| /* Copyright (C) 1991-2016 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #include <stddef.h> |
| #include <unistd.h> |
| |
| |
| /* Change the set of blocked signals to SET, |
| wait until a signal arrives, and restore the set of blocked signals. */ |
| int |
| __sigsuspend (const sigset_t *set) |
| { |
| sigset_t oset; |
| int save; |
| |
| if (set == NULL) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| if (sigprocmask (SIG_SETMASK, set, &oset) < 0) |
| return -1; |
| |
| (void) pause(); |
| save = errno; |
| |
| if (sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL) < 0) |
| return -1; |
| |
| __set_errno (save); |
| return -1; |
| } |
| libc_hidden_def (__sigsuspend) |
| weak_alias (__sigsuspend, sigsuspend) |