diff options
author | Dawid Dziurla <dawidd0811@gmail.com> | 2020-03-25 10:37:39 +0100 |
---|---|---|
committer | Jesse Duffield <jessedduffield@gmail.com> | 2020-03-25 21:26:15 +1100 |
commit | 8a06b6067ebe5b96a885c8d02b23d9d23fc8e132 (patch) | |
tree | 69534cbd4380ab151f607b4031fbfc54567b9aad /vendor/github.com/creack/pty/pty_linux.go | |
parent | 2dcc52abd066c968d007114f44c55ae8205ded5a (diff) |
go mod vendor
Diffstat (limited to 'vendor/github.com/creack/pty/pty_linux.go')
-rw-r--r-- | vendor/github.com/creack/pty/pty_linux.go | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/vendor/github.com/creack/pty/pty_linux.go b/vendor/github.com/creack/pty/pty_linux.go new file mode 100644 index 000000000..4a833de18 --- /dev/null +++ b/vendor/github.com/creack/pty/pty_linux.go @@ -0,0 +1,51 @@ +package pty + +import ( + "os" + "strconv" + "syscall" + "unsafe" +) + +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 + } + // In case of error after this point, make sure we close the ptmx fd. + defer func() { + if err != nil { + _ = p.Close() // Best effort. + } + }() + + sname, err := ptsname(p) + if err != nil { + return nil, nil, err + } + + if err := unlockpt(p); 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 _C_uint + err := ioctl(f.Fd(), syscall.TIOCGPTN, uintptr(unsafe.Pointer(&n))) + if err != nil { + return "", err + } + return "/dev/pts/" + strconv.Itoa(int(n)), nil +} + +func unlockpt(f *os.File) error { + var u _C_int + // use TIOCSPTLCK with a pointer to zero to clear the lock + return ioctl(f.Fd(), syscall.TIOCSPTLCK, uintptr(unsafe.Pointer(&u))) +} |