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 * $FreeBSD$ 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 #if __POSIX_VISIBLE >= 200809 49 50 #include <sys/_pthreadtypes.h> 51 #include <sys/_timespec.h> 52 53 #ifndef _SIZE_T_DECLARED 54 typedef __size_t size_t; 55 #define _SIZE_T_DECLARED 56 #endif 57 58 #ifndef _UID_T_DECLARED 59 typedef __uid_t uid_t; 60 #define _UID_T_DECLARED 61 #endif 62 63 #endif /* __POSIX_VISIBLE >= 200809 */ 64 65 /* 66 * System defined signals. 67 */ 68 #if __POSIX_VISIBLE || __XSI_VISIBLE 69 #define SIGHUP 1 /* hangup */ 70 #endif 71 #define SIGINT 2 /* interrupt */ 72 #if __POSIX_VISIBLE || __XSI_VISIBLE 73 #define SIGQUIT 3 /* quit */ 74 #endif 75 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 76 #if __XSI_VISIBLE 77 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 78 #endif 79 #define SIGABRT 6 /* abort() */ 80 #if __BSD_VISIBLE 81 #define SIGIOT SIGABRT /* compatibility */ 82 #define SIGEMT 7 /* EMT instruction */ 83 #endif 84 #define SIGFPE 8 /* floating point exception */ 85 #if __POSIX_VISIBLE || __XSI_VISIBLE 86 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 87 #endif 88 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 89 #define SIGBUS 10 /* bus error */ 90 #endif 91 #define SIGSEGV 11 /* segmentation violation */ 92 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 93 #define SIGSYS 12 /* non-existent system call invoked */ 94 #endif 95 #if __POSIX_VISIBLE || __XSI_VISIBLE 96 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 97 #define SIGALRM 14 /* alarm clock */ 98 #endif 99 #define SIGTERM 15 /* software termination signal from kill */ 100 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 101 #define SIGURG 16 /* urgent condition on IO channel */ 102 #endif 103 #if __POSIX_VISIBLE || __XSI_VISIBLE 104 #define SIGSTOP 17 /* sendable stop signal not from tty */ 105 #define SIGTSTP 18 /* stop signal from tty */ 106 #define SIGCONT 19 /* continue a stopped process */ 107 #define SIGCHLD 20 /* to parent on child stop or exit */ 108 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 109 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 110 #endif 111 #if __BSD_VISIBLE 112 #define SIGIO 23 /* input/output possible signal */ 113 #endif 114 #if __XSI_VISIBLE 115 #define SIGXCPU 24 /* exceeded CPU time limit */ 116 #define SIGXFSZ 25 /* exceeded file size limit */ 117 #define SIGVTALRM 26 /* virtual time alarm */ 118 #define SIGPROF 27 /* profiling time alarm */ 119 #endif 120 #if __BSD_VISIBLE 121 #define SIGWINCH 28 /* window size changes */ 122 #define SIGINFO 29 /* information request */ 123 #endif 124 #if __POSIX_VISIBLE || __XSI_VISIBLE 125 #define SIGUSR1 30 /* user defined signal 1 */ 126 #define SIGUSR2 31 /* user defined signal 2 */ 127 #endif 128 #if __BSD_VISIBLE 129 #define SIGTHR 32 /* reserved by thread library. */ 130 #define SIGLWP SIGTHR 131 #define SIGLIBRT 33 /* reserved by real-time library. */ 132 #endif 133 134 #define SIGRTMIN 65 135 #define SIGRTMAX 126 136 137 #define SIG_DFL ((__sighandler_t *)0) 138 #define SIG_IGN ((__sighandler_t *)1) 139 #define SIG_ERR ((__sighandler_t *)-1) 140 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */ 141 #define SIG_HOLD ((__sighandler_t *)3) 142 143 /* 144 * Type of a signal handling function. 145 * 146 * Language spec sez signal handlers take exactly one arg, even though we 147 * actually supply three. Ugh! 148 * 149 * We don't try to hide the difference by leaving out the args because 150 * that would cause warnings about conformant programs. Nonconformant 151 * programs can avoid the warnings by casting to (__sighandler_t *) or 152 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 153 * 154 * The kernel should reverse the cast before calling the function. It 155 * has no way to do this, but on most machines 1-arg and 3-arg functions 156 * have the same calling protocol so there is no problem in practice. 157 * A bit in sa_flags could be used to specify the number of args. 158 */ 159 typedef void __sighandler_t(int); 160 161 #if __POSIX_VISIBLE || __XSI_VISIBLE 162 #ifndef _SIGSET_T_DECLARED 163 #define _SIGSET_T_DECLARED 164 typedef __sigset_t sigset_t; 165 #endif 166 #endif 167 168 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 169 union sigval { 170 /* Members as suggested by Annex C of POSIX 1003.1b. */ 171 int sival_int; 172 void *sival_ptr; 173 /* 6.0 compatibility */ 174 int sigval_int; 175 void *sigval_ptr; 176 }; 177 178 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 179 union sigval32 { 180 int sival_int; 181 uint32_t sival_ptr; 182 /* 6.0 compatibility */ 183 int sigval_int; 184 uint32_t sigval_ptr; 185 }; 186 #endif 187 #endif 188 189 #if __POSIX_VISIBLE >= 199309 190 191 struct pthread_attr; 192 193 struct sigevent { 194 int sigev_notify; /* Notification type */ 195 int sigev_signo; /* Signal number */ 196 union sigval sigev_value; /* Signal value */ 197 union { 198 __lwpid_t _threadid; 199 struct { 200 void (*_function)(union sigval); 201 struct pthread_attr **_attribute; 202 } _sigev_thread; 203 unsigned short _kevent_flags; 204 long __spare__[8]; 205 } _sigev_un; 206 }; 207 208 #if __BSD_VISIBLE 209 #define sigev_notify_kqueue sigev_signo 210 #define sigev_notify_kevent_flags _sigev_un._kevent_flags 211 #define sigev_notify_thread_id _sigev_un._threadid 212 #endif 213 #define sigev_notify_function _sigev_un._sigev_thread._function 214 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 215 216 #define SIGEV_NONE 0 /* No async notification. */ 217 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */ 218 #define SIGEV_THREAD 2 /* Call back from another pthread. */ 219 #if __BSD_VISIBLE 220 #define SIGEV_KEVENT 3 /* Generate a kevent. */ 221 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */ 222 #endif 223 224 #endif /* __POSIX_VISIBLE >= 199309 */ 225 226 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 227 typedef struct __siginfo { 228 int si_signo; /* signal number */ 229 int si_errno; /* errno association */ 230 /* 231 * Cause of signal, one of the SI_ macros or signal-specific 232 * values, i.e. one of the FPE_... values for SIGFPE. This 233 * value is equivalent to the second argument to an old-style 234 * FreeBSD signal handler. 235 */ 236 int si_code; /* signal code */ 237 __pid_t si_pid; /* sending process */ 238 __uid_t si_uid; /* sender's ruid */ 239 int si_status; /* exit value */ 240 void *si_addr; /* faulting instruction */ 241 union sigval si_value; /* signal value */ 242 union { 243 struct { 244 int _trapno;/* machine specific trap code */ 245 } _fault; 246 struct { 247 int _timerid; 248 int _overrun; 249 } _timer; 250 struct { 251 int _mqd; 252 } _mesgq; 253 struct { 254 long _band; /* band event for SIGPOLL */ 255 } _poll; /* was this ever used ? */ 256 struct { 257 long __spare1__; 258 int __spare2__[7]; 259 } __spare__; 260 } _reason; 261 } siginfo_t; 262 263 #define si_trapno _reason._fault._trapno 264 #define si_timerid _reason._timer._timerid 265 #define si_overrun _reason._timer._overrun 266 #define si_mqd _reason._mesgq._mqd 267 #define si_band _reason._poll._band 268 269 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 270 struct siginfo32 { 271 int si_signo; /* signal number */ 272 int si_errno; /* errno association */ 273 int si_code; /* signal code */ 274 __pid_t si_pid; /* sending process */ 275 __uid_t si_uid; /* sender's ruid */ 276 int si_status; /* exit value */ 277 uint32_t si_addr; /* faulting instruction */ 278 union sigval32 si_value; /* signal value */ 279 union { 280 struct { 281 int _trapno;/* machine specific trap code */ 282 } _fault; 283 struct { 284 int _timerid; 285 int _overrun; 286 } _timer; 287 struct { 288 int _mqd; 289 } _mesgq; 290 struct { 291 int32_t _band; /* band event for SIGPOLL */ 292 } _poll; /* was this ever used ? */ 293 struct { 294 int32_t __spare1__; 295 int __spare2__[7]; 296 } __spare__; 297 } _reason; 298 }; 299 #endif 300 301 /** si_code **/ 302 /* codes for SIGILL */ 303 #define ILL_ILLOPC 1 /* Illegal opcode. */ 304 #define ILL_ILLOPN 2 /* Illegal operand. */ 305 #define ILL_ILLADR 3 /* Illegal addressing mode. */ 306 #define ILL_ILLTRP 4 /* Illegal trap. */ 307 #define ILL_PRVOPC 5 /* Privileged opcode. */ 308 #define ILL_PRVREG 6 /* Privileged register. */ 309 #define ILL_COPROC 7 /* Coprocessor error. */ 310 #define ILL_BADSTK 8 /* Internal stack error. */ 311 312 /* codes for SIGBUS */ 313 #define BUS_ADRALN 1 /* Invalid address alignment. */ 314 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 315 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 316 317 /* codes for SIGSEGV */ 318 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 319 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 320 /* object. */ 321 322 /* codes for SIGFPE */ 323 #define FPE_INTOVF 1 /* Integer overflow. */ 324 #define FPE_INTDIV 2 /* Integer divide by zero. */ 325 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 326 #define FPE_FLTOVF 4 /* Floating point overflow. */ 327 #define FPE_FLTUND 5 /* Floating point underflow. */ 328 #define FPE_FLTRES 6 /* Floating point inexact result. */ 329 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 330 #define FPE_FLTSUB 8 /* Subscript out of range. */ 331 332 /* codes for SIGTRAP */ 333 #define TRAP_BRKPT 1 /* Process breakpoint. */ 334 #define TRAP_TRACE 2 /* Process trace trap. */ 335 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 336 #define TRAP_CAP 4 /* Capabilities protective trap. */ 337 338 /* codes for SIGCHLD */ 339 #define CLD_EXITED 1 /* Child has exited */ 340 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 341 /* did not create a core file */ 342 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 343 /* created a core file */ 344 #define CLD_TRAPPED 4 /* Traced child has trapped */ 345 #define CLD_STOPPED 5 /* Child has stopped */ 346 #define CLD_CONTINUED 6 /* Stopped child has continued */ 347 348 /* codes for SIGPOLL */ 349 #define POLL_IN 1 /* Data input available */ 350 #define POLL_OUT 2 /* Output buffers available */ 351 #define POLL_MSG 3 /* Input message available */ 352 #define POLL_ERR 4 /* I/O Error */ 353 #define POLL_PRI 5 /* High priority input available */ 354 #define POLL_HUP 6 /* Device disconnected */ 355 356 #endif 357 358 #if __POSIX_VISIBLE || __XSI_VISIBLE 359 struct __siginfo; 360 361 /* 362 * Signal vector "template" used in sigaction call. 363 */ 364 struct sigaction { 365 union { 366 void (*__sa_handler)(int); 367 void (*__sa_sigaction)(int, struct __siginfo *, void *); 368 } __sigaction_u; /* signal handler */ 369 int sa_flags; /* see signal options below */ 370 sigset_t sa_mask; /* signal mask to apply */ 371 }; 372 373 #define sa_handler __sigaction_u.__sa_handler 374 #endif 375 376 #if __XSI_VISIBLE 377 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */ 378 #define sa_sigaction __sigaction_u.__sa_sigaction 379 #endif 380 381 #if __POSIX_VISIBLE || __XSI_VISIBLE 382 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 383 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 384 385 #if __XSI_VISIBLE 386 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 387 #define SA_RESTART 0x0002 /* restart system call on signal return */ 388 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 389 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 390 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 391 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 392 #endif 393 394 #if __BSD_VISIBLE 395 #define NSIG 32 /* number of old signals (counting 0) */ 396 #endif 397 398 #if __POSIX_VISIBLE || __XSI_VISIBLE 399 #define SI_NOINFO 0 /* No signal info besides si_signo. */ 400 #define SI_USER 0x10001 /* Signal sent by kill(). */ 401 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 402 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 403 /* a timer set by timer_settime(). */ 404 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 405 /* an asynchronous I/O request.*/ 406 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 407 /* message on an empty message queue. */ 408 #define SI_KERNEL 0x10006 409 #define SI_LWP 0x10007 /* Signal sent by thr_kill */ 410 #endif 411 #if __BSD_VISIBLE 412 #define SI_UNDEFINED 0 413 #endif 414 415 #if __BSD_VISIBLE 416 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 417 typedef void __siginfohandler_t(int, struct __siginfo *, void *); 418 #endif 419 420 #if __XSI_VISIBLE 421 #if __BSD_VISIBLE 422 #define __stack_t sigaltstack 423 #endif 424 typedef struct __stack_t stack_t; 425 426 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 427 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 428 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */ 429 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 430 #endif 431 432 /* 433 * Structure used in sigaltstack call. Its definition is always 434 * needed for __ucontext. If __BSD_VISIBLE is defined, the structure 435 * tag is actually sigaltstack. 436 */ 437 struct __stack_t { 438 void *ss_sp; /* signal stack base */ 439 __size_t ss_size; /* signal stack length */ 440 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 441 }; 442 443 #if __BSD_VISIBLE 444 /* 445 * 4.3 compatibility: 446 * Signal vector "template" used in sigvec call. 447 */ 448 struct sigvec { 449 __sighandler_t *sv_handler; /* signal handler */ 450 int sv_mask; /* signal mask to apply */ 451 int sv_flags; /* see signal options below */ 452 }; 453 454 #define SV_ONSTACK SA_ONSTACK 455 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 456 #define SV_RESETHAND SA_RESETHAND 457 #define SV_NODEFER SA_NODEFER 458 #define SV_NOCLDSTOP SA_NOCLDSTOP 459 #define SV_SIGINFO SA_SIGINFO 460 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 461 #endif 462 463 /* Keep this in one place only */ 464 #if defined(_KERNEL) && defined(COMPAT_43) && \ 465 !defined(__i386__) 466 struct osigcontext { 467 int _not_used; 468 }; 469 #endif 470 471 #if __XSI_VISIBLE 472 /* 473 * Structure used in sigstack call. 474 */ 475 struct sigstack { 476 void *ss_sp; /* signal stack pointer */ 477 int ss_onstack; /* current status */ 478 }; 479 #endif 480 481 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 482 /* 483 * Macro for converting signal number to a mask suitable for 484 * sigblock(). 485 */ 486 #define sigmask(m) (1 << ((m)-1)) 487 #endif 488 489 #if __BSD_VISIBLE 490 #define BADSIG SIG_ERR 491 #endif 492 493 #if __POSIX_VISIBLE || __XSI_VISIBLE 494 /* 495 * Flags for sigprocmask: 496 */ 497 #define SIG_BLOCK 1 /* block specified signal set */ 498 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 499 #define SIG_SETMASK 3 /* set specified signal set */ 500 #endif 501 502 /* 503 * For historical reasons; programs expect signal's return value to be 504 * defined by <sys/signal.h>. 505 */ 506 __BEGIN_DECLS 507 __sighandler_t *signal(int, __sighandler_t *); 508 __END_DECLS 509 510 #endif /* !_SYS_SIGNAL_H_ */ 511