github.com/dolfly/pty@v1.2.1/pty_openbsd.go (about)

     1  //go:build openbsd
     2  //+build openbsd
     3  
     4  package pty
     5  
     6  import (
     7  	"os"
     8  	"syscall"
     9  	"unsafe"
    10  )
    11  
    12  func open() (pty, tty *os.File, err error) {
    13  	/*
    14  	 * from ptm(4):
    15  	 * The PTMGET command allocates a free pseudo terminal, changes its
    16  	 * ownership to the caller, revokes the access privileges for all previous
    17  	 * users, opens the file descriptors for the pty and tty devices and
    18  	 * returns them to the caller in struct ptmget.
    19  	 */
    20  
    21  	p, err := os.OpenFile("/dev/ptm", os.O_RDWR|syscall.O_CLOEXEC, 0)
    22  	if err != nil {
    23  		return nil, nil, err
    24  	}
    25  	defer p.Close()
    26  
    27  	var ptm ptmget
    28  	if err := ioctl(p.Fd(), uintptr(ioctl_PTMGET), uintptr(unsafe.Pointer(&ptm))); err != nil {
    29  		return nil, nil, err
    30  	}
    31  
    32  	pty = os.NewFile(uintptr(ptm.Cfd), "/dev/ptm")
    33  	tty = os.NewFile(uintptr(ptm.Sfd), "/dev/ptm")
    34  
    35  	return pty, tty, nil
    36  }