mirror of
https://github.com/opencontainers/runc.git
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91eafcbc65
This moves all console code to use github.com/containerd/console library to handle console I/O. Also move to use EpollConsole by default when user requests a terminal so we can still cope when the other side temporarily goes away. Signed-off-by: Daniel Dao <dqminh89@gmail.com>
68 lines
1.7 KiB
Go
68 lines
1.7 KiB
Go
package console
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import (
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"fmt"
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"os"
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"unsafe"
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"golang.org/x/sys/unix"
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)
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func tcget(fd uintptr, p *unix.Termios) error {
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termios, err := unix.IoctlGetTermios(int(fd), unix.TCGETS)
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if err != nil {
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return err
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}
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*p = *termios
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return nil
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}
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func tcset(fd uintptr, p *unix.Termios) error {
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return unix.IoctlSetTermios(int(fd), unix.TCSETS, p)
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}
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func ioctl(fd, flag, data uintptr) error {
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if _, _, err := unix.Syscall(unix.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(), unix.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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n, err := unix.IoctlGetInt(int(f.Fd()), unix.TIOCGPTN)
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if 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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var termios unix.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 &^= unix.ONLCR
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return tcset(f.Fd(), &termios)
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}
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func cfmakeraw(t unix.Termios) unix.Termios {
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t.Iflag = t.Iflag & ^uint32((unix.IGNBRK | unix.BRKINT | unix.PARMRK | unix.ISTRIP | unix.INLCR | unix.IGNCR | unix.ICRNL | unix.IXON))
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t.Oflag = t.Oflag & ^uint32(unix.OPOST)
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t.Lflag = t.Lflag & ^(uint32(unix.ECHO | unix.ECHONL | unix.ICANON | unix.ISIG | unix.IEXTEN))
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t.Cflag = t.Cflag & ^(uint32(unix.CSIZE | unix.PARENB))
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t.Cflag = t.Cflag | unix.CS8
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t.Cc[unix.VMIN] = 1
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t.Cc[unix.VTIME] = 0
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return t
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}
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