1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * 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 37 #ifndef _SYS_SIGNAL_H_ 38 #define _SYS_SIGNAL_H_ 39 40 #include <sys/cdefs.h> 41 #include <sys/_types.h> 42 #include <sys/_sigset.h> 43 #include <sys/_sigaltstack.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 int _syscall; /* Syscall number for signals 258 * delivered as a result of 259 * system calls denied by 260 * Capsicum. */ 261 } _capsicum; 262 struct { 263 long __spare1__; 264 int __spare2__[7]; 265 } __spare__; 266 } _reason; 267 } siginfo_t; 268 269 #define si_trapno _reason._fault._trapno 270 #define si_timerid _reason._timer._timerid 271 #define si_overrun _reason._timer._overrun 272 #define si_mqd _reason._mesgq._mqd 273 #define si_band _reason._poll._band 274 #define si_syscall _reason._capsicum._syscall 275 276 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 277 struct __siginfo32 { 278 int si_signo; /* signal number */ 279 int si_errno; /* errno association */ 280 int si_code; /* signal code */ 281 __pid_t si_pid; /* sending process */ 282 __uid_t si_uid; /* sender's ruid */ 283 int si_status; /* exit value */ 284 uint32_t si_addr; /* faulting instruction */ 285 union sigval32 si_value; /* signal value */ 286 union { 287 struct { 288 int _trapno;/* machine specific trap code */ 289 } _fault; 290 struct { 291 int _timerid; 292 int _overrun; 293 } _timer; 294 struct { 295 int _mqd; 296 } _mesgq; 297 struct { 298 int32_t _band; /* band event for SIGPOLL */ 299 } _poll; /* was this ever used ? */ 300 struct { 301 int32_t __spare1__; 302 int __spare2__[7]; 303 } __spare__; 304 } _reason; 305 }; 306 #endif 307 308 /** si_code **/ 309 /* codes for SIGILL */ 310 #define ILL_ILLOPC 1 /* Illegal opcode. */ 311 #define ILL_ILLOPN 2 /* Illegal operand. */ 312 #define ILL_ILLADR 3 /* Illegal addressing mode. */ 313 #define ILL_ILLTRP 4 /* Illegal trap. */ 314 #define ILL_PRVOPC 5 /* Privileged opcode. */ 315 #define ILL_PRVREG 6 /* Privileged register. */ 316 #define ILL_COPROC 7 /* Coprocessor error. */ 317 #define ILL_BADSTK 8 /* Internal stack error. */ 318 319 /* codes for SIGBUS */ 320 #define BUS_ADRALN 1 /* Invalid address alignment. */ 321 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 322 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 323 #define BUS_OOMERR 100 /* Non-standard: No memory. */ 324 325 /* codes for SIGSEGV */ 326 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 327 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 328 /* object. */ 329 #define SEGV_PKUERR 100 /* x86: PKU violation */ 330 331 /* codes for SIGFPE */ 332 #define FPE_INTOVF 1 /* Integer overflow. */ 333 #define FPE_INTDIV 2 /* Integer divide by zero. */ 334 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 335 #define FPE_FLTOVF 4 /* Floating point overflow. */ 336 #define FPE_FLTUND 5 /* Floating point underflow. */ 337 #define FPE_FLTRES 6 /* Floating point inexact result. */ 338 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 339 #define FPE_FLTSUB 8 /* Subscript out of range. */ 340 #define FPE_FLTIDO 9 /* Input denormal operation */ 341 342 /* codes for SIGTRAP */ 343 #define TRAP_BRKPT 1 /* Process breakpoint. */ 344 #define TRAP_TRACE 2 /* Process trace trap. */ 345 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 346 #define TRAP_CAP 4 /* Capabilities protective trap. */ 347 348 /* codes for SIGCHLD */ 349 #define CLD_EXITED 1 /* Child has exited */ 350 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 351 /* did not create a core file */ 352 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 353 /* created a core file */ 354 #define CLD_TRAPPED 4 /* Traced child has trapped */ 355 #define CLD_STOPPED 5 /* Child has stopped */ 356 #define CLD_CONTINUED 6 /* Stopped child has continued */ 357 358 /* codes for SIGPOLL */ 359 #define POLL_IN 1 /* Data input available */ 360 #define POLL_OUT 2 /* Output buffers available */ 361 #define POLL_MSG 3 /* Input message available */ 362 #define POLL_ERR 4 /* I/O Error */ 363 #define POLL_PRI 5 /* High priority input available */ 364 #define POLL_HUP 6 /* Device disconnected */ 365 366 #endif 367 368 #if __POSIX_VISIBLE || __XSI_VISIBLE 369 struct __siginfo; 370 371 /* 372 * Signal vector "template" used in sigaction call. 373 */ 374 struct sigaction { 375 union { 376 void (*__sa_handler)(int); 377 void (*__sa_sigaction)(int, struct __siginfo *, void *); 378 } __sigaction_u; /* signal handler */ 379 int sa_flags; /* see signal options below */ 380 sigset_t sa_mask; /* signal mask to apply */ 381 }; 382 383 #define sa_handler __sigaction_u.__sa_handler 384 #endif 385 386 #if __XSI_VISIBLE 387 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */ 388 #define sa_sigaction __sigaction_u.__sa_sigaction 389 #endif 390 391 #if __POSIX_VISIBLE || __XSI_VISIBLE 392 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 393 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 394 395 #if __XSI_VISIBLE 396 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 397 #define SA_RESTART 0x0002 /* restart system call on signal return */ 398 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 399 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 400 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 401 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 402 #endif 403 404 #if __BSD_VISIBLE 405 #define NSIG 32 /* number of old signals (counting 0) */ 406 #endif 407 408 #if __POSIX_VISIBLE || __XSI_VISIBLE 409 #define SI_NOINFO 0 /* No signal info besides si_signo. */ 410 #define SI_USER 0x10001 /* Signal sent by kill(). */ 411 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 412 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 413 /* a timer set by timer_settime(). */ 414 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 415 /* an asynchronous I/O request.*/ 416 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 417 /* message on an empty message queue. */ 418 #define SI_KERNEL 0x10006 419 #define SI_LWP 0x10007 /* Signal sent by thr_kill */ 420 #endif 421 #if __BSD_VISIBLE 422 #define SI_UNDEFINED 0 423 #endif 424 425 #if __BSD_VISIBLE 426 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 427 typedef void __siginfohandler_t(int, struct __siginfo *, void *); 428 #endif 429 430 #if __BSD_VISIBLE 431 /* 432 * 4.3 compatibility: 433 * Signal vector "template" used in sigvec call. 434 */ 435 struct sigvec { 436 __sighandler_t *sv_handler; /* signal handler */ 437 int sv_mask; /* signal mask to apply */ 438 int sv_flags; /* see signal options below */ 439 }; 440 441 #define SV_ONSTACK SA_ONSTACK 442 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 443 #define SV_RESETHAND SA_RESETHAND 444 #define SV_NODEFER SA_NODEFER 445 #define SV_NOCLDSTOP SA_NOCLDSTOP 446 #define SV_SIGINFO SA_SIGINFO 447 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 448 #endif 449 450 /* Keep this in one place only */ 451 #if defined(_KERNEL) && defined(COMPAT_43) && \ 452 !defined(__i386__) 453 struct osigcontext { 454 int _not_used; 455 }; 456 #endif 457 458 #if __XSI_VISIBLE 459 /* 460 * Structure used in sigstack call. 461 */ 462 struct sigstack { 463 void *ss_sp; /* signal stack pointer */ 464 int ss_onstack; /* current status */ 465 }; 466 #endif 467 468 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 469 /* 470 * Macro for converting signal number to a mask suitable for 471 * sigblock(). 472 */ 473 #define sigmask(m) (1 << ((m)-1)) 474 #endif 475 476 #if __BSD_VISIBLE 477 #define BADSIG SIG_ERR 478 #endif 479 480 #if __POSIX_VISIBLE || __XSI_VISIBLE 481 /* 482 * Flags for sigprocmask: 483 */ 484 #define SIG_BLOCK 1 /* block specified signal set */ 485 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 486 #define SIG_SETMASK 3 /* set specified signal set */ 487 #endif 488 489 /* 490 * For historical reasons; programs expect signal's return value to be 491 * defined by <sys/signal.h>. 492 */ 493 __BEGIN_DECLS 494 __sighandler_t *signal(int, __sighandler_t *); 495 __END_DECLS 496 497 #endif /* !_SYS_SIGNAL_H_ */ 498