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d614a753 | 1 | /* Copyright (C) 1998-2020 Free Software Foundation, Inc. |
ae1025be | 2 | This file is part of the GNU C Library. |
6591c335 | 3 | Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998. |
46d7de19 | 4 | |
ae1025be | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
46d7de19 | 9 | |
ae1025be UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
46d7de19 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
46d7de19 | 18 | |
9b3c7c3c | 19 | #include <paths.h> |
6591c335 | 20 | #include <stdlib.h> |
9b3c7c3c | 21 | #include <string.h> |
6591c335 | 22 | #include <unistd.h> |
46d7de19 | 23 | |
6591c335 | 24 | |
9b3c7c3c UD |
25 | /* Unlock the slave pseudo terminal associated with the master pseudo |
26 | terminal specified by FD. */ | |
6591c335 | 27 | int |
9b3c7c3c | 28 | unlockpt (int fd) |
6591c335 | 29 | { |
9b3c7c3c | 30 | char buf[sizeof (_PATH_TTY) + 2]; |
6591c335 | 31 | |
9b3c7c3c UD |
32 | /* BSD doesn't have a lock, but it does have `revoke'. */ |
33 | if (__ptsname_r (fd, buf, sizeof (buf))) | |
6591c335 | 34 | return -1; |
52a1f181 | 35 | return __revoke (buf); |
6591c335 | 36 | } |