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 <sys/_pthreadtypes.h> 43 #include <sys/_sigset.h> 44 #include <sys/stdint.h> /* for __ types */ 45 46 #ifndef _PID_T_DECLARED 47 typedef __pid_t pid_t; 48 #define _PID_T_DECLARED 49 #endif 50 51 #ifndef _SIZE_T_DECLARED 52 typedef __size_t size_t; 53 #define _SIZE_T_DECLARED 54 #endif 55 56 #ifndef _UID_T_DECLARED 57 typedef __uint32_t uid_t; 58 #define _UID_T_DECLARED 59 #endif 60 61 /* 62 * sigset_t macros. 63 */ 64 #define _SIG_MAXSIG 128 65 #define _SIG_IDX(sig) ((sig) - 1) 66 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 67 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 68 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 69 70 /* 71 * System defined signals. 72 */ 73 #if __POSIX_VISIBLE 74 #define SIGHUP 1 /* hangup */ 75 #endif 76 #define SIGINT 2 /* interrupt */ 77 #if __POSIX_VISIBLE 78 #define SIGQUIT 3 /* quit */ 79 #endif 80 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 81 #if __XSI_VISIBLE 82 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 83 #endif 84 #define SIGABRT 6 /* abort() */ 85 #if __BSD_VISIBLE 86 #define SIGIOT SIGABRT /* compatibility */ 87 #define SIGEMT 7 /* EMT instruction */ 88 #endif 89 #define SIGFPE 8 /* floating point exception */ 90 #if __POSIX_VISIBLE 91 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 92 #endif 93 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 94 #define SIGBUS 10 /* bus error */ 95 #endif 96 #define SIGSEGV 11 /* segmentation violation */ 97 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 98 #define SIGSYS 12 /* non-existent system call invoked */ 99 #endif 100 #if __POSIX_VISIBLE 101 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 102 #define SIGALRM 14 /* alarm clock */ 103 #endif 104 #define SIGTERM 15 /* software termination signal from kill */ 105 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 106 #define SIGURG 16 /* urgent condition on IO channel */ 107 #endif 108 #if __POSIX_VISIBLE 109 #define SIGSTOP 17 /* sendable stop signal not from tty */ 110 #define SIGTSTP 18 /* stop signal from tty */ 111 #define SIGCONT 19 /* continue a stopped process */ 112 #define SIGCHLD 20 /* to parent on child stop or exit */ 113 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 114 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 115 #endif 116 #if __BSD_VISIBLE 117 #define SIGIO 23 /* input/output possible signal */ 118 #endif 119 #if __XSI_VISIBLE 120 #define SIGXCPU 24 /* exceeded CPU time limit */ 121 #define SIGXFSZ 25 /* exceeded file size limit */ 122 #define SIGVTALRM 26 /* virtual time alarm */ 123 #define SIGPROF 27 /* profiling time alarm */ 124 #endif 125 #if __BSD_VISIBLE 126 #define SIGWINCH 28 /* window size changes */ 127 #define SIGINFO 29 /* information request */ 128 #endif 129 #if __POSIX_VISIBLE 130 #define SIGUSR1 30 /* user defined signal 1 */ 131 #define SIGUSR2 31 /* user defined signal 2 */ 132 #endif 133 #if __BSD_VISIBLE 134 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 135 #define SIGCKPT 33 /* checkpoint and continue */ 136 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 137 #endif 138 139 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 140 /* 141 * si_code stuff 142 */ 143 /* SIGILL */ 144 #define ILL_ILLOPC 1 /* Illegal opcode */ 145 #define ILL_ILLOPN 2 /* Illegal operand */ 146 #define ILL_ILLADR 3 /* Illegal addressing mode */ 147 #define ILL_ILLTRP 4 /* Illegal trap */ 148 #define ILL_PRVOPC 5 /* Privileged opcode */ 149 #define ILL_PRVREG 6 /* Privileged register */ 150 #define ILL_COPROC 7 /* Coprocessor error */ 151 #define ILL_BADSTK 8 /* Internal stack error */ 152 153 /* SIGFPE */ 154 #define FPE_INTOVF 1 /* Integer overflow */ 155 #define FPE_INTDIV 2 /* Integer divide by zero */ 156 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 157 #define FPE_FLTOVF 4 /* Floating point overflow */ 158 #define FPE_FLTUND 5 /* Floating point underflow */ 159 #define FPE_FLTRES 6 /* Floating point inexact result */ 160 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 161 #define FPE_FLTSUB 8 /* Subscript out of range */ 162 163 /* SIGSEGV */ 164 #define SEGV_MAPERR 1 /* Address not mapped to object */ 165 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 166 167 /* SIGBUS */ 168 #define BUS_ADRALN 1 /* Invalid address alignment */ 169 #define BUS_ADRERR 2 /* Non-existent physical address */ 170 #define BUS_OBJERR 3 /* Object specific hardware error */ 171 172 /* SIGTRAP */ 173 #define TRAP_BRKPT 1 /* Process breakpoint */ 174 #define TRAP_TRACE 2 /* Process trace trap */ 175 176 /* SIGCHLD */ 177 #define CLD_EXITED 1 /* Child has exited */ 178 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 179 /* did not create a core file */ 180 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 181 /* created a core file */ 182 #define CLD_TRAPPED 4 /* Traced child has trapped */ 183 #define CLD_STOPPED 5 /* Child has stopped */ 184 #define CLD_CONTINUED 6 /* Stopped child has continued */ 185 186 /* SIGPOLL */ 187 #define POLL_IN 1 /* Data input available */ 188 #define POLL_OUT 2 /* Output buffers available */ 189 #define POLL_MSG 3 /* Input message available */ 190 #define POLL_ERR 4 /* I/O Error */ 191 #define POLL_PRI 5 /* High priority input available */ 192 #define POLL_HUP 6 /* Device disconnected */ 193 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 194 195 196 #if __POSIX_VISIBLE 197 /** si_code */ 198 #define SI_USER 0 /* Sent by kill(2) */ 199 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 200 #define SI_TIMER -2 /* Generated by expiration of a timer */ 201 /* set by timer_settime(2) */ 202 #define SI_ASYNCIO -3 /* Generated by completion of an */ 203 /* asynchronous I/O signal */ 204 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 205 /* an empty message queue */ 206 #endif 207 208 /*- 209 * Type of a signal handling function. 210 * 211 * Language spec sez signal handlers take exactly one arg, even though we 212 * actually supply three. Ugh! 213 * 214 * We don't try to hide the difference by leaving out the args because 215 * that would cause warnings about conformant programs. Nonconformant 216 * programs can avoid the warnings by casting to (__sighandler_t *) or 217 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 218 * 219 * The kernel should reverse the cast before calling the function. It 220 * has no way to do this, but on most machines 1-arg and 3-arg functions 221 * have the same calling protocol so there is no problem in practice. 222 * A bit in sa_flags could be used to specify the number of args. 223 * 224 * SIG_EINTR causes system calls to interrupt but generates no signal 225 * delivery. The caller is responsible for polling the event. 226 */ 227 typedef void __sighandler_t (int); 228 229 #define SIG_DFL ((__sighandler_t *)0) 230 #define SIG_IGN ((__sighandler_t *)1) 231 #define SIG_ERR ((__sighandler_t *)-1) 232 233 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 234 union sigval { 235 int sival_int; 236 void *sival_ptr; 237 }; 238 #endif 239 240 #if __POSIX_VISIBLE >= 199309 241 struct sigevent { 242 int sigev_notify; /* Notification type */ 243 union { 244 int __sigev_signo; /* Signal number */ 245 int __sigev_notify_kqueue; 246 pthread_attr_t *__sigev_notify_attributes; 247 } __sigev_u; 248 union sigval sigev_value; /* Signal value */ 249 void (*sigev_notify_function)(union sigval); 250 }; 251 #define sigev_signo __sigev_u.__sigev_signo 252 #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes 253 #if __BSD_VISIBLE 254 #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue 255 #endif 256 257 #define SIGEV_NONE 0 /* No async notification */ 258 #define SIGEV_SIGNAL 1 /* Generate a queued signal */ 259 #define SIGEV_THREAD 2 /* Call back in a pthread */ 260 #if __BSD_VISIBLE 261 #define SIGEV_KEVENT 3 /* Generate a kevent */ 262 #endif 263 #endif /* __POSIX_VISIBLE >= 199309 */ 264 265 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 266 typedef struct __siginfo { 267 int si_signo; /* signal number */ 268 int si_errno; /* errno association */ 269 /* 270 * Cause of signal, one of the SI_ macros or signal-specific 271 * values, i.e. one of the FPE_... values for SIGFPE. This 272 * value is equivalent to the second argument to an old-style 273 * FreeBSD signal handler. 274 */ 275 int si_code; /* signal code */ 276 pid_t si_pid; /* sending process */ 277 uid_t si_uid; /* sender's ruid */ 278 int si_status; /* exit value */ 279 void *si_addr; /* faulting instruction */ 280 union sigval si_value; /* signal value */ 281 long si_band; /* band event for SIGPOLL */ 282 int __spare__[7]; /* gimme some slack */ 283 } siginfo_t; 284 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 285 286 #ifndef _SIGSET_T_DECLARED 287 typedef struct __sigset sigset_t; 288 #define _SIGSET_T_DECLARED 289 #endif 290 291 /* 292 * XXX - there are some nasty dependencies on include file order. Now that 293 * sigset_t has been defined we can include the MD header. 294 */ 295 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 296 297 #if __POSIX_VISIBLE 298 struct __siginfo; 299 300 /* 301 * Signal vector "template" used in sigaction call. 302 */ 303 struct sigaction { 304 union { 305 void (*__sa_handler) (int); 306 void (*__sa_sigaction) (int, struct __siginfo *, void *); 307 } __sigaction_u; /* signal handler */ 308 int sa_flags; /* see signal options below */ 309 sigset_t sa_mask; /* signal mask to apply */ 310 }; 311 312 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 313 #define sa_handler __sigaction_u.__sa_handler 314 315 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 316 #endif /* __POSIX_VISIBLE */ 317 318 #if __XSI_VISIBLE 319 #define sa_sigaction __sigaction_u.__sa_sigaction 320 #endif 321 322 #if __XSI_VISIBLE 323 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 324 #define SA_RESTART 0x0002 /* restart system call on signal return */ 325 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 326 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 327 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 328 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 329 #endif 330 331 #if __BSD_VISIBLE 332 #define NSIG 64 /* size of sigptbl */ 333 334 /* Additional FreeBSD values. */ 335 #define SI_UNDEFINED 0 336 337 typedef void __siginfohandler_t (int, siginfo_t *, void *); 338 339 #endif 340 341 /* XXX this should really be under __BSD_VISIBLE */ 342 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 343 344 /* #if __XSI_VISIBLE */ 345 /* 346 * Structure used in sigaltstack call. 347 */ 348 #if __BSD_VISIBLE 349 typedef struct sigaltstack { 350 #else 351 typedef struct { 352 #endif 353 void *ss_sp; /* signal stack base */ 354 size_t ss_size; /* signal stack length */ 355 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 356 } stack_t; 357 358 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 359 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 360 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 361 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 362 /* #endif */ 363 364 /* Have enough typedefs for this now. XXX */ 365 #include <sys/ucontext.h> 366 367 #if __BSD_VISIBLE 368 /* 369 * 4.3 compatibility: 370 * Signal vector "template" used in sigvec call. 371 */ 372 struct sigvec { 373 __sighandler_t *sv_handler; /* signal handler */ 374 int sv_mask; /* signal mask to apply */ 375 int sv_flags; /* see signal options below */ 376 }; 377 378 #define SV_ONSTACK SA_ONSTACK 379 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 380 #define SV_RESETHAND SA_RESETHAND 381 #define SV_NODEFER SA_NODEFER 382 #define SV_NOCLDSTOP SA_NOCLDSTOP 383 #define SV_SIGINFO SA_SIGINFO 384 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 385 #endif 386 387 #if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE < 200809) 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