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

     /*      $OpenBSD: signal.h,v 1.29 2018/04/18 16:05:20 deraadt Exp $     */
     /*      $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $     */
     
     /*
      * Copyright (c) 1982, 1986, 1989, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
     * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)signal.h    8.2 (Berkeley) 1/21/94
     */
    
    #ifndef _SYS_SIGNAL_H_
    #define _SYS_SIGNAL_H_
    
    #include <machine/signal.h>     /* sigcontext; codes for SIGILL, SIGFPE */
    
    #define _NSIG   33              /* counting 0 (mask is 1-32) */
    
    #if __BSD_VISIBLE
    #define NSIG _NSIG
    #endif
    
    #define SIGHUP  1       /* hangup */
    #define SIGINT  2       /* interrupt */
    #define SIGQUIT 3       /* quit */
    #define SIGILL  4       /* illegal instruction (not reset when caught) */
    #define SIGTRAP 5       /* trace trap (not reset when caught) */
    #define SIGABRT 6       /* abort() */
    #if __BSD_VISIBLE
    #define SIGIOT  SIGABRT /* compatibility */
    #define SIGEMT  7       /* EMT instruction */
    #endif
    #define SIGFPE  8       /* floating point exception */
    #define SIGKILL 9       /* kill (cannot be caught or ignored) */
    #define SIGBUS  10      /* bus error */
    #define SIGSEGV 11      /* segmentation violation */
    #define SIGSYS  12      /* bad argument to system call */
    #define SIGPIPE 13      /* write on a pipe with no one to read it */
    #define SIGALRM 14      /* alarm clock */
    #define SIGTERM 15      /* software termination signal from kill */
    #define SIGURG  16      /* urgent condition on IO channel */
    #define SIGSTOP 17      /* sendable stop signal not from tty */
    #define SIGTSTP 18      /* stop signal from tty */
    #define SIGCONT 19      /* continue a stopped process */
    #define SIGCHLD 20      /* to parent on child stop or exit */
    #define SIGTTIN 21      /* to readers pgrp upon background tty read */
    #define SIGTTOU 22      /* like TTIN for output if (tp->t_local&LTOSTOP) */
    #if __BSD_VISIBLE
    #define SIGIO   23      /* input/output possible signal */
    #endif
    #define SIGXCPU 24      /* exceeded CPU time limit */
    #define SIGXFSZ 25      /* exceeded file size limit */
    #define SIGVTALRM 26    /* virtual time alarm */
    #define SIGPROF 27      /* profiling time alarm */
    #if __BSD_VISIBLE
    #define SIGWINCH 28     /* window size changes */
    #define SIGINFO 29      /* information request */
    #endif
    #define SIGUSR1 30      /* user defined signal 1 */
    #define SIGUSR2 31      /* user defined signal 2 */
    #if __BSD_VISIBLE
    #define SIGTHR  32      /* thread library AST */
    #endif
    
    /*
     * Language spec says we must list exactly one parameter, even though we
     * actually supply three.  Ugh!
     */
    #define SIG_DFL         (void (*)(int))0
    #define SIG_IGN         (void (*)(int))1
    #define SIG_ERR         (void (*)(int))-1
   
   #if __POSIX_VISIBLE || __XPG_VISIBLE
   #ifndef _SIGSET_T_DEFINED_
   #define _SIGSET_T_DEFINED_
   typedef unsigned int sigset_t;
   #endif
   
   #include <sys/siginfo.h>
   
   /*
    * Signal vector "template" used in sigaction call.
    */
   struct  sigaction {
           union {         /* signal handler */
                   void    (*__sa_handler)(int);
                   void    (*__sa_sigaction)(int, siginfo_t *, void *);
           } __sigaction_u;
           sigset_t sa_mask;               /* signal mask to apply */
           int     sa_flags;               /* see signal options below */
   };
   
   /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
   #define sa_handler      __sigaction_u.__sa_handler
   #define sa_sigaction    __sigaction_u.__sa_sigaction
   
   #if __XPG_VISIBLE >= 500
   #define SA_ONSTACK      0x0001  /* take signal on signal stack */
   #define SA_RESTART      0x0002  /* restart system on signal return */
   #define SA_RESETHAND    0x0004  /* reset to SIG_DFL when taking signal */
   #define SA_NODEFER      0x0010  /* don't mask the signal we're delivering */
   #define SA_NOCLDWAIT    0x0020  /* don't create zombies (assign to pid 1) */
   #endif /* __XPG_VISIBLE >= 500 */
   #define SA_NOCLDSTOP    0x0008  /* do not generate SIGCHLD on child stop */
   #if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
   #define SA_SIGINFO      0x0040  /* generate siginfo_t */
   #endif
   
   /*
    * Flags for sigprocmask:
    */
   #define SIG_BLOCK       1       /* block specified signal set */
   #define SIG_UNBLOCK     2       /* unblock specified signal set */
   #define SIG_SETMASK     3       /* set specified signal set */
   #endif  /* __POSIX_VISIBLE || __XPG_VISIBLE */
   
   #if __BSD_VISIBLE
   typedef void (*sig_t)(int);     /* type of signal function */
   
   /*
    * 4.3 compatibility:
    * Signal vector "template" used in sigvec call.
    */
   struct  sigvec {
           void    (*sv_handler)(int);     /* signal handler */
           int     sv_mask;                /* signal mask to apply */
           int     sv_flags;               /* see signal options below */
   };
   #define SV_ONSTACK      SA_ONSTACK
   #define SV_INTERRUPT    SA_RESTART      /* same bit, opposite sense */
   #define SV_RESETHAND    SA_RESETHAND
   #define sv_onstack      sv_flags        /* isn't compatibility wonderful! */
   
   /*
    * Macro for converting signal number to a mask suitable for
    * sigblock().
    */
   #define sigmask(m)      (1U << ((m)-1))
   
   #define BADSIG          SIG_ERR
   
   #endif  /* __BSD_VISIBLE */
   
   #if __BSD_VISIBLE || __XPG_VISIBLE >= 420
   /*
    * Structure used in sigaltstack call.
    */
   typedef struct sigaltstack {
           void    *ss_sp;                 /* signal stack base */
           size_t  ss_size;                /* signal stack length */
           int     ss_flags;               /* SS_DISABLE and/or SS_ONSTACK */
   } stack_t;
   #define SS_ONSTACK      0x0001  /* take signals on alternate stack */
   #define SS_DISABLE      0x0004  /* disable taking signals on alternate stack */
   #define MINSIGSTKSZ     (3U << _MAX_PAGE_SHIFT) /* minimum allowable stack */
   #if _MAX_PAGE_SHIFT < 14                        /* recommended stack size */
   #define SIGSTKSZ        (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 4)
   #else
   #define SIGSTKSZ        (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 2)
   #endif
   
   typedef struct sigcontext ucontext_t;
   #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
   
   #ifndef _KERNEL
   /*
    * For historical reasons; programs expect signal's return value to be
    * defined by <sys/signal.h>.
    */
   __BEGIN_DECLS
   void    (*signal(int, void (*)(int)))(int);
   __END_DECLS
   #endif /* !_KERNEL */
   #endif  /* !_SYS_SIGNAL_H_ */

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