1 /* $NetBSD: signal.h,v 1.70 2016/06/15 12:10:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)signal.h 8.4 (Berkeley) 5/4/95 37 */ 38 39 #ifndef _SYS_SIGNAL_H_ 40 #define _SYS_SIGNAL_H_ 41 42 #include <sys/featuretest.h> 43 #include <sys/sigtypes.h> 44 45 #define _NSIG 64 46 47 #if defined(_NETBSD_SOURCE) 48 #define NSIG _NSIG 49 50 #endif /* _NETBSD_SOURCE */ 51 52 #define SIGHUP 1 /* hangup */ 53 #define SIGINT 2 /* interrupt */ 54 #define SIGQUIT 3 /* quit */ 55 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 56 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 57 #define SIGABRT 6 /* abort() */ 58 #define SIGIOT SIGABRT /* compatibility */ 59 #define SIGEMT 7 /* EMT instruction */ 60 #define SIGFPE 8 /* floating point exception */ 61 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 62 #define SIGBUS 10 /* bus error */ 63 #define SIGSEGV 11 /* segmentation violation */ 64 #define SIGSYS 12 /* bad argument to system call */ 65 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 66 #define SIGALRM 14 /* alarm clock */ 67 #define SIGTERM 15 /* software termination signal from kill */ 68 #define SIGURG 16 /* urgent condition on IO channel */ 69 #define SIGSTOP 17 /* sendable stop signal not from tty */ 70 #define SIGTSTP 18 /* stop signal from tty */ 71 #define SIGCONT 19 /* continue a stopped process */ 72 #define SIGCHLD 20 /* to parent on child stop or exit */ 73 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 74 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 75 #define SIGIO 23 /* input/output possible signal */ 76 #define SIGXCPU 24 /* exceeded CPU time limit */ 77 #define SIGXFSZ 25 /* exceeded file size limit */ 78 #define SIGVTALRM 26 /* virtual time alarm */ 79 #define SIGPROF 27 /* profiling time alarm */ 80 #define SIGWINCH 28 /* window size changes */ 81 #define SIGINFO 29 /* information request */ 82 #define SIGUSR1 30 /* user defined signal 1 */ 83 #define SIGUSR2 31 /* user defined signal 2 */ 84 #define SIGPWR 32 /* power fail/restart (not reset when caught) */ 85 #ifdef _KERNEL 86 #define SIGRTMIN 33 /* Kernel only; not exposed to userland yet */ 87 #define SIGRTMAX 63 /* Kernel only; not exposed to userland yet */ 88 #endif 89 90 #ifndef _KERNEL 91 #include <sys/cdefs.h> 92 #endif 93 94 #define SIG_DFL ((void (*)(int)) 0) 95 #define SIG_IGN ((void (*)(int)) 1) 96 #define SIG_ERR ((void (*)(int)) -1) 97 #define SIG_HOLD ((void (*)(int)) 3) 98 99 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \ 100 defined(_NETBSD_SOURCE) 101 102 #ifdef _KERNEL 103 #define sigaddset(s, n) __sigaddset(s, n) 104 #define sigdelset(s, n) __sigdelset(s, n) 105 #define sigismember(s, n) __sigismember(s, n) 106 #define sigemptyset(s) __sigemptyset(s) 107 #define sigfillset(s) __sigfillset(s) 108 #define sigplusset(s, t) __sigplusset(s, t) 109 #define sigminusset(s, t) __sigminusset(s, t) 110 #endif /* _KERNEL */ 111 112 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 113 defined(_NETBSD_SOURCE) 114 #include <sys/siginfo.h> 115 #endif 116 117 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 118 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 119 #include <sys/ucontext.h> 120 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ 121 122 /* 123 * Signal vector "template" used in sigaction call. 124 */ 125 struct sigaction { 126 union { 127 void (*_sa_handler)(int); 128 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 129 defined(_NETBSD_SOURCE) 130 void (*_sa_sigaction)(int, siginfo_t *, void *); 131 #endif 132 } _sa_u; /* signal handler */ 133 sigset_t sa_mask; /* signal mask to apply */ 134 int sa_flags; /* see signal options below */ 135 }; 136 137 #define sa_handler _sa_u._sa_handler 138 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 139 defined(_NETBSD_SOURCE) 140 #define sa_sigaction _sa_u._sa_sigaction 141 #endif 142 143 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ 144 145 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 146 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 147 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 148 #define SA_RESTART 0x0002 /* restart system call on signal return */ 149 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 150 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 151 #endif /* _XOPEN_SOURCE_EXTENDED || XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ 152 /* Only valid for SIGCHLD. */ 153 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 154 #define SA_NOCLDWAIT 0x0020 /* do not generate zombies on unwaited child */ 155 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 156 defined(_NETBSD_SOURCE) 157 #define SA_SIGINFO 0x0040 /* take sa_sigaction handler */ 158 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ 159 #if defined(_NETBSD_SOURCE) 160 #define SA_NOKERNINFO 0x0080 /* siginfo does not print kernel info on tty */ 161 #endif /*_NETBSD_SOURCE */ 162 #ifdef _KERNEL 163 #define SA_ALLBITS 0x00ff 164 #endif 165 166 /* 167 * Flags for sigprocmask(): 168 */ 169 #define SIG_BLOCK 1 /* block specified signal set */ 170 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 171 #define SIG_SETMASK 3 /* set specified signal set */ 172 173 #if defined(_NETBSD_SOURCE) 174 typedef void (*sig_t)(int); /* type of signal function */ 175 #endif 176 177 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 178 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 179 /* 180 * Flags used with stack_t/struct sigaltstack. 181 */ 182 #define SS_ONSTACK 0x0001 /* take signals on alternate stack */ 183 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 184 #ifdef _KERNEL 185 #define SS_ALLBITS 0x0005 186 #endif 187 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 188 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 189 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ 190 191 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 192 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 193 /* 194 * Structure used in sigstack call. 195 */ 196 struct sigstack { 197 void *ss_sp; /* signal stack pointer */ 198 int ss_onstack; /* current status */ 199 }; 200 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ 201 202 #if defined(_NETBSD_SOURCE) && !defined(_KERNEL) 203 /* 204 * Macro for converting signal number to a mask suitable for 205 * sigblock(). 206 */ 207 #define sigmask(n) __sigmask(n) 208 209 #define BADSIG SIG_ERR 210 #endif /* _NETBSD_SOURCE */ 211 212 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 213 defined(_NETBSD_SOURCE) 214 struct sigevent { 215 int sigev_notify; 216 int sigev_signo; 217 union sigval sigev_value; 218 void (*sigev_notify_function)(union sigval); 219 void /* pthread_attr_t */ *sigev_notify_attributes; 220 }; 221 222 #define SIGEV_NONE 0 223 #define SIGEV_SIGNAL 1 224 #define SIGEV_THREAD 2 225 #if defined(_NETBSD_SOURCE) 226 #define SIGEV_SA 3 227 #endif 228 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ 229 230 #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */ 231 232 /* 233 * For historical reasons; programs expect signal's return value to be 234 * defined by <sys/signal.h>. 235 */ 236 __BEGIN_DECLS 237 void (*signal(int, void (*)(int)))(int); 238 void (*bsd_signal(int, void (*)(int)))(int); 239 #if (_POSIX_C_SOURCE - 0) >= 200112L || defined(_NETBSD_SOURCE) 240 int sigqueue(pid_t, int, const union sigval); 241 #endif 242 #if defined(_NETBSD_SOURCE) 243 int sigqueueinfo(pid_t, const siginfo_t *); 244 #endif 245 __END_DECLS 246 #endif /* !_SYS_SIGNAL_H_ */ 247