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 #include <sys/_sigval.h> 45 46 #include <machine/_limits.h> /* __MINSIGSTKSZ */ 47 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 48 49 #if __POSIX_VISIBLE >= 200809 50 51 #include <sys/_pthreadtypes.h> 52 #include <sys/_timespec.h> 53 54 #ifndef _SIZE_T_DECLARED 55 typedef __size_t size_t; 56 #define _SIZE_T_DECLARED 57 #endif 58 59 #ifndef _UID_T_DECLARED 60 typedef __uid_t uid_t; 61 #define _UID_T_DECLARED 62 #endif 63 64 #endif /* __POSIX_VISIBLE >= 200809 */ 65 66 /* 67 * System defined signals. 68 */ 69 #if __POSIX_VISIBLE || __XSI_VISIBLE 70 #define SIGHUP 1 /* hangup */ 71 #endif 72 #define SIGINT 2 /* interrupt */ 73 #if __POSIX_VISIBLE || __XSI_VISIBLE 74 #define SIGQUIT 3 /* quit */ 75 #endif 76 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 77 #if __XSI_VISIBLE 78 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 79 #endif 80 #define SIGABRT 6 /* abort() */ 81 #if __BSD_VISIBLE 82 #define SIGIOT SIGABRT /* compatibility */ 83 #define SIGEMT 7 /* EMT instruction */ 84 #endif 85 #define SIGFPE 8 /* floating point exception */ 86 #if __POSIX_VISIBLE || __XSI_VISIBLE 87 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 88 #endif 89 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 90 #define SIGBUS 10 /* bus error */ 91 #endif 92 #define SIGSEGV 11 /* segmentation violation */ 93 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 94 #define SIGSYS 12 /* non-existent system call invoked */ 95 #endif 96 #if __POSIX_VISIBLE || __XSI_VISIBLE 97 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 98 #define SIGALRM 14 /* alarm clock */ 99 #endif 100 #define SIGTERM 15 /* software termination signal from kill */ 101 #if __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE 102 #define SIGURG 16 /* urgent condition on IO channel */ 103 #endif 104 #if __POSIX_VISIBLE || __XSI_VISIBLE 105 #define SIGSTOP 17 /* sendable stop signal not from tty */ 106 #define SIGTSTP 18 /* stop signal from tty */ 107 #define SIGCONT 19 /* continue a stopped process */ 108 #define SIGCHLD 20 /* to parent on child stop or exit */ 109 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 110 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 111 #endif 112 #if __BSD_VISIBLE 113 #define SIGIO 23 /* input/output possible signal */ 114 #endif 115 #if __XSI_VISIBLE 116 #define SIGXCPU 24 /* exceeded CPU time limit */ 117 #define SIGXFSZ 25 /* exceeded file size limit */ 118 #define SIGVTALRM 26 /* virtual time alarm */ 119 #define SIGPROF 27 /* profiling time alarm */ 120 #endif 121 #if __BSD_VISIBLE 122 #define SIGWINCH 28 /* window size changes */ 123 #define SIGINFO 29 /* information request */ 124 #endif 125 #if __POSIX_VISIBLE || __XSI_VISIBLE 126 #define SIGUSR1 30 /* user defined signal 1 */ 127 #define SIGUSR2 31 /* user defined signal 2 */ 128 #endif 129 #if __BSD_VISIBLE 130 #define SIGTHR 32 /* reserved by thread library. */ 131 #define SIGLWP SIGTHR 132 #define SIGLIBRT 33 /* reserved by real-time library. */ 133 #endif 134 135 #define SIGRTMIN 65 136 #define SIGRTMAX 126 137 138 #define SIG_DFL ((__sighandler_t *)0) 139 #define SIG_IGN ((__sighandler_t *)1) 140 #define SIG_ERR ((__sighandler_t *)-1) 141 /* #define SIG_CATCH ((__sighandler_t *)2) See signalvar.h */ 142 #define SIG_HOLD ((__sighandler_t *)3) 143 144 /* 145 * Type of a signal handling function. 146 * 147 * Language spec sez signal handlers take exactly one arg, even though we 148 * actually supply three. Ugh! 149 * 150 * We don't try to hide the difference by leaving out the args because 151 * that would cause warnings about conformant programs. Nonconformant 152 * programs can avoid the warnings by casting to (__sighandler_t *) or 153 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 154 * 155 * The kernel should reverse the cast before calling the function. It 156 * has no way to do this, but on most machines 1-arg and 3-arg functions 157 * have the same calling protocol so there is no problem in practice. 158 * A bit in sa_flags could be used to specify the number of args. 159 */ 160 typedef void __sighandler_t(int); 161 162 #if __POSIX_VISIBLE || __XSI_VISIBLE 163 #ifndef _SIGSET_T_DECLARED 164 #define _SIGSET_T_DECLARED 165 typedef __sigset_t sigset_t; 166 #endif 167 #endif 168 169 #if __POSIX_VISIBLE >= 199309 170 171 struct pthread_attr; 172 173 struct sigevent { 174 int sigev_notify; /* Notification type */ 175 int sigev_signo; /* Signal number */ 176 union sigval sigev_value; /* Signal value */ 177 union { 178 __lwpid_t _threadid; 179 struct { 180 void (*_function)(union sigval); 181 struct pthread_attr **_attribute; 182 } _sigev_thread; 183 unsigned short _kevent_flags; 184 long __spare__[8]; 185 } _sigev_un; 186 }; 187 188 #if __BSD_VISIBLE 189 #define sigev_notify_kqueue sigev_signo 190 #define sigev_notify_kevent_flags _sigev_un._kevent_flags 191 #define sigev_notify_thread_id _sigev_un._threadid 192 #endif 193 #define sigev_notify_function _sigev_un._sigev_thread._function 194 #define sigev_notify_attributes _sigev_un._sigev_thread._attribute 195 196 #define SIGEV_NONE 0 /* No async notification. */ 197 #define SIGEV_SIGNAL 1 /* Generate a queued signal. */ 198 #define SIGEV_THREAD 2 /* Call back from another pthread. */ 199 #if __BSD_VISIBLE 200 #define SIGEV_KEVENT 3 /* Generate a kevent. */ 201 #define SIGEV_THREAD_ID 4 /* Send signal to a kernel thread. */ 202 #endif 203 204 #endif /* __POSIX_VISIBLE >= 199309 */ 205 206 #if __POSIX_VISIBLE >= 199309 || __XSI_VISIBLE 207 typedef struct __siginfo { 208 int si_signo; /* signal number */ 209 int si_errno; /* errno association */ 210 /* 211 * Cause of signal, one of the SI_ macros or signal-specific 212 * values, i.e. one of the FPE_... values for SIGFPE. This 213 * value is equivalent to the second argument to an old-style 214 * FreeBSD signal handler. 215 */ 216 int si_code; /* signal code */ 217 __pid_t si_pid; /* sending process */ 218 __uid_t si_uid; /* sender's ruid */ 219 int si_status; /* exit value */ 220 void *si_addr; /* faulting instruction */ 221 union sigval si_value; /* signal value */ 222 union { 223 struct { 224 int _trapno;/* machine specific trap code */ 225 } _fault; 226 struct { 227 int _timerid; 228 int _overrun; 229 } _timer; 230 struct { 231 int _mqd; 232 } _mesgq; 233 struct { 234 long _band; /* band event for SIGPOLL */ 235 } _poll; /* was this ever used ? */ 236 struct { 237 int _syscall; /* Syscall number for signals 238 * delivered as a result of 239 * system calls denied by 240 * Capsicum. */ 241 } _capsicum; 242 struct { 243 long __spare1__; 244 int __spare2__[7]; 245 } __spare__; 246 } _reason; 247 } siginfo_t; 248 249 #define si_trapno _reason._fault._trapno 250 #define si_timerid _reason._timer._timerid 251 #define si_overrun _reason._timer._overrun 252 #define si_mqd _reason._mesgq._mqd 253 #define si_band _reason._poll._band 254 #define si_syscall _reason._capsicum._syscall 255 256 #if defined(_WANT_LWPINFO32) || (defined(_KERNEL) && defined(__LP64__)) 257 struct __siginfo32 { 258 int si_signo; /* signal number */ 259 int si_errno; /* errno association */ 260 int si_code; /* signal code */ 261 __pid_t si_pid; /* sending process */ 262 __uid_t si_uid; /* sender's ruid */ 263 int si_status; /* exit value */ 264 uint32_t si_addr; /* faulting instruction */ 265 union sigval32 si_value; /* signal value */ 266 union { 267 struct { 268 int _trapno;/* machine specific trap code */ 269 } _fault; 270 struct { 271 int _timerid; 272 int _overrun; 273 } _timer; 274 struct { 275 int _mqd; 276 } _mesgq; 277 struct { 278 int32_t _band; /* band event for SIGPOLL */ 279 } _poll; /* was this ever used ? */ 280 struct { 281 int32_t __spare1__; 282 int __spare2__[7]; 283 } __spare__; 284 } _reason; 285 }; 286 #endif 287 288 /** si_code **/ 289 /* codes for SIGILL */ 290 #define ILL_ILLOPC 1 /* Illegal opcode. */ 291 #define ILL_ILLOPN 2 /* Illegal operand. */ 292 #define ILL_ILLADR 3 /* Illegal addressing mode. */ 293 #define ILL_ILLTRP 4 /* Illegal trap. */ 294 #define ILL_PRVOPC 5 /* Privileged opcode. */ 295 #define ILL_PRVREG 6 /* Privileged register. */ 296 #define ILL_COPROC 7 /* Coprocessor error. */ 297 #define ILL_BADSTK 8 /* Internal stack error. */ 298 299 /* codes for SIGBUS */ 300 #define BUS_ADRALN 1 /* Invalid address alignment. */ 301 #define BUS_ADRERR 2 /* Nonexistent physical address. */ 302 #define BUS_OBJERR 3 /* Object-specific hardware error. */ 303 #define BUS_OOMERR 100 /* Non-standard: No memory. */ 304 305 /* codes for SIGSEGV */ 306 #define SEGV_MAPERR 1 /* Address not mapped to object. */ 307 #define SEGV_ACCERR 2 /* Invalid permissions for mapped */ 308 /* object. */ 309 #define SEGV_PKUERR 100 /* x86: PKU violation */ 310 311 /* codes for SIGFPE */ 312 #define FPE_INTOVF 1 /* Integer overflow. */ 313 #define FPE_INTDIV 2 /* Integer divide by zero. */ 314 #define FPE_FLTDIV 3 /* Floating point divide by zero. */ 315 #define FPE_FLTOVF 4 /* Floating point overflow. */ 316 #define FPE_FLTUND 5 /* Floating point underflow. */ 317 #define FPE_FLTRES 6 /* Floating point inexact result. */ 318 #define FPE_FLTINV 7 /* Invalid floating point operation. */ 319 #define FPE_FLTSUB 8 /* Subscript out of range. */ 320 #define FPE_FLTIDO 9 /* Input denormal operation */ 321 322 /* codes for SIGTRAP */ 323 #define TRAP_BRKPT 1 /* Process breakpoint. */ 324 #define TRAP_TRACE 2 /* Process trace trap. */ 325 #define TRAP_DTRACE 3 /* DTrace induced trap. */ 326 #define TRAP_CAP 4 /* Capabilities protective trap. */ 327 328 /* codes for SIGCHLD */ 329 #define CLD_EXITED 1 /* Child has exited */ 330 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 331 /* did not create a core file */ 332 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 333 /* created a core file */ 334 #define CLD_TRAPPED 4 /* Traced child has trapped */ 335 #define CLD_STOPPED 5 /* Child has stopped */ 336 #define CLD_CONTINUED 6 /* Stopped child has continued */ 337 338 /* codes for SIGPOLL */ 339 #define POLL_IN 1 /* Data input available */ 340 #define POLL_OUT 2 /* Output buffers available */ 341 #define POLL_MSG 3 /* Input message available */ 342 #define POLL_ERR 4 /* I/O Error */ 343 #define POLL_PRI 5 /* High priority input available */ 344 #define POLL_HUP 6 /* Device disconnected */ 345 346 #endif 347 348 #if __POSIX_VISIBLE || __XSI_VISIBLE 349 struct __siginfo; 350 351 /* 352 * Signal vector "template" used in sigaction call. 353 */ 354 struct sigaction { 355 union { 356 void (*__sa_handler)(int); 357 void (*__sa_sigaction)(int, struct __siginfo *, void *); 358 } __sigaction_u; /* signal handler */ 359 int sa_flags; /* see signal options below */ 360 sigset_t sa_mask; /* signal mask to apply */ 361 }; 362 363 #define sa_handler __sigaction_u.__sa_handler 364 #endif 365 366 #if __XSI_VISIBLE 367 /* If SA_SIGINFO is set, sa_sigaction must be used instead of sa_handler. */ 368 #define sa_sigaction __sigaction_u.__sa_sigaction 369 #endif 370 371 #if __POSIX_VISIBLE || __XSI_VISIBLE 372 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 373 #endif /* __POSIX_VISIBLE || __XSI_VISIBLE */ 374 375 #if __XSI_VISIBLE 376 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 377 #define SA_RESTART 0x0002 /* restart system call on signal return */ 378 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 379 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 380 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 381 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 382 #endif 383 384 #if __BSD_VISIBLE 385 #define NSIG 32 /* number of old signals (counting 0) */ 386 #endif 387 388 #if __POSIX_VISIBLE || __XSI_VISIBLE 389 #define SI_NOINFO 0 /* No signal info besides si_signo. */ 390 #define SI_USER 0x10001 /* Signal sent by kill(). */ 391 #define SI_QUEUE 0x10002 /* Signal sent by the sigqueue(). */ 392 #define SI_TIMER 0x10003 /* Signal generated by expiration of */ 393 /* a timer set by timer_settime(). */ 394 #define SI_ASYNCIO 0x10004 /* Signal generated by completion of */ 395 /* an asynchronous I/O request.*/ 396 #define SI_MESGQ 0x10005 /* Signal generated by arrival of a */ 397 /* message on an empty message queue. */ 398 #define SI_KERNEL 0x10006 399 #define SI_LWP 0x10007 /* Signal sent by thr_kill */ 400 #endif 401 #if __BSD_VISIBLE 402 #define SI_UNDEFINED 0 403 #endif 404 405 #if __BSD_VISIBLE 406 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 407 typedef void __siginfohandler_t(int, struct __siginfo *, void *); 408 #endif 409 410 #if __BSD_VISIBLE 411 /* 412 * 4.3 compatibility: 413 * Signal vector "template" used in sigvec call. 414 */ 415 struct sigvec { 416 __sighandler_t *sv_handler; /* signal handler */ 417 int sv_mask; /* signal mask to apply */ 418 int sv_flags; /* see signal options below */ 419 }; 420 421 #define SV_ONSTACK SA_ONSTACK 422 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 423 #define SV_RESETHAND SA_RESETHAND 424 #define SV_NODEFER SA_NODEFER 425 #define SV_NOCLDSTOP SA_NOCLDSTOP 426 #define SV_SIGINFO SA_SIGINFO 427 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 428 #endif 429 430 /* Keep this in one place only */ 431 #if defined(_KERNEL) && defined(COMPAT_43) && \ 432 !defined(__i386__) 433 struct osigcontext { 434 int _not_used; 435 }; 436 #endif 437 438 #if __XSI_VISIBLE 439 /* 440 * Structure used in sigstack call. 441 */ 442 struct sigstack { 443 void *ss_sp; /* signal stack pointer */ 444 int ss_onstack; /* current status */ 445 }; 446 #endif 447 448 #if __BSD_VISIBLE || __POSIX_VISIBLE > 0 && __POSIX_VISIBLE <= 200112 449 /* 450 * Macro for converting signal number to a mask suitable for 451 * sigblock(). 452 */ 453 #define sigmask(m) (1 << ((m)-1)) 454 #endif 455 456 #if __BSD_VISIBLE 457 #define BADSIG SIG_ERR 458 459 /* sigqueue(2) signo high-bits flags */ 460 #define __SIGQUEUE_TID 0x80000000 /* queue for tid, instead of pid */ 461 #define __SIGQUEUE_RSRV 0x40000000 /* reserved */ 462 #endif 463 464 #if __POSIX_VISIBLE || __XSI_VISIBLE 465 /* 466 * Flags for sigprocmask: 467 */ 468 #define SIG_BLOCK 1 /* block specified signal set */ 469 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 470 #define SIG_SETMASK 3 /* set specified signal set */ 471 #endif 472 473 /* 474 * For historical reasons; programs expect signal's return value to be 475 * defined by <sys/signal.h>. 476 */ 477 __BEGIN_DECLS 478 __sighandler_t *signal(int, __sighandler_t *); 479 __END_DECLS 480 481 #endif /* !_SYS_SIGNAL_H_ */ 482