid*(a1: Pthread, a2: var ClockId): cint {.importc, header: "<pthread.h>".}
+proc pthread_getschedparam*(a1: Pthread,  a2: var cint,
+          a3: ptr Sched_param): cint {.importc, header: "<pthread.h>".}
+proc pthread_getspecific*(a1: Pthread_key): pointer {.importc, header: "<pthread.h>".}
+proc pthread_join*(a1: Pthread, a2: ptr pointer): cint {.importc, header: "<pthread.h>".}
+proc pthread_key_create*(a1: ptr Pthread_key, a2: proc (x: pointer) {.noconv.}): cint {.importc, header: "<pthread.h>".}
+proc pthread_key_delete*(a1: Pthread_key): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_mutex_destroy*(a1: ptr Pthread_mutex): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_getprioceiling*(a1: ptr Pthread_mutex,
          a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_init*(a1: ptr Tpthread_mutex,
-          a2: ptr Tpthread_mutexattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_lock*(a1: ptr Tpthread_mutex): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_setprioceiling*(a1: ptr Tpthread_mutex,a2: cint,
+proc pthread_mutex_init*(a1: ptr Pthread_mutex,
+          a2: ptr Pthread_mutexattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_lock*(a1: ptr Pthread_mutex): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_setprioceiling*(a1: ptr Pthread_mutex,a2: cint,
           a3: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_timedlock*(a1: ptr Tpthread_mutex,
-          a2: ptr Ttimespec): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_trylock*(a1: ptr Tpthread_mutex): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutex_unlock*(a1: ptr Tpthread_mutex): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_destroy*(a1: ptr Tpthread_mutexattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_timedlock*(a1: ptr Pthread_mutex,
+          a2: ptr Timespec): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_trylock*(a1: ptr Pthread_mutex): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutex_unlock*(a1: ptr Pthread_mutex): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_destroy*(a1: ptr Pthread_mutexattr): cint {.importc, header: "<pthread.h>".}
 
 proc pthread_mutexattr_getprioceiling*(
-          a1: ptr Tpthread_mutexattr, a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_getprotocol*(a1: ptr Tpthread_mutexattr,
+          a1: ptr Pthread_mutexattr, a2: var cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_getprotocol*(a1: ptr Pthread_mutexattr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_getpshared*(a1: ptr Tpthread_mutexattr,
+proc pthread_mutexattr_getpshared*(a1: ptr Pthread_mutexattr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_gettype*(a1: ptr Tpthread_mutexattr,
+proc pthread_mutexattr_gettype*(a1: ptr Pthread_mutexattr,
           a2: var cint): cint {.importc, header: "<pthread.h>".}
 
-proc pthread_mutexattr_init*(a1: ptr Tpthread_mutexattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_setprioceiling*(a1: ptr tpthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_setprotocol*(a1: ptr Tpthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_setpshared*(a1: ptr Tpthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_mutexattr_settype*(a1: ptr Tpthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
-
-proc pthread_once*(a1: ptr Tpthread_once, a2: proc {.noconv.}): cint {.importc, header: "<pthread.h>".}
-
-proc pthread_rwlock_destroy*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_init*(a1: ptr Tpthread_rwlock,
-          a2: ptr Tpthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_rdlock*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_timedrdlock*(a1: ptr Tpthread_rwlock,
-          a2: ptr Ttimespec): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_timedwrlock*(a1: ptr Tpthread_rwlock,
-          a2: ptr Ttimespec): cint {.importc, header: "<pthread.h>".}
-
-proc pthread_rwlock_tryrdlock*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_trywrlock*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_unlock*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlock_wrlock*(a1: ptr Tpthread_rwlock): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlockattr_destroy*(a1: ptr Tpthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_init*(a1: ptr Pthread_mutexattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_setprioceiling*(a1: ptr Pthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_setprotocol*(a1: ptr Pthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_setpshared*(a1: ptr Pthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_mutexattr_settype*(a1: ptr Pthread_mutexattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_once*(a1: ptr Pthread_once, a2: proc () {.noconv.}): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_rwlock_destroy*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_init*(a1: ptr Pthread_rwlock,
+          a2: ptr Pthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_rdlock*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_timedrdlock*(a1: ptr Pthread_rwlock,
+          a2: ptr Timespec): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_timedwrlock*(a1: ptr Pthread_rwlock,
+          a2: ptr Timespec): cint {.importc, header: "<pthread.h>".}
+
+proc pthread_rwlock_tryrdlock*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_trywrlock*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_unlock*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlock_wrlock*(a1: ptr Pthread_rwlock): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlockattr_destroy*(a1: ptr Pthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
 proc pthread_rwlockattr_getpshared*(
-          a1: ptr Tpthread_rwlockattr, a2: var cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlockattr_init*(a1: ptr Tpthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
-proc pthread_rwlockattr_setpshared*(a1: ptr Tpthread_rwlockattr, a2: cint): cint {.importc, header: "<pthread.h>".}
+          a1: ptr Pthread_rwlockattr, a2: var cint): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlockattr_init*(a1: ptr Pthread_rwlockattr): cint {.importc, header: "<pthread.h>".}
+proc pthread_rwlockattr_setpshared*(a1: ptr Pthread_rwlockattr, a2: cint): cint {.importc, header: "<pthread.h>".}
 
-proc pthread_self*(): Tpthread {.importc, header: "<pthread.h>".}
+proc pthread_self*(): Pthread {.importc, header: "<pthread.h>".}
 proc pthread_setcancelstate*(a1: cint, a2: var cint): cint {.importc, header: "<pthread.h>".}
 proc pthread_setcanceltype*(a1: cint, a2: var cint): cint {.importc, header: "<pthread.h>".}
 proc pthread_setconcurrency*(a1: cint): cint {.importc, header: "<pthread.h>".}
-proc pthread_setschedparam*(a1: Tpthread, a2: cint,
-          a3: ptr Tsched_param): cint {.importc, header: "<pthread.h>".}
+proc pthread_setschedparam*(a1: Pthread, a2: cint,
+          a3: ptr Sched_param): cint {.importc, header: "<pthread.h>".}
 
-proc pthread_setschedprio*(a1: Tpthread, a2: cint): cint {.
+proc pthread_setschedprio*(a1: Pthread, a2: cint): cint {.
   importc, header: "<pthread.h>".}
-proc pthread_setspecific*(a1: Tpthread_key, a2: pointer): cint {.
+proc pthread_setspecific*(a1: Pthread_key, a2: pointer): cint {.
   importc, header: "<pthread.h>".}
-proc pthread_spin_destroy*(a1: ptr Tpthread_spinlock): cint {.
+proc pthread_spin_destroy*(a1: ptr Pthread_spinlock): cint {.
   importc, header: "<pthread.h>".}
-proc pthread_spin_init*(a1: ptr Tpthread_spinlock, a2: cint): cint {.
+proc pthread_spin_init*(a1: ptr Pthread_spinlock, a2: cint): cint {.
   importc, header: "<pthread.h>".}
-proc pthread_spin_lock*(a1: ptr Tpthread_spinlock): cint {.
+proc pthread_spin_lock*(a1: ptr Pthread_spinlock): cint {.
   importc, header: "<pthread.h>".}
-proc pthread_spin_trylock*(a1: ptr Tpthread_spinlock): cint{.
+proc pthread_spin_trylock*(a1: ptr Pthread_spinlock): cint{.
   importc, header: "<pthread.h>".}
-proc pthread_spin_unlock*(a1: ptr Tpthread_spinlock): cint {.
+proc pthread_spin_unlock*(a1: ptr Pthread_spinlock): cint {.
   importc, header: "<pthread.h>".}
 proc pthread_testcancel*() {.importc, header: "<pthread.h>".}
 
 
+proc exitnow*(code: int) {.importc: "_exit", header: "<unistd.h>".}
 proc access*(a1: cstring, a2: cint): cint {.importc, header: "<unistd.h>".}
 proc alarm*(a1: cint): cint {.importc, header: "<unistd.h>".}
 proc chdir*(a1: cstring): cint {.importc, header: "<unistd.h>".}
-proc chown*(a1: cstring, a2: Tuid, a3: Tgid): cint {.importc, header: "<unistd.h>".}
-proc close*(a1: cint): cint {.importc, header: "<unistd.h>".}
+proc chown*(a1: cstring, a2: Uid, a3: Gid): cint {.importc, header: "<unistd.h>".}
+proc close*(a1: cint | SocketHandle): cint {.importc, header: "<unistd.h>".}
 proc confstr*(a1: cint, a2: cstring, a3: int): int {.importc, header: "<unistd.h>".}
 proc crypt*(a1, a2: cstring): cstring {.importc, header: "<unistd.h>".}
 proc ctermid*(a1: cstring): cstring {.importc, header: "<unistd.h>".}
@@ -1960,392 +516,487 @@ proc dup*(a1: cint): cint {.importc, header: "<unistd.h>".}
 proc dup2*(a1, a2: cint): cint {.importc, header: "<unistd.h>".}
 proc encrypt*(a1: array[0..63, char], a2: cint) {.importc, header: "<unistd.h>".}
 
-proc execl*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>".}
-proc execle*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>".}
-proc execlp*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>".}
-proc execv*(a1: cstring, a2: cstringArray): cint {.importc, header: "<unistd.h>".}
+proc execl*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>", sideEffect.}
+proc execle*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>", sideEffect.}
+proc execlp*(a1, a2: cstring): cint {.varargs, importc, header: "<unistd.h>", sideEffect.}
+proc execv*(a1: cstring, a2: cstringArray): cint {.importc, header: "<unistd.h>", sideEffect.}
 proc execve*(a1: cstring, a2, a3: cstringArray): cint {.
-  importc, header: "<unistd.h>".}
-proc execvp*(a1: cstring, a2: cstringArray): cint {.importc, header: "<unistd.h>".}
-proc fchown*(a1: cint, a2: Tuid, a3: Tgid): cint {.importc, header: "<unistd.h>".}
-proc fchdir*(a1: cint): cint {.importc, header: "<unistd.h>".}
+  importc, header: "<unistd.h>", sideEffect.}
+proc execvp*(a1: cstring, a2: cstringArray): cint {.importc, header: "<unistd.h>", sideEffect.}
+proc execvpe*(a1: cstring, a2: cstringArray, a3: cstringArray): cint {.importc, header: "<unistd.h>", sideEffect.}
+proc fchown*(a1: cint, a2: Uid, a3: Gid): cint {.importc, header: "<unistd.h>", sideEffect.}
+proc fchdir*(a1: cint): cint {.importc, header: "<unistd.h>", sideEffect.}
 proc fdatasync*(a1: cint): cint {.importc, header: "<unistd.h>".}
-proc fork*(): Tpid {.importc, header: "<unistd.h>".}
+proc fork*(): Pid {.importc, header: "<unistd.h>", sideEffect.}
 proc fpathconf*(a1, a2: cint): int {.importc, header: "<unistd.h>".}
 proc fsync*(a1: cint): cint {.importc, header: "<unistd.h>".}
-proc ftruncate*(a1: cint, a2: Toff): cint {.importc, header: "<unistd.h>".}
-proc getcwd*(a1: cstring, a2: int): cstring {.importc, header: "<unistd.h>".}
-proc getegid*(): TGid {.importc, header: "<unistd.h>".}
-proc geteuid*(): TUid {.importc, header: "<unistd.h>".}
-proc getgid*(): TGid {.importc, header: "<unistd.h>".}
+ ## synchronize a file's buffer cache to the storage device
+
+proc getcwd*(a1: cstring, a2: int): cstring {.importc, header: "<unistd.h>", sideEffect.}
+proc getuid*(): Uid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the real user ID of the calling process
+
+proc geteuid*(): Uid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the effective user ID of the calling process
+
+proc getgid*(): Gid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the real group ID of the calling process
+
+proc getegid*(): Gid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the effective group ID of the calling process
 
-proc getgroups*(a1: cint, a2: ptr array[0..255, Tgid]): cint {.
+proc getgroups*(a1: cint, a2: ptr array[0..255, Gid]): cint {.
   importc, header: "<unistd.h>".}
-proc gethostid*(): int {.importc, header: "<unistd.h>".}
-proc gethostname*(a1: cstring, a2: int): cint {.importc, header: "<unistd.h>".}
-proc getlogin*(): cstring {.importc, header: "<unistd.h>".}
-proc getlogin_r*(a1: cstring, a2: int): cint {.importc, header: "<unistd.h>".}
+proc gethostid*(): int {.importc, header: "<unistd.h>", sideEffect.}
+proc gethostname*(a1: cstring, a2: int): cint {.importc, header: "<unistd.h>", sideEffect.}
+proc getlogin*(): cstring {.importc, header: "<unistd.h>", sideEffect.}
+proc getlogin_r*(a1: cstring, a2: int): cint {.importc, header: "<unistd.h>", sideEffect.}
 
 proc getopt*(a1: cint, a2: cstringArray, a3: cstring): cint {.
   importc, header: "<unistd.h>".}
-proc getpgid*(a1: Tpid): Tpid {.importc, header: "<unistd.h>".}
-proc getpgrp*(): Tpid {.importc, header: "<unistd.h>".}
-proc getpid*(): Tpid {.importc, header: "<unistd.h>".}
-proc getppid*(): Tpid {.importc, header: "<unistd.h>".}
-proc getsid*(a1: Tpid): Tpid {.importc, header: "<unistd.h>".}
-proc getuid*(): Tuid {.importc, header: "<unistd.h>".}
+proc getpgid*(a1: Pid): Pid {.importc, header: "<unistd.h>".}
+proc getpgrp*(): Pid {.importc, header: "<unistd.h>".}
+proc getpid*(): Pid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns  the process ID (PID) of the calling process
+
+proc getppid*(): Pid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the process ID of the parent of the calling process
+
+proc getsid*(a1: Pid): Pid {.importc, header: "<unistd.h>", sideEffect.}
+ ## returns the session ID of the calling process
+
 proc getwd*(a1: cstring): cstring {.importc, header: "<unistd.h>".}
 proc isatty*(a1: cint): cint {.importc, header: "<unistd.h>".}
-proc lchown*(a1: cstring, a2: Tuid, a3: Tgid): cint {.importc, header: "<unistd.h>".}
+proc lchown*(a1: cstring, a2: Uid, a3: Gid): cint {.importc, header: "<unistd.h>".}
 proc link*(a1, a2: cstring): cint {.importc, header: "<unistd.h>".}
 
-proc lockf*(a1, a2: cint, a3: Toff): cint {.importc, header: "<unistd.h>".}
-proc lseek*(a1: cint, a2: Toff, a3: cint): Toff {.importc, header: "<unistd.h>".}
+proc lockf*(a1, a2: cint, a3: Off): cint {.importc, header: "<unistd.h>".}
+proc lseek*(a1: cint, a2: Off, a3: cint): Off {.importc, header: "<unistd.h>".}
 proc nice*(a1: cint): cint {.importc, header: "<unistd.h>".}
 proc pathconf*(a1: cstring, a2: cint): int {.importc, header: "<unistd.h>".}
 
 proc pause*(): cint {.importc, header: "<unistd.h>".}
+proc pclose*(a: File): cint {.importc, header: "<stdio.h>".}
 proc pipe*(a: array[0..1, cint]): cint {.importc, header: "<unistd.h>".}
-proc pread*(a1: cint, a2: pointer, a3: int, a4: Toff): int {.
+proc popen*(a1, a2: cstring): File {.importc, header: "<stdio.h>".}
+proc pread*(a1: cint, a2: pointer, a3: int, a4: Off): int {.
   importc, header: "<unistd.h>".}
-proc pwrite*(a1: cint, a2: pointer, a3: int, a4: Toff): int {.
+proc pwrite*(a1: cint, a2: pointer, a3: int, a4: Off): int {.
   importc, header: "<unistd.h>".}
 proc read*(a1: cint, a2: pointer, a3: int): int {.importc, header: "<unistd.h>".}
-proc readlink*(a1, a2: cstring, a3: int): int {.importc, header: "<unistd.h>".}
+when not defined(nintendoswitch):
+  proc readlink*(a1, a2: cstring, a3: int): int {.importc, header: "<unistd.h>".}
+proc ioctl*(f: FileHandle, device: uint): int {.importc: "ioctl",
+      header: "<sys/ioctl.h>", varargs, tags: [WriteIOEffect].}
+  ## A system call for device-specific input/output operations and other
+  ## operations which cannot be expressed by regular system calls
 
 proc rmdir*(a1: cstring): cint {.importc, header: "<unistd.h>".}
-proc setegid*(a1: Tgid): cint {.importc, header: "<unistd.h>".}
-proc seteuid*(a1: Tuid): cint {.importc, header: "<unistd.h>".}
-proc setgid*(a1: Tgid): cint {.importc, header: "<unistd.h>".}
-
-proc setpgid*(a1, a2: Tpid): cint {.importc, header: "<unistd.h>".}
-proc setpgrp*(): Tpid {.importc, header: "<unistd.h>".}
-proc setregid*(a1, a2: Tgid): cint {.importc, header: "<unistd.h>".}
-proc setreuid*(a1, a2: Tuid): cint {.importc, header: "<unistd.h>".}
-proc setsid*(): Tpid {.importc, header: "<unistd.h>".}
-proc setuid*(a1: Tuid): cint {.importc, header: "<unistd.h>".}
+proc setegid*(a1: Gid): cint {.importc, header: "<unistd.h>".}
+proc seteuid*(a1: Uid): cint {.importc, header: "<unistd.h>".}
+proc setgid*(a1: Gid): cint {.importc, header: "<unistd.h>".}
+
+proc setpgid*(a1, a2: Pid): cint {.importc, header: "<unistd.h>".}
+proc setpgrp*(): Pid {.importc, header: "<unistd.h>".}
+proc setregid*(a1, a2: Gid): cint {.importc, header: "<unistd.h>".}
+proc setreuid*(a1, a2: Uid): cint {.importc, header: "<unistd.h>".}
+proc setsid*(): Pid {.importc, header: "<unistd.h>".}
+proc setuid*(a1: Uid): cint {.importc, header: "<unistd.h>".}
 proc sleep*(a1: cint): cint {.importc, header: "<unistd.h>".}
 proc swab*(a1, a2: pointer, a3: int) {.importc, header: "<unistd.h>".}
-proc symlink*(a1, a2: cstring): cint {.importc, header: "<unistd.h>".}
+when not defined(nintendoswitch):
+  proc symlink*(a1, a2: cstring): cint {.importc, header: "<unistd.h>".}
+else:
+  proc symlink*(a1, a2: cstring): cint = -1
 proc sync*() {.importc, header: "<unistd.h>".}
 proc sysconf*(a1: cint): int {.importc, header: "<unistd.h>".}
-proc tcgetpgrp*(a1: cint): tpid {.importc, header: "<unistd.h>".}
-proc tcsetpgrp*(a1: cint, a2: Tpid): cint {.importc, header: "<unistd.h>".}
-proc truncate*(a1: cstring, a2: Toff): cint {.importc, header: "<unistd.h>".}
+proc tcgetpgrp*(a1: cint): Pid {.importc, header: "<unistd.h>".}
+proc tcsetpgrp*(a1: cint, a2: Pid): cint {.importc, header: "<unistd.h>".}
+proc truncate*(a1: cstring, a2: Off): cint {.importc, header: "<unistd.h>".}
 proc ttyname*(a1: cint): cstring {.importc, header: "<unistd.h>".}
 proc ttyname_r*(a1: cint, a2: cstring, a3: int): cint {.
   importc, header: "<unistd.h>".}
-proc ualarm*(a1, a2: Tuseconds): Tuseconds {.importc, header: "<unistd.h>".}
+proc ualarm*(a1, a2: Useconds): Useconds {.importc, header: "<unistd.h>".}
 proc unlink*(a1: cstring): cint {.importc, header: "<unistd.h>".}
-proc usleep*(a1: Tuseconds): cint {.importc, header: "<unistd.h>".}
-proc vfork*(): tpid {.importc, header: "<unistd.h>".}
+proc usleep*(a1: Useconds): cint {.importc, header: "<unistd.h>".}
+proc vfork*(): Pid {.importc, header: "<unistd.h>".}
 proc write*(a1: cint, a2: pointer, a3: int): int {.importc, header: "<unistd.h>".}
 
-proc sem_close*(a1: ptr Tsem): cint {.importc, header: "<semaphore.h>".}
-proc sem_destroy*(a1: ptr Tsem): cint {.importc, header: "<semaphore.h>".}
-proc sem_getvalue*(a1: ptr Tsem, a2: var cint): cint {.
+proc sem_close*(a1: ptr Sem): cint {.importc, header: "<semaphore.h>".}
+proc sem_destroy*(a1: ptr Sem): cint {.importc, header: "<semaphore.h>".}
+proc sem_getvalue*(a1: ptr Sem, a2: var cint): cint {.
   importc, header: "<semaphore.h>".}
-proc sem_init*(a1: ptr Tsem, a2: cint, a3: cint): cint {.
+proc sem_init*(a1: ptr Sem, a2: cint, a3: cint): cint {.
   importc, header: "<semaphore.h>".}
-proc sem_open*(a1: cstring, a2: cint): ptr TSem {.
+proc sem_open*(a1: cstring, a2: cint): ptr Sem {.
   varargs, importc, header: "<semaphore.h>".}
-proc sem_post*(a1: ptr Tsem): cint {.importc, header: "<semaphore.h>".}
-proc sem_timedwait*(a1: ptr Tsem, a2: ptr Ttimespec): cint {.
+proc sem_post*(a1: ptr Sem): cint {.importc, header: "<semaphore.h>".}
+proc sem_timedwait*(a1: ptr Sem, a2: ptr Timespec): cint {.
   importc, header: "<semaphore.h>".}
-proc sem_trywait*(a1: ptr Tsem): cint {.importc, header: "<semaphore.h>".}
+proc sem_trywait*(a1: ptr Sem): cint {.importc, header: "<semaphore.h>".}
 proc sem_unlink*(a1: cstring): cint {.importc, header: "<semaphore.h>".}
-proc sem_wait*(a1: ptr Tsem): cint {.importc, header: "<semaphore.h>".}
+proc sem_wait*(a1: ptr Sem): cint {.importc, header: "<semaphore.h>".}
 
-proc ftok*(a1: cstring, a2: cint): Tkey {.importc, header: "<sys/ipc.h>".}
+proc ftok*(a1: cstring, a2: cint): Key {.importc, header: "<sys/ipc.h>".}
 
-proc statvfs*(a1: cstring, a2: var Tstatvfs): cint {.
+proc statvfs*(a1: cstring, a2: var Statvfs): cint {.
   importc, header: "<sys/statvfs.h>".}
-proc fstatvfs*(a1: cint, a2: var Tstatvfs): cint {.
+proc fstatvfs*(a1: cint, a2: var Statvfs): cint {.
   importc, header: "<sys/statvfs.h>".}
 
-proc chmod*(a1: cstring, a2: TMode): cint {.importc, header: "<sys/stat.h>".}
-proc fchmod*(a1: cint, a2: TMode): cint {.importc, header: "<sys/stat.h>".}
-proc fstat*(a1: cint, a2: var Tstat): cint {.importc, header: "<sys/stat.h>".}
-proc lstat*(a1: cstring, a2: var Tstat): cint {.importc, header: "<sys/stat.h>".}
-proc mkdir*(a1: cstring, a2: TMode): cint {.importc, header: "<sys/stat.h>".}
-proc mkfifo*(a1: cstring, a2: TMode): cint {.importc, header: "<sys/stat.h>".}
-proc mknod*(a1: cstring, a2: TMode, a3: Tdev): cint {.
+proc chmod*(a1: cstring, a2: Mode): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+when defined(osx) or defined(freebsd):
+  proc lchmod*(a1: cstring, a2: Mode): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+proc fchmod*(a1: cint, a2: Mode): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+proc fstat*(a1: cint, a2: var Stat): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+proc lstat*(a1: cstring, a2: var Stat): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+proc mkdir*(a1: cstring, a2: Mode): cint {.importc, header: "<sys/stat.h>", sideEffect.}
+  ## Use `os.createDir() <os.html#createDir,string>`_ and similar.
+
+proc mkfifo*(a1: cstring, a2: Mode): cint {.importc, header: "<sys/stat.h>".}
+proc mknod*(a1: cstring, a2: Mode, a3: Dev): cint {.
   importc, header: "<sys/stat.h>".}
-proc stat*(a1: cstring, a2: var Tstat): cint {.importc, header: "<sys/stat.h>".}
-proc umask*(a1: Tmode): TMode {.importc, header: "<sys/stat.h>".}
+proc stat*(a1: cstring, a2: var Stat): cint {.importc, header: "<sys/stat.h>".}
+proc umask*(a1: Mode): Mode {.importc, header: "<sys/stat.h>".}
 
-proc S_ISBLK*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISBLK*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a block special file.
-proc S_ISCHR*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISCHR*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a character special file.
-proc S_ISDIR*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISDIR*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a directory.
-proc S_ISFIFO*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISFIFO*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a pipe or FIFO special file.
-proc S_ISREG*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISREG*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a regular file.
-proc S_ISLNK*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISLNK*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a symbolic link.
-proc S_ISSOCK*(m: Tmode): bool {.importc, header: "<sys/stat.h>".}
-  ## Test for a socket. 
-    
-proc S_TYPEISMQ*(buf: var TStat): bool {.importc, header: "<sys/stat.h>".}
+proc S_ISSOCK*(m: Mode): bool {.importc, header: "<sys/stat.h>".}
+  ## Test for a socket.
+
+proc S_TYPEISMQ*(buf: var Stat): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a message queue.
-proc S_TYPEISSEM*(buf: var TStat): bool {.importc, header: "<sys/stat.h>".}
+proc S_TYPEISSEM*(buf: var Stat): bool {.importc, header: "<sys/stat.h>".}
   ## Test for a semaphore.
-proc S_TYPEISSHM*(buf: var TStat): bool {.importc, header: "<sys/stat.h>".}
-  ## Test for a shared memory object. 
-    
-proc S_TYPEISTMO*(buf: var TStat): bool {.importc, header: "<sys/stat.h>".}
-  ## Test macro for a typed memory object. 
-  
+proc S_TYPEISSHM*(buf: var Stat): bool {.importc, header: "<sys/stat.h>".}
+  ## Test for a shared memory object.
+
+proc S_TYPEISTMO*(buf: var Stat): bool {.importc, header: "<sys/stat.h>".}
+  ## Test macro for a typed memory object.
+
 proc mlock*(a1: pointer, a2: int): cint {.importc, header: "<sys/mman.h>".}
 proc mlockall*(a1: cint): cint {.importc, header: "<sys/mman.h>".}
-proc mmap*(a1: pointer, a2: int, a3, a4, a5: cint, a6: Toff): pointer {.
+proc mmap*(a1: pointer, a2: int, a3, a4, a5: cint, a6: Off): pointer {.
   importc, header: "<sys/mman.h>".}
 proc mprotect*(a1: pointer, a2: int, a3: cint): cint {.
   importc, header: "<sys/mman.h>".}
 proc msync*(a1: pointer, a2: int, a3: cint): cint {.importc, header: "<sys/mman.h>".}
+
 proc munlock*(a1: pointer, a2: int): cint {.importc, header: "<sys/mman.h>".}
 proc munlockall*(): cint {.importc, header: "<sys/mman.h>".}
 proc munmap*(a1: pointer, a2: int): cint {.importc, header: "<sys/mman.h>".}
 proc posix_madvise*(a1: pointer, a2: int, a3: cint): cint {.
   importc, header: "<sys/mman.h>".}
-proc posix_mem_offset*(a1: pointer, a2: int, a3: var Toff,
+proc posix_mem_offset*(a1: pointer, a2: int, a3: var Off,
            a4: var int, a5: var cint): cint {.importc, header: "<sys/mman.h>".}
-proc posix_typed_mem_get_info*(a1: cint, 
-  a2: var Tposix_typed_mem_info): cint {.importc, header: "<sys/mman.h>".}
+when not (defined(linux) and defined(amd64)) and not defined(nintendoswitch) and
+     not defined(haiku):
+  proc posix_typed_mem_get_info*(a1: cint,
+    a2: var Posix_typed_mem_info): cint {.importc, header: "<sys/mman.h>".}
 proc posix_typed_mem_open*(a1: cstring, a2, a3: cint): cint {.
   importc, header: "<sys/mman.h>".}
-proc shm_open*(a1: cstring, a2: cint, a3: Tmode): cint {.
+proc shm_open*(a1: cstring, a2: cint, a3: Mode): cint {.
   importc, header: "<sys/mman.h>".}
 proc shm_unlink*(a1: cstring): cint {.importc, header: "<sys/mman.h>".}
 
-proc asctime*(a1: var ttm): cstring{.importc, header: "<time.h>".}
-
-proc asctime_r*(a1: var ttm, a2: cstring): cstring {.importc, header: "<time.h>".}
-proc clock*(): Tclock {.importc, header: "<time.h>".}
-proc clock_getcpuclockid*(a1: tpid, a2: var Tclockid): cint {.
-  importc, header: "<time.h>".}
-proc clock_getres*(a1: Tclockid, a2: var Ttimespec): cint {.
-  importc, header: "<time.h>".}
-proc clock_gettime*(a1: Tclockid, a2: var Ttimespec): cint {.
-  importc, header: "<time.h>".}
-proc clock_nanosleep*(a1: Tclockid, a2: cint, a3: var Ttimespec,
-               a4: var Ttimespec): cint {.importc, header: "<time.h>".}
-proc clock_settime*(a1: Tclockid, a2: var Ttimespec): cint {.
-  importc, header: "<time.h>".}
-
-proc ctime*(a1: var Ttime): cstring {.importc, header: "<time.h>".}
-proc ctime_r*(a1: var Ttime, a2: cstring): cstring {.importc, header: "<time.h>".}
-proc difftime*(a1, a2: Ttime): cdouble {.importc, header: "<time.h>".}
-proc getdate*(a1: cstring): ptr ttm {.importc, header: "<time.h>".}
-
-proc gmtime*(a1: var ttime): ptr ttm {.importc, header: "<time.h>".}
-proc gmtime_r*(a1: var ttime, a2: var ttm): ptr ttm {.importc, header: "<time.h>".}
-proc localtime*(a1: var ttime): ptr ttm {.importc, header: "<time.h>".}
-proc localtime_r*(a1: var ttime, a2: var ttm): ptr ttm {.importc, header: "<time.h>".}
-proc mktime*(a1: var ttm): ttime  {.importc, header: "<time.h>".}
-proc nanosleep*(a1, a2: var Ttimespec): cint {.importc, header: "<time.h>".}
+proc asctime*(a1: var Tm): cstring{.importc, header: "<time.h>".}
+
+proc asctime_r*(a1: var Tm, a2: cstring): cstring {.importc, header: "<time.h>".}
+proc clock*(): Clock {.importc, header: "<time.h>", sideEffect.}
+proc clock_getcpuclockid*(a1: Pid, a2: var ClockId): cint {.
+  importc, header: "<time.h>", sideEffect.}
+proc clock_getres*(a1: ClockId, a2: var Timespec): cint {.
+  importc, header: "<time.h>", sideEffect.}
+proc clock_gettime*(a1: ClockId, a2: var Timespec): cint {.
+  importc, header: "<time.h>", sideEffect.}
+proc clock_nanosleep*(a1: ClockId, a2: cint, a3: var Timespec,
+               a4: var Timespec): cint {.importc, header: "<time.h>", sideEffect.}
+proc clock_settime*(a1: ClockId, a2: var Timespec): cint {.
+  importc, header: "<time.h>", sideEffect.}
+
+proc `==`*(a, b: Time): bool {.borrow.}
+proc `-`*(a, b: Time): Time {.borrow.}
+proc ctime*(a1: var Time): cstring {.importc, header: "<time.h>".}
+proc ctime_r*(a1: var Time, a2: cstring): cstring {.importc, header: "<time.h>".}
+proc difftime*(a1, a2: Time): cdouble {.importc, header: "<time.h>".}
+proc getdate*(a1: cstring): ptr Tm {.importc, header: "<time.h>".}
+proc gmtime*(a1: var Time): ptr Tm {.importc, header: "<time.h>".}
+proc gmtime_r*(a1: var Time, a2: var Tm): ptr Tm {.importc, header: "<time.h>".}
+proc localtime*(a1: var Time): ptr Tm {.importc, header: "<time.h>".}
+proc localtime_r*(a1: var Time, a2: var Tm): ptr Tm {.importc, header: "<time.h>".}
+proc mktime*(a1: var Tm): Time  {.importc, header: "<time.h>".}
+proc timegm*(a1: var Tm): Time  {.importc, header: "<time.h>".}
+proc nanosleep*(a1, a2: var Timespec): cint {.importc, header: "<time.h>", sideEffect.}
 proc strftime*(a1: cstring, a2: int, a3: cstring,
-           a4: var ttm): int {.importc, header: "<time.h>".}
-proc strptime*(a1, a2: cstring, a3: var ttm): cstring {.importc, header: "<time.h>".}
-proc time*(a1: var Ttime): ttime {.importc, header: "<time.h>".}
-proc timer_create*(a1: var Tclockid, a2: var Tsigevent,
-               a3: var Ttimer): cint {.importc, header: "<time.h>".}
-proc timer_delete*(a1: var Ttimer): cint {.importc, header: "<time.h>".}
-proc timer_gettime*(a1: Ttimer, a2: var Titimerspec): cint {.
+           a4: var Tm): int {.importc, header: "<time.h>".}
+proc strptime*(a1, a2: cstring, a3: var Tm): cstring {.importc, header: "<time.h>".}
+proc time*(a1: var Time): Time {.importc, header: "<time.h>", sideEffect.}
+proc timer_create*(a1: ClockId, a2: var SigEvent,
+               a3: var Timer): cint {.importc, header: "<time.h>".}
+proc timer_delete*(a1: Timer): cint {.importc, header: "<time.h>".}
+proc timer_gettime*(a1: Timer, a2: var Itimerspec): cint {.
   importc, header: "<time.h>".}
-proc timer_getoverrun*(a1: Ttimer): cint {.importc, header: "<time.h>".}
-proc timer_settime*(a1: Ttimer, a2: cint, a3: var Titimerspec,
-               a4: var titimerspec): cint {.importc, header: "<time.h>".}
+proc timer_getoverrun*(a1: Timer): cint {.importc, header: "<time.h>".}
+proc timer_settime*(a1: Timer, a2: cint, a3: var Itimerspec,
+               a4: var Itimerspec): cint {.importc, header: "<time.h>".}
 proc tzset*() {.importc, header: "<time.h>".}
 
 
-proc wait*(a1: var cint): tpid {.importc, header: "<sys/wait.h>".}
-proc waitid*(a1: cint, a2: tid, a3: var Tsiginfo, a4: cint): cint {.
-  importc, header: "<sys/wait.h>".}
-proc waitpid*(a1: tpid, a2: var cint, a3: cint): tpid  {.
-  importc, header: "<sys/wait.h>".}
+proc wait*(a1: ptr cint): Pid {.importc, discardable, header: "<sys/wait.h>", sideEffect.}
+proc waitid*(a1: cint, a2: Id, a3: var SigInfo, a4: cint): cint {.
+  importc, header: "<sys/wait.h>", sideEffect.}
+proc waitpid*(a1: Pid, a2: var cint, a3: cint): Pid {.
+  importc, header: "<sys/wait.h>", sideEffect.}
+
+type Rusage* {.importc: "struct rusage", header: "<sys/resource.h>",
+               bycopy.} = object
+  ru_utime*, ru_stime*: Timeval                       # User and system time
+  ru_maxrss*, ru_ixrss*, ru_idrss*, ru_isrss*,        # memory sizes
+    ru_minflt*, ru_majflt*, ru_nswap*,                # paging activity
+    ru_inblock*, ru_oublock*, ru_msgsnd*, ru_msgrcv*, # IO activity
+    ru_nsignals*, ru_nvcsw*, ru_nivcsw*: clong        # switching activity
+
+proc wait4*(pid: Pid, status: ptr cint, options: cint, rusage: ptr Rusage): Pid
+  {.importc, header: "<sys/wait.h>", sideEffect.}
+
+const
+  RUSAGE_SELF* = cint(0)
+  RUSAGE_CHILDREN* = cint(-1)
+  RUSAGE_THREAD* = cint(1)    # This one is less std; Linux, BSD agree though.
+
+# This can only fail if `who` is invalid or `rusage` ptr is invalid.
+proc getrusage*(who: cint, rusage: ptr Rusage): cint
+  {.importc, header: "<sys/resource.h>", discardable.}
 
 proc bsd_signal*(a1: cint, a2: proc (x: pointer) {.noconv.}) {.
   importc, header: "<signal.h>".}
-proc kill*(a1: Tpid, a2: cint): cint {.importc, header: "<signal.h>".}
-proc killpg*(a1: Tpid, a2: cint): cint {.importc, header: "<signal.h>".}
-proc pthread_kill*(a1: tpthread, a2: cint): cint {.importc, header: "<signal.h>".}
-proc pthread_sigmask*(a1: cint, a2, a3: var Tsigset): cint {.
+proc kill*(a1: Pid, a2: cint): cint {.importc, header: "<signal.h>", sideEffect.}
+proc killpg*(a1: Pid, a2: cint): cint {.importc, header: "<signal.h>", sideEffect.}
+proc pthread_kill*(a1: Pthread, a2: cint): cint {.importc, header: "<signal.h>".}
+proc pthread_sigmask*(a1: cint, a2, a3: var Sigset): cint {.
   importc, header: "<signal.h>".}
 proc `raise`*(a1: cint): cint {.importc, header: "<signal.h>".}
-proc sigaction*(a1: cint, a2, a3: var Tsigaction): cint {.
+proc sigaction*(a1: cint, a2, a3: var Sigaction): cint {.
   importc, header: "<signal.h>".}
-proc sigaddset*(a1: var Tsigset, a2: cint): cint {.importc, header: "<signal.h>".}
-proc sigaltstack*(a1, a2: var Tstack): cint {.importc, header: "<signal.h>".}
-proc sigdelset*(a1: var Tsigset, a2: cint): cint {.importc, header: "<signal.h>".}
-proc sigemptyset*(a1: var Tsigset): cint {.importc, header: "<signal.h>".}
-proc sigfillset*(a1: var Tsigset): cint {.importc, header: "<signal.h>".}
+
+proc sigaction*(a1: cint, a2: var Sigaction; a3: ptr Sigaction = nil): cint {.
+  importc, header: "<signal.h>".}
+
+proc sigaddset*(a1: var Sigset, a2: cint): cint {.importc, header: "<signal.h>".}
+proc sigaltstack*(a1, a2: var Stack): cint {.importc, header: "<signal.h>".}
+proc sigdelset*(a1: var Sigset, a2: cint): cint {.importc, header: "<signal.h>".}
+proc sigemptyset*(a1: var Sigset): cint {.importc, header: "<signal.h>".}
+proc sigfillset*(a1: var Sigset): cint {.importc, header: "<signal.h>".}
 proc sighold*(a1: cint): cint {.importc, header: "<signal.h>".}
 proc sigignore*(a1: cint): cint {.importc, header: "<signal.h>".}
 proc siginterrupt*(a1, a2: cint): cint {.importc, header: "<signal.h>".}
-proc sigismember*(a1: var Tsigset, a2: cint): cint {.importc, header: "<signal.h>".}
-proc signal*(a1: cint, a2: proc (x: cint) {.noconv.}) {.
+proc sigismember*(a1: var Sigset, a2: cint): cint {.importc, header: "<signal.h>".}
+proc signal*(a1: cint, a2: Sighandler) {.
   importc, header: "<signal.h>".}
 proc sigpause*(a1: cint): cint {.importc, header: "<signal.h>".}
-proc sigpending*(a1: var tsigset): cint {.importc, header: "<signal.h>".}
-proc sigprocmask*(a1: cint, a2, a3: var tsigset): cint {.
+proc sigpending*(a1: var Sigset): cint {.importc, header: "<signal.h>".}
+proc sigprocmask*(a1: cint, a2, a3: var Sigset): cint {.
   importc, header: "<signal.h>".}
-proc sigqueue*(a1: tpid, a2: cint, a3: Tsigval): cint {.
+proc sigqueue*(a1: Pid, a2: cint, a3: SigVal): cint {.
   importc, header: "<signal.h>".}
 proc sigrelse*(a1: cint): cint {.importc, header: "<signal.h>".}
-proc sigset*(a1: int, a2: proc (x: cint) {.noconv.}) {.importc, header: "<signal.h>".}
-proc sigsuspend*(a1: var Tsigset): cint {.importc, header: "<signal.h>".}
-proc sigtimedwait*(a1: var Tsigset, a2: var tsiginfo, 
-                   a3: var ttimespec): cint {.importc, header: "<signal.h>".}
-proc sigwait*(a1: var Tsigset, a2: var cint): cint {.importc, header: "<signal.h>".}
-proc sigwaitinfo*(a1: var Tsigset, a2: var tsiginfo): cint {.
+proc sigset*(a1: int, a2: proc (x: cint) {.noconv.}) {.
+  importc, header: "<signal.h>".}
+proc sigsuspend*(a1: var Sigset): cint {.importc, header: "<signal.h>".}
+
+when defined(android):
+  proc syscall(arg: clong): clong {.varargs, importc: "syscall", header: "<unistd.h>".}
+  var NR_rt_sigtimedwait {.importc: "__NR_rt_sigtimedwait", header: "<sys/syscall.h>".}: clong
+  var NSIGMAX {.importc: "NSIG", header: "<signal.h>".}: clong
+
+  proc sigtimedwait*(a1: var Sigset, a2: var SigInfo, a3: var Timespec): cint =
+    result = cint(syscall(NR_rt_sigtimedwait, addr(a1), addr(a2), addr(a3), NSIGMAX div 8))
+else:
+  proc sigtimedwait*(a1: var Sigset, a2: var SigInfo,
+                     a3: var Timespec): cint {.importc, header: "<signal.h>".}
+
+when defined(sunos) or defined(solaris):
+  # The following compile time flag is needed on Illumos/Solaris to use the POSIX
+  # `sigwait` implementation. See the documentation here:
+  # https://docs.oracle.com/cd/E19455-01/806-5257/6je9h033k/index.html
+  # https://www.illumos.org/man/2/sigwait
+  {.passc: "-D_POSIX_PTHREAD_SEMANTICS".}
+
+proc sigwait*(a1: var Sigset, a2: var cint): cint {.
+  importc, header: "<signal.h>".}
+proc sigwaitinfo*(a1: var Sigset, a2: var SigInfo): cint {.
   importc, header: "<signal.h>".}
 
-
-proc catclose*(a1: Tnl_catd): cint {.importc, header: "<nl_types.h>".}
-proc catgets*(a1: Tnl_catd, a2, a3: cint, a4: cstring): cstring {.
-  importc, header: "<nl_types.h>".}
-proc catopen*(a1: cstring, a2: cint): Tnl_catd {.importc, header: "<nl_types.h>".}
+when not defined(nintendoswitch):
+  proc catclose*(a1: Nl_catd): cint {.importc, header: "<nl_types.h>".}
+  proc catgets*(a1: Nl_catd, a2, a3: cint, a4: cstring): cstring {.
+    importc, header: "<nl_types.h>".}
+  proc catopen*(a1: cstring, a2: cint): Nl_catd {.
+    importc, header: "<nl_types.h>".}
 
 proc sched_get_priority_max*(a1: cint): cint {.importc, header: "<sched.h>".}
 proc sched_get_priority_min*(a1: cint): cint {.importc, header: "<sched.h>".}
-proc sched_getparam*(a1: tpid, a2: var Tsched_param): cint {.
+proc sched_getparam*(a1: Pid, a2: var Sched_param): cint {.
   importc, header: "<sched.h>".}
-proc sched_getscheduler*(a1: tpid): cint {.importc, header: "<sched.h>".}
-proc sched_rr_get_interval*(a1: tpid, a2: var Ttimespec): cint {.
+proc sched_getscheduler*(a1: Pid): cint {.importc, header: "<sched.h>".}
+proc sched_rr_get_interval*(a1: Pid, a2: var Timespec): cint {.
   importc, header: "<sched.h>".}
-proc sched_setparam*(a1: tpid, a2: var Tsched_param): cint {.
+proc sched_setparam*(a1: Pid, a2: var Sched_param): cint {.
   importc, header: "<sched.h>".}
-proc sched_setscheduler*(a1: tpid, a2: cint, a3: var tsched_param): cint {.
+proc sched_setscheduler*(a1: Pid, a2: cint, a3: var Sched_param): cint {.
   importc, header: "<sched.h>".}
 proc sched_yield*(): cint {.importc, header: "<sched.h>".}
 
-proc strerror*(errnum: cint): cstring {.importc, header: "<string.h>".}
+proc hstrerror*(herrnum: cint): cstring {.importc:"(char *)$1", header: "<netdb.h>".}
 
-proc FD_CLR*(a1: cint, a2: var Tfd_set) {.importc, header: "<sys/select.h>".}
-proc FD_ISSET*(a1: cint, a2: var Tfd_set): cint {.
+proc FD_CLR*(a1: cint, a2: var TFdSet) {.importc, header: "<sys/select.h>".}
+proc FD_ISSET*(a1: cint | SocketHandle, a2: var TFdSet): cint {.
   importc, header: "<sys/select.h>".}
-proc FD_SET*(a1: cint, a2: var Tfd_set) {.importc, header: "<sys/select.h>".}
-proc FD_ZERO*(a1: var Tfd_set) {.importc, header: "<sys/select.h>".}
+proc FD_SET*(a1: cint | SocketHandle, a2: var TFdSet) {.
+  importc: "FD_SET", header: "<sys/select.h>".}
+proc FD_ZERO*(a1: var TFdSet) {.importc, header: "<sys/select.h>".}
 
-proc pselect*(a1: cint, a2, a3, a4: var Tfd_set, a5: var ttimespec,
-         a6: var Tsigset): cint  {.importc, header: "<sys/select.h>".}
-proc select*(a1: cint, a2, a3, a4: var Tfd_set, a5: var ttimeval): cint {.
+proc pselect*(a1: cint, a2, a3, a4: ptr TFdSet, a5: ptr Timespec,
+         a6: var Sigset): cint  {.importc, header: "<sys/select.h>".}
+proc select*(a1: cint | SocketHandle, a2, a3, a4: ptr TFdSet, a5: ptr Timeval): cint {.
              importc, header: "<sys/select.h>".}
 
 when hasSpawnH:
-  proc posix_spawn*(a1: var tpid, a2: cstring,
+  proc posix_spawn*(a1: var Pid, a2: cstring,
             a3: var Tposix_spawn_file_actions,
-            a4: var Tposix_spawnattr, 
+            a4: var Tposix_spawnattr,
             a5, a6: cstringArray): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawn_file_actions_addclose*(a1: var tposix_spawn_file_actions,
+  proc posix_spawn_file_actions_addclose*(a1: var Tposix_spawn_file_actions,
             a2: cint): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawn_file_actions_adddup2*(a1: var tposix_spawn_file_actions,
+  proc posix_spawn_file_actions_adddup2*(a1: var Tposix_spawn_file_actions,
             a2, a3: cint): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawn_file_actions_addopen*(a1: var tposix_spawn_file_actions,
-            a2: cint, a3: cstring, a4: cint, a5: tmode): cint {.
+  proc posix_spawn_file_actions_addopen*(a1: var Tposix_spawn_file_actions,
+            a2: cint, a3: cstring, a4: cint, a5: Mode): cint {.
             importc, header: "<spawn.h>".}
   proc posix_spawn_file_actions_destroy*(
-    a1: var tposix_spawn_file_actions): cint {.importc, header: "<spawn.h>".}
+    a1: var Tposix_spawn_file_actions): cint {.importc, header: "<spawn.h>".}
   proc posix_spawn_file_actions_init*(
-    a1: var tposix_spawn_file_actions): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_destroy*(a1: var tposix_spawnattr): cint {.
+    a1: var Tposix_spawn_file_actions): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_destroy*(a1: var Tposix_spawnattr): cint {.
     importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getsigdefault*(a1: var tposix_spawnattr,
-            a2: var Tsigset): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getflags*(a1: var tposix_spawnattr,
+  proc posix_spawnattr_getsigdefault*(a1: var Tposix_spawnattr,
+            a2: var Sigset): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_getflags*(a1: var Tposix_spawnattr,
             a2: var cshort): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getpgroup*(a1: var tposix_spawnattr,
-            a2: var tpid): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getschedparam*(a1: var tposix_spawnattr,
-            a2: var tsched_param): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getschedpolicy*(a1: var tposix_spawnattr,
+  proc posix_spawnattr_getpgroup*(a1: var Tposix_spawnattr,
+            a2: var Pid): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_getschedparam*(a1: var Tposix_spawnattr,
+            a2: var Sched_param): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_getschedpolicy*(a1: var Tposix_spawnattr,
             a2: var cint): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_getsigmask*(a1: var tposix_spawnattr,
-            a2: var tsigset): cint {.importc, header: "<spawn.h>".}
-  
-  proc posix_spawnattr_init*(a1: var tposix_spawnattr): cint {.
+  proc posix_spawnattr_getsigmask*(a1: var Tposix_spawnattr,
+            a2: var Sigset): cint {.importc, header: "<spawn.h>".}
+
+  proc posix_spawnattr_init*(a1: var Tposix_spawnattr): cint {.
     importc, header: "<spawn.h>".}
-  proc posix_spawnattr_setsigdefault*(a1: var tposix_spawnattr,
-            a2: var tsigset): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_setflags*(a1: var tposix_spawnattr, a2: cshort): cint {.
+  proc posix_spawnattr_setsigdefault*(a1: var Tposix_spawnattr,
+            a2: var Sigset): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_setflags*(a1: var Tposix_spawnattr, a2: cint): cint {.
     importc, header: "<spawn.h>".}
-  proc posix_spawnattr_setpgroup*(a1: var tposix_spawnattr, a2: tpid): cint {.
+  proc posix_spawnattr_setpgroup*(a1: var Tposix_spawnattr, a2: Pid): cint {.
     importc, header: "<spawn.h>".}
-  
-  proc posix_spawnattr_setschedparam*(a1: var tposix_spawnattr,
-            a2: var tsched_param): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnattr_setschedpolicy*(a1: var tposix_spawnattr, 
+
+  proc posix_spawnattr_setschedparam*(a1: var Tposix_spawnattr,
+            a2: var Sched_param): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnattr_setschedpolicy*(a1: var Tposix_spawnattr,
                                        a2: cint): cint {.
                                        importc, header: "<spawn.h>".}
-  proc posix_spawnattr_setsigmask*(a1: var tposix_spawnattr,
-            a2: var tsigset): cint {.importc, header: "<spawn.h>".}
-  proc posix_spawnp*(a1: var tpid, a2: cstring,
-            a3: var tposix_spawn_file_actions,
-            a4: var tposix_spawnattr,
+  proc posix_spawnattr_setsigmask*(a1: var Tposix_spawnattr,
+            a2: var Sigset): cint {.importc, header: "<spawn.h>".}
+  proc posix_spawnp*(a1: var Pid, a2: cstring,
+            a3: var Tposix_spawn_file_actions,
+            a4: var Tposix_spawnattr,
             a5, a6: cstringArray): cint {.importc, header: "<spawn.h>".}
 
-proc getcontext*(a1: var Tucontext): cint {.importc, header: "<ucontext.h>".}
-proc makecontext*(a1: var Tucontext, a4: proc (){.noconv.}, a3: cint) {.
-  varargs, importc, header: "<ucontext.h>".}
-proc setcontext*(a1: var Tucontext): cint {.importc, header: "<ucontext.h>".}
-proc swapcontext*(a1, a2: var Tucontext): cint {.importc, header: "<ucontext.h>".}
+when not defined(nintendoswitch):
+  proc getcontext*(a1: var Ucontext): cint {.importc, header: "<ucontext.h>".}
+  proc makecontext*(a1: var Ucontext, a4: proc (){.noconv.}, a3: cint) {.
+    varargs, importc, header: "<ucontext.h>".}
+  proc setcontext*(a1: var Ucontext): cint {.importc, header: "<ucontext.h>".}
+  proc swapcontext*(a1, a2: var Ucontext): cint {.importc, header: "<ucontext.h>".}
 
-proc readv*(a1: cint, a2: ptr TIOVec, a3: cint): int {.
+proc readv*(a1: cint, a2: ptr IOVec, a3: cint): int {.
   importc, header: "<sys/uio.h>".}
-proc writev*(a1: cint, a2: ptr TIOVec, a3: cint): int {.
+proc writev*(a1: cint, a2: ptr IOVec, a3: cint): int {.
   importc, header: "<sys/uio.h>".}
 
 proc CMSG_DATA*(cmsg: ptr Tcmsghdr): cstring {.
   importc, header: "<sys/socket.h>".}
 
-proc CMSG_NXTHDR*(mhdr: ptr TMsgHdr, cmsg: ptr TCMsgHdr): ptr TCmsgHdr {.
+proc CMSG_NXTHDR*(mhdr: ptr Tmsghdr, cmsg: ptr Tcmsghdr): ptr Tcmsghdr {.
   importc, header: "<sys/socket.h>".}
 
-proc CMSG_FIRSTHDR*(mhdr: ptr TMsgHdr): ptr TCMsgHdr {.
+proc CMSG_FIRSTHDR*(mhdr: ptr Tmsghdr): ptr Tcmsghdr {.
   importc, header: "<sys/socket.h>".}
 
-proc accept*(a1: cint, a2: ptr Tsockaddr, a3: ptr Tsocklen): cint {.
+proc CMSG_SPACE*(len: csize_t): csize_t {.
   importc, header: "<sys/socket.h>".}
 
-proc bindSocket*(a1: cint, a2: ptr Tsockaddr, a3: Tsocklen): cint {.
-  importc: "bind", header: "<sys/socket.h>".}
-  ## is Posix's ``bind``, because ``bind`` is a reserved word
-  
-proc connect*(a1: cint, a2: ptr Tsockaddr, a3: Tsocklen): cint {.
-  importc, header: "<sys/socket.h>".}
-proc getpeername*(a1: cint, a2: ptr Tsockaddr, a3: ptr Tsocklen): cint {.
-  importc, header: "<sys/socket.h>".}
-proc getsockname*(a1: cint, a2: ptr Tsockaddr, a3: ptr Tsocklen): cint {.
+proc CMSG_LEN*(len: csize_t): csize_t {.
   importc, header: "<sys/socket.h>".}
 
-proc getsockopt*(a1, a2, a3: cint, a4: pointer, a5: ptr Tsocklen): cint {.
-  importc, header: "<sys/socket.h>".}
+const
+  INVALID_SOCKET* = SocketHandle(-1)
 
-proc listen*(a1, a2: cint): cint {.
-  importc, header: "<sys/socket.h>".}
-proc recv*(a1: cint, a2: pointer, a3: int, a4: cint): int {.
-  importc, header: "<sys/socket.h>".}
-proc recvfrom*(a1: cint, a2: pointer, a3: int, a4: cint,
-        a5: ptr Tsockaddr, a6: ptr Tsocklen): int {.
-  importc, header: "<sys/socket.h>".}
-proc recvmsg*(a1: cint, a2: ptr Tmsghdr, a3: cint): int {.
+proc `==`*(x, y: SocketHandle): bool {.borrow.}
+
+proc accept*(a1: SocketHandle, a2: ptr SockAddr, a3: ptr SockLen): SocketHandle {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+
+when defined(linux) or defined(bsd) or defined(nuttx):
+  proc accept4*(a1: SocketHandle, a2: ptr SockAddr, a3: ptr SockLen,
+                flags: cint): SocketHandle {.importc, header: "<sys/socket.h>".}
+
+proc bindSocket*(a1: SocketHandle, a2: ptr SockAddr, a3: SockLen): cint {.
+  importc: "bind", header: "<sys/socket.h>".}
+  ## is Posix's `bind`, because `bind` is a reserved word
+
+proc connect*(a1: SocketHandle, a2: ptr SockAddr, a3: SockLen): cint {.
   importc, header: "<sys/socket.h>".}
-proc send*(a1: cint, a2: pointer, a3: int, a4: cint): int {.
+proc getpeername*(a1: SocketHandle, a2: ptr SockAddr, a3: ptr SockLen): cint {.
   importc, header: "<sys/socket.h>".}
-proc sendmsg*(a1: cint, a2: ptr Tmsghdr, a3: cint): int {.
+proc getsockname*(a1: SocketHandle, a2: ptr SockAddr, a3: ptr SockLen): cint {.
   importc, header: "<sys/socket.h>".}
-proc sendto*(a1: cint, a2: pointer, a3: int, a4: cint, a5: ptr Tsockaddr,
-             a6: Tsocklen): int {.
+
+proc getsockopt*(a1: SocketHandle, a2, a3: cint, a4: pointer, a5: ptr SockLen): cint {.
   importc, header: "<sys/socket.h>".}
-proc setsockopt*(a1, a2, a3: cint, a4: pointer, a5: Tsocklen): cint {.
+
+proc listen*(a1: SocketHandle, a2: cint): cint {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc recv*(a1: SocketHandle, a2: pointer, a3: int, a4: cint): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc recvfrom*(a1: SocketHandle, a2: pointer, a3: int, a4: cint,
+        a5: ptr SockAddr, a6: ptr SockLen): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc recvmsg*(a1: SocketHandle, a2: ptr Tmsghdr, a3: cint): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc send*(a1: SocketHandle, a2: pointer, a3: int, a4: cint): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc sendmsg*(a1: SocketHandle, a2: ptr Tmsghdr, a3: cint): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc sendto*(a1: SocketHandle, a2: pointer, a3: int, a4: cint, a5: ptr SockAddr,
+             a6: SockLen): int {.
+  importc, header: "<sys/socket.h>", sideEffect.}
+proc setsockopt*(a1: SocketHandle, a2, a3: cint, a4: pointer, a5: SockLen): cint {.
   importc, header: "<sys/socket.h>".}
-proc shutdown*(a1, a2: cint): cint {.
+proc shutdown*(a1: SocketHandle, a2: cint): cint {.
   importc, header: "<sys/socket.h>".}
-proc socket*(a1, a2, a3: cint): cint {.
+proc socket*(a1, a2, a3: cint): SocketHandle {.
   importc, header: "<sys/socket.h>".}
 proc sockatmark*(a1: cint): cint {.
   importc, header: "<sys/socket.h>".}
@@ -2358,40 +1009,46 @@ proc if_indextoname*(a1: cint, a2: cstring): cstring {.
 proc if_nameindex*(): ptr Tif_nameindex {.importc, header: "<net/if.h>".}
 proc if_freenameindex*(a1: ptr Tif_nameindex) {.importc, header: "<net/if.h>".}
 
-proc IN6_IS_ADDR_UNSPECIFIED* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_UNSPECIFIED* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Unspecified address.
-proc IN6_IS_ADDR_LOOPBACK* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_LOOPBACK* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Loopback address.
-proc IN6_IS_ADDR_MULTICAST* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MULTICAST* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast address.
-proc IN6_IS_ADDR_LINKLOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_LINKLOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Unicast link-local address.
-proc IN6_IS_ADDR_SITELOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_SITELOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Unicast site-local address.
-proc IN6_IS_ADDR_V4MAPPED* (a1: ptr TIn6Addr): cint {.
-  importc, header: "<netinet/in.h>".}
-  ## IPv4 mapped address.
-proc IN6_IS_ADDR_V4COMPAT* (a1: ptr TIn6Addr): cint {.
+when defined(lwip):
+  proc IN6_IS_ADDR_V4MAPPED*(ipv6_address: ptr In6Addr): cint =
+    var bits32: ptr array[4, uint32] = cast[ptr array[4, uint32]](ipv6_address)
+    return (bits32[1] == 0'u32 and bits32[2] == htonl(0x0000FFFF)).cint
+else:
+  proc IN6_IS_ADDR_V4MAPPED* (a1: ptr In6Addr): cint {.
+    importc, header: "<netinet/in.h>".}
+    ## IPv4 mapped address.
+
+proc IN6_IS_ADDR_V4COMPAT* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## IPv4-compatible address.
-proc IN6_IS_ADDR_MC_NODELOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MC_NODELOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast node-local address.
-proc IN6_IS_ADDR_MC_LINKLOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MC_LINKLOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast link-local address.
-proc IN6_IS_ADDR_MC_SITELOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MC_SITELOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast site-local address.
-proc IN6_IS_ADDR_MC_ORGLOCAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MC_ORGLOCAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast organization-local address.
-proc IN6_IS_ADDR_MC_GLOBAL* (a1: ptr TIn6Addr): cint {.
+proc IN6_IS_ADDR_MC_GLOBAL* (a1: ptr In6Addr): cint {.
   importc, header: "<netinet/in.h>".}
   ## Multicast global address.
 
@@ -2399,44 +1056,121 @@ proc endhostent*() {.importc, header: "<netdb.h>".}
 proc endnetent*() {.importc, header: "<netdb.h>".}
 proc endprotoent*() {.importc, header: "<netdb.h>".}
 proc endservent*() {.importc, header: "<netdb.h>".}
-proc freeaddrinfo*(a1: ptr Taddrinfo) {.importc, header: "<netdb.h>".}
+proc freeAddrInfo*(a1: ptr AddrInfo) {.importc: "freeaddrinfo", header: "<netdb.h>".}
 
-proc gai_strerror*(a1: cint): cstring {.importc, header: "<netdb.h>".}
+proc gai_strerror*(a1: cint): cstring {.importc:"(char *)$1", header: "<netdb.h>".}
 
-proc getaddrinfo*(a1, a2: cstring, a3: ptr TAddrInfo, 
-                  a4: var ptr TAddrInfo): cint {.importc, header: "<netdb.h>".}
-                  
-proc gethostbyaddr*(a1: pointer, a2: Tsocklen, a3: cint): ptr THostent {.
-                    importc, header: "<netdb.h>".}
-proc gethostbyname*(a1: cstring): ptr THostent {.importc, header: "<netdb.h>".}
-proc gethostent*(): ptr THostent {.importc, header: "<netdb.h>".}
+proc getaddrinfo*(a1, a2: cstring, a3: ptr AddrInfo,
+                  a4: var ptr AddrInfo): cint {.importc, header: "<netdb.h>".}
 
-proc getnameinfo*(a1: ptr Tsockaddr, a2: Tsocklen,
-                  a3: cstring, a4: Tsocklen, a5: cstring,
-                  a6: Tsocklen, a7: cint): cint {.importc, header: "<netdb.h>".}
+when not defined(android4):
+  proc gethostbyaddr*(a1: pointer, a2: SockLen, a3: cint): ptr Hostent {.
+                      importc, header: "<netdb.h>".}
+else:
+  proc gethostbyaddr*(a1: cstring, a2: cint, a3: cint): ptr Hostent {.
+                      importc, header: "<netdb.h>".}
+proc gethostbyname*(a1: cstring): ptr Hostent {.importc, header: "<netdb.h>".}
+proc gethostent*(): ptr Hostent {.importc, header: "<netdb.h>".}
 
-proc getnetbyaddr*(a1: int32, a2: cint): ptr TNetent {.importc, header: "<netdb.h>".}
-proc getnetbyname*(a1: cstring): ptr TNetent {.importc, header: "<netdb.h>".}
-proc getnetent*(): ptr TNetent {.importc, header: "<netdb.h>".}
+proc getnameinfo*(a1: ptr SockAddr, a2: SockLen,
+                  a3: cstring, a4: SockLen, a5: cstring,
+                  a6: SockLen, a7: cint): cint {.importc, header: "<netdb.h>".}
 
-proc getprotobyname*(a1: cstring): ptr TProtoent {.importc, header: "<netdb.h>".}
-proc getprotobynumber*(a1: cint): ptr TProtoent {.importc, header: "<netdb.h>".}
-proc getprotoent*(): ptr TProtoent {.importc, header: "<netdb.h>".}
+proc getnetbyaddr*(a1: int32, a2: cint): ptr Tnetent {.importc, header: "<netdb.h>".}
+proc getnetbyname*(a1: cstring): ptr Tnetent {.importc, header: "<netdb.h>".}
+proc getnetent*(): ptr Tnetent {.importc, header: "<netdb.h>".}
 
-proc getservbyname*(a1, a2: cstring): ptr TServent {.importc, header: "<netdb.h>".}
-proc getservbyport*(a1: cint, a2: cstring): ptr TServent {.
+proc getprotobyname*(a1: cstring): ptr Protoent {.importc, header: "<netdb.h>".}
+proc getprotobynumber*(a1: cint): ptr Protoent {.importc, header: "<netdb.h>".}
+proc getprotoent*(): ptr Protoent {.importc, header: "<netdb.h>".}
+
+proc getservbyname*(a1, a2: cstring): ptr Servent {.importc, header: "<netdb.h>".}
+proc getservbyport*(a1: cint, a2: cstring): ptr Servent {.
   importc, header: "<netdb.h>".}
-proc getservent*(): ptr TServent {.importc, header: "<netdb.h>".}
+proc getservent*(): ptr Servent {.importc, header: "<netdb.h>".}
 
 proc sethostent*(a1: cint) {.importc, header: "<netdb.h>".}
 proc setnetent*(a1: cint) {.importc, header: "<netdb.h>".}
 proc setprotoent*(a1: cint) {.importc, header: "<netdb.h>".}
 proc setservent*(a1: cint) {.importc, header: "<netdb.h>".}
 
-proc poll*(a1: ptr Tpollfd, a2: Tnfds, a3: int): cint {.
-  importc, header: "<poll.h>".}
+when not defined(lwip):
+  proc poll*(a1: ptr TPollfd, a2: Tnfds, a3: int): cint {.
+    importc, header: "<poll.h>", sideEffect.}
 
-proc realpath*(name, resolved: CString): CString {.
+proc realpath*(name, resolved: cstring): cstring {.
   importc: "realpath", header: "<stdlib.h>".}
 
+proc mkstemp*(tmpl: cstring): cint {.importc, header: "<stdlib.h>", sideEffect.}
+  ## Creates a unique temporary file.
+  ##
+  ## .. warning:: The `tmpl` argument is written to by `mkstemp` and thus
+  ##   can't be a string literal. If in doubt make a copy of the cstring before
+  ##   passing it in.
+
+proc mkstemps*(tmpl: cstring, suffixlen: int): cint {.importc, header: "<stdlib.h>", sideEffect.}
+  ## Creates a unique temporary file.
+  ##
+  ## .. warning:: The `tmpl` argument is written to by `mkstemps` and thus
+  ##   can't be a string literal. If in doubt make a copy of the cstring before
+  ##   passing it in.
+
+proc mkdtemp*(tmpl: cstring): pointer {.importc, header: "<stdlib.h>", sideEffect.}
+
+when defined(linux) or defined(bsd) or defined(osx):
+  proc mkostemp*(tmpl: cstring, oflags: cint): cint {.importc, header: "<stdlib.h>", sideEffect.}
+  proc mkostemps*(tmpl: cstring, suffixlen: cint, oflags: cint): cint {.importc, header: "<stdlib.h>", sideEffect.}
+
+  proc posix_memalign*(memptr: pointer, alignment: csize_t, size: csize_t): cint {.importc, header: "<stdlib.h>".}
+
+proc utimes*(path: cstring, times: ptr array[2, Timeval]): int {.
+  importc: "utimes", header: "<sys/time.h>", sideEffect.}
+  ## Sets file access and modification times.
+  ##
+  ## Pass the filename and an array of times to set the access and modification
+  ## times respectively. If you pass nil as the array both attributes will be
+  ## set to the current time.
+  ##
+  ## Returns zero on success.
+  ##
+  ## For more information read http://www.unix.com/man-page/posix/3/utimes/.
+
+proc handle_signal(sig: cint, handler: proc (a: cint) {.noconv.}) {.importc: "signal", header: "<signal.h>".}
+
+template onSignal*(signals: varargs[cint], body: untyped) =
+  ## Setup code to be executed when Unix signals are received. The
+  ## currently handled signal is injected as `sig` into the calling
+  ## scope.
+  ##
+  ## Example:
+  ##   ```Nim
+  ##   from std/posix import SIGINT, SIGTERM, onSignal
+  ##   onSignal(SIGINT, SIGTERM):
+  ##     echo "bye from signal ", sig
+  ##   ```
+
+  for s in signals:
+    handle_signal(s,
+      proc (signal: cint) {.noconv.} =
+        let sig {.inject.} = signal
+        body
+    )
 
+type
+  RLimit* {.importc: "struct rlimit",
+            header: "<sys/resource.h>", pure, final.} = object
+    rlim_cur*: int
+    rlim_max*: int
+  ## The getrlimit() and setrlimit() system calls get and set resource limits respectively.
+  ## Each resource has an associated soft and hard limit, as defined by the RLimit structure
+
+proc setrlimit*(resource: cint, rlp: var RLimit): cint {.
+  importc: "setrlimit", header: "<sys/resource.h>".}
+  ## The setrlimit() system calls sets resource limits.
+
+proc getrlimit*(resource: cint, rlp: var RLimit): cint {.
+  importc: "getrlimit", header: "<sys/resource.h>".}
+  ## The getrlimit() system call gets resource limits.
+
+when defined(nimHasStyleChecks):
+  {.pop.} # {.push styleChecks: off.}