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98d8dc64 | 1 | /* pause -- suspend the process until a signal arrives. POSIX.1 version. |
b168057a | 2 | Copyright (C) 2003-2015 Free Software Foundation, Inc. |
7e3be507 | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
7e3be507 | 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. | |
28f540f4 | 9 | |
7e3be507 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. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 | 18 | |
28f540f4 RM |
19 | #include <signal.h> |
20 | #include <unistd.h> | |
d102d699 | 21 | #include <sysdep-cancel.h> |
28f540f4 RM |
22 | |
23 | /* Suspend the process until a signal arrives. | |
24 | This always returns -1 and sets errno to EINTR. */ | |
b894c2ea | 25 | |
98d8dc64 RM |
26 | int |
27 | __libc_pause (void) | |
772e3426 UD |
28 | { |
29 | sigset_t set; | |
30 | ||
98d8dc64 RM |
31 | __sigemptyset (&set); |
32 | __sigprocmask (SIG_BLOCK, NULL, &set); | |
772e3426 | 33 | |
98d8dc64 RM |
34 | /* pause is a cancellation point, but so is sigsuspend. |
35 | So no need for anything special here. */ | |
28f540f4 | 36 | |
98d8dc64 | 37 | return __sigsuspend (&set); |
28f540f4 | 38 | } |
c4029823 | 39 | weak_alias (__libc_pause, pause) |
d102d699 RM |
40 | |
41 | LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */ | |
b894c2ea RM |
42 | |
43 | #ifndef NO_CANCELLATION | |
44 | # include <not-cancel.h> | |
45 | ||
46 | int | |
47 | __pause_nocancel (void) | |
48 | { | |
49 | sigset_t set; | |
50 | ||
51 | __sigemptyset (&set); | |
52 | __sigprocmask (SIG_BLOCK, NULL, &set); | |
53 | ||
54 | return sigsuspend_not_cancel (&set); | |
55 | } | |
56 | #endif |