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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)signal.h 8.4 (Berkeley) 5/4/95 39 * $FreeBSD: src/sys/sys/signal.h,v 1.23.2.2 2001/04/19 01:38:35 alfred Exp $ 40 */ 41 42 #ifndef _SYS_SIGNAL_H_ 43 #define _SYS_SIGNAL_H_ 44 45 #include <sys/cdefs.h> 46 #include <machine/stdint.h> /* for __ types */ 47 48 /* 49 * sigset_t macros. 50 */ 51 #define _SIG_WORDS 4 52 #define _SIG_MAXSIG 128 53 #define _SIG_IDX(sig) ((sig) - 1) 54 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 55 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 56 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 57 58 /* 59 * System defined signals. 60 */ 61 #if __POSIX_VISIBLE || __XSI_VISIBLE 62 #define SIGHUP 1 /* hangup */ 63 #endif 64 #define SIGINT 2 /* interrupt */ 65 #if __POSIX_VISIBLE || __XSI_VISIBLE 66 #define SIGQUIT 3 /* quit */ 67 #endif 68 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 69 #if __XSI_VISIBLE 70 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 71 #endif 72 #define SIGABRT 6 /* abort() */ 73 #if __BSD_VISIBLE 74 #define SIGIOT SIGABRT /* compatibility */ 75 #define SIGEMT 7 /* EMT instruction */ 76 #endif 77 #define SIGFPE 8 /* floating point exception */ 78 #if __POSIX_VISIBLE || __XSI_VISIBLE 79 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 80 #endif 81 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 82 #define SIGBUS 10 /* bus error */ 83 #endif 84 #define SIGSEGV 11 /* segmentation violation */ 85 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 86 #define SIGSYS 12 /* non-existent system call invoked */ 87 #endif 88 #if __POSIX_VISIBLE || __XSI_VISIBLE 89 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 90 #define SIGALRM 14 /* alarm clock */ 91 #endif 92 #define SIGTERM 15 /* software termination signal from kill */ 93 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 94 #define SIGURG 16 /* urgent condition on IO channel */ 95 #endif 96 #if __POSIX_VISIBLE || __XSI_VISIBLE 97 #define SIGSTOP 17 /* sendable stop signal not from tty */ 98 #define SIGTSTP 18 /* stop signal from tty */ 99 #define SIGCONT 19 /* continue a stopped process */ 100 #define SIGCHLD 20 /* to parent on child stop or exit */ 101 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 102 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 103 #endif 104 #if __BSD_VISIBLE 105 #define SIGIO 23 /* input/output possible signal */ 106 #endif 107 #if __XSI_VISIBLE 108 #define SIGXCPU 24 /* exceeded CPU time limit */ 109 #define SIGXFSZ 25 /* exceeded file size limit */ 110 #define SIGVTALRM 26 /* virtual time alarm */ 111 #define SIGPROF 27 /* profiling time alarm */ 112 #endif 113 #if __BSD_VISIBLE 114 #define SIGWINCH 28 /* window size changes */ 115 #define SIGINFO 29 /* information request */ 116 #endif 117 #if __POSIX_VISIBLE || __XSI_VISIBLE 118 #define SIGUSR1 30 /* user defined signal 1 */ 119 #define SIGUSR2 31 /* user defined signal 2 */ 120 #endif 121 #if __BSD_VISIBLE 122 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 123 #define SIGCKPT 33 /* checkpoint and continue */ 124 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 125 #endif 126 127 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 128 /* 129 * si_code stuff 130 */ 131 /* SIGILL */ 132 #define ILL_ILLOPC 1 /* Illegal opcode */ 133 #define ILL_ILLOPN 2 /* Illegal operand */ 134 #define ILL_ILLADR 3 /* Illegal addressing mode */ 135 #define ILL_ILLTRP 4 /* Illegal trap */ 136 #define ILL_PRVOPC 5 /* Privileged opcode */ 137 #define ILL_PRVREG 6 /* Privileged register */ 138 #define ILL_COPROC 7 /* Coprocessor error */ 139 #define ILL_BADSTK 8 /* Internal stack error */ 140 141 /* SIGFPE */ 142 #define FPE_INTOVF 1 /* Integer overflow */ 143 #define FPE_INTDIV 2 /* Integer divide by zero */ 144 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 145 #define FPE_FLTOVF 4 /* Floating point overflow */ 146 #define FPE_FLTUND 5 /* Floating point underflow */ 147 #define FPE_FLTRES 6 /* Floating point inexact result */ 148 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 149 #define FPE_FLTSUB 8 /* Subscript out of range */ 150 151 /* SIGSEGV */ 152 #define SEGV_MAPERR 1 /* Address not mapped to object */ 153 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 154 155 /* SIGBUS */ 156 #define BUS_ADRALN 1 /* Invalid address alignment */ 157 #define BUS_ADRERR 2 /* Non-existent physical address */ 158 #define BUS_OBJERR 3 /* Object specific hardware error */ 159 160 /* SIGTRAP */ 161 #define TRAP_BRKPT 1 /* Process breakpoint */ 162 #define TRAP_TRACE 2 /* Process trace trap */ 163 164 /* SIGCHLD */ 165 #define CLD_EXITED 1 /* Child has exited */ 166 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 167 /* did not create a core file */ 168 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 169 /* created a core file */ 170 #define CLD_TRAPPED 4 /* Traced child has trapped */ 171 #define CLD_STOPPED 5 /* Child has stopped */ 172 #define CLD_CONTINUED 6 /* Stopped child has continued */ 173 174 /* SIGPOLL */ 175 #define POLL_IN 1 /* Data input available */ 176 #define POLL_OUT 2 /* Output buffers available */ 177 #define POLL_MSG 3 /* Input message available */ 178 #define POLL_ERR 4 /* I/O Error */ 179 #define POLL_PRI 5 /* High priority input available */ 180 #define POLL_HUP 6 /* Device disconnected */ 181 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 182 183 184 #if __POSIX_VISIBLE || __XSI_VISIBLE 185 /** si_code */ 186 #define SI_USER 0 /* Sent by kill(2) */ 187 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 188 #define SI_TIMER -2 /* Generated by expiration of a timer */ 189 /* set by timer_settime(2) */ 190 #define SI_ASYNCIO -3 /* Generated by completion of an */ 191 /* asynchronous I/O signal */ 192 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 193 /* an empty message queue */ 194 #endif 195 196 /*- 197 * Type of a signal handling function. 198 * 199 * Language spec sez signal handlers take exactly one arg, even though we 200 * actually supply three. Ugh! 201 * 202 * We don't try to hide the difference by leaving out the args because 203 * that would cause warnings about conformant programs. Nonconformant 204 * programs can avoid the warnings by casting to (__sighandler_t *) or 205 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 206 * 207 * The kernel should reverse the cast before calling the function. It 208 * has no way to do this, but on most machines 1-arg and 3-arg functions 209 * have the same calling protocol so there is no problem in practice. 210 * A bit in sa_flags could be used to specify the number of args. 211 * 212 * SIG_EINTR causes system calls to interrupt but generates no signal 213 * delivery. The caller is responsible for polling the event. 214 */ 215 typedef void __sighandler_t (int); 216 217 #define SIG_DFL ((__sighandler_t *)0) 218 #define SIG_IGN ((__sighandler_t *)1) 219 #define SIG_ERR ((__sighandler_t *)-1) 220 221 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 222 union sigval { 223 /* Members as suggested by SuSv2 and IEEE Std 1003.1 */ 224 int sival_int; 225 void *sival_ptr; 226 /* Leave old members for backward compatibility */ 227 int sigval_int; 228 void *sigval_ptr; 229 230 }; 231 #endif 232 233 #if __POSIX_VISIBLE >= 199309 234 struct sigevent { 235 int sigev_notify; /* Notification type */ 236 union { 237 int __sigev_signo; /* Signal number */ 238 int __sigev_notify_kqueue; 239 void *__sigev_notify_attributes; 240 } __sigev_u; 241 union sigval sigev_value; /* Signal value */ 242 void (*sigev_notify_function)(union sigval); 243 }; 244 #define sigev_signo __sigev_u.__sigev_signo 245 #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes 246 #if __BSD_VISIBLE 247 #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue 248 #endif 249 250 #define SIGEV_NONE 0 /* No async notification */ 251 #define SIGEV_SIGNAL 1 /* Generate a queued signal */ 252 #define SIGEV_THREAD 2 /* Call back in a pthread */ 253 #if __BSD_VISIBLE 254 #define SIGEV_KEVENT 3 /* Generate a kevent */ 255 #endif 256 #endif /* __POSIX_VISIBLE >= 199309 */ 257 258 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 259 typedef struct __siginfo { 260 int si_signo; /* signal number */ 261 int si_errno; /* errno association */ 262 /* 263 * Cause of signal, one of the SI_ macros or signal-specific 264 * values, i.e. one of the FPE_... values for SIGFPE. This 265 * value is equivalent to the second argument to an old-style 266 * FreeBSD signal handler. 267 */ 268 int si_code; /* signal code */ 269 int si_pid; /* sending process */ 270 unsigned int si_uid; /* sender's ruid */ 271 int si_status; /* exit value */ 272 void *si_addr; /* faulting instruction */ 273 union sigval si_value; /* signal value */ 274 long si_band; /* band event for SIGPOLL */ 275 int __spare__[7]; /* gimme some slack */ 276 } siginfo_t; 277 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 278 279 /* #if __POSIX_VISIBLE || __XSI_VISIBLE */ 280 typedef struct __sigset { 281 unsigned int __bits[_SIG_WORDS]; 282 } sigset_t; 283 /* #endif */ 284 285 /* 286 * XXX - there are some nasty dependencies on include file order. Now that 287 * sigset_t has been defined we can include the MD header. 288 */ 289 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 290 291 #if __POSIX_VISIBLE || __XSI_VISIBLE 292 struct __siginfo; 293 294 /* 295 * Signal vector "template" used in sigaction call. 296 */ 297 struct sigaction { 298 union { 299 void (*__sa_handler) (int); 300 void (*__sa_sigaction) (int, struct __siginfo *, void *); 301 } __sigaction_u; /* signal handler */ 302 int sa_flags; /* see signal options below */ 303 sigset_t sa_mask; /* signal mask to apply */ 304 }; 305 306 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 307 #define sa_handler __sigaction_u.__sa_handler 308 309 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 310 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 311 312 #if __XSI_VISIBLE 313 #define sa_sigaction __sigaction_u.__sa_sigaction 314 #endif 315 316 #if __XSI_VISIBLE 317 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 318 #define SA_RESTART 0x0002 /* restart system call on signal return */ 319 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 320 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 321 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 322 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 323 #endif 324 325 #if __BSD_VISIBLE 326 #define NSIG 64 /* size of sigptbl */ 327 328 /* Additional FreeBSD values. */ 329 #define SI_UNDEFINED 0 330 331 typedef void __siginfohandler_t (int, struct __siginfo *, void *); 332 333 #endif 334 335 /* XXX this should really be under __BSD_VISIBLE */ 336 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 337 338 /* #if __XSI_VISIBLE */ 339 /* 340 * Structure used in sigaltstack call. 341 */ 342 #if __BSD_VISIBLE 343 typedef struct sigaltstack { 344 #else 345 typedef struct { 346 #endif 347 char *ss_sp; /* signal stack base */ 348 __size_t ss_size; /* signal stack length */ 349 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 350 } stack_t; 351 352 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 353 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 354 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 355 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 356 /* #endif */ 357 358 /* Have enough typedefs for this now. XXX */ 359 #include <sys/ucontext.h> 360 361 #if __BSD_VISIBLE 362 /* 363 * 4.3 compatibility: 364 * Signal vector "template" used in sigvec call. 365 */ 366 struct sigvec { 367 __sighandler_t *sv_handler; /* signal handler */ 368 int sv_mask; /* signal mask to apply */ 369 int sv_flags; /* see signal options below */ 370 }; 371 372 #define SV_ONSTACK SA_ONSTACK 373 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 374 #define SV_RESETHAND SA_RESETHAND 375 #define SV_NODEFER SA_NODEFER 376 #define SV_NOCLDSTOP SA_NOCLDSTOP 377 #define SV_SIGINFO SA_SIGINFO 378 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 379 #endif 380 381 #if __XSI_VISIBLE 382 /* 383 * Structure used in sigstack call. 384 */ 385 struct sigstack { 386 char *ss_sp; /* signal stack pointer */ 387 int ss_onstack; /* current status */ 388 }; 389 #endif 390 391 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 392 /* 393 * Macro for converting signal number to a mask suitable for 394 * sigblock(). 395 */ 396 #define sigmask(m) (1 << ((m)-1)) 397 #endif 398 399 #if __BSD_VISIBLE 400 #define BADSIG SIG_ERR 401 #endif 402 403 #if __POSIX_VISIBLE || __XSI_VISIBLE 404 /* 405 * Flags for sigprocmask: 406 */ 407 #define SIG_BLOCK 1 /* block specified signal set */ 408 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 409 #define SIG_SETMASK 3 /* set specified signal set */ 410 #endif 411 412 /* 413 * For historical reasons; programs expect signal's return value to be 414 * defined by <sys/signal.h>. 415 */ 416 __BEGIN_DECLS 417 __sighandler_t *signal (int, __sighandler_t *); 418 __END_DECLS 419 420 #endif /* !_SYS_SIGNAL_H_ */ 421