| 1 | /* $NetBSD: signal.h,v 1.71 2016/08/04 06:43:43 christos 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 | #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ |
| 142 | |
| 143 | #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ |
| 144 | (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) |
| 145 | #define SA_ONSTACK 0x0001 /* take signal on signal stack */ |
| 146 | #define SA_RESTART 0x0002 /* restart system call on signal return */ |
| 147 | #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ |
| 148 | #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ |
| 149 | #endif /* _XOPEN_SOURCE_EXTENDED || XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ |
| 150 | /* Only valid for SIGCHLD. */ |
| 151 | #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ |
| 152 | #define SA_NOCLDWAIT 0x0020 /* do not generate zombies on unwaited child */ |
| 153 | #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ |
| 154 | defined(_NETBSD_SOURCE) |
| 155 | #define SA_SIGINFO 0x0040 /* take sa_sigaction handler */ |
| 156 | #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ |
| 157 | #if defined(_NETBSD_SOURCE) |
| 158 | #define SA_NOKERNINFO 0x0080 /* siginfo does not print kernel info on tty */ |
| 159 | #endif /*_NETBSD_SOURCE */ |
| 160 | #ifdef _KERNEL |
| 161 | #define SA_ALLBITS 0x00ff |
| 162 | #endif |
| 163 | |
| 164 | /* |
| 165 | * Flags for sigprocmask(): |
| 166 | */ |
| 167 | #define SIG_BLOCK 1 /* block specified signal set */ |
| 168 | #define SIG_UNBLOCK 2 /* unblock specified signal set */ |
| 169 | #define SIG_SETMASK 3 /* set specified signal set */ |
| 170 | |
| 171 | #if defined(_NETBSD_SOURCE) |
| 172 | typedef void (*sig_t)(int); /* type of signal function */ |
| 173 | #endif |
| 174 | |
| 175 | #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ |
| 176 | (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) |
| 177 | /* |
| 178 | * Flags used with stack_t/struct sigaltstack. |
| 179 | */ |
| 180 | #define SS_ONSTACK 0x0001 /* take signals on alternate stack */ |
| 181 | #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ |
| 182 | #ifdef _KERNEL |
| 183 | #define SS_ALLBITS 0x0005 |
| 184 | #endif |
| 185 | #define MINSIGSTKSZ 8192 /* minimum allowable stack */ |
| 186 | #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ |
| 187 | #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ |
| 188 | |
| 189 | #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \ |
| 190 | (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE) |
| 191 | /* |
| 192 | * Structure used in sigstack call. |
| 193 | */ |
| 194 | struct sigstack { |
| 195 | void *ss_sp; /* signal stack pointer */ |
| 196 | int ss_onstack; /* current status */ |
| 197 | }; |
| 198 | #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */ |
| 199 | |
| 200 | #if defined(_NETBSD_SOURCE) && !defined(_KERNEL) |
| 201 | /* |
| 202 | * Macro for converting signal number to a mask suitable for |
| 203 | * sigblock(). |
| 204 | */ |
| 205 | #define sigmask(n) __sigmask(n) |
| 206 | |
| 207 | #define BADSIG SIG_ERR |
| 208 | #endif /* _NETBSD_SOURCE */ |
| 209 | |
| 210 | #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ |
| 211 | defined(_NETBSD_SOURCE) |
| 212 | struct sigevent { |
| 213 | int sigev_notify; |
| 214 | int sigev_signo; |
| 215 | union sigval sigev_value; |
| 216 | void (*sigev_notify_function)(union sigval); |
| 217 | void /* pthread_attr_t */ *sigev_notify_attributes; |
| 218 | }; |
| 219 | |
| 220 | #define SIGEV_NONE 0 |
| 221 | #define SIGEV_SIGNAL 1 |
| 222 | #define SIGEV_THREAD 2 |
| 223 | #if defined(_NETBSD_SOURCE) |
| 224 | #define SIGEV_SA 3 |
| 225 | #endif |
| 226 | #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */ |
| 227 | |
| 228 | #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */ |
| 229 | |
| 230 | /* |
| 231 | * For historical reasons; programs expect signal's return value to be |
| 232 | * defined by <sys/signal.h>. |
| 233 | */ |
| 234 | __BEGIN_DECLS |
| 235 | void (*signal(int, void (*)(int)))(int); |
| 236 | void (*bsd_signal(int, void (*)(int)))(int); |
| 237 | #if (_POSIX_C_SOURCE - 0) >= 200112L || defined(_NETBSD_SOURCE) |
| 238 | int sigqueue(pid_t, int, const union sigval); |
| 239 | #endif |
| 240 | #if defined(_NETBSD_SOURCE) |
| 241 | int sigqueueinfo(pid_t, const siginfo_t *); |
| 242 | #endif |
| 243 | __END_DECLS |
| 244 | #endif /* !_SYS_SIGNAL_H_ */ |
| 245 | |