2 * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org>
5 * Portions of this software were developed under sponsorship from Snow
6 * B.V., the Netherlands.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 #include "namespace.h"
36 #include <sys/param.h>
37 #include <sys/ioctl.h>
42 #include "un-namespace.h"
45 * __isptmaster(): return whether the file descriptor refers to a
46 * pseudo-terminal master device.
49 __isptmaster(int fildes)
52 if (_ioctl(fildes, TIOCPTMASTER) == 0)
62 * In our implementation, grantpt() and unlockpt() don't actually have
63 * any use, because PTY's are created on the fly and already have proper
64 * permissions upon creation.
66 * Just make sure `fildes' actually points to a real PTY master device.
68 __strong_reference(__isptmaster, grantpt);
69 __strong_reference(__isptmaster, unlockpt);
72 * ptsname(): return the pathname of the slave pseudo-terminal device
73 * associated with the specified master.
78 static char pt_slave[sizeof _PATH_DEV + SPECNAMELEN] = _PATH_DEV;
81 /* Make sure fildes points to a master device. */
82 if (__isptmaster(fildes) != 0)
85 if (fdevname_r(fildes, pt_slave + (sizeof _PATH_DEV - 1),
86 sizeof pt_slave - (sizeof _PATH_DEV - 1)) != NULL)