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[gapil.git] / sources / SigHand.c

diff --git a/sources/SigHand.c b/sources/SigHand.c
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-/* SigHand.c
- * 
- * Copyright (C) 2002 Simone Piccardi
- * 
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
- * 
- * This program 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
- * General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-/*****************************************************************************
- *
- * File SigHand.c: define a set of functions for signal manipulation 
- *
- * Author: S. Piccardi Dec. 2002
- *
- * $Id: SigHand.c,v 1.3 2002/12/11 00:51:38 piccardi Exp $
- *
- *****************************************************************************/
-#include <errno.h>                               /* error simbol definitions */
-#include <stdio.h>                                 /* standard I/O functions */
-#include <signal.h>                          /* signal handling declarations */
-#include <sys/types.h>
-#include <sys/wait.h>
-
-#include "Gapil.h"
-#include "macros.h"
-
-/*
- * Function Signal
- * Initialize a signal handler.
- * To enable the signal handling a process we need to tell it to
- * kernel; this is done writing all needed info to a sigaction structure
- * named sigact, and then callind sigaction() system call passing the
- * information stored in the sigact structure variable.
- *
- * Input:  the signal to handle 
- *         the signal handler function
- * Return: the previous sigaction structure
- */
-inline SigFunc * Signal(int signo, SigFunc *func) 
-{
-    struct sigaction new_handl, old_handl;
-    new_handl.sa_handler = func;                      /* set signal handler */
-    /* clear signal mask: no signal blocked during execution of func */
-    if (sigemptyset(&new_handl.sa_mask)!=0){       /* initialize signal set */
-        return SIG_ERR;
-    }
-    new_handl.sa_flags=0;                            /* init to 0 all flags */
-    /* change action for signo signal */
-    if (sigaction(signo,&new_handl,&old_handl)){ 
-        return SIG_ERR;
-    }
-    return (old_handl.sa_handler);
-}
-/* 
- * Functions: HandSigCHLD
- * Generic handler for SIGCHLD signal
- * 
- * Simone Piccardi Dec. 2002
- * $Id: SigHand.c,v 1.3 2002/12/11 00:51:38 piccardi Exp $
- */
-void HandSigCHLD(int sig)
-{
-    int errno_save;
-    int status;
-    pid_t pid;
-    /* save errno current value */
-    errno_save = errno;
-    /* loop until no */
-    do {
-       errno = 0;
-       pid = waitpid(WAIT_ANY, &status, WNOHANG);
-       if (pid > 0) {
-           debug("child %d terminated with status %x\n", pid, status);
-       }
-    } while ((pid > 0) && (errno == EINTR));
-    /* restore errno value*/
-    errno = errno_save;
-    /* return */
-    return;
-}