1 /* The proper definitions for Linux/SPARC sigaction. 2 Copyright (C) 1996-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _BITS_SIGACTION_H 20 #define _BITS_SIGACTION_H 1 21 22 #ifndef _SIGNAL_H 23 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." 24 #endif 25 26 #include <bits/wordsize.h> 27 28 /* Structure describing the action to be taken when a signal arrives. */ 29 struct sigaction 30 { 31 /* Signal handler. */ 32 #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED 33 union 34 { 35 /* Used if SA_SIGINFO is not set. */ 36 __sighandler_t sa_handler; 37 /* Used if SA_SIGINFO is set. */ 38 void (*sa_sigaction) (int, siginfo_t *, void *); 39 } 40 __sigaction_handler; 41 # define sa_handler __sigaction_handler.sa_handler 42 # define sa_sigaction __sigaction_handler.sa_sigaction 43 #else 44 __sighandler_t sa_handler; 45 #endif 46 47 /* Additional set of signals to be blocked. */ 48 __sigset_t sa_mask; 49 50 /* Special flags. */ 51 #if __WORDSIZE == 64 52 int __glibc_reserved0; 53 #endif 54 int sa_flags; 55 56 /* Not used by Linux/Sparc yet. */ 57 void (*sa_restorer) (void); 58 }; 59 60 61 /* Bits in `sa_flags'. */ 62 #define SA_NOCLDSTOP 0x00000008 /* Don't send SIGCHLD when children stop. */ 63 #define SA_NOCLDWAIT 0x00000100 /* Don't create zombie on child death. */ 64 #define SA_SIGINFO 0x00000200 /* Invoke signal-catching function with 65 three arguments instead of one. */ 66 #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC 67 # define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */ 68 #endif 69 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 70 # define SA_RESTART 0x00000002 /* Restart syscall on signal return. */ 71 # define SA_NODEFER 0x00000020 /* Don't automatically block the signal when 72 its handler is being executed. */ 73 # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler. */ 74 #endif 75 #ifdef __USE_MISC 76 # define SA_INTERRUPT 0x00000010 /* Historical no-op. */ 77 78 /* Some aliases for the SA_ constants. */ 79 # define SA_NOMASK SA_NODEFER 80 # define SA_ONESHOT SA_RESETHAND 81 # define SA_STACK SA_ONSTACK 82 #endif 83 84 /* Values for the HOW argument to `sigprocmask'. */ 85 #define SIG_BLOCK 1 /* Block signals. */ 86 #define SIG_UNBLOCK 2 /* Unblock signals. */ 87 #define SIG_SETMASK 4 /* Set the set of blocked signals. */ 88 89 #endif