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pkg/term: use IoctlGetWinsize/IoctlSetWinsize from golang.org/x/sys/unix

Browse source 
Use unix.IoctlGetWinsize and unix.IoctlSetWinsize instead of manually
reimplementing them.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
This commit is contained in:
Tobias Klauser 2017-09-01 14:43:09 +02:00
parent 184cea5ff7
commit 32dfc0cb64
1 changed files with 4 additions and 14 deletions
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18
pkg/term/winsize.go
View file

@ -3,28 +3,18 @@
package term
import (
"unsafe"
"golang.org/x/sys/unix"
)
// GetWinsize returns the window size based on the specified file descriptor.
func GetWinsize(fd uintptr) (*Winsize, error) {
ws := &Winsize{}
_, _, err := unix.Syscall(unix.SYS_IOCTL, fd, uintptr(unix.TIOCGWINSZ), uintptr(unsafe.Pointer(ws)))
// Skipp errno = 0
if err == 0 {
return ws, nil
}
uws, err := unix.IoctlGetWinsize(int(fd), unix.TIOCGWINSZ)
ws := &Winsize{Height: uws.Row, Width: uws.Col, x: uws.Xpixel, y: uws.Ypixel}
return ws, err
}
// SetWinsize tries to set the specified window size for the specified file descriptor.
func SetWinsize(fd uintptr, ws *Winsize) error {
_, _, err := unix.Syscall(unix.SYS_IOCTL, fd, uintptr(unix.TIOCSWINSZ), uintptr(unsafe.Pointer(ws)))
// Skipp errno = 0
if err == 0 {
return nil
}
return err
uws := &unix.Winsize{Row: ws.Height, Col: ws.Width, Xpixel: ws.x, Ypixel: ws.y}
return unix.IoctlSetWinsize(int(fd), unix.TIOCSWINSZ, uws)
}