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    1: /* $OpenBSD$ */
    2: 
    3: /*
    4:  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
    5:  *
    6:  * Permission to use, copy, modify, and distribute this software for any
    7:  * purpose with or without fee is hereby granted, provided that the above
    8:  * copyright notice and this permission notice appear in all copies.
    9:  *
   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   14:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
   15:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
   16:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   17:  */
   18: 
   19: #include <sys/types.h>
   20: #include <sys/ioctl.h>
   21: #include <sys/time.h>
   22: #ifdef __OpenBSD__
   23: #include <sys/tty.h>
   24: #endif
   25: 
   26: #include <fcntl.h>
   27: #include <string.h>
   28: #include <termios.h>
   29: #include <unistd.h>
   30: 
   31: #include "compat.h"
   32: 
   33: int	pty_open(int *);
   34: pid_t	pty_fork(int, int *, char *, size_t, struct winsize *);
   35: 
   36: #ifdef __OpenBSD__
   37: int
   38: pty_open(int *fd)
   39: {
   40: 	*fd = open(PATH_PTMDEV, O_RDWR|O_CLOEXEC);
   41: 	if (*fd < 0)
   42: 	    return (-1);
   43: 	return (0);
   44: }
   45: #else
   46: int
   47: pty_open(__unused int *fd)
   48: {
   49: 	*fd = -1;
   50: 	return (0);
   51: }
   52: #endif
   53: 
   54: #ifdef __OpenBSD__
   55: pid_t
   56: pty_fork(int ptmfd, int *fd, char *name, size_t namelen, struct winsize *ws)
   57: {
   58: 	struct ptmget	ptm;
   59: 	pid_t		pid;
   60: 
   61: 	if (ioctl(ptmfd, PTMGET, &ptm) == -1)
   62: 		return (-1);
   63: 
   64: 	strlcpy(name, ptm.sn, namelen);
   65: 	ioctl(ptm.sfd, TIOCSWINSZ, ws);
   66: 
   67: 	switch (pid = fork()) {
   68: 	case -1:
   69: 		close(ptm.cfd);
   70: 		close(ptm.sfd);
   71: 		return (-1);
   72: 	case 0:
   73: 		close(ptm.cfd);
   74: 		login_tty(ptm.sfd);
   75: 		return (0);
   76: 	}
   77: 	*fd = ptm.cfd;
   78: 	close(ptm.sfd);
   79: 	return (pid);
   80: }
   81: #else
   82: pid_t
   83: pty_fork(__unused int ptmfd, int *fd, char *name, __unused size_t namelen,
   84:     struct winsize *ws)
   85: {
   86: 	return (forkpty(fd, name, NULL, ws));
   87: }
   88: #endif