php_signal.c

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/*
   +----------------------------------------------------------------------+
   | Copyright (c) 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:           |
   | https://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>                           |
   +----------------------------------------------------------------------+
*/
 
#include "TSRM.h"
#include "php_signal.h"
#include "Zend/zend.h"
#include "Zend/zend_signal.h"
 
/* php_signal using sigaction is derived from Advanced Programming
 * 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 HAVE_STRUCT_SIGINFO_T
    act.sa_sigaction = func;
#else
    act.sa_handler = func;
#endif
    if (mask_all) {
        sigfillset(&act.sa_mask);
    } else {
        sigemptyset(&act.sa_mask);
    }
    act.sa_flags = SA_ONSTACK;
#ifdef HAVE_STRUCT_SIGINFO_T
    act.sa_flags |= SA_SIGINFO;
#endif
    if (!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
    }
    zend_sigaction(signo, &act, &oact);
 
#ifdef HAVE_STRUCT_SIGINFO_T
    return oact.sa_sigaction;
#else
    return oact.sa_handler;
#endif
}
 
Sigfunc *php_signal(int signo, Sigfunc *func, int restart)
{
    return php_signal4(signo, func, restart, 0);
}