Merge pull request #26 from yoheiueda/use-syscall-consts
Use syscall.TIOCGPTN and syscall.TIOCSPTLCK for ioctl
Guillaume J. Charmes
9 years ago
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package pty
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// from <asm-generic/ioctl.h>
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const (
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_IOC_NRBITS = 8
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_IOC_TYPEBITS = 8
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_IOC_SIZEBITS = 14
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_IOC_DIRBITS = 2
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_IOC_NRSHIFT = 0
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_IOC_TYPESHIFT = _IOC_NRSHIFT + _IOC_NRBITS
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_IOC_SIZESHIFT = _IOC_TYPESHIFT + _IOC_TYPEBITS
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_IOC_DIRSHIFT = _IOC_SIZESHIFT + _IOC_SIZEBITS
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_IOC_NONE uint = 0
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_IOC_WRITE uint = 1
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_IOC_READ uint = 2
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)
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func _IOC(dir uint, ioctl_type byte, nr byte, size uintptr) uintptr {
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return (uintptr(dir)<<_IOC_DIRSHIFT |
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uintptr(ioctl_type)<<_IOC_TYPESHIFT |
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uintptr(nr)<<_IOC_NRSHIFT |
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size<<_IOC_SIZESHIFT)
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}
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func _IO(ioctl_type byte, nr byte) uintptr {
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return _IOC(_IOC_NONE, ioctl_type, nr, 0)
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}
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func _IOR(ioctl_type byte, nr byte, size uintptr) uintptr {
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return _IOC(_IOC_READ, ioctl_type, nr, size)
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}
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func _IOW(ioctl_type byte, nr byte, size uintptr) uintptr {
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return _IOC(_IOC_WRITE, ioctl_type, nr, size)
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}
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func _IOWR(ioctl_type byte, nr byte, size uintptr) uintptr {
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return _IOC(_IOC_READ|_IOC_WRITE, ioctl_type, nr, size)
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}
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"strconv"
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"syscall"
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"unsafe"
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)
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var (
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ioctl_TIOCGPTN = _IOR('T', 0x30, unsafe.Sizeof(_C_uint(0))) /* Get Pty Number (of pty-mux device) */
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ioctl_TIOCSPTLCK = _IOW('T', 0x31, unsafe.Sizeof(_C_int(0))) /* Lock/unlock Pty */
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)
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func open() (pty, tty *os.File, err error) {
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func ptsname(f *os.File) (string, error) {
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var n _C_uint
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err := ioctl(f.Fd(), ioctl_TIOCGPTN, uintptr(unsafe.Pointer(&n)))
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err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n)))
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if err != nil {
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return "", err
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}
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func unlockpt(f *os.File) error {
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var u _C_int
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// use TIOCSPTLCK with a zero valued arg to clear the slave pty lock
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return ioctl(f.Fd(), ioctl_TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
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return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
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}
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