1// +build !windows,!plan9,!solaris,!appengine
2
3package flags
4
5import (
6	"syscall"
7	"unsafe"
8)
9
10type winsize struct {
11	row, col       uint16
12	xpixel, ypixel uint16
13}
14
15func getTerminalColumns() int {
16	ws := winsize{}
17
18	if tIOCGWINSZ != 0 {
19		syscall.Syscall(syscall.SYS_IOCTL,
20			uintptr(0),
21			uintptr(tIOCGWINSZ),
22			uintptr(unsafe.Pointer(&ws)))
23
24		return int(ws.col)
25	}
26
27	return 80
28}
29