53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
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// +build linux
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package console
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import (
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"fmt"
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"os"
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"syscall"
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"unsafe"
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)
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func tcget(fd uintptr, p *syscall.Termios) error {
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return ioctl(fd, syscall.TCGETS, uintptr(unsafe.Pointer(p)))
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}
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func tcset(fd uintptr, p *syscall.Termios) error {
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return ioctl(fd, syscall.TCSETS, uintptr(unsafe.Pointer(p)))
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}
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func ioctl(fd, flag, data uintptr) error {
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, flag, data); err != 0 {
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return err
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}
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return nil
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}
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// unlockpt unlocks the slave pseudoterminal device corresponding to the master pseudoterminal referred to by f.
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// unlockpt should be called before opening the slave side of a pty.
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func unlockpt(f *os.File) error {
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var u int32
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return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u)))
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}
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// ptsname retrieves the name of the first available pts for the given master.
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func ptsname(f *os.File) (string, error) {
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var n int32
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if err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))); err != nil {
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return "", err
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}
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return fmt.Sprintf("/dev/pts/%d", n), nil
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}
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func saneTerminal(f *os.File) error {
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// Go doesn't have a wrapper for any of the termios ioctls.
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var termios syscall.Termios
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if err := tcget(f.Fd(), &termios); err != nil {
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return err
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}
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// Set -onlcr so we don't have to deal with \r.
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termios.Oflag &^= syscall.ONLCR
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return tcset(f.Fd(), &termios)
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}
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