1 /* $OpenBSD: signal.h,v 1.29 2018/04/18 16:05:20 deraadt Exp $ */ 2 /* $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1989, 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)signal.h 8.2 (Berkeley) 1/21/94 38 */ 39 40 #ifndef _SYS_SIGNAL_H_ 41 #define _SYS_SIGNAL_H_ 42 43 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ 44 45 #define _NSIG 33 /* counting 0 (mask is 1-32) */ 46 47 #if __BSD_VISIBLE 48 #define NSIG _NSIG 49 #endif 50 51 #define SIGHUP 1 /* hangup */ 52 #define SIGINT 2 /* interrupt */ 53 #define SIGQUIT 3 /* quit */ 54 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 55 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 56 #define SIGABRT 6 /* abort() */ 57 #if __BSD_VISIBLE 58 #define SIGIOT SIGABRT /* compatibility */ 59 #define SIGEMT 7 /* EMT instruction */ 60 #endif 61 #define SIGFPE 8 /* floating point exception */ 62 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 63 #define SIGBUS 10 /* bus error */ 64 #define SIGSEGV 11 /* segmentation violation */ 65 #define SIGSYS 12 /* bad argument to system call */ 66 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 67 #define SIGALRM 14 /* alarm clock */ 68 #define SIGTERM 15 /* software termination signal from kill */ 69 #define SIGURG 16 /* urgent condition on IO channel */ 70 #define SIGSTOP 17 /* sendable stop signal not from tty */ 71 #define SIGTSTP 18 /* stop signal from tty */ 72 #define SIGCONT 19 /* continue a stopped process */ 73 #define SIGCHLD 20 /* to parent on child stop or exit */ 74 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 75 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 76 #if __BSD_VISIBLE 77 #define SIGIO 23 /* input/output possible signal */ 78 #endif 79 #define SIGXCPU 24 /* exceeded CPU time limit */ 80 #define SIGXFSZ 25 /* exceeded file size limit */ 81 #define SIGVTALRM 26 /* virtual time alarm */ 82 #define SIGPROF 27 /* profiling time alarm */ 83 #if __BSD_VISIBLE 84 #define SIGWINCH 28 /* window size changes */ 85 #define SIGINFO 29 /* information request */ 86 #endif 87 #define SIGUSR1 30 /* user defined signal 1 */ 88 #define SIGUSR2 31 /* user defined signal 2 */ 89 #if __BSD_VISIBLE 90 #define SIGTHR 32 /* thread library AST */ 91 #endif 92 93 /* 94 * Language spec says we must list exactly one parameter, even though we 95 * actually supply three. Ugh! 96 */ 97 #define SIG_DFL (void (*)(int))0 98 #define SIG_IGN (void (*)(int))1 99 #define SIG_ERR (void (*)(int))-1 100 101 #if __POSIX_VISIBLE || __XPG_VISIBLE 102 #ifndef _SIGSET_T_DEFINED_ 103 #define _SIGSET_T_DEFINED_ 104 typedef unsigned int sigset_t; 105 #endif 106 107 #include <sys/siginfo.h> 108 109 /* 110 * Signal vector "template" used in sigaction call. 111 */ 112 struct sigaction { 113 union { /* signal handler */ 114 void (*__sa_handler)(int); 115 void (*__sa_sigaction)(int, siginfo_t *, void *); 116 } __sigaction_u; 117 sigset_t sa_mask; /* signal mask to apply */ 118 int sa_flags; /* see signal options below */ 119 }; 120 121 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 122 #define sa_handler __sigaction_u.__sa_handler 123 #define sa_sigaction __sigaction_u.__sa_sigaction 124 125 #if __XPG_VISIBLE >= 500 126 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 127 #define SA_RESTART 0x0002 /* restart system on signal return */ 128 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 129 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 130 #define SA_NOCLDWAIT 0x0020 /* don't create zombies (assign to pid 1) */ 131 #endif /* __XPG_VISIBLE >= 500 */ 132 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 133 #if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500 134 #define SA_SIGINFO 0x0040 /* generate siginfo_t */ 135 #endif 136 137 /* 138 * Flags for sigprocmask: 139 */ 140 #define SIG_BLOCK 1 /* block specified signal set */ 141 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 142 #define SIG_SETMASK 3 /* set specified signal set */ 143 #endif /* __POSIX_VISIBLE || __XPG_VISIBLE */ 144 145 #if __BSD_VISIBLE 146 typedef void (*sig_t)(int); /* type of signal function */ 147 148 /* 149 * 4.3 compatibility: 150 * Signal vector "template" used in sigvec call. 151 */ 152 struct sigvec { 153 void (*sv_handler)(int); /* signal handler */ 154 int sv_mask; /* signal mask to apply */ 155 int sv_flags; /* see signal options below */ 156 }; 157 #define SV_ONSTACK SA_ONSTACK 158 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 159 #define SV_RESETHAND SA_RESETHAND 160 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 161 162 /* 163 * Macro for converting signal number to a mask suitable for 164 * sigblock(). 165 */ 166 #define sigmask(m) (1U << ((m)-1)) 167 168 #define BADSIG SIG_ERR 169 170 #endif /* __BSD_VISIBLE */ 171 172 #if __BSD_VISIBLE || __XPG_VISIBLE >= 420 173 /* 174 * Structure used in sigaltstack call. 175 */ 176 typedef struct sigaltstack { 177 void *ss_sp; /* signal stack base */ 178 size_t ss_size; /* signal stack length */ 179 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 180 } stack_t; 181 #define SS_ONSTACK 0x0001 /* take signals on alternate stack */ 182 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 183 #define MINSIGSTKSZ (3U << _MAX_PAGE_SHIFT) /* minimum allowable stack */ 184 #if _MAX_PAGE_SHIFT < 14 /* recommended stack size */ 185 #define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 4) 186 #else 187 #define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 2) 188 #endif 189 190 typedef struct sigcontext ucontext_t; 191 #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */ 192 193 #ifndef _KERNEL 194 /* 195 * For historical reasons; programs expect signal's return value to be 196 * defined by <sys/signal.h>. 197 */ 198 __BEGIN_DECLS 199 void (*signal(int, void (*)(int)))(int); 200 __END_DECLS 201 #endif /* !_KERNEL */ 202 #endif /* !_SYS_SIGNAL_H_ */ 203