/*
 *****************************************************************************
 *
 *	$RCSfile: sigstuff.h,v $
 *	$Date: 1998/05/01 16:23:21 $
 *	$Source: /home/richard/Xml/RCS/sigstuff.h,v $
 *	$Revision: 1.2 $
 *	$Author: richard $
 *
 *****************************************************************************
 *
 *  Copyright 1998, Brown University and Richard Goerwitz
 *
 *****************************************************************************
 */

#ifndef SIGSTUFF_H_INCLUDED
#define SIGSTUFF_H_INCLUDED

#include "general.h"
#include <signal.h>

#ifndef SIGCHLD
# define SIGCHLD SIGCLD
#endif

#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifndef WEXITSTATUS
# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
#endif
#ifndef WIFEXITED
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
#endif

/* install handler for SIGCHLD; see also sig_ignore() below */
void catch_sigchld (RETSIGTYPE (*)(int));

/* blocks SIGINT while SIGTERM is being handled and vice versa */
void catch_sigint_and_sigterm (RETSIGTYPE (*)(int));

/* works like sigset() or signal() */
void sig_catch (int sig, RETSIGTYPE (*)(int));
#ifdef SA_RESTART
void sig_catch_no_restart (int sig, RETSIGTYPE (*)(int));
#else
# define sig_catch_no_restart	sig_catch
#endif

/* like signal(sig, SIG_IGN), but with special handling of SIGCHLD */
void sig_ignore (int);

/* reset signal handler for sig to default */
void sig_default (int);

/* like the SYSV sighold() and sigrelse() functions */
void sig_hold (int);
void sig_release (int);

#endif /* SIGSTUFF_H_INCLUDED */