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 44 #include <machine/_limits.h> /* __MINSIGSTKSZ */ 45 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 46 47 #if __POSIX_VISIBLE >= 200809 48 49 #include <sys/_pthreadtypes.h> 50 #include <sys/_timespec.h> 51 52 #ifndef _SIZE_T_DECLARED 53 typedef __size_t size_t; 54 #define _SIZE_T_DECLARED 55 #endif 56 57 #ifndef _UID_T_DECLARED 58 typedef __uid_t uid_t; 59 #define _UID_T_DECLARED 60 #endif 61 62 #endif /* __POSIX_VISIBLE >= 200809 */ 63 64 /* 65 * System defined signals. 66 */ 67 #if __POSIX_VISIBLE || __XSI_VISIBLE 68 #define SIGHUP 1 /* hangup */ 69 #endif 70 #define SIGINT 2 /* interrupt */ 71 #if __POSIX_VISIBLE || __XSI_VISIBLE 72 #define SIGQUIT 3 /* quit */ 73 #endif 74 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 75 #if __XSI_VISIBLE 76 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 77 #endif 78 #define SIGABRT 6 /* abort() */ 79 #if __BSD_VISIBLE 80 #define SIGIOT SIGABRT /* compatibility */ 81 #define SIGEMT 7 /* EMT instruction */ 82 #endif 83 #define SIGFPE 8 /* floating point exception */ 84 #if __POSIX_VISIBLE || __XSI_VISIBLE 85 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 86 #endif 87 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 88 #define SIGBUS 10 /* bus error */ 89 #endif 90 #define SIGSEGV 11 /* segmentation violation */ 91 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 92 #define SIGSYS 12 /* non-existent system call invoked */ 93 #endif 94 #if __POSIX_VISIBLE || __XSI_VISIBLE 95 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 96 #define SIGALRM 14 /* alarm clock */ 97 #endif 98 #define SIGTERM 15 /* software termination signal from kill */ 99 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 100 #define SIGURG 16 /* urgent condition on IO channel */ 101 #endif 102 #if __POSIX_VISIBLE || __XSI_VISIBLE 103 #define SIGSTOP 17 /* sendable stop signal not from tty */ 104 #define SIGTSTP 18 /* stop signal from tty */ 105 #define SIGCONT 19 /* continue a stopped process */ 106 #define SIGCHLD 20 /* to parent on child stop or exit */ 107 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 108 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 109 #endif 110 #if __BSD_VISIBLE 111 #define SIGIO 23 /* input/output possible signal */ 112 #endif 113 #if __XSI_VISIBLE 114 #define SIGXCPU 24 /* exceeded CPU time limit */ 115 #define SIGXFSZ 25 /* exceeded file size limit */ 116 #define SIGVTALRM 26 /* virtual time alarm */ 117 #define SIGPROF 27 /* profiling time alarm */ 118 #endif 119 #if __BSD_VISIBLE 120 #define SIGWINCH 28 /* window size changes */ 121 #define SIGINFO 29 /* information request */ 122 #endif 123 #if __POSIX_VISIBLE || __XSI_VISIBLE 124 #define SIGUSR1 30 /* user defined signal 1 */ 125 #define SIGUSR2 31 /* user defined signal 2 */ 126 #endif 127 #if __BSD_VISIBLE 128 #define SIGTHR 32 /* reserved by thread library. */ 129 #define SIGLWP SIGTHR 130 #define SIGLIBRT 33 /* reserved by real-time library. */ 131 #endif 132 133 #define SIGRTMIN 65 134 #define SIGRTMAX 126 135 136 #define SIG_DFL ((__sighandler_t *)0) 137 #define SIG_IGN ((__sighandler_t *)1) 138 #define SIG_ERR ((__sighandler_t *)-1) 139 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */ 140 #define SIG_HOLD ((__sighandler_t *)3) 141 142 /* 143 * Type of a signal handling function. 144 * 145 * Language spec sez signal handlers take exactly one arg, even though we 146 * actually supply three. Ugh! 147 * 148 * We don't try to hide the difference by leaving out the args because 149 * that would cause warnings about conformant programs. Nonconformant 150 * programs can avoid the warnings by casting to (__sighandler_t *) or 151 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 152 * 153 * The kernel should reverse the cast before calling the function. It 154 * has no way to do this, but on most machines 1-arg and 3-arg functions 155 * have the same calling protocol so there is no problem in practice. 156 * A bit in sa_flags could be used to specify the number of args. 157 */ 158 typedef void __sighandler_t(int); 159 160 #if __POSIX_VISIBLE || __XSI_VISIBLE 161 #ifndef _SIGSET_T_DECLARED 162 #define _SIGSET_T_DECLARED 163 typedef __sigset_t sigset_t; 164 #endif 165 #endif 166 167 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE >= 500 168 union sigval { 169 /* Members as suggested by Annex C of POSIX 1003.1b. */ 170 int sival_int; 171 void *sival_ptr; 172 /* 6.0 compatibility */ 173 int sigval_int; 174 void *sigval_ptr; 175 }; 176 177 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 178 union sigval32 { 179 int sival_int; 180 uint32_t sival_ptr; 181 /* 6.0 compatibility */ 182 int sigval_int; 183 uint32_t sigval_ptr; 184 }; 185 #endif 186 #endif 187 188 #if __POSIX_VISIBLE >= 199309 189 190 struct pthread_attr; 191 192 struct sigevent { 193 int sigev_notify; /* Notification type */ 194 int sigev_signo; /* Signal number */ 195 union sigval sigev_value; /* Signal value */ 196 union { 197 __lwpid_t _threadid; 198 struct { 199 void (*_function)(union sigval); 200 struct pthread_attr **_attribute; 201 } _sigev_thread; 202 unsigned short _kevent_flags; 203 long __spare__[8]; 204 } _sigev_un; 205 }; 206 207 #if __BSD_VISIBLE 208 #define sigev_notify_kqueue sigev_signo 209 #define sigev_notify_kevent_flags _sigev_un._kevent_flags 210 #define sigev_notify_thread_id _sigev_un._threadid 211 #endif 212 #define sigev_notify_function _sigev_un._sigev_thread._function 213 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 214 215 #define SIGEV_NONE 0 /* No async notification. */ 216 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */ 217 #define SIGEV_THREAD 2 /* Call back from another pthread. */ 218 #if __BSD_VISIBLE 219 #define SIGEV_KEVENT 3 /* Generate a kevent. */ 220 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */ 221 #endif 222 223 #endif /* __POSIX_VISIBLE >= 199309 */ 224 225 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 226 typedef struct __siginfo { 227 int si_signo; /* signal number */ 228 int si_errno; /* errno association */ 229 /* 230 * Cause of signal, one of the SI_ macros or signal-specific 231 * values, i.e. one of the FPE_... values for SIGFPE. This 232 * value is equivalent to the second argument to an old-style 233 * FreeBSD signal handler. 234 */ 235 int si_code; /* signal code */ 236 __pid_t si_pid; /* sending process */ 237 __uid_t si_uid; /* sender's ruid */ 238 int si_status; /* exit value */ 239 void *si_addr; /* faulting instruction */ 240 union sigval si_value; /* signal value */ 241 union { 242 struct { 243 int _trapno;/* machine specific trap code */ 244 } _fault; 245 struct { 246 int _timerid; 247 int _overrun; 248 } _timer; 249 struct { 250 int _mqd; 251 } _mesgq; 252 struct { 253 long _band; /* band event for SIGPOLL */ 254 } _poll; /* was this ever used ? */ 255 struct { 256 int _syscall; /* Syscall number for signals 257 * delivered as a result of 258 * system calls denied by 259 * Capsicum. */ 260 } _capsicum; 261 struct { 262 long __spare1__; 263 int __spare2__[7]; 264 } __spare__; 265 } _reason; 266 } siginfo_t; 267 268 #define si_trapno _reason._fault._trapno 269 #define si_timerid _reason._timer._timerid 270 #define si_overrun _reason._timer._overrun 271 #define si_mqd _reason._mesgq._mqd 272 #define si_band _reason._poll._band 273 #define si_syscall _reason._capsicum._syscall 274 275 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 276 struct siginfo32 { 277 int si_signo; /* signal number */ 278 int si_errno; /* errno association */ 279 int si_code; /* signal code */ 280 __pid_t si_pid; /* sending process */ 281 __uid_t si_uid; /* sender's ruid */ 282 int si_status; /* exit value */ 283 uint32_t si_addr; /* faulting instruction */ 284 union sigval32 si_value; /* signal value */ 285 union { 286 struct { 287 int _trapno;/* machine specific trap code */ 288 } _fault; 289 struct { 290 int _timerid; 291 int _overrun; 292 } _timer; 293 struct { 294 int _mqd; 295 } _mesgq; 296 struct { 297 int32_t _band; /* band event for SIGPOLL */ 298 } _poll; /* was this ever used ? */ 299 struct { 300 int32_t __spare1__; 301 int __spare2__[7]; 302 } __spare__; 303 } _reason; 304 }; 305 #endif 306 307 /** si_code **/ 308 /* codes for SIGILL */ 309 #define ILL_ILLOPC 1 /* Illegal opcode. */ 310 #define ILL_ILLOPN 2 /* Illegal operand. */ 311 #define ILL_ILLADR 3 /* Illegal addressing mode. */ 312 #define ILL_ILLTRP 4 /* Illegal trap. */ 313 #define ILL_PRVOPC 5 /* Privileged opcode. */ 314 #define ILL_PRVREG 6 /* Privileged register. */ 315 #define ILL_COPROC 7 /* Coprocessor error. */ 316 #define ILL_BADSTK 8 /* Internal stack error. */ 317 318 /* codes for SIGBUS */ 319 #define BUS_ADRALN 1 /* Invalid address alignment. */ 320 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 321 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 322 #define BUS_OOMERR 100 /* Non-standard: No memory. */ 323 324 /* codes for SIGSEGV */ 325 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 326 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 327 /* object. */ 328 #define SEGV_PKUERR 100 /* x86: PKU violation */ 329 330 /* codes for SIGFPE */ 331 #define FPE_INTOVF 1 /* Integer overflow. */ 332 #define FPE_INTDIV 2 /* Integer divide by zero. */ 333 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 334 #define FPE_FLTOVF 4 /* Floating point overflow. */ 335 #define FPE_FLTUND 5 /* Floating point underflow. */ 336 #define FPE_FLTRES 6 /* Floating point inexact result. */ 337 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 338 #define FPE_FLTSUB 8 /* Subscript out of range. */ 339 #define FPE_FLTIDO 9 /* Input denormal operation */ 340 341 /* codes for SIGTRAP */ 342 #define TRAP_BRKPT 1 /* Process breakpoint. */ 343 #define TRAP_TRACE 2 /* Process trace trap. */ 344 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 345 #define TRAP_CAP 4 /* Capabilities protective trap. */ 346 347 /* codes for SIGCHLD */ 348 #define CLD_EXITED 1 /* Child has exited */ 349 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 350 /* did not create a core file */ 351 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 352 /* created a core file */ 353 #define CLD_TRAPPED 4 /* Traced child has trapped */ 354 #define CLD_STOPPED 5 /* Child has stopped */ 355 #define CLD_CONTINUED 6 /* Stopped child has continued */ 356 357 /* codes for SIGPOLL */ 358 #define POLL_IN 1 /* Data input available */ 359 #define POLL_OUT 2 /* Output buffers available */ 360 #define POLL_MSG 3 /* Input message available */ 361 #define POLL_ERR 4 /* I/O Error */ 362 #define POLL_PRI 5 /* High priority input available */ 363 #define POLL_HUP 6 /* Device disconnected */ 364 365 #endif 366 367 #if __POSIX_VISIBLE || __XSI_VISIBLE 368 struct __siginfo; 369 370 /* 371 * Signal vector "template" used in sigaction call. 372 */ 373 struct sigaction { 374 union { 375 void (*__sa_handler)(int); 376 void (*__sa_sigaction)(int, struct __siginfo *, void *); 377 } __sigaction_u; /* signal handler */ 378 int sa_flags; /* see signal options below */ 379 sigset_t sa_mask; /* signal mask to apply */ 380 }; 381 382 #define sa_handler __sigaction_u.__sa_handler 383 #endif 384 385 #if __XSI_VISIBLE 386 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */ 387 #define sa_sigaction __sigaction_u.__sa_sigaction 388 #endif 389 390 #if __POSIX_VISIBLE || __XSI_VISIBLE 391 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 392 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 393 394 #if __XSI_VISIBLE 395 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 396 #define SA_RESTART 0x0002 /* restart system call on signal return */ 397 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 398 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 399 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 400 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 401 #endif 402 403 #if __BSD_VISIBLE 404 #define NSIG 32 /* number of old signals (counting 0) */ 405 #endif 406 407 #if __POSIX_VISIBLE || __XSI_VISIBLE 408 #define SI_NOINFO 0 /* No signal info besides si_signo. */ 409 #define SI_USER 0x10001 /* Signal sent by kill(). */ 410 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 411 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 412 /* a timer set by timer_settime(). */ 413 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 414 /* an asynchronous I/O request.*/ 415 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 416 /* message on an empty message queue. */ 417 #define SI_KERNEL 0x10006 418 #define SI_LWP 0x10007 /* Signal sent by thr_kill */ 419 #endif 420 #if __BSD_VISIBLE 421 #define SI_UNDEFINED 0 422 #endif 423 424 #if __BSD_VISIBLE 425 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 426 typedef void __siginfohandler_t(int, struct __siginfo *, void *); 427 #endif 428 429 #if __XSI_VISIBLE 430 #if __BSD_VISIBLE 431 #define __stack_t sigaltstack 432 #endif 433 typedef struct __stack_t stack_t; 434 435 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 436 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 437 #define MINSIGSTKSZ __MINSIGSTKSZ /* minimum stack size */ 438 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 439 #endif 440 441 /* 442 * Structure used in sigaltstack call. Its definition is always 443 * needed for __ucontext. If __BSD_VISIBLE is defined, the structure 444 * tag is actually sigaltstack. 445 */ 446 struct __stack_t { 447 void *ss_sp; /* signal stack base */ 448 __size_t ss_size; /* signal stack length */ 449 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 450 }; 451 452 #if __BSD_VISIBLE 453 /* 454 * 4.3 compatibility: 455 * Signal vector "template" used in sigvec call. 456 */ 457 struct sigvec { 458 __sighandler_t *sv_handler; /* signal handler */ 459 int sv_mask; /* signal mask to apply */ 460 int sv_flags; /* see signal options below */ 461 }; 462 463 #define SV_ONSTACK SA_ONSTACK 464 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 465 #define SV_RESETHAND SA_RESETHAND 466 #define SV_NODEFER SA_NODEFER 467 #define SV_NOCLDSTOP SA_NOCLDSTOP 468 #define SV_SIGINFO SA_SIGINFO 469 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 470 #endif 471 472 /* Keep this in one place only */ 473 #if defined(_KERNEL) && defined(COMPAT_43) && \ 474 !defined(__i386__) 475 struct osigcontext { 476 int _not_used; 477 }; 478 #endif 479 480 #if __XSI_VISIBLE 481 /* 482 * Structure used in sigstack call. 483 */ 484 struct sigstack { 485 void *ss_sp; /* signal stack pointer */ 486 int ss_onstack; /* current status */ 487 }; 488 #endif 489 490 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 491 /* 492 * Macro for converting signal number to a mask suitable for 493 * sigblock(). 494 */ 495 #define sigmask(m) (1 << ((m)-1)) 496 #endif 497 498 #if __BSD_VISIBLE 499 #define BADSIG SIG_ERR 500 #endif 501 502 #if __POSIX_VISIBLE || __XSI_VISIBLE 503 /* 504 * Flags for sigprocmask: 505 */ 506 #define SIG_BLOCK 1 /* block specified signal set */ 507 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 508 #define SIG_SETMASK 3 /* set specified signal set */ 509 #endif 510 511 /* 512 * For historical reasons; programs expect signal's return value to be 513 * defined by <sys/signal.h>. 514 */ 515 __BEGIN_DECLS 516 __sighandler_t *signal(int, __sighandler_t *); 517 __END_DECLS 518 519 #endif /* !_SYS_SIGNAL_H_ */ 520