Use the TIOCGWINSZ macro from C to determine correct value of option

jessevdk · Feb 9, 2013 · 412dcc0 · 412dcc0
1 parent 792019a
commit 412dcc0
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/convert_unix.go b/convert_unix.go
@@ -7,6 +7,10 @@ import (
 	"unsafe"
 )
 
+// #include <sys/ioctl.h>
+// enum { _GO_TIOCGWINSZ = TIOCGWINSZ };
+import "C"
+
 type winsize struct {
 	ws_row, ws_col       uint16
 	ws_xpixel, ws_ypixel uint16
@@ -17,7 +21,7 @@ func getTerminalColumns() int {
 
 	syscall.Syscall(syscall.SYS_IOCTL,
 		uintptr(0),
-		uintptr(0x5413),
+		uintptr(C._GO_TIOCGWINSZ),
 		uintptr(unsafe.Pointer(&ws)))
 
 	return int(ws.ws_col)