1 /* $NetBSD: signal.h,v 1.78 2024/09/19 14:41:05 kre Exp $ */ 2 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 * @(#)signal.h 8.4 (Berkeley) 5/4/95 37 */ 38 39 #ifndef _SYS_SIGNAL_H_ 40 #define _SYS_SIGNAL_H_ 41 42 #include <sys/featuretest.h> 43 #include <sys/sigtypes.h> 44 45 #define _NSIG 64 46 47 #if defined(_NETBSD_SOURCE) 48 #define NSIG _NSIG 49 50 #endif /* _NETBSD_SOURCE */ 51 52 #define SIGHUP 1 /* hangup */ 53 #define SIGINT 2 /* interrupt */ 54 #define SIGQUIT 3 /* quit */ 55 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 56 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 57 #define SIGABRT 6 /* abort() */ 58 #define SIGIOT SIGABRT /* compatibility */ 59 #define SIGEMT 7 /* EMT instruction */ 60 #define SIGFPE 8 /* floating point exception */ 61 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 62 #define SIGBUS 10 /* bus error */ 63 #define SIGSEGV 11 /* segmentation violation */ 64 #define SIGSYS 12 /* bad argument to system call */ 65 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 66 #define SIGALRM 14 /* alarm clock */ 67 #define SIGTERM 15 /* software termination signal from kill */ 68 #define SIGURG 16 /* urgent condition on IO channel */ 69 #define SIGSTOP 17 /* sendable stop signal not from tty */ 70 #define SIGTSTP 18 /* stop signal from tty */ 71 #define SIGCONT 19 /* continue a stopped process */ 72 #define SIGCHLD 20 /* to parent on child stop or exit */ 73 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 74 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 75 #define SIGIO 23 /* input/output possible signal */ 76 #define SIGXCPU 24 /* exceeded CPU time limit */ 77 #define SIGXFSZ 25 /* exceeded file size limit */ 78 #define SIGVTALRM 26 /* virtual time alarm */ 79 #define SIGPROF 27 /* profiling time alarm */ 80 #define SIGWINCH 28 /* window size changes */ 81 #define SIGINFO 29 /* information request */ 82 #define SIGUSR1 30 /* user defined signal 1 */ 83 #define SIGUSR2 31 /* user defined signal 2 */ 84 #define SIGPWR 32 /* power fail/restart (not reset when caught) */ 85 #define SIGRTMIN 33 86 #define SIGRTMAX 63 87 88 #ifndef _KERNEL 89 #include <sys/cdefs.h> 90 #endif 91 92 #define SIG_DFL ((void (*)(int)) 0) 93 #define SIG_IGN ((void (*)(int)) 1) 94 #define SIG_ERR ((void (*)(int)) -1) 95 #define SIG_HOLD ((void (*)(int)) 3) 96 97 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \ 98 defined(_NETBSD_SOURCE) 99 100 #ifdef _KERNEL 101 #define sigaddset(s, n) __sigaddset(s, n) 102 #define sigdelset(s, n) __sigdelset(s, n) 103 #define sigismember(s, n) __sigismember(s, n) 104 #define sigemptyset(s) __sigemptyset(s) 105 #define sigfillset(s) __sigfillset(s) 106 #define sigplusset(s, t) __sigplusset(s, t) 107 #define sigminusset(s, t) __sigminusset(s, t) 108 #endif /* _KERNEL */ 109 110 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 111 defined(_NETBSD_SOURCE) 112 #include <sys/siginfo.h> 113 #endif 114 115 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 116 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) 117 #include <sys/ucontext.h> 118 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ 119 120 /* 121 * Signal vector "template" used in sigaction call. 122 */ 123 struct sigaction { 124 union { 125 void (*_sa_handler)(int); 126 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 127 defined(_NETBSD_SOURCE) 128 void (*_sa_sigaction)(int, siginfo_t *, void *); 129 #endif 130 } _sa_u; /* signal handler */ 131 sigset_t sa_mask; /* signal mask to apply */ 132 int sa_flags; /* see signal options below */ 133 }; 134 135 #define sa_handler _sa_u._sa_handler 136 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 137 defined(_NETBSD_SOURCE) 138 #define sa_sigaction _sa_u._sa_sigaction 139 #endif 140 141 /* 142 * Signal return trampoline versioning: 143 * 144 * In historical BSD, the kernel provided the signal trampoline, copying 145 * it out to the process's stack. In NetBSD 2.0, the signal trampoline 146 * was moved into libc, and versioned in order to support the historical 147 * BSD "sigcontext" style of handler in addition to the modern "siginfo" 148 * style of handler. The trampoline and its ABI version are registered 149 * with the kernel along with the handlers. 150 * 151 * The versioning follows this general pattern: 152 * 153 * 0 Historical BSD style, trampoline provided by the kernel. This is 154 * now used only by COMPAT_* modules. 155 * 156 * 1 Legacy BSD "sigcontext" trampoline. This style is deprecated and 157 * no longer documented. However, on platforms that have a legacy 158 * "sigcontext" structure, it is still possible to register a handler 159 * that uses this trampoline. 160 * 161 * 2 Modern "siginfo" trampoline. This style is used if a handler 162 * explicitly requests "siginfo", or if the deprecation of "sigcontext" 163 * style handlers pre-dates support for the platform. 164 * 165 * Some architectures have, in the past, needed to version the "sigcontext" 166 * trampoline; an override mechanism is provided for this purpose. No more 167 * changes to the old "sigcontext" trampoline ABI will ever be performed, 168 * and support for it should not be included when adding support for new 169 * architectures. Those architectures that support the "sigcontext" 170 * trampoline must define __HAVE_STRUCT_SIGCONTEXT in <machine/signal.h>. 171 * If a 64-bit architecture needs to support "sigcontext" trampolines only 172 * for 32-bit compatibility, then __HAVE_STRUCT_SIGCONTEXT can be conditional 173 * on _KERNEL. 174 * 175 * If an architecture defines a sigcontext structure in <machine/signal.h>, 176 * it should be visible only for _KERNEL and _LIBC. 177 * 178 * In the unlikely event that an an architecture needs to version 179 * the "siginfo" trampoline, it can achieve this by overriding the 180 * various __SIGTRAMP_SIGINFO_VERSION-related constants. 181 */ 182 183 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ 184 185 #define __SIGTRAMP_SIGCODE_VERSION 0 186 187 #define __SIGTRAMP_SIGCONTEXT_VERSION_MIN 1 188 189 #ifndef __SIGTRAMP_SIGCONTEXT_VERSION_MAX 190 #define __SIGTRAMP_SIGCONTEXT_VERSION_MAX 1 191 #endif 192 193 #ifndef __SIGTRAMP_SIGCONTEXT_VERSION 194 #define __SIGTRAMP_SIGCONTEXT_VERSION 1 195 #endif 196 197 #if __SIGTRAMP_SIGCONTEXT_VERSION_MAX < __SIGTRAMP_SIGCONTEXT_VERSION_MIN 198 #error invalid __SIGTRAMP_SIGCONTEXT_VERSION_MAX 199 #endif 200 201 #ifndef __SIGTRAMP_SIGINFO_VERSION_MIN 202 #define __SIGTRAMP_SIGINFO_VERSION_MIN 2 203 #endif 204 205 #ifndef __SIGTRAMP_SIGINFO_VERSION_MAX 206 #define __SIGTRAMP_SIGINFO_VERSION_MAX 2 207 #endif 208 209 #ifndef __SIGTRAMP_SIGINFO_VERSION 210 #define __SIGTRAMP_SIGINFO_VERSION 2 211 #endif 212 213 #if __SIGTRAMP_SIGINFO_VERSION_MAX < __SIGTRAMP_SIGINFO_VERSION_MIN 214 #error invalid __SIGTRAMP_SIGINFO_VERSION_MAX 215 #endif 216 217 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 218 (_XOPEN_SOURCE - 0) >= 500 || (_POSIX_C_SOURCE - 0) >= 200809L || \ 219 defined(_NETBSD_SOURCE) 220 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 221 #define SA_RESTART 0x0002 /* restart system call on signal return */ 222 #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ 223 #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ 224 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _POSIX_C_SOURCE >= 200809L || _NETBSD_SOURCE */ 225 /* Only valid for SIGCHLD. */ 226 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 227 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 228 defined(_NETBSD_SOURCE) 229 #define SA_NOCLDWAIT 0x0020 /* do not generate zombies on unwaited child */ 230 #define SA_SIGINFO 0x0040 /* take sa_sigaction handler */ 231 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ 232 #if defined(_NETBSD_SOURCE) 233 #define SA_NOKERNINFO 0x0080 /* siginfo does not print kernel info on tty */ 234 #endif /*_NETBSD_SOURCE */ 235 #ifdef _KERNEL 236 #define SA_ALLBITS 0x00ff 237 #endif 238 239 /* 240 * Flags for sigprocmask(): 241 */ 242 #define SIG_BLOCK 1 /* block specified signal set */ 243 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 244 #define SIG_SETMASK 3 /* set specified signal set */ 245 246 #if defined(_NETBSD_SOURCE) 247 typedef void (*sig_t)(int); /* type of signal function */ 248 249 #define SS_INIT /* Initializer for stack_t */ \ 250 ((stack_t) { .ss_sp = NULL, .ss_flags = SS_DISABLE, .ss_size = 0 }) 251 252 #endif 253 254 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 255 (_XOPEN_SOURCE - 0) >= 500 || (_POSIX_C_SOURCE - 0) >= 200809L || \ 256 defined(_NETBSD_SOURCE) 257 /* 258 * Flags used with stack_t/struct sigaltstack. 259 */ 260 #define SS_ONSTACK 0x0001 /* take signals on alternate stack */ 261 #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ 262 #ifdef _KERNEL 263 #define SS_ALLBITS 0x0005 264 #endif 265 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 266 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 267 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 268 * || _POSIX_C_SOURCE >= 200809L || _NETBSD_SOURCE 269 */ 270 271 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ 272 (_XOPEN_SOURCE - 0) >= 500 || (_POSIX_C_SOURCE - 0) >= 200809L || \ 273 defined(_NETBSD_SOURCE) 274 /* 275 * Structure used in sigstack call. 276 */ 277 struct sigstack { 278 void *ss_sp; /* signal stack pointer */ 279 int ss_onstack; /* current status */ 280 }; 281 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 282 * || _POSIX_C_SOURCE >= 200809L || _NETBSD_SOURCE 283 */ 284 285 #if defined(_NETBSD_SOURCE) && !defined(_KERNEL) 286 /* 287 * Macro for converting signal number to a mask suitable for 288 * sigblock(). 289 */ 290 #define sigmask(n) __sigmask(n) 291 292 #define BADSIG SIG_ERR 293 #endif /* _NETBSD_SOURCE */ 294 295 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 296 defined(_NETBSD_SOURCE) 297 struct sigevent { 298 int sigev_notify; 299 int sigev_signo; 300 union sigval sigev_value; 301 void (*sigev_notify_function)(union sigval); 302 void /* pthread_attr_t */ *sigev_notify_attributes; 303 }; 304 305 #define SIGEV_NONE 0 306 #define SIGEV_SIGNAL 1 307 #define SIGEV_THREAD 2 308 #if defined(_NETBSD_SOURCE) 309 #define SIGEV_SA 3 310 #endif 311 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ 312 313 #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */ 314 315 /* 316 * For historical reasons; programs expect signal's return value to be 317 * defined by <sys/signal.h>. 318 */ 319 __BEGIN_DECLS 320 void (*signal(int, void (*)(int)))(int); 321 #if (_POSIX_C_SOURCE - 0) >= 200112L || defined(_NETBSD_SOURCE) 322 int sigqueue(pid_t, int, const union sigval); 323 #endif 324 325 #if defined(_NETBSD_SOURCE) || \ 326 (!defined (_XOPEN_SOURCE) && defined(_XOPEN_VERSION) && \ 327 (_XOPEN_VERSION - 0) >= 4) || \ 328 (defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0) <= 600) 329 /* 330 * bsd_signal() was added to the standards in POSIX issue 4 (SusV4) 331 * (release 2 of SusV4) and then removed in POSIX issue 7 (2008), 332 * after being marked obsolete in POSIX issue 6 (2001). It was 333 * always an X/Open extension function (though was moved to the 334 * base POSIX spec in issue 5, but still as an extension). 335 */ 336 void (*bsd_signal(int, void (*)(int)))(int); 337 #endif 338 #if defined(_NETBSD_SOURCE) 339 int sigqueueinfo(pid_t, const siginfo_t *); 340 #endif 341 __END_DECLS 342 #endif /* !_SYS_SIGNAL_H_ */ 343
Indexes created Sat Sep 20 22:09:52 GMT 2025