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//go:build freebsd && cgo
package chroot
// #include <fcntl.h>
// #include <stdlib.h>
import "C"
import (
"github.com/sirupsen/logrus"
"golang.org/x/sys/unix"
)
func openpt() (int, error) {
fd, err := C.posix_openpt(C.O_RDWR)
if err != nil {
return -1, err
}
if _, err := C.grantpt(fd); err != nil {
return -1, err
}
return int(fd), nil
}
func ptsname(fd int) (string, error) {
path, err := C.ptsname(C.int(fd))
if err != nil {
return "", err
}
return C.GoString(path), nil
}
func unlockpt(fd int) error {
if _, err := C.unlockpt(C.int(fd)); err != nil {
return err
}
return nil
}
func getPtyDescriptors() (int, int, error) {
// Create a pseudo-terminal and open the control side
controlFd, err := openpt()
if err != nil {
logrus.Errorf("error opening PTY control side using posix_openpt: %v", err)
return -1, -1, err
}
if err = unlockpt(controlFd); err != nil {
logrus.Errorf("error unlocking PTY: %v", err)
return -1, -1, err
}
// Get a handle for the other end.
ptyName, err := ptsname(controlFd)
if err != nil {
logrus.Errorf("error getting PTY name: %v", err)
return -1, -1, err
}
ptyFd, err := unix.Open(ptyName, unix.O_RDWR, 0)
if err != nil {
logrus.Errorf("error opening PTY: %v", err)
return -1, -1, err
}
return controlFd, ptyFd, nil
}
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