Add terminal.terminalWidth and supporting types/calls.

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/posix/termios.nim b/lib/posix/termios.nim
index c3934c6a9..88c3edf01 100644
--- a/lib/posix/termios.nim
+++ b/lib/posix/termios.nim
@@ -259,3 +259,13 @@ proc tcFlow*(fd: cint; action: cint): cint {.importc: "tcflow",
 # Get process group ID for session leader for controlling terminal FD.
 
 proc tcGetSid*(fd: cint): Pid {.importc: "tcgetsid", header: "<termios.h>".}
+
+# Window size ioctl.  Should work on on any Unix that xterm has been ported to.
+var TIOCGWINSZ*{.importc, header: "<sys/ioctl.h>".}: culong
+
+type ioctl_winsize* {.importc: "struct winsize", header: "<termios.h>",
+                      final, pure.} = object
+  ws_row*, ws_col*, ws_xpixel*, ws_ypixel*: cushort
+
+proc ioctl*(fd: cint, request: culong, reply: ptr ioctl_winsize): int {.
+  importc: "ioctl", header: "<stdio.h>", varargs.}