root/pcntl/php_signal.c

DEFINITIONS

1. php_signal4
2. php_signal

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2013 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.txt                                  |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Author: Jason Greene <jason@inetgurus.net>                           |
   +----------------------------------------------------------------------+
*/

/* $Id$ */

#include "TSRM.h"
#include "php_signal.h"
#include "Zend/zend.h"
#include "Zend/zend_signal.h"

/* php_signal using sigaction is derrived from Advanced Programing
 * in the Unix Environment by W. Richard Stevens p 298. */
Sigfunc *php_signal4(int signo, Sigfunc *func, int restart, int mask_all)
{
        struct sigaction act,oact;
#ifdef ZEND_SIGNALS
        TSRMLS_FETCH();
#endif
        act.sa_handler = func;

        if (mask_all) {
                sigfillset(&act.sa_mask);
        } else {
                sigemptyset(&act.sa_mask);
        }
        act.sa_flags = 0;
        if (signo == SIGALRM || (! restart)) {
#ifdef SA_INTERRUPT
                act.sa_flags |= SA_INTERRUPT; /* SunOS */
#endif
        } else {
#ifdef SA_RESTART
                act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */
#endif
        }
#ifdef ZEND_SIGNALS
        if (zend_sigaction(signo, &act, &oact TSRMLS_CC) < 0)
#else
        if (sigaction(signo, &act, &oact) < 0)
#endif
        {
                return SIG_ERR;
        }

        return oact.sa_handler;
}

Sigfunc *php_signal(int signo, Sigfunc *func, int restart)
{
        return php_signal4(signo, func, restart, 0);
}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: noet sw=4 ts=4 fdm=marker
 * vim<600: noet sw=4 ts=4
 */