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688903eb | 1 | /* Copyright (C) 1991-2018 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
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5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
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8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
478b92f0 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 17 | |
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18 | #include <errno.h> |
19 | #include <signal.h> | |
20 | #include <stddef.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | ||
24 | /* Change the set of blocked signals to SET, | |
25 | wait until a signal arrives, and restore the set of blocked signals. */ | |
26 | int | |
bd2260a2 | 27 | __sigsuspend (const sigset_t *set) |
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28 | { |
29 | sigset_t oset; | |
30 | int save; | |
31 | ||
32 | if (set == NULL) | |
33 | { | |
c4029823 | 34 | __set_errno (EINVAL); |
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35 | return -1; |
36 | } | |
37 | ||
c4029823 | 38 | if (sigprocmask (SIG_SETMASK, set, &oset) < 0) |
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39 | return -1; |
40 | ||
41 | (void) pause(); | |
42 | save = errno; | |
43 | ||
c4029823 | 44 | if (sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL) < 0) |
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45 | return -1; |
46 | ||
c4029823 | 47 | __set_errno (save); |
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48 | return -1; |
49 | } | |
37ba7d66 | 50 | libc_hidden_def (__sigsuspend) |
a9ddb793 | 51 | weak_alias (__sigsuspend, sigsuspend) |