bsd/sys/signal.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1989, 1991, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  * (c) UNIX System Laboratories, Inc.
  27  * All or some portions of this file are derived from material licensed
  28  * to the University of California by American Telephone and Telegraph
  29  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  30  * the permission of UNIX System Laboratories, Inc.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)signal.h    8.2 (Berkeley) 1/21/94
  61  */
  62
  63 #ifndef _SYS_SIGNAL_H_
  64 #define _SYS_SIGNAL_H_
  65
  66 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
  67 #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
  68 #endif
  69
  70 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  71
  72 #define SIGHUP  1       /* hangup */
  73 #define SIGINT  2       /* interrupt */
  74 #define SIGQUIT 3       /* quit */
  75 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  76 #if  !defined(_POSIX_SOURCE)
  77 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  78 #endif
  79 #define SIGABRT 6       /* abort() */
  80 #if  !defined(_POSIX_SOURCE)
  81 #define SIGIOT  SIGABRT /* compatibility */
  82 #define SIGEMT  7       /* EMT instruction */
  83 #endif
  84 #define SIGFPE  8       /* floating point exception */
  85 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  86 #if  !defined(_POSIX_SOURCE)
  87 #define SIGBUS  10      /* bus error */
  88 #endif
  89 #define SIGSEGV 11      /* segmentation violation */
  90 #if  !defined(_POSIX_SOURCE)
  91 #define SIGSYS  12      /* bad argument to system call */
  92 #endif
  93 #define SIGPIPE 13      /* write on a pipe with no one to read it */
  94 #define SIGALRM 14      /* alarm clock */
  95 #define SIGTERM 15      /* software termination signal from kill */
  96 #if  !defined(_POSIX_SOURCE)
  97 #define SIGURG  16      /* urgent condition on IO channel */
  98 #endif
  99 #define SIGSTOP 17      /* sendable stop signal not from tty */
 100 #define SIGTSTP 18      /* stop signal from tty */
 101 #define SIGCONT 19      /* continue a stopped process */
 102 #define SIGCHLD 20      /* to parent on child stop or exit */
 103 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
 104 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
 105 #if  !defined(_POSIX_SOURCE)
 106 #define SIGIO   23      /* input/output possible signal */
 107 #define SIGXCPU 24      /* exceeded CPU time limit */
 108 #define SIGXFSZ 25      /* exceeded file size limit */
 109 #define SIGVTALRM 26    /* virtual time alarm */
 110 #define SIGPROF 27      /* profiling time alarm */
 111 #define SIGWINCH 28     /* window size changes */
 112 #define SIGINFO 29      /* information request */
 113 #endif
 114 #define SIGUSR1 30      /* user defined signal 1 */
 115 #define SIGUSR2 31      /* user defined signal 2 */
 116
 117 #if defined(_ANSI_SOURCE) || defined(__cplusplus)
 118 /*
 119  * Language spec sez we must list exactly one parameter, even though we
 120  * actually supply three.  Ugh!
 121  */
 122 #define SIG_DFL         (void (*)(int))0
 123 #define SIG_IGN         (void (*)(int))1
 124 #define SIG_ERR         (void (*)(int))-1
 125 #else
 126 #define SIG_DFL         (void (*)())0
 127 #define SIG_IGN         (void (*)())1
 128 #define SIG_ERR         (void (*)())-1
 129 #endif
 130
 131 #ifndef _ANSI_SOURCE
 132 typedef unsigned int sigset_t;
 133
 134 /*
 135  * Signal vector "template" used in sigaction call.
 136  */
 137 struct  sigaction {
 138 #if defined(__cplusplus)
 139         void    (*sa_handler)(int);     /* signal handler */
 140 #else
 141         void    (*sa_handler)();        /* signal handler */
 142 #endif /* __cplusplus */
 143         sigset_t sa_mask;               /* signal mask to apply */
 144         int     sa_flags;               /* see signal options below */
 145 };
 146 #if  !defined(_POSIX_SOURCE)
 147 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 148 #define SA_RESTART      0x0002  /* restart system on signal return */
 149 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
 150 #define SA_USERTRAMP    0x0100  /* do not bounce off kernel's sigtramp */
 151 #endif
 152 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 153
 154 /*
 155  * Flags for sigprocmask:
 156  */
 157 #define SIG_BLOCK       1       /* block specified signal set */
 158 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 159 #define SIG_SETMASK     3       /* set specified signal set */
 160
 161 #if !defined(_POSIX_SOURCE)
 162 #include <sys/cdefs.h>
 163 typedef void (*sig_t) __P((int));       /* type of signal function */
 164
 165 /*
 166  * Structure used in sigaltstack call.
 167  */
 168 struct  sigaltstack {
 169         char    *ss_sp;         /* signal stack base */
 170         int     ss_size;                /* signal stack length */
 171         int     ss_flags;               /* SA_DISABLE and/or SA_ONSTACK */
 172 };
 173 #define MINSIGSTKSZ     8192                    /* minimum allowable stack */
 174 #define SIGSTKSZ        (MINSIGSTKSZ + 32768)   /* recommended stack size */
 175
 176 /*
 177  * 4.3 compatibility:
 178  * Signal vector "template" used in sigvec call.
 179  */
 180 struct  sigvec {
 181         void    (*sv_handler)();        /* signal handler */
 182         int     sv_mask;                /* signal mask to apply */
 183         int     sv_flags;               /* see signal options below */
 184 };
 185
 186 #define SV_ONSTACK      SA_ONSTACK
 187 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 188 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 189
 190 /*
 191  * Structure used in sigstack call.
 192  */
 193 struct  sigstack {
 194         char    *ss_sp;                 /* signal stack pointer */
 195         int     ss_onstack;             /* current status */
 196 };
 197
 198 /*
 199  * Macro for converting signal number to a mask suitable for
 200  * sigblock().
 201  */
 202 #define sigmask(m)      (1 << ((m)-1))
 203
 204 #ifdef  KERNEL
 205                 /*
 206                  *      signals delivered on a per-thread basis.
 207                  */
 208                 #define threadmask (sigmask(SIGILL)|sigmask(SIGTRAP)|\
 209                                     sigmask(SIGIOT)|sigmask(SIGEMT)|\
 210                                     sigmask(SIGFPE)|sigmask(SIGBUS)|\
 211                                     sigmask(SIGSEGV)|sigmask(SIGSYS)|\
 212                                     sigmask(SIGPIPE))
 213 #endif  /* KERNEL */
 214
 215 #define BADSIG          SIG_ERR
 216
 217 #endif  /* !_POSIX_SOURCE */
 218 #endif  /* !_ANSI_SOURCE */
 219
 220 /*
 221  * For historical reasons; programs expect signal's return value to be
 222  * defined by <sys/signal.h>.
 223  */
 224 __BEGIN_DECLS
 225 void    (*signal __P((int, void (*) __P((int))))) __P((int));
 226 __END_DECLS
 227 #endif  /* !_SYS_SIGNAL_H_ */