mirror of https://gogs.blitter.com/RLabs/xs
70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
//go:build netbsd
|
|
// +build netbsd
|
|
|
|
package pty
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"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 := grantpt(p); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
// In NetBSD unlockpt() does nothing, so it isn't called here.
|
|
|
|
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) {
|
|
/*
|
|
* from ptsname(3): The ptsname() function is equivalent to:
|
|
* struct ptmget pm;
|
|
* ioctl(fd, TIOCPTSNAME, &pm) == -1 ? NULL : pm.sn;
|
|
*/
|
|
var ptm ptmget
|
|
if err := ioctl(f.Fd(), uintptr(ioctl_TIOCPTSNAME), uintptr(unsafe.Pointer(&ptm))); err != nil {
|
|
return "", err
|
|
}
|
|
name := make([]byte, len(ptm.Sn))
|
|
for i, c := range ptm.Sn {
|
|
name[i] = byte(c)
|
|
if c == 0 {
|
|
return string(name[:i]), nil
|
|
}
|
|
}
|
|
return "", errors.New("TIOCPTSNAME string not NUL-terminated")
|
|
}
|
|
|
|
func grantpt(f *os.File) error {
|
|
/*
|
|
* from grantpt(3): Calling grantpt() is equivalent to:
|
|
* ioctl(fd, TIOCGRANTPT, 0);
|
|
*/
|
|
return ioctl(f.Fd(), uintptr(ioctl_TIOCGRANTPT), 0)
|
|
}
|