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