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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)signal.h 8.4 (Berkeley) 5/4/95 39 * $FreeBSD: src/sys/sys/signal.h,v 1.23.2.2 2001/04/19 01:38:35 alfred Exp $ 40 */ 41 42 #ifndef _SYS_SIGNAL_H_ 43 #define _SYS_SIGNAL_H_ 44 45 #include <machine/stdint.h> /* for __ types */ 46 #include <sys/cdefs.h> 47 #include <sys/_posix.h> 48 49 /* 50 * sigset_t macros. 51 */ 52 #define _SIG_WORDS 4 53 #define _SIG_MAXSIG 128 54 #define _SIG_IDX(sig) ((sig) - 1) 55 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 56 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 57 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 58 59 /* 60 * System defined signals. 61 */ 62 #define SIGHUP 1 /* hangup */ 63 #define SIGINT 2 /* interrupt */ 64 #define SIGQUIT 3 /* quit */ 65 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 66 #ifndef _POSIX_SOURCE 67 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 68 #endif 69 #define SIGABRT 6 /* abort() */ 70 #ifndef _POSIX_SOURCE 71 #define SIGIOT SIGABRT /* compatibility */ 72 #define SIGEMT 7 /* EMT instruction */ 73 #endif 74 #define SIGFPE 8 /* floating point exception */ 75 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 76 #ifndef _POSIX_SOURCE 77 #define SIGBUS 10 /* bus error */ 78 #endif 79 #define SIGSEGV 11 /* segmentation violation */ 80 #ifndef _POSIX_SOURCE 81 #define SIGSYS 12 /* non-existent system call invoked */ 82 #endif 83 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 84 #define SIGALRM 14 /* alarm clock */ 85 #define SIGTERM 15 /* software termination signal from kill */ 86 #ifndef _POSIX_SOURCE 87 #define SIGURG 16 /* urgent condition on IO channel */ 88 #endif 89 #define SIGSTOP 17 /* sendable stop signal not from tty */ 90 #define SIGTSTP 18 /* stop signal from tty */ 91 #define SIGCONT 19 /* continue a stopped process */ 92 #define SIGCHLD 20 /* to parent on child stop or exit */ 93 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 94 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 95 #ifndef _POSIX_SOURCE 96 #define SIGIO 23 /* input/output possible signal */ 97 #define SIGXCPU 24 /* exceeded CPU time limit */ 98 #define SIGXFSZ 25 /* exceeded file size limit */ 99 #define SIGVTALRM 26 /* virtual time alarm */ 100 #define SIGPROF 27 /* profiling time alarm */ 101 #define SIGWINCH 28 /* window size changes */ 102 #define SIGINFO 29 /* information request */ 103 #endif 104 #define SIGUSR1 30 /* user defined signal 1 */ 105 #define SIGUSR2 31 /* user defined signal 2 */ 106 #if __BSD_VISIBLE 107 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 108 #define SIGCKPT 33 /* checkpoint and continue */ 109 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 110 #endif 111 112 /* 113 * si_code stuff 114 */ 115 /* SIGILL */ 116 #define ILL_ILLOPC 1 /* Illegal opcode */ 117 #define ILL_ILLOPN 2 /* Illegal operand */ 118 #define ILL_ILLADR 3 /* Illegal addressing mode */ 119 #define ILL_ILLTRP 4 /* Illegal trap */ 120 #define ILL_PRVOPC 5 /* Privileged opcode */ 121 #define ILL_PRVREG 6 /* Privileged register */ 122 #define ILL_COPROC 7 /* Coprocessor error */ 123 #define ILL_BADSTK 8 /* Internal stack error */ 124 125 /* SIGFPE */ 126 #define FPE_INTOVF 1 /* Integer overflow */ 127 #define FPE_INTDIV 2 /* Integer divide by zero */ 128 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 129 #define FPE_FLTOVF 4 /* Floating point overflow */ 130 #define FPE_FLTUND 5 /* Floating point underflow */ 131 #define FPE_FLTRES 6 /* Floating point inexact result */ 132 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 133 #define FPE_FLTSUB 8 /* Subscript out of range */ 134 135 /* SIGSEGV */ 136 #define SEGV_MAPERR 1 /* Address not mapped to object */ 137 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 138 139 /* SIGBUS */ 140 #define BUS_ADRALN 1 /* Invalid address alignment */ 141 #define BUS_ADRERR 2 /* Non-existent physical address */ 142 #define BUS_OBJERR 3 /* Object specific hardware error */ 143 144 /* SIGTRAP */ 145 #define TRAP_BRKPT 1 /* Process breakpoint */ 146 #define TRAP_TRACE 2 /* Process trace trap */ 147 148 /* SIGCHLD */ 149 #define CLD_EXITED 1 /* Child has exited */ 150 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 151 /* did not create a core file */ 152 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 153 /* created a core file */ 154 #define CLD_TRAPPED 4 /* Traced child has trapped */ 155 #define CLD_STOPPED 5 /* Child has stopped */ 156 #define CLD_CONTINUED 6 /* Stopped child has continued */ 157 158 /* SIGPOLL */ 159 #define POLL_IN 1 /* Data input available */ 160 #define POLL_OUT 2 /* Output buffers available */ 161 #define POLL_MSG 3 /* Input message available */ 162 #define POLL_ERR 4 /* I/O Error */ 163 #define POLL_PRI 5 /* High priority input available */ 164 #define POLL_HUP 6 /* Device disconnected */ 165 166 167 /** si_code */ 168 #define SI_USER 0 /* Sent by kill(2) */ 169 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 170 #define SI_TIMER -2 /* Generated by expiration of a timer */ 171 /* set by timer_settime(2) */ 172 #define SI_ASYNCIO -3 /* Generated by completion of an */ 173 /* asynchronous I/O signal */ 174 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 175 /* an empty message queue */ 176 177 /*- 178 * Type of a signal handling function. 179 * 180 * Language spec sez signal handlers take exactly one arg, even though we 181 * actually supply three. Ugh! 182 * 183 * We don't try to hide the difference by leaving out the args because 184 * that would cause warnings about conformant programs. Nonconformant 185 * programs can avoid the warnings by casting to (__sighandler_t *) or 186 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 187 * 188 * The kernel should reverse the cast before calling the function. It 189 * has no way to do this, but on most machines 1-arg and 3-arg functions 190 * have the same calling protocol so there is no problem in practice. 191 * A bit in sa_flags could be used to specify the number of args. 192 * 193 * SIG_EINTR causes system calls to interrupt but generates no signal 194 * delivery. The caller is responsible for polling the event. 195 */ 196 typedef void __sighandler_t (int); 197 198 #define SIG_DFL ((__sighandler_t *)0) 199 #define SIG_IGN ((__sighandler_t *)1) 200 #define SIG_ERR ((__sighandler_t *)-1) 201 202 #if defined(_P1003_1B_VISIBLE) || defined(_KERNEL) 203 union sigval { 204 /* Members as suggested by SuSv2 and IEEE Std 1003.1 */ 205 int sival_int; 206 void *sival_ptr; 207 /* Leave old members for backward compatibility */ 208 int sigval_int; 209 void *sigval_ptr; 210 211 }; 212 213 struct sigevent { 214 int sigev_notify; /* Notification type */ 215 union { 216 int __sigev_signo; /* Signal number */ 217 int __sigev_notify_kqueue; 218 void *__sigev_notify_attributes; 219 } __sigev_u; 220 union sigval sigev_value; /* Signal value */ 221 void (*sigev_notify_function)(union sigval); 222 }; 223 #define sigev_signo __sigev_u.__sigev_signo 224 #define sigev_notify_attributes __sigev_u.__sigev_notify_attributes 225 #define sigev_notify_kqueue __sigev_u.__sigev_notify_kqueue 226 227 #define SIGEV_NONE 0 /* No async notification */ 228 #define SIGEV_SIGNAL 1 /* Generate a queued signal */ 229 #define SIGEV_THREAD 2 /* Call back in a pthread */ 230 #define SIGEV_KEVENT 3 /* Generate a kevent */ 231 232 typedef struct __siginfo { 233 int si_signo; /* signal number */ 234 int si_errno; /* errno association */ 235 /* 236 * Cause of signal, one of the SI_ macros or signal-specific 237 * values, i.e. one of the FPE_... values for SIGFPE. This 238 * value is equivalent to the second argument to an old-style 239 * FreeBSD signal handler. 240 */ 241 int si_code; /* signal code */ 242 int si_pid; /* sending process */ 243 unsigned int si_uid; /* sender's ruid */ 244 int si_status; /* exit value */ 245 void *si_addr; /* faulting instruction */ 246 union sigval si_value; /* signal value */ 247 long si_band; /* band event for SIGPOLL */ 248 int __spare__[7]; /* gimme some slack */ 249 } siginfo_t; 250 #endif /* _P1003_1B_VISIBLE */ 251 252 typedef struct __sigset { 253 unsigned int __bits[_SIG_WORDS]; 254 } sigset_t; 255 256 /* 257 * XXX - there are some nasty dependencies on include file order. Now that 258 * sigset_t has been defined we can include the MD header. 259 */ 260 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 261 262 #if !defined(_ANSI_SOURCE) 263 264 struct __siginfo; 265 266 /* 267 * Signal vector "template" used in sigaction call. 268 */ 269 struct sigaction { 270 union { 271 void (*__sa_handler) (int); 272 void (*__sa_sigaction) (int, struct __siginfo *, void *); 273 } __sigaction_u; /* signal handler */ 274 int sa_flags; /* see signal options below */ 275 sigset_t sa_mask; /* signal mask to apply */ 276 }; 277 278 /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ 279 #define sa_handler __sigaction_u.__sa_handler 280 281 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 282 283 #if !defined(_POSIX_SOURCE) 284 285 #define sa_sigaction __sigaction_u.__sa_sigaction 286 287 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 288 #define SA_RESTART 0x0002 /* restart system call on signal return */ 289 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 290 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 291 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 292 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 293 294 #define NSIG 64 /* size of sigptbl */ 295 296 /* Additional FreeBSD values. */ 297 #define SI_UNDEFINED 0 298 299 typedef void __siginfohandler_t (int, struct __siginfo *, void *); 300 301 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 302 303 /* 304 * Structure used in sigaltstack call. 305 */ 306 typedef struct sigaltstack { 307 char *ss_sp; /* signal stack base */ 308 __size_t ss_size; /* signal stack length */ 309 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 310 } stack_t; 311 312 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 313 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 314 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 315 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 316 317 /* Have enough typedefs for this now. XXX */ 318 #include <sys/ucontext.h> 319 320 /* 321 * 4.3 compatibility: 322 * Signal vector "template" used in sigvec call. 323 */ 324 struct sigvec { 325 __sighandler_t *sv_handler; /* signal handler */ 326 int sv_mask; /* signal mask to apply */ 327 int sv_flags; /* see signal options below */ 328 }; 329 330 #define SV_ONSTACK SA_ONSTACK 331 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 332 #define SV_RESETHAND SA_RESETHAND 333 #define SV_NODEFER SA_NODEFER 334 #define SV_NOCLDSTOP SA_NOCLDSTOP 335 #define SV_SIGINFO SA_SIGINFO 336 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 337 338 /* 339 * Structure used in sigstack call. 340 */ 341 struct sigstack { 342 char *ss_sp; /* signal stack pointer */ 343 int ss_onstack; /* current status */ 344 }; 345 346 /* 347 * Macro for converting signal number to a mask suitable for 348 * sigblock(). 349 */ 350 #define sigmask(m) (1 << ((m)-1)) 351 352 #define BADSIG SIG_ERR 353 354 #endif /* !_POSIX_SOURCE */ 355 356 /* 357 * Flags for sigprocmask: 358 */ 359 #define SIG_BLOCK 1 /* block specified signal set */ 360 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 361 #define SIG_SETMASK 3 /* set specified signal set */ 362 363 #endif /* !_ANSI_SOURCE */ 364 365 /* 366 * For historical reasons; programs expect signal's return value to be 367 * defined by <sys/signal.h>. 368 */ 369 __BEGIN_DECLS 370 __sighandler_t *signal (int, __sighandler_t *); 371 __END_DECLS 372 373 #endif /* !_SYS_SIGNAL_H_ */ 374