1 /* 2 Copyright (c) 1982, 1986, 1993 3 The Regents of the University of California. All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 1. Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 2. Redistributions in binary form must reproduce the above copyright 11 notice, this list of conditions and the following disclaimer in the 12 documentation and/or other materials provided with the distribution. 13 3. Neither the name of the University nor the names of its contributors 14 may be used to endorse or promote products derived from this software 15 without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 SUCH DAMAGE. 28 */ 29 /* sys/signal.h */ 30 31 #ifndef _SYS_SIGNAL_H 32 #define _SYS_SIGNAL_H 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #include "_ansi.h" 38 #include <sys/cdefs.h> 39 #include <sys/features.h> 40 #include <sys/types.h> 41 #include <sys/_sigset.h> 42 #include <sys/_timespec.h> 43 #include <stdint.h> 44 45 #if !defined(_SIGSET_T_DECLARED) 46 #define _SIGSET_T_DECLARED 47 typedef __sigset_t sigset_t; 48 #endif 49 50 #if defined(__CYGWIN__) 51 #include <cygwin/signal.h> 52 #else 53 54 #if defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 55 56 /* sigev_notify values 57 NOTE: P1003.1c/D10, p. 34 adds SIGEV_THREAD. */ 58 59 #define SIGEV_NONE 1 /* No asynchronous notification shall be delivered */ 60 /* when the event of interest occurs. */ 61 #define SIGEV_SIGNAL 2 /* A queued signal, with an application defined */ 62 /* value, shall be delivered when the event of */ 63 /* interest occurs. */ 64 #define SIGEV_THREAD 3 /* A notification function shall be called to */ 65 /* perform notification. */ 66 67 /* Signal Generation and Delivery, P1003.1b-1993, p. 63 68 NOTE: P1003.1c/D10, p. 34 adds sigev_notify_function and 69 sigev_notify_attributes to the sigevent structure. */ 70 71 union sigval { 72 int sival_int; /* Integer signal value */ 73 void *sival_ptr; /* Pointer signal value */ 74 }; 75 76 struct sigevent { 77 int sigev_notify; /* Notification type */ 78 int sigev_signo; /* Signal number */ 79 union sigval sigev_value; /* Signal value */ 80 81 }; 82 83 /* Signal Actions, P1003.1b-1993, p. 64 */ 84 /* si_code values, p. 66 */ 85 86 #define SI_USER 1 /* Sent by a user. kill(), abort(), etc */ 87 #define SI_QUEUE 2 /* Sent by sigqueue() */ 88 #define SI_TIMER 3 /* Sent by expiration of a timer_settime() timer */ 89 #define SI_ASYNCIO 4 /* Indicates completion of asycnhronous IO */ 90 #define SI_MESGQ 5 /* Indicates arrival of a message at an empty queue */ 91 92 typedef struct { 93 int si_signo; /* Signal number */ 94 int si_code; /* Cause of the signal */ 95 union sigval si_value; /* Signal value */ 96 } siginfo_t; 97 #endif /* defined(_POSIX_REALTIME_SIGNALS) || __POSIX_VISIBLE >= 199309 */ 98 99 #if defined(__rtems__) 100 101 /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 */ 102 103 #define SA_NOCLDSTOP 0x1 /* Do not generate SIGCHLD when children stop */ 104 #define SA_SIGINFO 0x2 /* Invoke the signal catching function with */ 105 /* three arguments instead of one. */ 106 #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 107 #define SA_ONSTACK 0x4 /* Signal delivery will be on a separate stack. */ 108 #endif 109 110 /* struct sigaction notes from POSIX: 111 * 112 * (1) Routines stored in sa_handler should take a single int as 113 * their argument although the POSIX standard does not require this. 114 * This is not longer true since at least POSIX.1-2008 115 * (2) The fields sa_handler and sa_sigaction may overlap, and a conforming 116 * application should not use both simultaneously. 117 */ 118 119 typedef void (*_sig_func_ptr)(int); 120 121 struct sigaction { 122 int sa_flags; /* Special flags to affect behavior of signal */ 123 sigset_t sa_mask; /* Additional set of signals to be blocked */ 124 /* during execution of signal-catching */ 125 /* function. */ 126 union { 127 _sig_func_ptr _handler; /* SIG_DFL, SIG_IGN, or pointer to a function */ 128 #if defined(_POSIX_REALTIME_SIGNALS) 129 void (*_sigaction)( int, siginfo_t *, void * ); 130 #endif 131 } _signal_handlers; 132 }; 133 134 #define sa_handler _signal_handlers._handler 135 #if defined(_POSIX_REALTIME_SIGNALS) 136 #define sa_sigaction _signal_handlers._sigaction 137 #endif 138 139 #else /* defined(__rtems__) */ 140 141 #define SA_NOCLDSTOP 1 /* only value supported now for sa_flags */ 142 143 typedef void (*_sig_func_ptr)(int); 144 145 struct sigaction 146 { 147 _sig_func_ptr sa_handler; 148 sigset_t sa_mask; 149 int sa_flags; 150 }; 151 #endif /* defined(__rtems__) */ 152 #endif /* defined(__CYGWIN__) */ 153 154 #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 155 /* 156 * Minimum and default signal stack constants. Allow for target overrides 157 * from <sys/features.h>. 158 */ 159 #ifndef MINSIGSTKSZ 160 #define MINSIGSTKSZ 2048 161 #endif 162 #ifndef SIGSTKSZ 163 #define SIGSTKSZ 8192 164 #endif 165 166 /* 167 * Possible values for ss_flags in stack_t below. 168 */ 169 #define SS_ONSTACK 0x1 170 #define SS_DISABLE 0x2 171 172 #endif 173 174 /* 175 * Structure used in sigaltstack call. 176 */ 177 typedef struct sigaltstack { 178 void *ss_sp; /* Stack base or pointer. */ 179 int ss_flags; /* Flags. */ 180 size_t ss_size; /* Stack size. */ 181 } stack_t; 182 183 #if __POSIX_VISIBLE 184 #define SIG_SETMASK 0 /* set mask with sigprocmask() */ 185 #define SIG_BLOCK 1 /* set of signals to block */ 186 #define SIG_UNBLOCK 2 /* set of signals to, well, unblock */ 187 188 int sigprocmask (int, const sigset_t *, sigset_t *); 189 #endif 190 191 #if __POSIX_VISIBLE >= 199506 192 int pthread_sigmask (int, const sigset_t *, sigset_t *); 193 #endif 194 195 #if __POSIX_VISIBLE 196 int kill (pid_t, int); 197 #endif 198 199 #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 200 int killpg (pid_t, int); 201 #endif 202 #if __POSIX_VISIBLE 203 int sigaction (int, const struct sigaction *, struct sigaction *); 204 int sigaddset (sigset_t *, const int); 205 int sigdelset (sigset_t *, const int); 206 int sigismember (const sigset_t *, int); 207 int sigfillset (sigset_t *); 208 int sigemptyset (sigset_t *); 209 int sigpending (sigset_t *); 210 int sigsuspend (const sigset_t *); 211 int sigwait (const sigset_t *, int *); 212 213 #if !defined(__CYGWIN__) && !defined(__rtems__) 214 /* These depend upon the type of sigset_t, which right now 215 is always a long.. They're in the POSIX namespace, but 216 are not ANSI. */ 217 #define sigaddset(what,sig) (*(what) |= (1<<(sig)), 0) 218 #define sigdelset(what,sig) (*(what) &= ~(1<<(sig)), 0) 219 #define sigemptyset(what) (*(what) = 0, 0) 220 #define sigfillset(what) (*(what) = ~(0), 0) 221 #define sigismember(what,sig) (((*(what)) & (1<<(sig))) != 0) 222 #endif /* !__CYGWIN__ && !__rtems__ */ 223 #endif /* __POSIX_VISIBLE */ 224 225 /* There are two common sigpause variants, both of which take an int argument. 226 If you request _XOPEN_SOURCE or _GNU_SOURCE, you get the System V version, 227 which removes the given signal from the process's signal mask; otherwise 228 you get the BSD version, which sets the process's signal mask to the given 229 value. */ 230 #if __XSI_VISIBLE && !defined(__INSIDE_CYGWIN__) 231 # ifdef __GNUC__ 232 int sigpause (int) __asm__ (__ASMNAME ("__xpg_sigpause")); 233 # else 234 int __xpg_sigpause (int); 235 # define sigpause __xpg_sigpause 236 # endif 237 #elif __BSD_VISIBLE 238 int sigpause (int); 239 #endif 240 241 #if __BSD_VISIBLE || __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 242 int sigaltstack (const stack_t *__restrict, stack_t *__restrict); 243 #endif 244 245 #if __POSIX_VISIBLE >= 199309 246 247 /* 3.3.8 Synchronously Accept a Signal, P1003.1b-1993, p. 76 248 NOTE: P1003.1c/D10, p. 39 adds sigwait(). */ 249 250 int sigwaitinfo (const sigset_t *, siginfo_t *); 251 int sigtimedwait (const sigset_t *, siginfo_t *, const struct timespec *); 252 /* 3.3.9 Queue a Signal to a Process, P1003.1b-1993, p. 78 */ 253 int sigqueue (pid_t, int, const union sigval); 254 255 #endif /* __POSIX_VISIBLE >= 199309 */ 256 257 /* Using __MISC_VISIBLE until POSIX Issue 8 is officially released */ 258 #if __MISC_VISIBLE 259 260 /* POSIX Issue 8 adds sig2str() and str2sig() */ 261 262 #if __SIZEOF_INT__ >= 4 263 #define SIG2STR_MAX (sizeof("RTMAX+") + sizeof("4294967295") - 1) 264 #else 265 #define SIG2STR_MAX (sizeof("RTMAX+") + sizeof("65535") - 1) 266 #endif 267 268 int sig2str(int, char *); 269 int str2sig(const char *__restrict, int *__restrict); 270 271 #endif /* __MISC_VISIBLE */ 272 273 #if defined(___AM29K__) 274 /* These all need to be defined for ANSI C, but I don't think they are 275 meaningful. */ 276 #define SIGABRT 1 277 #define SIGFPE 1 278 #define SIGILL 1 279 #define SIGINT 1 280 #define SIGSEGV 1 281 #define SIGTERM 1 282 /* These need to be defined for POSIX, and some others do too. */ 283 #define SIGHUP 1 284 #define SIGQUIT 1 285 #define NSIG 2 286 #elif defined(__GO32__) 287 #define SIGINT 1 288 #define SIGKILL 2 289 #define SIGPIPE 3 290 #define SIGFPE 4 291 #define SIGHUP 5 292 #define SIGTERM 6 293 #define SIGSEGV 7 294 #define SIGTSTP 8 295 #define SIGQUIT 9 296 #define SIGTRAP 10 297 #define SIGILL 11 298 #define SIGEMT 12 299 #define SIGALRM 13 300 #define SIGBUS 14 301 #define SIGLOST 15 302 #define SIGSTOP 16 303 #define SIGABRT 17 304 #define SIGUSR1 18 305 #define SIGUSR2 19 306 #define NSIG 20 307 #elif !defined(SIGTRAP) 308 #define SIGHUP 1 /* hangup */ 309 #define SIGINT 2 /* interrupt */ 310 #define SIGQUIT 3 /* quit */ 311 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 312 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 313 #define SIGIOT 6 /* IOT instruction */ 314 #define SIGABRT 6 /* used by abort, replace SIGIOT in the future */ 315 #define SIGEMT 7 /* EMT instruction */ 316 #define SIGFPE 8 /* floating point exception */ 317 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 318 #define SIGBUS 10 /* bus error */ 319 #define SIGSEGV 11 /* segmentation violation */ 320 #define SIGSYS 12 /* bad argument to system call */ 321 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 322 #define SIGALRM 14 /* alarm clock */ 323 #define SIGTERM 15 /* software termination signal from kill */ 324 325 #if defined(__rtems__) 326 #define SIGURG 16 /* urgent condition on IO channel */ 327 #define SIGSTOP 17 /* sendable stop signal not from tty */ 328 #define SIGTSTP 18 /* stop signal from tty */ 329 #define SIGCONT 19 /* continue a stopped process */ 330 #define SIGCHLD 20 /* to parent on child stop or exit */ 331 #define SIGCLD 20 /* System V name for SIGCHLD */ 332 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 333 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 334 #define SIGIO 23 /* input/output possible signal */ 335 #define SIGPOLL SIGIO /* System V name for SIGIO */ 336 #define SIGWINCH 24 /* window changed */ 337 #define SIGUSR1 25 /* user defined signal 1 */ 338 #define SIGUSR2 26 /* user defined signal 2 */ 339 340 /* Real-Time Signals Range, P1003.1b-1993, p. 61 341 NOTE: By P1003.1b-1993, this should be at least RTSIG_MAX 342 (which is a minimum of 8) signals. 343 */ 344 #define SIGRTMIN 27 345 #define SIGRTMAX 31 346 #define __SIGFIRSTNOTRT SIGHUP 347 #define __SIGLASTNOTRT SIGUSR2 348 349 #define NSIG 32 /* signal 0 implied */ 350 351 #elif defined(__svr4__) 352 /* svr4 specifics. different signals above 15, and sigaction. */ 353 #define SIGUSR1 16 354 #define SIGUSR2 17 355 #define SIGCLD 18 356 #define SIGPWR 19 357 #define SIGWINCH 20 358 #define SIGPOLL 22 /* 20 for x.out binaries!!!! */ 359 #define SIGSTOP 23 /* sendable stop signal not from tty */ 360 #define SIGTSTP 24 /* stop signal from tty */ 361 #define SIGCONT 25 /* continue a stopped process */ 362 #define SIGTTIN 26 /* to readers pgrp upon background tty read */ 363 #define SIGTTOU 27 /* like TTIN for output if (tp->t_local<OSTOP) */ 364 #define NSIG 28 365 #else 366 #define SIGURG 16 /* urgent condition on IO channel */ 367 #define SIGSTOP 17 /* sendable stop signal not from tty */ 368 #define SIGTSTP 18 /* stop signal from tty */ 369 #define SIGCONT 19 /* continue a stopped process */ 370 #define SIGCHLD 20 /* to parent on child stop or exit */ 371 #define SIGCLD 20 /* System V name for SIGCHLD */ 372 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 373 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 374 #define SIGIO 23 /* input/output possible signal */ 375 #define SIGPOLL SIGIO /* System V name for SIGIO */ 376 #define SIGXCPU 24 /* exceeded CPU time limit */ 377 #define SIGXFSZ 25 /* exceeded file size limit */ 378 #define SIGVTALRM 26 /* virtual time alarm */ 379 #define SIGPROF 27 /* profiling time alarm */ 380 #define SIGWINCH 28 /* window changed */ 381 #define SIGLOST 29 /* resource lost (eg, record-lock lost) */ 382 #define SIGUSR1 30 /* user defined signal 1 */ 383 #define SIGUSR2 31 /* user defined signal 2 */ 384 #define NSIG 32 /* signal 0 implied */ 385 #endif 386 #endif 387 388 #ifdef __cplusplus 389 } 390 #endif 391 392 #if defined(__CYGWIN__) 393 #if __XSI_VISIBLE >= 4 || __POSIX_VISIBLE >= 200809 394 #include <sys/ucontext.h> 395 #endif 396 #endif 397 398 #ifndef _SIGNAL_H_ 399 /* Some applications take advantage of the fact that <sys/signal.h> 400 * and <signal.h> are equivalent in glibc. Allow for that here. */ 401 #include <signal.h> 402 #endif 403 #endif /* _SYS_SIGNAL_H */ 404
