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 * 4. 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: stable/9/sys/sys/signal.h 232290 2012-02-29 06:19:00Z davidxu $ 36 */ 37 38 #ifndef _SYS_SIGNAL_H_ 39 #define _SYS_SIGNAL_H_ 40 41 #include <sys/cdefs.h> 42 #include <sys/_types.h> 43 #include <sys/_sigset.h> 44 45 #include <machine/_limits.h> /* __MINSIGSTKSZ */ 46 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 47 48 /* 49 * System defined signals. 50 */ 51 #if __POSIX_VISIBLE || __XSI_VISIBLE 52 #define SIGHUP 1 /* hangup */ 53 #endif 54 #define SIGINT 2 /* interrupt */ 55 #if __POSIX_VISIBLE || __XSI_VISIBLE 56 #define SIGQUIT 3 /* quit */ 57 #endif 58 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 59 #if __XSI_VISIBLE 60 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 61 #endif 62 #define SIGABRT 6 /* abort() */ 63 #if __BSD_VISIBLE 64 #define SIGIOT SIGABRT /* compatibility */ 65 #define SIGEMT 7 /* EMT instruction */ 66 #endif 67 #define SIGFPE 8 /* floating point exception */ 68 #if __POSIX_VISIBLE || __XSI_VISIBLE 69 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 70 #endif 71 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 72 #define SIGBUS 10 /* bus error */ 73 #endif 74 #define SIGSEGV 11 /* segmentation violation */ 75 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 76 #define SIGSYS 12 /* non-existent system call invoked */ 77 #endif 78 #if __POSIX_VISIBLE || __XSI_VISIBLE 79 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 80 #define SIGALRM 14 /* alarm clock */ 81 #endif 82 #define SIGTERM 15 /* software termination signal from kill */ 83 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 84 #define SIGURG 16 /* urgent condition on IO channel */ 85 #endif 86 #if __POSIX_VISIBLE || __XSI_VISIBLE 87 #define SIGSTOP 17 /* sendable stop signal not from tty */ 88 #define SIGTSTP 18 /* stop signal from tty */ 89 #define SIGCONT 19 /* continue a stopped process */ 90 #define SIGCHLD 20 /* to parent on child stop or exit */ 91 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 92 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 93 #endif 94 #if __BSD_VISIBLE 95 #define SIGIO 23 /* input/output possible signal */ 96 #endif 97 #if __XSI_VISIBLE 98 #define SIGXCPU 24 /* exceeded CPU time limit */ 99 #define SIGXFSZ 25 /* exceeded file size limit */ 100 #define SIGVTALRM 26 /* virtual time alarm */ 101 #define SIGPROF 27 /* profiling time alarm */ 102 #endif 103 #if __BSD_VISIBLE 104 #define SIGWINCH 28 /* window size changes */ 105 #define SIGINFO 29 /* information request */ 106 #endif 107 #if __POSIX_VISIBLE || __XSI_VISIBLE 108 #define SIGUSR1 30 /* user defined signal 1 */ 109 #define SIGUSR2 31 /* user defined signal 2 */ 110 #endif 111 #if __BSD_VISIBLE 112 #define SIGTHR 32 /* reserved by thread library. */ 113 #define SIGLWP SIGTHR 114 #endif 115 116 #define SIGRTMIN 65 117 #define SIGRTMAX 126 118 119 #define SIG_DFL ((__sighandler_t *)0) 120 #define SIG_IGN ((__sighandler_t *)1) 121 #define SIG_ERR ((__sighandler_t *)-1) 122 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */ 123 #define SIG_HOLD ((__sighandler_t *)3) 124 125 /* 126 * Type of a signal handling function. 127 * 128 * Language spec sez signal handlers take exactly one arg, even though we 129 * actually supply three. Ugh! 130 * 131 * We don't try to hide the difference by leaving out the args because 132 * that would cause warnings about conformant programs. Nonconformant 133 * programs can avoid the warnings by casting to (__sighandler_t *) or 134 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 135 * 136 * The kernel should reverse the cast before calling the function. It 137 * has no way to do this, but on most machines 1-arg and 3-arg functions 138 * have the same calling protocol so there is no problem in practice. 139 * A bit in sa_flags could be used to specify the number of args. 140 */ 141 typedef void __sighandler_t(int); 142 143 #if __POSIX_VISIBLE || __XSI_VISIBLE 144 #ifndef _SIGSET_T_DECLARED 145 #define _SIGSET_T_DECLARED 146 typedef __sigset_t sigset_t; 147 #endif 148 #endif 149 150 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 151 union sigval { 152 /* Members as suggested by Annex C of POSIX 1003.1b. */ 153 int sival_int; 154 void *sival_ptr; 155 /* 6.0 compatibility */ 156 int sigval_int; 157 void *sigval_ptr; 158 }; 159 #endif 160 161 #if __POSIX_VISIBLE >= 199309 162 struct sigevent { 163 int sigev_notify; /* Notification type */ 164 int sigev_signo; /* Signal number */ 165 union sigval sigev_value; /* Signal value */ 166 union { 167 __lwpid_t _threadid; 168 struct { 169 void (*_function)(union sigval); 170 void *_attribute; /* pthread_attr_t * */ 171 } _sigev_thread; 172 unsigned short _kevent_flags; 173 long __spare__[8]; 174 } _sigev_un; 175 }; 176 177 #if __BSD_VISIBLE 178 #define sigev_notify_kqueue sigev_signo 179 #define sigev_notify_kevent_flags _sigev_un._kevent_flags 180 #define sigev_notify_thread_id _sigev_un._threadid 181 #endif 182 #define sigev_notify_function _sigev_un._sigev_thread._function 183 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 184 185 #define SIGEV_NONE 0 /* No async notification. */ 186 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */ 187 #define SIGEV_THREAD 2 /* Call back from another pthread. */ 188 #if __BSD_VISIBLE 189 #define SIGEV_KEVENT 3 /* Generate a kevent. */ 190 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */ 191 #endif 192 #endif /* __POSIX_VISIBLE >= 199309 */ 193 194 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 195 typedef struct __siginfo { 196 int si_signo; /* signal number */ 197 int si_errno; /* errno association */ 198 /* 199 * Cause of signal, one of the SI_ macros or signal-specific 200 * values, i.e. one of the FPE_... values for SIGFPE. This 201 * value is equivalent to the second argument to an old-style 202 * FreeBSD signal handler. 203 */ 204 int si_code; /* signal code */ 205 __pid_t si_pid; /* sending process */ 206 __uid_t si_uid; /* sender's ruid */ 207 int si_status; /* exit value */ 208 void *si_addr; /* faulting instruction */ 209 union sigval si_value; /* signal value */ 210 union { 211 struct { 212 int _trapno;/* machine specific trap code */ 213 } _fault; 214 struct { 215 int _timerid; 216 int _overrun; 217 } _timer; 218 struct { 219 int _mqd; 220 } _mesgq; 221 struct { 222 long _band; /* band event for SIGPOLL */ 223 } _poll; /* was this ever used ? */ 224 struct { 225 long __spare1__; 226 int __spare2__[7]; 227 } __spare__; 228 } _reason; 229 } siginfo_t; 230 231 #define si_trapno _reason._fault._trapno 232 #define si_timerid _reason._timer._timerid 233 #define si_overrun _reason._timer._overrun 234 #define si_mqd _reason._mesgq._mqd 235 #define si_band _reason._poll._band 236 237 /** si_code **/ 238 /* codes for SIGILL */ 239 #define ILL_ILLOPC 1 /* Illegal opcode. */ 240 #define ILL_ILLOPN 2 /* Illegal operand. */ 241 #define ILL_ILLADR 3 /* Illegal addressing mode. */ 242 #define ILL_ILLTRP 4 /* Illegal trap. */ 243 #define ILL_PRVOPC 5 /* Privileged opcode. */ 244 #define ILL_PRVREG 6 /* Privileged register. */ 245 #define ILL_COPROC 7 /* Coprocessor error. */ 246 #define ILL_BADSTK 8 /* Internal stack error. */ 247 248 /* codes for SIGBUS */ 249 #define BUS_ADRALN 1 /* Invalid address alignment. */ 250 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 251 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 252 253 /* codes for SIGSEGV */ 254 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 255 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 256 /* object. */ 257 258 /* codes for SIGFPE */ 259 #define FPE_INTOVF 1 /* Integer overflow. */ 260 #define FPE_INTDIV 2 /* Integer divide by zero. */ 261 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 262 #define FPE_FLTOVF 4 /* Floating point overflow. */ 263 #define FPE_FLTUND 5 /* Floating point underflow. */ 264 #define FPE_FLTRES 6 /* Floating point inexact result. */ 265 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 266 #define FPE_FLTSUB 8 /* Subscript out of range. */ 267 268 /* codes for SIGTRAP */ 269 #define TRAP_BRKPT 1 /* Process breakpoint. */ 270 #define TRAP_TRACE 2 /* Process trace trap. */ 271 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 272 273 /* codes for SIGCHLD */ 274 #define CLD_EXITED 1 /* Child has exited */ 275 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 276 /* did not create a core file */ 277 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 278 /* created a core file */ 279 #define CLD_TRAPPED 4 /* Traced child has trapped */ 280 #define CLD_STOPPED 5 /* Child has stopped */ 281 #define CLD_CONTINUED 6 /* Stopped child has continued */ 282 283 /* codes for SIGPOLL */ 284 #define POLL_IN 1 /* Data input available */ 285 #define POLL_OUT 2 /* Output buffers available */ 286 #define POLL_MSG 3 /* Input message available */ 287 #define POLL_ERR 4 /* I/O Error */ 288 #define POLL_PRI 5 /* High priority input available */ 289 #define POLL_HUP 6 /* Device disconnected */ 290 291 #endif 292 293 #if __POSIX_VISIBLE || __XSI_VISIBLE 294 struct __siginfo; 295 296 /* 297 * Signal vector "template" used in sigaction call. 298 */ 299 struct sigaction { 300 union { 301 void (*__sa_handler)(int); 302 void (*__sa_sigaction)(int, struct __siginfo *, void *); 303 } __sigaction_u; /* signal handler */ 304 int sa_flags; /* see signal options below */ 305 sigset_t sa_mask; /* signal mask to apply */ 306 }; 307 308 #define sa_handler __sigaction_u.__sa_handler 309 #endif 310 311 #if __XSI_VISIBLE 312 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */ 313 #define sa_sigaction __sigaction_u.__sa_sigaction 314 #endif 315 316 #if __POSIX_VISIBLE || __XSI_VISIBLE 317 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 318 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 319 320 #if __XSI_VISIBLE 321 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 322 #define SA_RESTART 0x0002 /* restart system call on signal return */ 323 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 324 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 325 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 326 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 327 #endif 328 329 #if __BSD_VISIBLE 330 #define NSIG 32 /* number of old signals (counting 0) */ 331 #endif 332 333 #if __POSIX_VISIBLE || __XSI_VISIBLE 334 #define SI_NOINFO 0 /* No signal info besides si_signo. */ 335 #define SI_USER 0x10001 /* Signal sent by kill(). */ 336 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 337 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 338 /* a timer set by timer_settime(). */ 339 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 340 /* an asynchronous I/O request.*/ 341 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 342 /* message on an empty message queue. */ 343 #define SI_KERNEL 0x10006 344 #define SI_LWP 0x10007 /* Signal sent by thr_kill */ 345 #endif 346 #if __BSD_VISIBLE 347 #define SI_UNDEFINED 0 348 #endif 349 350 #if __BSD_VISIBLE 351 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 352 typedef void __siginfohandler_t(int, struct __siginfo *, void *); 353 #endif 354 355 #if __XSI_VISIBLE 356 /* 357 * Structure used in sigaltstack call. 358 */ 359 #if __BSD_VISIBLE 360 typedef struct sigaltstack { 361 #else 362 typedef struct { 363 #endif 364 char *ss_sp; /* signal stack base */ 365 __size_t ss_size; /* signal stack length */ 366 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 367 } stack_t; 368 369 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 370 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 371 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */ 372 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 373 #endif 374 375 #if __BSD_VISIBLE 376 /* 377 * 4.3 compatibility: 378 * Signal vector "template" used in sigvec call. 379 */ 380 struct sigvec { 381 __sighandler_t *sv_handler; /* signal handler */ 382 int sv_mask; /* signal mask to apply */ 383 int sv_flags; /* see signal options below */ 384 }; 385 386 #define SV_ONSTACK SA_ONSTACK 387 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 388 #define SV_RESETHAND SA_RESETHAND 389 #define SV_NODEFER SA_NODEFER 390 #define SV_NOCLDSTOP SA_NOCLDSTOP 391 #define SV_SIGINFO SA_SIGINFO 392 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 393 #endif 394 395 /* Keep this in one place only */ 396 #if defined(_KERNEL) && defined(COMPAT_43) && \ 397 !defined(__i386__) 398 struct osigcontext { 399 int _not_used; 400 }; 401 #endif 402 403 #if __XSI_VISIBLE 404 /* 405 * Structure used in sigstack call. 406 */ 407 struct sigstack { 408 /* XXX ss_sp's type should be `void *'. */ 409 char *ss_sp; /* signal stack pointer */ 410 int ss_onstack; /* current status */ 411 }; 412 #endif 413 414 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 415 /* 416 * Macro for converting signal number to a mask suitable for 417 * sigblock(). 418 */ 419 #define sigmask(m) (1 << ((m)-1)) 420 #endif 421 422 #if __BSD_VISIBLE 423 #define BADSIG SIG_ERR 424 #endif 425 426 #if __POSIX_VISIBLE || __XSI_VISIBLE 427 /* 428 * Flags for sigprocmask: 429 */ 430 #define SIG_BLOCK 1 /* block specified signal set */ 431 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 432 #define SIG_SETMASK 3 /* set specified signal set */ 433 #endif 434 435 /* 436 * For historical reasons; programs expect signal's return value to be 437 * defined by <sys/signal.h>. 438 */ 439 __BEGIN_DECLS 440 __sighandler_t *signal(int, __sighandler_t *); 441 __END_DECLS 442 443 #endif /* !_SYS_SIGNAL_H_ */ 444