| /* Copyright (C) 1997-2001,2003,2004,2006 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #include <string.h> /* Neede for string function builtin redirection. */ |
| #include <unistd.h> |
| |
| #include <sysdep.h> |
| #include <sys/syscall.h> |
| #include <bp-checks.h> |
| |
| #include <kernel-features.h> |
| |
| |
| /* The variable is shared between all wrappers around signal handling |
| functions which have RT equivalents. The definition is in sigaction.c. */ |
| extern int __libc_missing_rt_sigs; |
| |
| |
| /* Get and/or change the set of blocked signals. */ |
| int |
| __sigprocmask (how, set, oset) |
| int how; |
| const sigset_t *set; |
| sigset_t *oset; |
| { |
| #ifdef SIGCANCEL |
| sigset_t local_newmask; |
| |
| /* The only thing we have to make sure here is that SIGCANCEL and |
| SIGSETXID are not blocked. */ |
| if (set != NULL |
| && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) |
| # ifdef SIGSETXID |
| || __builtin_expect (__sigismember (set, SIGSETXID), 0) |
| # endif |
| )) |
| { |
| local_newmask = *set; |
| __sigdelset (&local_newmask, SIGCANCEL); |
| # ifdef SIGSETXID |
| __sigdelset (&local_newmask, SIGSETXID); |
| # endif |
| set = &local_newmask; |
| } |
| #endif |
| |
| #if __ASSUME_REALTIME_SIGNALS > 0 |
| return INLINE_SYSCALL (rt_sigprocmask, 4, how, CHECK_SIGSET_NULL_OK (set), |
| CHECK_SIGSET_NULL_OK (oset), _NSIG / 8); |
| #else |
| # ifdef __NR_rt_sigprocmask |
| /* First try the RT signals. */ |
| if (!__libc_missing_rt_sigs) |
| { |
| /* XXX The size argument hopefully will have to be changed to the |
| real size of the user-level sigset_t. */ |
| int saved_errno = errno; |
| int result = INLINE_SYSCALL (rt_sigprocmask, 4, how, |
| CHECK_SIGSET_NULL_OK (set), |
| CHECK_SIGSET_NULL_OK (oset), _NSIG / 8); |
| |
| if (result >= 0 || errno != ENOSYS) |
| return result; |
| |
| __set_errno (saved_errno); |
| __libc_missing_rt_sigs = 1; |
| } |
| # endif |
| |
| return INLINE_SYSCALL (sigprocmask, 3, how, CHECK_SIGSET_NULL_OK (set), |
| CHECK_SIGSET_NULL_OK (oset)); |
| #endif |
| } |
| weak_alias (__sigprocmask, sigprocmask) |