1 /* 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)signal.h 8.4 (Berkeley) 5/4/95 35 * $FreeBSD: src/sys/sys/signal.h,v 1.23.2.2 2001/04/19 01:38:35 alfred Exp $ 36 */ 37 38 #ifndef _SYS_SIGNAL_H_ 39 #define _SYS_SIGNAL_H_ 40 41 #include <sys/cdefs.h> 42 #include <machine/stdint.h> /* for __ types */ 43 44 /* 45 * sigset_t macros. 46 */ 47 #define _SIG_WORDS 4 48 #define _SIG_MAXSIG 128 49 #define _SIG_IDX(sig) ((sig) - 1) 50 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 51 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 52 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 53 54 /* 55 * System defined signals. 56 */ 57 #if __POSIX_VISIBLE 58 #define SIGHUP 1 /* hangup */ 59 #endif 60 #define SIGINT 2 /* interrupt */ 61 #if __POSIX_VISIBLE 62 #define SIGQUIT 3 /* quit */ 63 #endif 64 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 65 #if __XSI_VISIBLE 66 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 67 #endif 68 #define SIGABRT 6 /* abort() */ 69 #if __BSD_VISIBLE 70 #define SIGIOT SIGABRT /* compatibility */ 71 #define SIGEMT 7 /* EMT instruction */ 72 #endif 73 #define SIGFPE 8 /* floating point exception */ 74 #if __POSIX_VISIBLE 75 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 76 #endif 77 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 78 #define SIGBUS 10 /* bus error */ 79 #endif 80 #define SIGSEGV 11 /* segmentation violation */ 81 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 82 #define SIGSYS 12 /* non-existent system call invoked */ 83 #endif 84 #if __POSIX_VISIBLE 85 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 86 #define SIGALRM 14 /* alarm clock */ 87 #endif 88 #define SIGTERM 15 /* software termination signal from kill */ 89 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 90 #define SIGURG 16 /* urgent condition on IO channel */ 91 #endif 92 #if __POSIX_VISIBLE 93 #define SIGSTOP 17 /* sendable stop signal not from tty */ 94 #define SIGTSTP 18 /* stop signal from tty */ 95 #define SIGCONT 19 /* continue a stopped process */ 96 #define SIGCHLD 20 /* to parent on child stop or exit */ 97 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 98 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 99 #endif 100 #if __BSD_VISIBLE 101 #define SIGIO 23 /* input/output possible signal */ 102 #endif 103 #if __XSI_VISIBLE 104 #define SIGXCPU 24 /* exceeded CPU time limit */ 105 #define SIGXFSZ 25 /* exceeded file size limit */ 106 #define SIGVTALRM 26 /* virtual time alarm */ 107 #define SIGPROF 27 /* profiling time alarm */ 108 #endif 109 #if __BSD_VISIBLE 110 #define SIGWINCH 28 /* window size changes */ 111 #define SIGINFO 29 /* information request */ 112 #endif 113 #if __POSIX_VISIBLE 114 #define SIGUSR1 30 /* user defined signal 1 */ 115 #define SIGUSR2 31 /* user defined signal 2 */ 116 #endif 117 #if __BSD_VISIBLE 118 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 119 #define SIGCKPT 33 /* checkpoint and continue */ 120 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 121 #endif 122 123 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 124 /* 125 * si_code stuff 126 */ 127 /* SIGILL */ 128 #define ILL_ILLOPC 1 /* Illegal opcode */ 129 #define ILL_ILLOPN 2 /* Illegal operand */ 130 #define ILL_ILLADR 3 /* Illegal addressing mode */ 131 #define ILL_ILLTRP 4 /* Illegal trap */ 132 #define ILL_PRVOPC 5 /* Privileged opcode */ 133 #define ILL_PRVREG 6 /* Privileged register */ 134 #define ILL_COPROC 7 /* Coprocessor error */ 135 #define ILL_BADSTK 8 /* Internal stack error */ 136 137 /* SIGFPE */ 138 #define FPE_INTOVF 1 /* Integer overflow */ 139 #define FPE_INTDIV 2 /* Integer divide by zero */ 140 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 141 #define FPE_FLTOVF 4 /* Floating point overflow */ 142 #define FPE_FLTUND 5 /* Floating point underflow */ 143 #define FPE_FLTRES 6 /* Floating point inexact result */ 144 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 145 #define FPE_FLTSUB 8 /* Subscript out of range */ 146 147 /* SIGSEGV */ 148 #define SEGV_MAPERR 1 /* Address not mapped to object */ 149 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 150 151 /* SIGBUS */ 152 #define BUS_ADRALN 1 /* Invalid address alignment */ 153 #define BUS_ADRERR 2 /* Non-existent physical address */ 154 #define BUS_OBJERR 3 /* Object specific hardware error */ 155 156 /* SIGTRAP */ 157 #define TRAP_BRKPT 1 /* Process breakpoint */ 158 #define TRAP_TRACE 2 /* Process trace trap */ 159 160 /* SIGCHLD */ 161 #define CLD_EXITED 1 /* Child has exited */ 162 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 163 /* did not create a core file */ 164 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 165 /* created a core file */ 166 #define CLD_TRAPPED 4 /* Traced child has trapped */ 167 #define CLD_STOPPED 5 /* Child has stopped */ 168 #define CLD_CONTINUED 6 /* Stopped child has continued */ 169 170 /* SIGPOLL */ 171 #define POLL_IN 1 /* Data input available */ 172 #define POLL_OUT 2 /* Output buffers available */ 173 #define POLL_MSG 3 /* Input message available */ 174 #define POLL_ERR 4 /* I/O Error */ 175 #define POLL_PRI 5 /* High priority input available */ 176 #define POLL_HUP 6 /* Device disconnected */ 177 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 178 179 180 #if __POSIX_VISIBLE 181 /** si_code */ 182 #define SI_USER 0 /* Sent by kill(2) */ 183 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 184 #define SI_TIMER -2 /* Generated by expiration of a timer */ 185 /* set by timer_settime(2) */ 186 #define SI_ASYNCIO -3 /* Generated by completion of an */ 187 /* asynchronous I/O signal */ 188 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 189 /* an empty message queue */ 190 #endif 191 192 /*- 193 * Type of a signal handling function. 194 * 195 * Language spec sez signal handlers take exactly one arg, even though we 196 * actually supply three. Ugh! 197 * 198 * We don't try to hide the difference by leaving out the args because 199 * that would cause warnings about conformant programs. Nonconformant 200 * programs can avoid the warnings by casting to (__sighandler_t *) or 201 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 202 * 203 * The kernel should reverse the cast before calling the function. It 204 * has no way to do this, but on most machines 1-arg and 3-arg functions 205 * have the same calling protocol so there is no problem in practice. 206 * A bit in sa_flags could be used to specify the number of args. 207 * 208 * SIG_EINTR causes system calls to interrupt but generates no signal 209 * delivery. The caller is responsible for polling the event. 210 */ 211 typedef void __sighandler_t (int); 212 213 #define SIG_DFL ((__sighandler_t *)0) 214 #define SIG_IGN ((__sighandler_t *)1) 215 #define SIG_ERR ((__sighandler_t *)-1) 216 217 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 218 union sigval { 219 /* Members as suggested by SuSv2 and IEEE Std 1003.1 */ 220 int sival_int; 221 void *sival_ptr; 222 /* Leave old members for backward compatibility */ 223 int sigval_int; 224 void *sigval_ptr; 225 226 }; 227 #endif 228 229 #if __POSIX_VISIBLE >= 199309 230 struct sigevent { 231 int sigev_notify; /* Notification type */ 232 union { 233 int __sigev_signo; /* Signal number */ 234 int __sigev_notify_kqueue; 235 void *__sigev_notify_attributes; 236 } __sigev_u; 237 union sigval sigev_value; /* Signal value */ 238 void (*sigev_notify_function)(union sigval); 239 }; 240 #define sigev_signo __sigev_u.__sigev_signo 241 #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes 242 #if __BSD_VISIBLE 243 #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue 244 #endif 245 246 #define SIGEV_NONE 0 /* No async notification */ 247 #define SIGEV_SIGNAL 1 /* Generate a queued signal */ 248 #define SIGEV_THREAD 2 /* Call back in a pthread */ 249 #if __BSD_VISIBLE 250 #define SIGEV_KEVENT 3 /* Generate a kevent */ 251 #endif 252 #endif /* __POSIX_VISIBLE >= 199309 */ 253 254 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 255 typedef struct __siginfo { 256 int si_signo; /* signal number */ 257 int si_errno; /* errno association */ 258 /* 259 * Cause of signal, one of the SI_ macros or signal-specific 260 * values, i.e. one of the FPE_... values for SIGFPE. This 261 * value is equivalent to the second argument to an old-style 262 * FreeBSD signal handler. 263 */ 264 int si_code; /* signal code */ 265 int si_pid; /* sending process */ 266 unsigned int si_uid; /* sender's ruid */ 267 int si_status; /* exit value */ 268 void *si_addr; /* faulting instruction */ 269 union sigval si_value; /* signal value */ 270 long si_band; /* band event for SIGPOLL */ 271 int __spare__[7]; /* gimme some slack */ 272 } siginfo_t; 273 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 274 275 /* #if __POSIX_VISIBLE */ 276 typedef struct __sigset { 277 unsigned int __bits[_SIG_WORDS]; 278 } sigset_t; 279 /* #endif */ 280 281 /* 282 * XXX - there are some nasty dependencies on include file order. Now that 283 * sigset_t has been defined we can include the MD header. 284 */ 285 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 286 287 #if __POSIX_VISIBLE 288 struct __siginfo; 289 290 /* 291 * Signal vector "template" used in sigaction call. 292 */ 293 struct sigaction { 294 union { 295 void (*__sa_handler) (int); 296 void (*__sa_sigaction) (int, struct __siginfo *, void *); 297 } __sigaction_u; /* signal handler */ 298 int sa_flags; /* see signal options below */ 299 sigset_t sa_mask; /* signal mask to apply */ 300 }; 301 302 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 303 #define sa_handler __sigaction_u.__sa_handler 304 305 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 306 #endif /* __POSIX_VISIBLE */ 307 308 #if __XSI_VISIBLE 309 #define sa_sigaction __sigaction_u.__sa_sigaction 310 #endif 311 312 #if __XSI_VISIBLE 313 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 314 #define SA_RESTART 0x0002 /* restart system call on signal return */ 315 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 316 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 317 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 318 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 319 #endif 320 321 #if __BSD_VISIBLE 322 #define NSIG 64 /* size of sigptbl */ 323 324 /* Additional FreeBSD values. */ 325 #define SI_UNDEFINED 0 326 327 typedef void __siginfohandler_t (int, struct __siginfo *, void *); 328 329 #endif 330 331 /* XXX this should really be under __BSD_VISIBLE */ 332 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 333 334 /* #if __XSI_VISIBLE */ 335 /* 336 * Structure used in sigaltstack call. 337 */ 338 #if __BSD_VISIBLE 339 typedef struct sigaltstack { 340 #else 341 typedef struct { 342 #endif 343 char *ss_sp; /* signal stack base */ 344 __size_t ss_size; /* signal stack length */ 345 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 346 } stack_t; 347 348 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 349 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 350 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 351 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 352 /* #endif */ 353 354 /* Have enough typedefs for this now. XXX */ 355 #include <sys/ucontext.h> 356 357 #if __BSD_VISIBLE 358 /* 359 * 4.3 compatibility: 360 * Signal vector "template" used in sigvec call. 361 */ 362 struct sigvec { 363 __sighandler_t *sv_handler; /* signal handler */ 364 int sv_mask; /* signal mask to apply */ 365 int sv_flags; /* see signal options below */ 366 }; 367 368 #define SV_ONSTACK SA_ONSTACK 369 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 370 #define SV_RESETHAND SA_RESETHAND 371 #define SV_NODEFER SA_NODEFER 372 #define SV_NOCLDSTOP SA_NOCLDSTOP 373 #define SV_SIGINFO SA_SIGINFO 374 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 375 #endif 376 377 #if __XSI_VISIBLE 378 /* 379 * Structure used in sigstack call. 380 */ 381 struct sigstack { 382 char *ss_sp; /* signal stack pointer */ 383 int ss_onstack; /* current status */ 384 }; 385 #endif 386 387 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 388 /* 389 * Macro for converting signal number to a mask suitable for 390 * sigblock(). 391 */ 392 #define sigmask(m) (1 << ((m)-1)) 393 #endif 394 395 #if __BSD_VISIBLE 396 #define BADSIG SIG_ERR 397 #endif 398 399 #if __POSIX_VISIBLE 400 /* 401 * Flags for sigprocmask: 402 */ 403 #define SIG_BLOCK 1 /* block specified signal set */ 404 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 405 #define SIG_SETMASK 3 /* set specified signal set */ 406 #endif 407 408 /* 409 * For historical reasons; programs expect signal's return value to be 410 * defined by <sys/signal.h>. 411 */ 412 __BEGIN_DECLS 413 __sighandler_t *signal (int, __sighandler_t *); 414 __END_DECLS 415 416 #endif /* !_SYS_SIGNAL_H_ */ 417