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signum.h

/* Copyright (C) 1991, 1993, 1996, 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifdef      _SIGNAL_H

/* Fake signal functions.  */

#define     SIG_ERR      ((__sighandler_t) -1)  /* Error return.  */
#define     SIG_DFL      ((__sighandler_t)  0)  /* Default action.  */
#define     SIG_IGN      ((__sighandler_t)  1)  /* Ignore signal.  */

#ifdef __USE_UNIX98
# define SIG_HOLD ((__sighandler_t)  2)   /* Add signal to hold mask.  */
#endif

/* Signals in the 1-15 range are defined with their historical numbers.
   Signals in the 20-25 range are relatively new and have no ingrained
   numbers. */

/* ANSI signals.  */
#define     SIGINT      2     /* Interactive attention signal.  */
#define     SIGILL      4     /* Illegal instruction.  */
#define     SIGABRT     6     /* Abnormal termination.  */
#define     SIGFPE      8     /* Erroneous arithmetic operation.  */
#define     SIGSEGV     11    /* Invalid access to storage.  */
#define     SIGTERM     15    /* Termination request.  */

/* Historical signals specified by POSIX. */
#define     SIGHUP      1     /* Hangup.  */
#define     SIGQUIT     3     /* Quit.  */
#define     SIGKILL     9     /* Kill (cannot be blocked, caught, or ignored).  */
#define     SIGPIPE     13    /* Broken pipe.  */
#define     SIGALRM     14    /* Alarm clock.  */

/* New(er) POSIX signals. */
#define     SIGSTOP     20    /* Stop (cannot be blocked, caught, or ignored).  */
#define     SIGCONT     21    /* Continue.  */
#define     SIGTSTP     22    /* Keyboard stop.  */
#define     SIGTTIN     23    /* Background read from control terminal.  */
#define     SIGTTOU     24    /* Background write to control terminal.  */
#define     SIGCHLD     25    /* Child terminated or stopped.  */

#define     _NSIG 26

/* Archaic names for compatibility. */
#define     SIGIOT  SIGABRT   /* IOT instruction, abort() on a PDP11 */
#define     SIGCLD  SIGCHLD   /* Old System V name */

#endif      /* <signal.h> included.  */

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