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   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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)signal.h    8.4 (Berkeley) 5/4/95
  35  */
  37 #ifndef _SYS_SIGNAL_H_
  38 #define _SYS_SIGNAL_H_
  40 #define NSIG    32              /* counting 0; could be 33 (mask is 1-32) */
  42 #include <machine/signal.h>     /* sigcontext */
  44 #define SIGHUP  1       /* hangup */
  45 #define SIGINT  2       /* interrupt */
  46 #define SIGQUIT 3       /* quit */
  47 #define SIGILL  4       /* illegal instruction (not reset when caught) */
  48 #define SIGTRAP 5       /* trace trap (not reset when caught) */
  49 #define SIGABRT 6       /* abort() */
  50 #define SIGIOT  SIGABRT /* compatibility */
  51 #define SIGEMT  7       /* EMT instruction */
  52 #define SIGFPE  8       /* floating point exception */
  53 #define SIGKILL 9       /* kill (cannot be caught or ignored) */
  54 #define SIGBUS  10      /* bus error */
  55 #define SIGSEGV 11      /* segmentation violation */
  56 #define SIGSYS  12      /* bad argument to system call */
  57 #define SIGPIPE 13      /* write on a pipe with no one to read it */
  58 #define SIGALRM 14      /* alarm clock */
  59 #define SIGTERM 15      /* software termination signal from kill */
  60 #define SIGURG  16      /* urgent condition on IO channel */
  61 #define SIGSTOP 17      /* sendable stop signal not from tty */
  62 #define SIGTSTP 18      /* stop signal from tty */
  63 #define SIGCONT 19      /* continue a stopped process */
  64 #define SIGCHLD 20      /* to parent on child stop or exit */
  65 #define SIGTTIN 21      /* to readers pgrp upon background tty read */
  66 #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
  67 #define SIGIO   23      /* input/output possible signal */
  68 #define SIGXCPU 24      /* exceeded CPU time limit */
  69 #define SIGXFSZ 25      /* exceeded file size limit */
  70 #define SIGVTALRM 26    /* virtual time alarm */
  71 #define SIGPROF 27      /* profiling time alarm */
  72 #define SIGWINCH 28     /* window size changes */
  73 #define SIGINFO 29      /* information request */
  74 #define SIGPWR  SIGINFO
  75 #define SIGUSR1 30      /* user defined signal 1 */
  76 #define SIGUSR2 31      /* user defined signal 2 */
  78 #ifndef KERNEL
  80 /*
  81  * Language spec sez we must list exactly one parameter, even though we
  82  * actually supply three.  Ugh!
  83  */
  84 #define SIG_DFL         ((void (*)(int))  0)
  85 #define SIG_IGN         ((void (*)(int))  1)
  86 #define SIG_ERR         ((void (*)(int)) -1)
  88 typedef unsigned int sigset_t;
  90 union sigval {
  91         int     sival_int;
  92         void    *sival_ptr;
  93 };
  95 struct siginfo {
  96         int     si_signo;       /* redundant signal number */
  97         int     si_code;        /* facility that raised this signal */
  98         union sigval si_value;  /* value that was queued with signal */
  99 };
 101 typedef struct siginfo siginfo_t;
 103 /*
 104  * Signal vector "template" used in sigaction call.
 105  */
 106 struct sigaction {
 107         union {
 108                 void (*__sa_handler) (int);
 109                 void (*__sa_sigaction) (int, siginfo_t *, void *);
 110         } __sigaction_u;
sigset_t sa_mask;
 112         int sa_flags;
 113 };
 115 #define sa_handler      __sigaction_u.__sa_handler
 116 #define sa_sigaction    __sigaction_u.__sa_sigaction
 118 /* sa_flags bits */
 120 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
 121 #define SA_RESTART      0x0002  /* restart system on signal return */
 122 #define SA_DISABLE      0x0004  /* disable taking signals on alternate stack */
 123 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
 124 #define SA_SIGINFO      0x0040  /* take sa_sigaction handler */
 126 /*
 127  * Flags for sigprocmask:
 128  */
 129 #define SIG_BLOCK       1       /* block specified signal set */
 130 #define SIG_UNBLOCK     2       /* unblock specified signal set */
 131 #define SIG_SETMASK     3       /* set specified signal set */
 133 #include <sys/cdefs.h>
 135 typedef void (*sig_t)(int);     /* type of signal function */
 137 /*
 138  * Structure used in sigaltstack call.
 139  */
 140 struct  sigaltstack {
 141         char    *ss_base;               /* signal stack base */
 142         int     ss_size;                /* signal stack length */
 143         int     ss_flags;               /* SA_DISABLE and/or SA_ONSTACK */
 144 };
 145 #define MINSIGSTKSZ     8192                    /* minimum allowable stack */
 146 #define SIGSTKSZ        (MINSIGSTKSZ + 32768)   /* recommended stack size */
 148 /*
 149  * 4.3 compatibility:
 150  * Signal vector "template" used in sigvec call.
 151  */
 152 struct  sigvec {
 153         void    (*sv_handler)(int);     /* signal handler */
 154         int     sv_mask;                /* signal mask to apply */
 155         int     sv_flags;               /* see signal options below */
 156 };
 158 #define SV_ONSTACK      SA_ONSTACK
 159 #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
 160 #define sv_onstack sv_flags     /* isn't compatibility wonderful! */
 162 /*
 163  * Structure used in sigstack call.
 164  */
 165 struct  sigstack {
 166         char    *ss_sp;                 /* signal stack pointer */
 167         int     ss_onstack;             /* current status */
 168 };
 170 /*
 171  * Macro for converting signal number to a mask suitable for
 172  * sigblock().
 173  */
 174 #define sigmask(m)      (1 << ((m)-1))
 176 #define BADSIG          SIG_ERR
 178 #ifdef _REENTRANT
 179 extern mutex_t __sig_lock;
 180 #define SIGNAL_LOCK()   mutex_lock(&__sig_lock)
 181 #define SIGNAL_UNLOCK() mutex_unlock(&__sig_lock)
 182 #else
 183 #define SIGNAL_LOCK()
 184 #define SIGNAL_UNLOCK()
 185 #endif
 187 extern struct sigaction __sig_act[NSIG];
 188 extern sigset_t __sig_mask;
 189 extern sigset_t __sig_pending;
 191 /*
 192  * For historical reasons; programs expect signal's return value to be
 193  * defined by <sys/signal.h>.
 194  */
__BEGIN_DECLS
 196 void    (*signal(int, void (*)(int)))(int);
 197 int     __sig_flush(void);
__END_DECLS
 200 #endif /* !KERNEL */
 201 #endif  /* !_SYS_SIGNAL_H_ */