Пример #1
0
func (t *pty) open(cols, rows int) error {
	var winp = new(C.struct_winsize)
	winp.ws_col = C.ushort(cols)
	winp.ws_row = C.ushort(rows)
	winp.ws_xpixel = 0
	winp.ws_ypixel = 0

	var master, slave C.int
	var name = make([]C.char, 40)

	if ret := int(C.GoOpenpty(&master, &slave, &name[0], winp)); ret == -1 {
		return errors.New("openpty(3) failed")
	}

	t.master = int(master)
	t.slave = int(slave)
	t.pty = C.GoString(&name[0])

	if err := syscall.SetNonblock(t.master, true); err != nil {
		return err
	}

	if err := syscall.SetNonblock(t.slave, true); err != nil {
		return err
	}
	return nil
}
Пример #2
0
func makeCWindowSize(sz *WindowSize) C.struct_winsize {
	var winsize C.struct_winsize
	winsize.ws_row = C.ushort(sz.Rows)
	winsize.ws_col = C.ushort(sz.Cols)
	winsize.ws_xpixel = C.ushort(sz.PixelWidth)
	winsize.ws_ypixel = C.ushort(sz.PixelHeight)
	return winsize
}
Пример #3
0
func (t *pty) resize(cols, rows int) error {
	var winp = new(C.struct_winsize)
	winp.ws_col = C.ushort(cols)
	winp.ws_row = C.ushort(rows)
	winp.ws_xpixel = 0
	winp.ws_ypixel = 0

	if ret := int(C.GoResize(C.int(t.fd), winp)); ret == -1 {
		return errors.New("ioctl(2) failed")
	}

	return nil
}
Пример #4
0
func (t *pty) fork(file string, args, env []string, cwd string, cols, rows, uid, gid int) error {
	var winp = new(C.struct_winsize)
	winp.ws_col = C.ushort(cols)
	winp.ws_row = C.ushort(rows)
	winp.ws_xpixel = 0
	winp.ws_ypixel = 0

	//fork the pty
	var master C.int = -1
	var name []C.char = make([]C.char, 40)
	var pid C.int = C.GoForkpty(&master, &name[0], winp)

	t.fd = int(master)
	t.pid = int(pid)
	t.pty = C.GoString(&name[0])

	switch t.pid {
	case -1:
		return errors.New("forkpty(3) failed")
	case 0:
		if cwd != "" {
			if err := syscall.Chdir(cwd); err != nil {
				panic("chdir failed")
			}
		}

		if uid != -1 && gid != -1 {
			if err := syscall.Setgid(gid); err != nil {
				panic("setgid failed")
			}

			if err := syscall.Setuid(uid); err != nil {
				panic("setuid failed")
			}
		}

		syscall.Exec(file, args, env)
		panic("exec failed")
	}

	return nil
}
Пример #5
0
func setColsRows(winsz *C.struct_winsize, cols int, rows int) {
	winsz.ws_row = C.ushort(rows)
	winsz.ws_col = C.ushort(cols)
	winsz.ws_xpixel = C.ushort(cols * 9)
	winsz.ws_ypixel = C.ushort(rows * 16)
}