| 1 | /* pause -- suspend the process until a signal arrives. POSIX.1 version. |
|---|---|
| 2 | Copyright (C) 2003-2024 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 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. |
| 9 | |
| 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 |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <signal.h> |
| 20 | #include <unistd.h> |
| 21 | #include <sysdep-cancel.h> |
| 22 | #include <sigsetops.h> |
| 23 | |
| 24 | /* Suspend the process until a signal arrives. |
| 25 | This always returns -1 and sets errno to EINTR. */ |
| 26 | |
| 27 | int |
| 28 | __libc_pause (void) |
| 29 | { |
| 30 | sigset_t set; |
| 31 | |
| 32 | __sigemptyset (set: &set); |
| 33 | __sigprocmask (SIG_BLOCK, NULL, &set); |
| 34 | |
| 35 | /* pause is a cancellation point, but so is sigsuspend. |
| 36 | So no need for anything special here. */ |
| 37 | |
| 38 | return __sigsuspend (&set); |
| 39 | } |
| 40 | weak_alias (__libc_pause, pause) |
| 41 |