| /* Copyright (C) 2007-2014 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 <errno.h> |
| #include <signal.h> |
| #include <sys/signalfd.h> |
| #include <sysdep.h> |
| #include <kernel-features.h> |
| |
| |
| int |
| signalfd (int fd, const sigset_t *mask, int flags) |
| { |
| #ifdef __NR_signalfd4 |
| int res = INLINE_SYSCALL (signalfd4, 4, fd, mask, _NSIG / 8, flags); |
| # ifndef __ASSUME_SIGNALFD4 |
| if (res != -1 || errno != ENOSYS) |
| # endif |
| return res; |
| #endif |
| |
| #ifndef __ASSUME_SIGNALFD4 |
| /* The old system call has no flag parameter which is bad. So we have |
| to wait until we have to support to pass additional values to the |
| kernel (sys_indirect) before implementing setting flags like |
| O_NONBLOCK etc. */ |
| if (flags != 0) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| # ifdef __NR_signalfd |
| return INLINE_SYSCALL (signalfd, 3, fd, mask, _NSIG / 8); |
| # else |
| __set_errno (ENOSYS); |
| return -1; |
| # endif |
| #elif !defined __NR_signalfd4 |
| # error "__ASSUME_SIGNALFD4 defined but not __NR_signalfd4" |
| #endif |
| } |