| /* Copyright (C) 1991-2014 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/>. */ |
| |
| #ifndef _SIGNAL_H |
| # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." |
| #endif |
| |
| /* These definitions match those used by the 4.4 BSD kernel. |
| If the operating system has a `sigaction' system call that correctly |
| implements the POSIX.1 behavior, there should be a system-dependent |
| version of this file that defines `struct sigaction' and the `SA_*' |
| constants appropriately. */ |
| |
| /* Structure describing the action to be taken when a signal arrives. */ |
| struct sigaction |
| { |
| /* Signal handler. */ |
| #ifdef __USE_POSIX199309 |
| union |
| { |
| /* Used if SA_SIGINFO is not set. */ |
| __sighandler_t sa_handler; |
| /* Used if SA_SIGINFO is set. */ |
| void (*sa_sigaction) (int, siginfo_t *, void *); |
| } |
| __sigaction_handler; |
| # define sa_handler __sigaction_handler.sa_handler |
| # define sa_sigaction __sigaction_handler.sa_sigaction |
| #else |
| __sighandler_t sa_handler; |
| #endif |
| |
| /* Additional set of signals to be blocked. */ |
| __sigset_t sa_mask; |
| |
| /* Special flags. */ |
| int sa_flags; |
| }; |
| |
| /* Bits in `sa_flags'. */ |
| #if defined __USE_UNIX98 || defined __USE_MISC |
| # define SA_ONSTACK 0x0001 /* Take signal on signal stack. */ |
| #endif |
| #if defined __USE_UNIX98 || defined __USE_MISC || defined __USE_XOPEN2K8 |
| # define SA_RESTART 0x0002 /* Restart syscall on signal return. */ |
| # define SA_NODEFER 0x0010 /* Don't automatically block the signal when |
| its handler is being executed. */ |
| # define SA_RESETHAND 0x0004 /* Reset to SIG_DFL on entry to handler. */ |
| #endif |
| #define SA_NOCLDSTOP 0x0008 /* Don't send SIGCHLD when children stop. */ |
| |
| #ifdef __USE_MISC |
| # define SA_INTERRUPT 0 /* Historical no-op ("not SA_RESTART"). */ |
| |
| /* Some aliases for the SA_ constants. */ |
| # define SA_NOMASK SA_NODEFER |
| # define SA_ONESHOT SA_RESETHAND |
| # define SA_STACK SA_ONSTACK |
| #endif |
| |
| |
| /* Values for the HOW argument to `sigprocmask'. */ |
| #define SIG_BLOCK 1 /* Block signals. */ |
| #define SIG_UNBLOCK 2 /* Unblock signals. */ |
| #define SIG_SETMASK 3 /* Set the set of blocked signals. */ |
