4 files changed, 17 insertions, 1 deletions
diff --git a/lib/posix/posix.nim b/lib/posix/posix.nim
index 02312a4d5..55d1dd2eb 100644
--- a/lib/posix/posix.nim
+++ b/lib/posix/posix.nim
@@ -79,6 +79,9 @@ const
   DT_SOCK* = 12   ## UNIX domain socket.
   DT_WHT* = 14
 
+# Special types
+type Sighandler = proc (a: cint) {.noconv.}
+
 # Platform specific stuff
 
 when defined(linux) and defined(amd64):
@@ -86,6 +89,9 @@ when defined(linux) and defined(amd64):
 else:
   include posix_other
 
+# There used to be this name in posix.nim a long time ago, not sure why!
+{.deprecated: [cSIG_HOLD: SIG_HOLD].}
+
 when not defined(macosx):
   proc st_atime*(s: Stat): Time {.inline.} =
     ## Second-granularity time of last access
@@ -659,7 +665,7 @@ 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 Sigset, a2: cint): cint {.importc, header: "<signal.h>".}
-proc signal*(a1: cint, a2: proc (x: cint) {.noconv.}) {.
+proc signal*(a1: cint, a2: Sighandler) {.
   importc, header: "<signal.h>".}
 proc sigpause*(a1: cint): cint {.importc, header: "<signal.h>".}
 proc sigpending*(a1: var Sigset): cint {.importc, header: "<signal.h>".}
diff --git a/lib/posix/posix_linux_amd64.nim b/lib/posix/posix_linux_amd64.nim
index 70f7e710f..c44128b16 100644
--- a/lib/posix/posix_linux_amd64.nim
+++ b/lib/posix/posix_linux_amd64.nim
@@ -36,6 +36,9 @@ type
 
 {.deprecated: [TSocketHandle: SocketHandle].}
 
+# not detected by detect.nim, guarded by #ifdef __USE_UNIX98 in glibc
+const SIG_HOLD* = cast[SigHandler](2)
+
 type
   Timespec* {.importc: "struct timespec",
                header: "<time.h>", final, pure.} = object ## struct timespec
diff --git a/lib/posix/posix_linux_amd64_consts.nim b/lib/posix/posix_linux_amd64_consts.nim
index 9e2ed32e1..4b693960e 100644
--- a/lib/posix/posix_linux_amd64_consts.nim
+++ b/lib/posix/posix_linux_amd64_consts.nim
@@ -399,6 +399,9 @@ const SS_ONSTACK* = cint(1)
 const SS_DISABLE* = cint(2)
 const MINSIGSTKSZ* = cint(2048)
 const SIGSTKSZ* = cint(8192)
+const SIG_DFL* = cast[Sighandler](0)
+const SIG_ERR* = cast[Sighandler](-1)
+const SIG_IGN* = cast[Sighandler](1)
 
 # <sys/ipc.h>
 const IPC_CREAT* = cint(512)
diff --git a/lib/posix/posix_other_consts.nim b/lib/posix/posix_other_consts.nim
index f2a71d1bd..003414a6a 100644
--- a/lib/posix/posix_other_consts.nim
+++ b/lib/posix/posix_other_consts.nim
@@ -414,6 +414,10 @@ var SS_ONSTACK* {.importc: "SS_ONSTACK", header: "<signal.h>".}: cint
 var SS_DISABLE* {.importc: "SS_DISABLE", header: "<signal.h>".}: cint
 var MINSIGSTKSZ* {.importc: "MINSIGSTKSZ", header: "<signal.h>".}: cint
 var SIGSTKSZ* {.importc: "SIGSTKSZ", header: "<signal.h>".}: cint
+var SIG_HOLD* {.importc: "SIG_HOLD", header: "<signal.h>".}: Sighandler
+var SIG_DFL* {.importc: "SIG_DFL", header: "<signal.h>".}: Sighandler
+var SIG_ERR* {.importc: "SIG_ERR", header: "<signal.h>".}: Sighandler
+var SIG_IGN* {.importc: "SIG_IGN", header: "<signal.h>".}: Sighandler
 
 # <sys/ipc.h>
 var IPC_CREAT* {.importc: "IPC_CREAT", header: "<sys/ipc.h>".}: cint