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 <machine/stdint.h> /* for __ types */ 44 45 /* 46 * sigset_t macros. 47 */ 48 #define _SIG_WORDS 4 49 #define _SIG_MAXSIG 128 50 #define _SIG_IDX(sig) ((sig) - 1) 51 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 52 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 53 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 54 55 /* 56 * System defined signals. 57 */ 58 #if __POSIX_VISIBLE 59 #define SIGHUP 1 /* hangup */ 60 #endif 61 #define SIGINT 2 /* interrupt */ 62 #if __POSIX_VISIBLE 63 #define SIGQUIT 3 /* quit */ 64 #endif 65 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 66 #if __XSI_VISIBLE 67 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 68 #endif 69 #define SIGABRT 6 /* abort() */ 70 #if __BSD_VISIBLE 71 #define SIGIOT SIGABRT /* compatibility */ 72 #define SIGEMT 7 /* EMT instruction */ 73 #endif 74 #define SIGFPE 8 /* floating point exception */ 75 #if __POSIX_VISIBLE 76 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 77 #endif 78 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 79 #define SIGBUS 10 /* bus error */ 80 #endif 81 #define SIGSEGV 11 /* segmentation violation */ 82 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 83 #define SIGSYS 12 /* non-existent system call invoked */ 84 #endif 85 #if __POSIX_VISIBLE 86 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 87 #define SIGALRM 14 /* alarm clock */ 88 #endif 89 #define SIGTERM 15 /* software termination signal from kill */ 90 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 91 #define SIGURG 16 /* urgent condition on IO channel */ 92 #endif 93 #if __POSIX_VISIBLE 94 #define SIGSTOP 17 /* sendable stop signal not from tty */ 95 #define SIGTSTP 18 /* stop signal from tty */ 96 #define SIGCONT 19 /* continue a stopped process */ 97 #define SIGCHLD 20 /* to parent on child stop or exit */ 98 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 99 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 100 #endif 101 #if __BSD_VISIBLE 102 #define SIGIO 23 /* input/output possible signal */ 103 #endif 104 #if __XSI_VISIBLE 105 #define SIGXCPU 24 /* exceeded CPU time limit */ 106 #define SIGXFSZ 25 /* exceeded file size limit */ 107 #define SIGVTALRM 26 /* virtual time alarm */ 108 #define SIGPROF 27 /* profiling time alarm */ 109 #endif 110 #if __BSD_VISIBLE 111 #define SIGWINCH 28 /* window size changes */ 112 #define SIGINFO 29 /* information request */ 113 #endif 114 #if __POSIX_VISIBLE 115 #define SIGUSR1 30 /* user defined signal 1 */ 116 #define SIGUSR2 31 /* user defined signal 2 */ 117 #endif 118 #if __BSD_VISIBLE 119 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 120 #define SIGCKPT 33 /* checkpoint and continue */ 121 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 122 #endif 123 124 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 125 /* 126 * si_code stuff 127 */ 128 /* SIGILL */ 129 #define ILL_ILLOPC 1 /* Illegal opcode */ 130 #define ILL_ILLOPN 2 /* Illegal operand */ 131 #define ILL_ILLADR 3 /* Illegal addressing mode */ 132 #define ILL_ILLTRP 4 /* Illegal trap */ 133 #define ILL_PRVOPC 5 /* Privileged opcode */ 134 #define ILL_PRVREG 6 /* Privileged register */ 135 #define ILL_COPROC 7 /* Coprocessor error */ 136 #define ILL_BADSTK 8 /* Internal stack error */ 137 138 /* SIGFPE */ 139 #define FPE_INTOVF 1 /* Integer overflow */ 140 #define FPE_INTDIV 2 /* Integer divide by zero */ 141 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 142 #define FPE_FLTOVF 4 /* Floating point overflow */ 143 #define FPE_FLTUND 5 /* Floating point underflow */ 144 #define FPE_FLTRES 6 /* Floating point inexact result */ 145 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 146 #define FPE_FLTSUB 8 /* Subscript out of range */ 147 148 /* SIGSEGV */ 149 #define SEGV_MAPERR 1 /* Address not mapped to object */ 150 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 151 152 /* SIGBUS */ 153 #define BUS_ADRALN 1 /* Invalid address alignment */ 154 #define BUS_ADRERR 2 /* Non-existent physical address */ 155 #define BUS_OBJERR 3 /* Object specific hardware error */ 156 157 /* SIGTRAP */ 158 #define TRAP_BRKPT 1 /* Process breakpoint */ 159 #define TRAP_TRACE 2 /* Process trace trap */ 160 161 /* SIGCHLD */ 162 #define CLD_EXITED 1 /* Child has exited */ 163 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 164 /* did not create a core file */ 165 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 166 /* created a core file */ 167 #define CLD_TRAPPED 4 /* Traced child has trapped */ 168 #define CLD_STOPPED 5 /* Child has stopped */ 169 #define CLD_CONTINUED 6 /* Stopped child has continued */ 170 171 /* SIGPOLL */ 172 #define POLL_IN 1 /* Data input available */ 173 #define POLL_OUT 2 /* Output buffers available */ 174 #define POLL_MSG 3 /* Input message available */ 175 #define POLL_ERR 4 /* I/O Error */ 176 #define POLL_PRI 5 /* High priority input available */ 177 #define POLL_HUP 6 /* Device disconnected */ 178 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 179 180 181 #if __POSIX_VISIBLE 182 /** si_code */ 183 #define SI_USER 0 /* Sent by kill(2) */ 184 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 185 #define SI_TIMER -2 /* Generated by expiration of a timer */ 186 /* set by timer_settime(2) */ 187 #define SI_ASYNCIO -3 /* Generated by completion of an */ 188 /* asynchronous I/O signal */ 189 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 190 /* an empty message queue */ 191 #endif 192 193 /*- 194 * Type of a signal handling function. 195 * 196 * Language spec sez signal handlers take exactly one arg, even though we 197 * actually supply three. Ugh! 198 * 199 * We don't try to hide the difference by leaving out the args because 200 * that would cause warnings about conformant programs. Nonconformant 201 * programs can avoid the warnings by casting to (__sighandler_t *) or 202 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 203 * 204 * The kernel should reverse the cast before calling the function. It 205 * has no way to do this, but on most machines 1-arg and 3-arg functions 206 * have the same calling protocol so there is no problem in practice. 207 * A bit in sa_flags could be used to specify the number of args. 208 * 209 * SIG_EINTR causes system calls to interrupt but generates no signal 210 * delivery. The caller is responsible for polling the event. 211 */ 212 typedef void __sighandler_t (int); 213 214 #define SIG_DFL ((__sighandler_t *)0) 215 #define SIG_IGN ((__sighandler_t *)1) 216 #define SIG_ERR ((__sighandler_t *)-1) 217 218 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 219 union sigval { 220 int sival_int; 221 void *sival_ptr; 222 }; 223 #endif 224 225 #if __POSIX_VISIBLE >= 199309 226 struct sigevent { 227 int sigev_notify; /* Notification type */ 228 union { 229 int __sigev_signo; /* Signal number */ 230 int __sigev_notify_kqueue; 231 pthread_attr_t *__sigev_notify_attributes; 232 } __sigev_u; 233 union sigval sigev_value; /* Signal value */ 234 void (*sigev_notify_function)(union sigval); 235 }; 236 #define sigev_signo __sigev_u.__sigev_signo 237 #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes 238 #if __BSD_VISIBLE 239 #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue 240 #endif 241 242 #define SIGEV_NONE 0 /* No async notification */ 243 #define SIGEV_SIGNAL 1 /* Generate a queued signal */ 244 #define SIGEV_THREAD 2 /* Call back in a pthread */ 245 #if __BSD_VISIBLE 246 #define SIGEV_KEVENT 3 /* Generate a kevent */ 247 #endif 248 #endif /* __POSIX_VISIBLE >= 199309 */ 249 250 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 251 typedef struct __siginfo { 252 int si_signo; /* signal number */ 253 int si_errno; /* errno association */ 254 /* 255 * Cause of signal, one of the SI_ macros or signal-specific 256 * values, i.e. one of the FPE_... values for SIGFPE. This 257 * value is equivalent to the second argument to an old-style 258 * FreeBSD signal handler. 259 */ 260 int si_code; /* signal code */ 261 int si_pid; /* sending process */ 262 unsigned int si_uid; /* sender's ruid */ 263 int si_status; /* exit value */ 264 void *si_addr; /* faulting instruction */ 265 union sigval si_value; /* signal value */ 266 long si_band; /* band event for SIGPOLL */ 267 int __spare__[7]; /* gimme some slack */ 268 } siginfo_t; 269 #endif /* __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE */ 270 271 /* #if __POSIX_VISIBLE */ 272 typedef struct __sigset { 273 unsigned int __bits[_SIG_WORDS]; 274 } sigset_t; 275 /* #endif */ 276 277 /* 278 * XXX - there are some nasty dependencies on include file order. Now that 279 * sigset_t has been defined we can include the MD header. 280 */ 281 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 282 283 #if __POSIX_VISIBLE 284 struct __siginfo; 285 286 /* 287 * Signal vector "template" used in sigaction call. 288 */ 289 struct sigaction { 290 union { 291 void (*__sa_handler) (int); 292 void (*__sa_sigaction) (int, struct __siginfo *, void *); 293 } __sigaction_u; /* signal handler */ 294 int sa_flags; /* see signal options below */ 295 sigset_t sa_mask; /* signal mask to apply */ 296 }; 297 298 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 299 #define sa_handler __sigaction_u.__sa_handler 300 301 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 302 #endif /* __POSIX_VISIBLE */ 303 304 #if __XSI_VISIBLE 305 #define sa_sigaction __sigaction_u.__sa_sigaction 306 #endif 307 308 #if __XSI_VISIBLE 309 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 310 #define SA_RESTART 0x0002 /* restart system call on signal return */ 311 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 312 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 313 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 314 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 315 #endif 316 317 #if __BSD_VISIBLE 318 #define NSIG 64 /* size of sigptbl */ 319 320 /* Additional FreeBSD values. */ 321 #define SI_UNDEFINED 0 322 323 typedef void __siginfohandler_t (int, struct __siginfo *, void *); 324 325 #endif 326 327 /* XXX this should really be under __BSD_VISIBLE */ 328 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 329 330 /* #if __XSI_VISIBLE */ 331 /* 332 * Structure used in sigaltstack call. 333 */ 334 #if __BSD_VISIBLE 335 typedef struct sigaltstack { 336 #else 337 typedef struct { 338 #endif 339 char *ss_sp; /* signal stack base */ 340 __size_t ss_size; /* signal stack length */ 341 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 342 } stack_t; 343 344 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 345 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 346 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 347 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 348 /* #endif */ 349 350 /* Have enough typedefs for this now. XXX */ 351 #include <sys/ucontext.h> 352 353 #if __BSD_VISIBLE 354 /* 355 * 4.3 compatibility: 356 * Signal vector "template" used in sigvec call. 357 */ 358 struct sigvec { 359 __sighandler_t *sv_handler; /* signal handler */ 360 int sv_mask; /* signal mask to apply */ 361 int sv_flags; /* see signal options below */ 362 }; 363 364 #define SV_ONSTACK SA_ONSTACK 365 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 366 #define SV_RESETHAND SA_RESETHAND 367 #define SV_NODEFER SA_NODEFER 368 #define SV_NOCLDSTOP SA_NOCLDSTOP 369 #define SV_SIGINFO SA_SIGINFO 370 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 371 #endif 372 373 #if __BSD_VISIBLE || (__POSIX_VISIBLE && __POSIX_VISIBLE < 200809) 374 /* 375 * Macro for converting signal number to a mask suitable for 376 * sigblock(). 377 */ 378 #define sigmask(m) (1 << ((m)-1)) 379 #endif 380 381 #if __BSD_VISIBLE 382 #define BADSIG SIG_ERR 383 #endif 384 385 #if __POSIX_VISIBLE 386 /* 387 * Flags for sigprocmask: 388 */ 389 #define SIG_BLOCK 1 /* block specified signal set */ 390 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 391 #define SIG_SETMASK 3 /* set specified signal set */ 392 #endif 393 394 /* 395 * For historical reasons; programs expect signal's return value to be 396 * defined by <sys/signal.h>. 397 */ 398 __BEGIN_DECLS 399 __sighandler_t *signal (int, __sighandler_t *); 400 __END_DECLS 401 402 #endif /* !_SYS_SIGNAL_H_ */ 403