blob: 2141269b10f3cfa6e5c578968448ffe62af03583 (
plain) (
tree)
|
|
/*
* signal(2) - Install signal handler
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <signal.h>
#include <errno.h>
typedef void (*sighandler_t)(int);
sighandler_t signal(
int signum,
sighandler_t handler
)
{
struct sigaction s;
struct sigaction old;
s.sa_handler = handler ;
sigemptyset(&s.sa_mask);
/*
* Depending on which system we want to behave like, one of
* the following versions should be chosen.
*/
/* #define signal_like_linux */
#if defined(signal_like_linux)
s.sa_flags = SA_RESTART | SA_INTERRUPT | SA_NOMASK;
s.sa_restorer= NULL ;
#elif defined(signal_like_SVR4)
s.sa_flags = SA_RESTART;
#else
s.sa_flags = 0;
#endif
sigaction( signum, &s, &old );
return (sighandler_t) old.sa_handler;
}
|