/usr/share/gocode/src/github.com/kr/pty/pty_freebsd.go is in golang-github-kr-pty-dev 0.0~git20151007.0.f7ee69f-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 | package pty
import (
"errors"
"os"
"syscall"
"unsafe"
)
func posix_openpt(oflag int) (fd int, err error) {
r0, _, e1 := syscall.Syscall(syscall.SYS_POSIX_OPENPT, uintptr(oflag), 0, 0)
fd = int(r0)
if e1 != 0 {
err = e1
}
return
}
func open() (pty, tty *os.File, err error) {
fd, err := posix_openpt(syscall.O_RDWR | syscall.O_CLOEXEC)
if err != nil {
return nil, nil, err
}
p := os.NewFile(uintptr(fd), "/dev/pts")
sname, err := ptsname(p)
if err != nil {
return nil, nil, err
}
t, err := os.OpenFile("/dev/"+sname, os.O_RDWR, 0)
if err != nil {
return nil, nil, err
}
return p, t, nil
}
func isptmaster(fd uintptr) (bool, error) {
err := ioctl(fd, syscall.TIOCPTMASTER, 0)
return err == nil, err
}
var (
emptyFiodgnameArg fiodgnameArg
ioctl_FIODGNAME = _IOW('f', 120, unsafe.Sizeof(emptyFiodgnameArg))
)
func ptsname(f *os.File) (string, error) {
master, err := isptmaster(f.Fd())
if err != nil {
return "", err
}
if !master {
return "", syscall.EINVAL
}
const n = _C_SPECNAMELEN + 1
var (
buf = make([]byte, n)
arg = fiodgnameArg{Len: n, Buf: (*byte)(unsafe.Pointer(&buf[0]))}
)
err = ioctl(f.Fd(), ioctl_FIODGNAME, uintptr(unsafe.Pointer(&arg)))
if err != nil {
return "", err
}
for i, c := range buf {
if c == 0 {
return string(buf[:i]), nil
}
}
return "", errors.New("FIODGNAME string not NUL-terminated")
}
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