| package pty |
| |
| import ( |
| "os" |
| "strconv" |
| "syscall" |
| "unsafe" |
| ) |
| |
| const ( |
| sys_TIOCGPTN = 0x4004740F |
| sys_TIOCSPTLCK = 0x40045431 |
| ) |
| |
| func open() (pty, tty *os.File, err error) { |
| p, err := os.OpenFile("/dev/ptmx", os.O_RDWR, 0) |
| if err != nil { |
| return nil, nil, err |
| } |
| |
| sname, err := ptsname(p) |
| if err != nil { |
| return nil, nil, err |
| } |
| |
| t, err := os.OpenFile(sname, os.O_RDWR|syscall.O_NOCTTY, 0) |
| if err != nil { |
| return nil, nil, err |
| } |
| return p, t, nil |
| } |
| |
| func ptsname(f *os.File) (string, error) { |
| var n int |
| err := ioctl(f.Fd(), sys_TIOCGPTN, &n) |
| if err != nil { |
| return "", err |
| } |
| return "/dev/pts/" + strconv.Itoa(n), nil |
| } |
| |
| func ioctl(fd uintptr, cmd uintptr, data *int) error { |
| _, _, e := syscall.Syscall( |
| syscall.SYS_IOCTL, |
| fd, |
| cmd, |
| uintptr(unsafe.Pointer(data)), |
| ) |
| if e != 0 { |
| return syscall.ENOTTY |
| } |
| return nil |
| } |