signal.h (original) (raw)

FreeBSD/Linux Kernel Cross Reference

[1](source/sys/signal.h#L1) **_/*-_**
[2](source/sys/signal.h#L2)   **_* SPDX-License-Identifier: BSD-3-Clause_**
[3](source/sys/signal.h#L3)   **_*_**
[4](source/sys/signal.h#L4)   **_* Copyright (c) 1982, 1986, 1989, 1991, 1993_**
[5](source/sys/signal.h#L5)   **_*      The Regents of the University of California.  All rights reserved._**
[6](source/sys/signal.h#L6)   **_* (c) UNIX System Laboratories, Inc._**
[7](source/sys/signal.h#L7)   **_* All or some portions of this file are derived from material licensed_**
[8](source/sys/signal.h#L8)   **_* to the University of California by American Telephone and Telegraph_**
[9](source/sys/signal.h#L9)   **_* Co. or Unix System Laboratories, Inc. and are reproduced herein with_**

10 _ the permission of UNIX System Laboratories, Inc._* 11 * 12 _ Redistribution and use in source and binary forms, with or without_* 13 _ modification, are permitted provided that the following conditions_* 14 _ are met:_* 15 _ 1. Redistributions of source code must retain the above copyright_* 16 _ notice, this list of conditions and the following disclaimer._* 17 _ 2. Redistributions in binary form must reproduce the above copyright_* 18 _ notice, this list of conditions and the following disclaimer in the_* 19 _ documentation and/or other materials provided with the distribution._* 20 _ 3. Neither the name of the University nor the names of its contributors_* 21 _ may be used to endorse or promote products derived from this software_* 22 _ without specific prior written permission._* 23 * 24 _ THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND_* 25 _ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE_* 26 _ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE_* 27 _ ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE_* 28 _ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL_* 29 _ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS_* 30 _ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)_* 31 _ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT_* 32 _ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY_* 33 _ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF_* 34 _ SUCH DAMAGE._* 35 * 36 _ @(#)signal.h 8.4 (Berkeley) 5/4/95_* 37 _ FreeBSDFreeBSDFreeBSD_* 38 */ 39 40 #ifndef SYS_SIGNAL_H 41 #define SYS_SIGNAL_H 42 43 #include <sys/cdefs.h> 44 #include <sys/types.h> 45 #include <sys/_sigset.h> 46 47 #include <machine/_limits.h> /* _MINSIGSTKSZ / 48 #include <machine/signal.h> / sig_atomic_t; trap codes; sigcontext */ 49 50 #if __POSIX_VISIBLE >= 200809 51 52 #include <sys/_pthreadtypes.h> 53 #include <sys/_timespec.h> 54 55 #ifndef _SIZE_T_DECLARED 56 typedef __size_t size_t; 57 #define _SIZE_T_DECLARED 58 #endif 59 60 #ifndef _UID_T_DECLARED 61 typedef __uid_t uid_t; 62 #define _UID_T_DECLARED 63 #endif 64 65 #endif **/* POSIXVISIBLE >= 200809 */** 66 67 **_/*** 68 _ System defined signals._* 69 */ 70 #if __POSIX_VISIBLE || __XSI_VISIBLE 71 #define SIGHUP 1 /* hangup */ 72 #endif 73 #define SIGINT 2 /* interrupt */ 74 #if __POSIX_VISIBLE || __XSI_VISIBLE 75 #define SIGQUIT 3 /* quit */ 76 #endif 77 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 78 #if __XSI_VISIBLE 79 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 80 #endif 81 #define SIGABRT 6 /* abort() */ 82 #if __BSD_VISIBLE 83 #define SIGIOT SIGABRT /* compatibility */ 84 #define SIGEMT 7 /* EMT instruction */ 85 #endif 86 #define SIGFPE 8 /* floating point exception */ 87 #if __POSIX_VISIBLE || __XSI_VISIBLE 88 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 89 #endif 90 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 91 #define SIGBUS 10 /* bus error */ 92 #endif 93 #define SIGSEGV 11 /* segmentation violation */ 94 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 95 #define SIGSYS 12 /* non-existent system call invoked */ 96 #endif 97 #if __POSIX_VISIBLE || __XSI_VISIBLE 98 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 99 #define SIGALRM 14 /* alarm clock */ 100 #endif 101 #define SIGTERM 15 /* software termination signal from kill */ 102 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 103 #define SIGURG 16 /* urgent condition on IO channel */ 104 #endif 105 #if __POSIX_VISIBLE || __XSI_VISIBLE 106 #define SIGSTOP 17 /* sendable stop signal not from tty */ 107 #define SIGTSTP 18 /* stop signal from tty */ 108 #define SIGCONT 19 /* continue a stopped process */ 109 #define SIGCHLD 20 /* to parent on child stop or exit */ 110 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 111 #define SIGTTOU 22 /* like TTIN if (tp->tlocal&LTOSTOP) */ 112 #endif 113 #if __BSD_VISIBLE 114 #define SIGIO 23 /* input/output possible signal */ 115 #endif 116 #if __XSI_VISIBLE 117 #define SIGXCPU 24 /* exceeded CPU time limit */ 118 #define SIGXFSZ 25 /* exceeded file size limit */ 119 #define SIGVTALRM 26 /* virtual time alarm */ 120 #define SIGPROF 27 /* profiling time alarm */ 121 #endif 122 #if __BSD_VISIBLE 123 #define SIGWINCH 28 /* window size changes */ 124 #define SIGINFO 29 /* information request */ 125 #endif 126 #if __POSIX_VISIBLE || __XSI_VISIBLE 127 #define SIGUSR1 30 /* user defined signal 1 */ 128 #define SIGUSR2 31 /* user defined signal 2 */ 129 #endif 130 #if __BSD_VISIBLE 131 #define SIGTHR 32 /* reserved by thread library. */ 132 #define SIGLWP SIGTHR 133 #define SIGLIBRT 33 /* reserved by real-time library. */ 134 #endif 135 136 #define SIGRTMIN 65 137 #define SIGRTMAX 126 138 139 #define SIG_DFL ((__sighandler_t )0) 140 #define SIG_IGN ((__sighandler_t )1) 141 #define SIG_ERR ((__sighandler_t )-1) 142 **_/* #define SIGCATCH ((sighandlert *)2) See signalvar.h */** 143 #define SIG_HOLD ((__sighandler_t )3) 144 145 **_/_ 146 _ Type of a signal handling function._* 147 **_*_* 148 _ Language spec sez signal handlers take exactly one arg, even though we_ 149 _ actually supply three. Ugh!_ 150 * 151 _ We don't try to hide the difference by leaving out the args because_* 152 _ that would cause warnings about conformant programs. Nonconformant_* 153 _* programs can avoid the warnings by casting to (sighandlert *) or 154 _ sigt before calling signal() or assigning to sahandler or svhandler._* 155 * 156 _ The kernel should reverse the cast before calling the function. It_* 157 _ has no way to do this, but on most machines 1-arg and 3-arg functions_* 158 _ have the same calling protocol so there is no problem in practice._* 159 _ A bit in saflags could be used to specify the number of args._* 160 */ 161 typedef void __sighandler_t(int); 162 163 #if __POSIX_VISIBLE || __XSI_VISIBLE 164 #ifndef _SIGSET_T_DECLARED 165 #define _SIGSET_T_DECLARED 166 typedef __sigset_t sigset_t; 167 #endif 168 #endif 169 170 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 171 union sigval { 172 /* Members as suggested by Annex C of POSIX 1003.1b. */ 173 int sival_int; 174 void sival_ptr; 175 /* 6.0 compatibility */ 176 int sigval_int; 177 void sigval_ptr; 178 }; 179 180 #if defined(WANT_LWPINFO32) || (defined(_KERNEL) && defined(LP64)) 181 union sigval32 { 182 int sival_int; 183 uint32_t sival_ptr; 184 **/* 6.0 compatibility /_* 185 int sigval_int; 186 uint32_t sigval_ptr; 187 }; 188 #endif 189 #endif 190 191 #if __POSIX_VISIBLE >= 199309 192 193 struct pthread_attr; 194 195 struct sigevent { 196 int sigev_notify; /* Notification type */ 197 int sigev_signo; /* Signal number */ 198 union sigval sigev_value; /* Signal value */ 199 union { 200 __lwpid_t _threadid; 201 struct { 202 void (function)(union sigval); 203 struct pthread_attr **attribute; 204 } sigev_thread; 205 unsigned short kevent_flags; 206 long spare[8]; 207 } sigev_un; 208 }; 209 210 #if __BSD_VISIBLE 211 #define sigev_notify_kqueue sigev_signo 212 #define sigev_notify_kevent_flags sigev_un.kevent_flags 213 #define sigev_notify_thread_id sigev_un.threadid 214 #endif 215 #define sigev_notify_function sigev_un.sigev_thread.function 216 #define sigev_notify_attributes sigev_un.sigev_thread.attribute 217 218 #define SIGEV_NONE 0 **/* No async notification. */** 219 #define SIGEV_SIGNAL 1 **/* Generate a queued signal. */** 220 #define SIGEV_THREAD 2 **/* Call back from another pthread. */** 221 #if __BSD_VISIBLE 222 #define SIGEV_KEVENT 3 **/* Generate a kevent. */** 223 #define SIGEV_THREAD_ID 4 **/* Send signal to a kernel thread. */** 224 #endif 225 226 #endif **/* POSIXVISIBLE >= 199309 */** 227 228 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 229 typedef struct __siginfo { 230 int si_signo; **/* signal number */** 231 int si_errno; **/* errno association */** 232 /* 233 _ Cause of signal, one of the SI macros or signal-specific_* 234 _ values, i.e. one of the FPE... values for SIGFPE. This_ 235 _ value is equivalent to the second argument to an old-style_* 236 _ FreeBSD signal handler._* 237 */ 238 int si_code; /* signal code */ 239 __pid_t si_pid; /* sending process */ 240 __uid_t si_uid; /* sender's ruid */ 241 int si_status; /* exit value */ 242 void si_addr; /* faulting instruction */ 243 union sigval si_value; /* signal value */ 244 union { 245 struct { 246 int trapno;**/ machine specific trap code /_* 247 } fault; 248 struct { 249 int timerid; 250 int overrun; 251 } timer; 252 struct { 253 int mqd; 254 } mesgq; 255 struct { 256 long band; **/* band event for SIGPOLL */** 257 } poll; **/* was this ever used ? */** 258 struct { 259 int syscall; **/* Syscall number for signals** 260 *** delivered as a result of** 261 *** system calls denied by_** 262 * Capsicum. */ 263 } capsicum; 264 struct { 265 long spare1; 266 int spare2[7]; 267 } spare; 268 } reason; 269 } siginfo_t; 270 271 #define si_trapno reason.fault.trapno 272 #define si_timerid reason.timer.timerid 273 #define si_overrun reason.timer.overrun 274 #define si_mqd reason.mesgq.mqd 275 #define si_band reason.poll.band 276 #define si_syscall reason.capsicum.syscall 277 278 #if defined(WANT_LWPINFO32) || (defined(_KERNEL) && defined(LP64)) 279 struct siginfo32 { 280 int si_signo; **/* signal number */** 281 int si_errno; **/* errno association */** 282 int si_code; **/* signal code */** 283 __pid_t si_pid; **/* sending process */** 284 __uid_t si_uid; **/* sender's ruid */** 285 int si_status; **/* exit value */** 286 uint32_t si_addr; **/* faulting instruction */** 287 union sigval32 si_value; **/* signal value */** 288 union { 289 struct { 290 int trapno;**/* machine specific trap code */** 291 } fault; 292 struct { 293 int timerid; 294 int overrun; 295 } timer; 296 struct { 297 int mqd; 298 } mesgq; 299 struct { 300 int32_t band; **/* band event for SIGPOLL */** 301 } poll; **/* was this ever used ? */** 302 struct { 303 int32_t spare1; 304 int spare2[7]; 305 } spare; 306 } reason; 307 }; 308 #endif 309 310 **/ sicode /** 311 **/* codes for SIGILL */** 312 #define ILL_ILLOPC 1 **/* Illegal opcode. */** 313 #define ILL_ILLOPN 2 **/* Illegal operand. */** 314 #define ILL_ILLADR 3 **/* Illegal addressing mode. /_* 315 #define ILL_ILLTRP 4 /* Illegal trap. */ 316 #define ILL_PRVOPC 5 /* Privileged opcode. */ 317 #define ILL_PRVREG 6 /* Privileged register. */ 318 #define ILL_COPROC 7 /* Coprocessor error. */ 319 #define ILL_BADSTK 8 /* Internal stack error. */ 320 321 /* codes for SIGBUS */ 322 #define BUS_ADRALN 1 /* Invalid address alignment. */ 323 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 324 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 325 #define BUS_OOMERR 100 /* Non-standard: No memory. */ 326 327 /* codes for SIGSEGV */ 328 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 329 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 330 /* object. */ 331 #define SEGV_PKUERR 100 /* x86: PKU violation */ 332 333 /* codes for SIGFPE */ 334 #define FPE_INTOVF 1 /* Integer overflow. */ 335 #define FPE_INTDIV 2 /* Integer divide by zero. */ 336 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 337 #define FPE_FLTOVF 4 /* Floating point overflow. */ 338 #define FPE_FLTUND 5 /* Floating point underflow. */ 339 #define FPE_FLTRES 6 /* Floating point inexact result. */ 340 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 341 #define FPE_FLTSUB 8 /* Subscript out of range. */ 342 #define FPE_FLTIDO 9 /* Input denormal operation */ 343 344 /* codes for SIGTRAP */ 345 #define TRAP_BRKPT 1 /* Process breakpoint. */ 346 #define TRAP_TRACE 2 /* Process trace trap. */ 347 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 348 #define TRAP_CAP 4 /* Capabilities protective trap. */ 349 350 /* codes for SIGCHLD */ 351 #define CLD_EXITED 1 /* Child has exited */ 352 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 353 /* did not create a core file */ 354 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 355 /* created a core file */ 356 #define CLD_TRAPPED 4 /* Traced child has trapped */ 357 #define CLD_STOPPED 5 /* Child has stopped */ 358 #define CLD_CONTINUED 6 /* Stopped child has continued */ 359 360 /* codes for SIGPOLL */ 361 #define POLL_IN 1 /* Data input available */ 362 #define POLL_OUT 2 /* Output buffers available */ 363 #define POLL_MSG 3 /* Input message available */ 364 #define POLL_ERR 4 /* I/O Error */ 365 #define POLL_PRI 5 /* High priority input available */ 366 #define POLL_HUP 6 /* Device disconnected */ 367 368 #endif 369 370 #if __POSIX_VISIBLE || __XSI_VISIBLE 371 struct __siginfo; 372 373 /* 374 _ Signal vector "template" used in sigaction call._* 375 */ 376 struct sigaction { 377 union { 378 void (__sa_handler)(int); 379 void (_sa_sigaction)(int, struct __siginfo *, void *); 380 } _sigaction_u; **/* signal handler /_* 381 int sa_flags; **/* see signal options below /_* 382 sigset_t sa_mask; /* signal mask to apply */ 383 }; 384 385 #define sa_handler _sigaction_u._sa_handler 386 #endif 387 388 #if __XSI_VISIBLE 389 **/* If SASIGINFO is set, sasigaction must be used instead of sahandler. /_* 390 #define sa_sigaction _sigaction_u._sa_sigaction 391 #endif 392 393 #if __POSIX_VISIBLE || __XSI_VISIBLE 394 #define SA_NOCLDSTOP 0x0008 **/* do not generate SIGCHLD on child stop /_* 395 #endif **/* POSIXVISIBLE || XSIVISIBLE */** 396 397 #if __XSI_VISIBLE 398 #define SA_ONSTACK 0x0001 **/* take signal on signal stack /_* 399 #define SA_RESTART 0x0002 **/* restart system call on signal return /_* 400 #define SA_RESETHAND 0x0004 /* reset to SIGDFL when taking signal */ 401 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 402 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 403 #define SA_SIGINFO 0x0040 /* signal handler with SASIGINFO args */ 404 #endif 405 406 #if __BSD_VISIBLE 407 #define NSIG 32 /* number of old signals (counting 0) */ 408 #endif 409 410 #if __POSIX_VISIBLE || __XSI_VISIBLE 411 #define SI_NOINFO 0 /* No signal info besides sisigno. */ 412 #define SI_USER 0x10001 /* Signal sent by kill(). */ 413 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 414 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 415 /* a timer set by timersettime(). */ 416 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 417 /* an asynchronous I/O request.*/ 418 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 419 /* message on an empty message queue. */ 420 #define SI_KERNEL 0x10006 421 #define SI_LWP 0x10007 /* Signal sent by thrkill */ 422 #endif 423 #if __BSD_VISIBLE 424 #define SI_UNDEFINED 0 425 #endif 426 427 #if __BSD_VISIBLE 428 typedef __sighandler_t sig_t; /* type of pointer to a signal function */ 429 typedef void __siginfohandler_t(int, struct __siginfo , void ); 430 #endif 431 432 #if __XSI_VISIBLE 433 #if __BSD_VISIBLE 434 #define __stack_t sigaltstack 435 #endif 436 typedef struct __stack_t stack_t; 437 438 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 439 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 440 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */ 441 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 442 #endif 443 444 **_/_ 445 _ Structure used in sigaltstack call. Its definition is always_ 446 _ needed for _ucontext. If BSDVISIBLE is defined, the structure 447 _ tag is actually sigaltstack._* 448 */ 449 struct __stack_t { 450 void ss_sp; /* signal stack base */ 451 __size_t ss_size; /* signal stack length */ 452 int ss_flags; /* SSDISABLE and/or SSONSTACK */ 453 }; 454 455 #if __BSD_VISIBLE 456 **_/_ 457 _ 4.3 compatibility:_* 458 _ Signal vector "template" used in sigvec call._* 459 */ 460 struct sigvec { 461 __sighandler_t sv_handler; /* signal handler */ 462 int sv_mask; /* signal mask to apply */ 463 int sv_flags; /* see signal options below */ 464 }; 465 466 #define SV_ONSTACK SA_ONSTACK 467 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 468 #define SV_RESETHAND SA_RESETHAND 469 #define SV_NODEFER SA_NODEFER 470 #define SV_NOCLDSTOP SA_NOCLDSTOP 471 #define SV_SIGINFO SA_SIGINFO 472 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 473 #endif 474 475 /* Keep this in one place only */ 476 #if defined(_KERNEL) && defined(COMPAT_43) &&
477 !defined(i386) 478 struct osigcontext { 479 int not_used; 480 }; 481 #endif 482 483 #if __XSI_VISIBLE 484 **/_ 485 _ Structure used in sigstack call._* 486 */ 487 struct sigstack { 488 void ss_sp; /* signal stack pointer */ 489 int ss_onstack; /* current status */ 490 }; 491 #endif 492 493 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 494 **_/*_** 495 **_* Macro for converting signal number to a mask suitable for_** 496 **_* sigblock().** 497 */ 498 #define sigmask(m) (1 << ((m)-1)) 499 #endif 500 501 #if __BSD_VISIBLE 502 #define BADSIG SIG_ERR 503 #endif 504 505 #if __POSIX_VISIBLE || __XSI_VISIBLE 506 **_/*_** 507 **_* Flags for sigprocmask:_** 508 **_*/_** 509 #define SIG_BLOCK 1 **_/* block specified signal set */_** 510 #define SIG_UNBLOCK 2 **_/* unblock specified signal set */_** 511 #define SIG_SETMASK 3 **_/* set specified signal set */_** 512 #endif 513 514 **_/*_** 515 **_* For historical reasons; programs expect signal's return value to be_** 516 **_* defined by <sys/signal.h>.* 517 */ 518 __BEGIN_DECLS 519 __sighandler_t *signal(int, __sighandler_t *); 520 __END_DECLS 521 522 #endif /* !SYSSIGNALH */

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