| /* Copyright (C) 1992-2014 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 <stddef.h> |
| #include <signal.h> |
| #include <errno.h> |
| |
| /* If INTERRUPT is nonzero, make signal SIG interrupt system calls |
| (causing them to fail with EINTR); if INTERRUPT is zero, make system |
| calls be restarted after signal SIG. */ |
| int |
| siginterrupt (sig, interrupt) |
| int sig; |
| int interrupt; |
| { |
| #ifdef SA_RESTART |
| extern sigset_t _sigintr attribute_hidden; /* Defined in signal.c. */ |
| struct sigaction action; |
| |
| if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0) |
| return -1; |
| |
| if (interrupt) |
| { |
| __sigaddset (&_sigintr, sig); |
| action.sa_flags &= ~SA_RESTART; |
| } |
| else |
| { |
| __sigdelset (&_sigintr, sig); |
| action.sa_flags |= SA_RESTART; |
| } |
| |
| if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0) |
| return -1; |
| |
| return 0; |
| #else |
| __set_errno (ENOSYS); |
| return -1; |
| #endif |
| } |