ap_signal.c

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
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 * modification, are permitted provided that the following conditions
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 *        Apache Software Foundation (http://www.apache.org/)."
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * .
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 */

#include "httpd.h"

#ifndef NO_USE_SIGACTION
/*
 * Replace standard signal() with the more reliable sigaction equivalent
 * from W. Richard Stevens' "Advanced Programming in the UNIX Environment"
 * (the version that does not automatically restart system calls).
 */
Sigfunc *signal(int signo, Sigfunc * func)
{
    struct sigaction act, oact;

    act.sa_handler = func;
    sigemptyset(&act.sa_mask);
    act.sa_flags = 0;
#ifdef  SA_INTERRUPT		/* SunOS */
    act.sa_flags |= SA_INTERRUPT;
#endif
    if (sigaction(signo, &act, &oact) < 0)
	return SIG_ERR;
    return oact.sa_handler;
}
#else
/* need some function in this file, otherwise the linker on NeXT bitches */
void ap_signal_is_not_here(void) {}
#endif