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 * $DragonFly: src/sys/sys/signal.h,v 1.6 2007/01/14 07:59:08 dillon Exp $ 41 */ 42 43 #ifndef _SYS_SIGNAL_H_ 44 #define _SYS_SIGNAL_H_ 45 46 #ifndef _MACHINE_STDINT_H_ 47 #include <machine/stdint.h> /* for __ types */ 48 #endif 49 #include <sys/cdefs.h> 50 #include <sys/_posix.h> 51 52 /* 53 * sigset_t macros. 54 */ 55 #define _SIG_WORDS 4 56 #define _SIG_MAXSIG 128 57 #define _SIG_IDX(sig) ((sig) - 1) 58 #define _SIG_WORD(sig) (_SIG_IDX(sig) >> 5) 59 #define _SIG_BIT(sig) (1 << (_SIG_IDX(sig) & 31)) 60 #define _SIG_VALID(sig) ((sig) < _SIG_MAXSIG && (sig) > 0) 61 62 /* 63 * System defined signals. 64 */ 65 #define SIGHUP 1 /* hangup */ 66 #define SIGINT 2 /* interrupt */ 67 #define SIGQUIT 3 /* quit */ 68 #define SIGILL 4 /* illegal instr. (not reset when caught) */ 69 #ifndef _POSIX_SOURCE 70 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 71 #endif 72 #define SIGABRT 6 /* abort() */ 73 #ifndef _POSIX_SOURCE 74 #define SIGIOT SIGABRT /* compatibility */ 75 #define SIGEMT 7 /* EMT instruction */ 76 #endif 77 #define SIGFPE 8 /* floating point exception */ 78 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 79 #ifndef _POSIX_SOURCE 80 #define SIGBUS 10 /* bus error */ 81 #endif 82 #define SIGSEGV 11 /* segmentation violation */ 83 #ifndef _POSIX_SOURCE 84 #define SIGSYS 12 /* non-existent system call invoked */ 85 #endif 86 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 87 #define SIGALRM 14 /* alarm clock */ 88 #define SIGTERM 15 /* software termination signal from kill */ 89 #ifndef _POSIX_SOURCE 90 #define SIGURG 16 /* urgent condition on IO channel */ 91 #endif 92 #define SIGSTOP 17 /* sendable stop signal not from tty */ 93 #define SIGTSTP 18 /* stop signal from tty */ 94 #define SIGCONT 19 /* continue a stopped process */ 95 #define SIGCHLD 20 /* to parent on child stop or exit */ 96 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 97 #define SIGTTOU 22 /* like TTIN if (tp->t_local<OSTOP) */ 98 #ifndef _POSIX_SOURCE 99 #define SIGIO 23 /* input/output possible signal */ 100 #define SIGXCPU 24 /* exceeded CPU time limit */ 101 #define SIGXFSZ 25 /* exceeded file size limit */ 102 #define SIGVTALRM 26 /* virtual time alarm */ 103 #define SIGPROF 27 /* profiling time alarm */ 104 #define SIGWINCH 28 /* window size changes */ 105 #define SIGINFO 29 /* information request */ 106 #endif 107 #define SIGUSR1 30 /* user defined signal 1 */ 108 #define SIGUSR2 31 /* user defined signal 2 */ 109 #if __BSD_VISIBLE 110 #define SIGTHR 32 /* Thread interrupt (FreeBSD-5 reserved) */ 111 #define SIGCKPT 33 /* checkpoint and continue */ 112 #define SIGCKPTEXIT 34 /* checkpoint and exit */ 113 #endif 114 115 /* 116 * si_code stuff 117 */ 118 /* SIGILL */ 119 #define ILL_ILLOPC 1 /* Illegal opcode */ 120 #define ILL_ILLOPN 2 /* Illegal operand */ 121 #define ILL_ILLADR 3 /* Illegal addressing mode */ 122 #define ILL_ILLTRP 4 /* Illegal trap */ 123 #define ILL_PRVOPC 5 /* Privileged opcode */ 124 #define ILL_PRVREG 6 /* Privileged register */ 125 #define ILL_COPROC 7 /* Coprocessor error */ 126 #define ILL_BADSTK 8 /* Internal stack error */ 127 128 /* SIGFPE */ 129 #define FPE_INTOVF 1 /* Integer overflow */ 130 #define FPE_INTDIV 2 /* Integer divide by zero */ 131 #define FPE_FLTDIV 3 /* Floating point divide by zero */ 132 #define FPE_FLTOVF 4 /* Floating point overflow */ 133 #define FPE_FLTUND 5 /* Floating point underflow */ 134 #define FPE_FLTRES 6 /* Floating point inexact result */ 135 #define FPE_FLTINV 7 /* Invalid Floating point operation */ 136 #define FPE_FLTSUB 8 /* Subscript out of range */ 137 138 /* SIGSEGV */ 139 #define SEGV_MAPERR 1 /* Address not mapped to object */ 140 #define SEGV_ACCERR 2 /* Invalid permissions for mapped object*/ 141 142 /* SIGBUS */ 143 #define BUS_ADRALN 1 /* Invalid address alignment */ 144 #define BUS_ADRERR 2 /* Non-existent physical address */ 145 #define BUS_OBJERR 3 /* Object specific hardware error */ 146 147 /* SIGTRAP */ 148 #define TRAP_BRKPT 1 /* Process breakpoint */ 149 #define TRAP_TRACE 2 /* Process trace trap */ 150 151 /* SIGCHLD */ 152 #define CLD_EXITED 1 /* Child has exited */ 153 #define CLD_KILLED 2 /* Child has terminated abnormally but */ 154 /* did not create a core file */ 155 #define CLD_DUMPED 3 /* Child has terminated abnormally and */ 156 /* created a core file */ 157 #define CLD_TRAPPED 4 /* Traced child has trapped */ 158 #define CLD_STOPPED 5 /* Child has stopped */ 159 #define CLD_CONTINUED 6 /* Stopped child has continued */ 160 161 /* SIGPOLL */ 162 #define POLL_IN 1 /* Data input available */ 163 #define POLL_OUT 2 /* Output buffers available */ 164 #define POLL_MSG 3 /* Input message available */ 165 #define POLL_ERR 4 /* I/O Error */ 166 #define POLL_PRI 5 /* High priority input available */ 167 #define POLL_HUP 6 /* Device disconnected */ 168 169 170 /** si_code */ 171 #define SI_USER 0 /* Sent by kill(2) */ 172 #define SI_QUEUE -1 /* Sent by the sigqueue(2) */ 173 #define SI_TIMER -2 /* Generated by expiration of a timer */ 174 /* set by timer_settime(2) */ 175 #define SI_ASYNCIO -3 /* Generated by completion of an */ 176 /* asynchronous I/O signal */ 177 #define SI_MESGQ -4 /* Generated by arrival of a message on */ 178 /* an empty message queue */ 179 180 /*- 181 * Type of a signal handling function. 182 * 183 * Language spec sez signal handlers take exactly one arg, even though we 184 * actually supply three. Ugh! 185 * 186 * We don't try to hide the difference by leaving out the args because 187 * that would cause warnings about conformant programs. Nonconformant 188 * programs can avoid the warnings by casting to (__sighandler_t *) or 189 * sig_t before calling signal() or assigning to sa_handler or sv_handler. 190 * 191 * The kernel should reverse the cast before calling the function. It 192 * has no way to do this, but on most machines 1-arg and 3-arg functions 193 * have the same calling protocol so there is no problem in practice. 194 * A bit in sa_flags could be used to specify the number of args. 195 * 196 * SIG_EINTR causes system calls to interrupt but generates no signal 197 * delivery. The caller is responsible for polling the event. 198 */ 199 typedef void __sighandler_t (int); 200 201 #define SIG_DFL ((__sighandler_t *)0) 202 #define SIG_IGN ((__sighandler_t *)1) 203 #define SIG_ERR ((__sighandler_t *)-1) 204 205 #if defined(_P1003_1B_VISIBLE) || defined(_KERNEL) 206 union sigval { 207 /* Members as suggested by SuSv2 and IEEE Std 1003.1 */ 208 int sival_int; 209 void *sival_ptr; 210 /* Leave old members for backward compatibility */ 211 int sigval_int; 212 void *sigval_ptr; 213 214 }; 215 216 struct sigevent { 217 int sigev_notify; /* Notification type */ 218 union { 219 int __sigev_signo; /* Signal number */ 220 int __sigev_notify_kqueue; 221 } __sigev_u; 222 union sigval sigev_value; /* Signal value */ 223 }; 224 #define sigev_signo __sigev_u.__sigev_signo 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_KEVENT 3 /* Generate a kevent */ 230 231 typedef struct __siginfo { 232 int si_signo; /* signal number */ 233 int si_errno; /* errno association */ 234 /* 235 * Cause of signal, one of the SI_ macros or signal-specific 236 * values, i.e. one of the FPE_... values for SIGFPE. This 237 * value is equivalent to the second argument to an old-style 238 * FreeBSD signal handler. 239 */ 240 int si_code; /* signal code */ 241 int si_pid; /* sending process */ 242 unsigned int si_uid; /* sender's ruid */ 243 int si_status; /* exit value */ 244 void *si_addr; /* faulting instruction */ 245 union sigval si_value; /* signal value */ 246 long si_band; /* band event for SIGPOLL */ 247 int __spare__[7]; /* gimme some slack */ 248 } siginfo_t; 249 #endif /* _P1003_1B_VISIBLE */ 250 251 typedef struct __sigset { 252 unsigned int __bits[_SIG_WORDS]; 253 } sigset_t; 254 255 /* 256 * XXX - there are some nasty dependencies on include file order. Now that 257 * sigset_t has been defined we can include the MD header. 258 */ 259 #include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */ 260 261 #if !defined(_ANSI_SOURCE) 262 263 struct __siginfo; 264 265 /* 266 * Signal vector "template" used in sigaction call. 267 */ 268 struct sigaction { 269 union { 270 void (*__sa_handler) (int); 271 void (*__sa_sigaction) (int, struct __siginfo *, void *); 272 int *__sa_mailbox; 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 #define sa_mailbox __sigaction_u.__sa_mailbox 287 288 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 289 #define SA_RESTART 0x0002 /* restart system call on signal return */ 290 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 291 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 292 #define SA_NOCLDWAIT 0x0020 /* don't keep zombies around */ 293 #define SA_SIGINFO 0x0040 /* signal handler with SA_SIGINFO args */ 294 #ifdef COMPAT_SUNOS 295 #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */ 296 #endif 297 #define SA_MAILBOX 0x1000 /* store to mailbox */ 298 299 #define NSIG 64 /* size of sigptbl */ 300 301 /* Additional FreeBSD values. */ 302 #define SI_UNDEFINED 0 303 304 typedef void __siginfohandler_t (int, struct __siginfo *, void *); 305 306 typedef __sighandler_t *sig_t; /* type of pointer to a signal function */ 307 308 /* 309 * Structure used in sigaltstack call. 310 */ 311 typedef struct sigaltstack { 312 char *ss_sp; /* signal stack base */ 313 __size_t ss_size; /* signal stack length */ 314 int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ 315 } stack_t; 316 317 #define SS_ONSTACK 0x0001 /* take signal on alternate stack */ 318 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 319 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 320 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 321 322 /* Have enough typedefs for this now. XXX */ 323 #include <sys/ucontext.h> 324 325 /* 326 * 4.3 compatibility: 327 * Signal vector "template" used in sigvec call. 328 */ 329 struct sigvec { 330 __sighandler_t *sv_handler; /* signal handler */ 331 int sv_mask; /* signal mask to apply */ 332 int sv_flags; /* see signal options below */ 333 }; 334 335 #define SV_ONSTACK SA_ONSTACK 336 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 337 #define SV_RESETHAND SA_RESETHAND 338 #define SV_NODEFER SA_NODEFER 339 #define SV_NOCLDSTOP SA_NOCLDSTOP 340 #define SV_SIGINFO SA_SIGINFO 341 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 342 343 /* 344 * Structure used in sigstack call. 345 */ 346 struct sigstack { 347 char *ss_sp; /* signal stack pointer */ 348 int ss_onstack; /* current status */ 349 }; 350 351 /* 352 * Macro for converting signal number to a mask suitable for 353 * sigblock(). 354 */ 355 #define sigmask(m) (1 << ((m)-1)) 356 357 #define BADSIG SIG_ERR 358 359 #endif /* !_POSIX_SOURCE */ 360 361 /* 362 * Flags for sigprocmask: 363 */ 364 #define SIG_BLOCK 1 /* block specified signal set */ 365 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 366 #define SIG_SETMASK 3 /* set specified signal set */ 367 368 #endif /* !_ANSI_SOURCE */ 369 370 /* 371 * For historical reasons; programs expect signal's return value to be 372 * defined by <sys/signal.h>. 373 */ 374 __BEGIN_DECLS 375 __sighandler_t *signal (int, __sighandler_t *); 376 __END_DECLS 377 378 #endif /* !_SYS_SIGNAL_H_ */ 379