The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/signal.h

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    1 /*      $NetBSD: signal.h,v 1.64 2008/02/27 22:18:41 hubertf 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&LTOSTOP) */
   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 #ifdef _KERNEL
   86 #define SIGRTMIN        33      /* Kernel only; not exposed to userland yet */
   87 #define SIGRTMAX        63      /* Kernel only; not exposed to userland yet */
   88 #endif
   89 
   90 #ifndef _KERNEL
   91 #include <sys/cdefs.h>
   92 #endif
   93 
   94 #define SIG_DFL         ((void (*)(int))  0)
   95 #define SIG_IGN         ((void (*)(int))  1)
   96 #define SIG_ERR         ((void (*)(int)) -1)
   97 #define SIG_HOLD        ((void (*)(int))  3)
   98 
   99 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
  100     defined(_NETBSD_SOURCE)
  101 
  102 #ifdef _KERNEL
  103 #define sigaddset(s, n)         __sigaddset(s, n)
  104 #define sigdelset(s, n)         __sigdelset(s, n)
  105 #define sigismember(s, n)       __sigismember(s, n)
  106 #define sigemptyset(s)          __sigemptyset(s)
  107 #define sigfillset(s)           __sigfillset(s)
  108 #define sigplusset(s, t)        __sigplusset(s, t)
  109 #define sigminusset(s, t)       __sigminusset(s, t)
  110 #endif /* _KERNEL */
  111 
  112 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
  113     defined(_NETBSD_SOURCE)
  114 #include <sys/siginfo.h>
  115 #endif
  116 
  117 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
  118     (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
  119 #include <sys/ucontext.h>
  120 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
  121 
  122 /*
  123  * Signal vector "template" used in sigaction call.
  124  */
  125 struct  sigaction {
  126         union {
  127                 void (*_sa_handler)(int);
  128 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
  129     defined(_NETBSD_SOURCE)
  130                 void (*_sa_sigaction)(int, siginfo_t *, void *);
  131 #endif
  132         } _sa_u;        /* signal handler */
  133         sigset_t sa_mask;               /* signal mask to apply */
  134         int     sa_flags;               /* see signal options below */
  135 };
  136 
  137 #define sa_handler _sa_u._sa_handler
  138 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
  139     defined(_NETBSD_SOURCE)
  140 #define sa_sigaction _sa_u._sa_sigaction
  141 #endif
  142 
  143 #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
  144 
  145 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
  146     (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
  147 #define SA_ONSTACK      0x0001  /* take signal on signal stack */
  148 #define SA_RESTART      0x0002  /* restart system call on signal return */
  149 #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
  150 #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
  151 #endif /* _XOPEN_SOURCE_EXTENDED || XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
  152 /* Only valid for SIGCHLD. */
  153 #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
  154 #define SA_NOCLDWAIT    0x0020  /* do not generate zombies on unwaited child */
  155 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
  156     defined(_NETBSD_SOURCE)
  157 #define SA_SIGINFO      0x0040  /* take sa_sigaction handler */
  158 #endif /* (_POSIX_C_SOURCE - 0) >= 199309L || ... */
  159 #if defined(_NETBSD_SOURCE)
  160 #define SA_NOKERNINFO   0x0080  /* siginfo does not print kernel info on tty */
  161 #endif /*_NETBSD_SOURCE */
  162 #ifdef _KERNEL
  163 #define SA_ALLBITS      0x00ff
  164 #endif
  165 
  166 /*
  167  * Flags for sigprocmask():
  168  */
  169 #define SIG_BLOCK       1       /* block specified signal set */
  170 #define SIG_UNBLOCK     2       /* unblock specified signal set */
  171 #define SIG_SETMASK     3       /* set specified signal set */
  172 
  173 #if defined(_NETBSD_SOURCE)
  174 typedef void (*sig_t)(int);     /* type of signal function */
  175 #endif
  176 
  177 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
  178     (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
  179 /*
  180  * Flags used with stack_t/struct sigaltstack.
  181  */
  182 #define SS_ONSTACK      0x0001  /* take signals on alternate stack */
  183 #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
  184 #ifdef _KERNEL
  185 #define SS_ALLBITS      0x0005
  186 #endif
  187 #define MINSIGSTKSZ     8192                    /* minimum allowable stack */
  188 #define SIGSTKSZ        (MINSIGSTKSZ + 32768)   /* recommended stack size */
  189 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
  190 
  191 #if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
  192     (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
  193 /*
  194  * Structure used in sigstack call.
  195  */
  196 struct  sigstack {
  197         void    *ss_sp;                 /* signal stack pointer */
  198         int     ss_onstack;             /* current status */
  199 };
  200 #endif /* _XOPEN_SOURCE_EXTENDED || _XOPEN_SOURCE >= 500 || _NETBSD_SOURCE */
  201 
  202 #if defined(_NETBSD_SOURCE) && !defined(_KERNEL)
  203 /*
  204  * Macro for converting signal number to a mask suitable for
  205  * sigblock().
  206  */
  207 #define sigmask(n)      __sigmask(n)
  208 
  209 #define BADSIG          SIG_ERR
  210 #endif /* _NETBSD_SOURCE */
  211 
  212 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
  213     defined(_NETBSD_SOURCE)
  214 struct  sigevent {
  215         int     sigev_notify;
  216         int     sigev_signo;
  217         union sigval    sigev_value;
  218         void    (*sigev_notify_function)(union sigval *);
  219         void /* pthread_attr_t */       *sigev_notify_attributes;
  220 };
  221 
  222 #define SIGEV_NONE      0
  223 #define SIGEV_SIGNAL    1
  224 #define SIGEV_THREAD    2
  225 #define SIGEV_SA        3
  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 __END_DECLS
  237 #endif  /* !_SYS_SIGNAL_H_ */

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