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SDL_fatal.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@devolution.com
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/* General fatal signal handling code for SDL */
#ifdef NO_SIGNAL_H
/* No signals on this platform, nothing to do.. */
void SDL_InstallParachute(void)
{
return;
}
void SDL_UninstallParachute(void)
{
return;
}
#else
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include "SDL.h"
#include "SDL_fatal.h"
/* This installs some signal handlers for the more common fatal signals,
so that if the programmer is lazy, the app doesn't die so horribly if
the program crashes.
*/
static void SDL_Parachute(int sig)
{
signal(sig, SIG_DFL);
fprintf(stderr, "Fatal signal: ");
switch (sig) {
case SIGSEGV:
fprintf(stderr, "Segmentation Fault");
break;
#ifdef SIGBUS
#if SIGBUS != SIGSEGV
case SIGBUS:
fprintf(stderr, "Bus Error");
break;
#endif
#endif /* SIGBUS */
#ifdef SIGFPE
case SIGFPE:
fprintf(stderr, "Floating Point Exception");
break;
#endif /* SIGFPE */
#ifdef SIGQUIT
case SIGQUIT:
fprintf(stderr, "Keyboard Quit");
break;
#endif /* SIGQUIT */
#ifdef SIGPIPE
case SIGPIPE:
fprintf(stderr, "Broken Pipe");
break;
#endif /* SIGPIPE */
default:
fprintf(stderr, "# %d", sig);
break;
}
fprintf(stderr, " (SDL Parachute Deployed)\n");
SDL_Quit();
exit(-sig);
}
static int SDL_fatal_signals[] = {
SIGSEGV,
#ifdef SIGBUS
SIGBUS,
#endif
#ifdef SIGFPE
SIGFPE,
#endif
#ifdef SIGQUIT
SIGQUIT,
#endif
#ifdef SIGPIPE
SIGPIPE,
#endif
0
};
void SDL_InstallParachute(void)
{
int i;
void (*ohandler)(int);
/* Set a handler for any fatal signal not already handled */
for ( i=0; SDL_fatal_signals[i]; ++i ) {
ohandler = signal(SDL_fatal_signals[i], SDL_Parachute);
if ( ohandler != SIG_DFL ) {
signal(SDL_fatal_signals[i], ohandler);
}
}
#ifdef SIGALRM
/* Set SIGALRM to be ignored -- necessary on Solaris */
{
struct sigaction action, oaction;
/* Set SIG_IGN action */
memset(&action, 0, (sizeof action));
action.sa_handler = SIG_IGN;
sigaction(SIGALRM, &action, &oaction);
/* Reset original action if it was already being handled */
if ( oaction.sa_handler != SIG_DFL ) {
sigaction(SIGALRM, &oaction, NULL);
}
}
#endif
return;
}
void SDL_UninstallParachute(void)
{
int i;
void (*ohandler)(int);
/* Remove a handler for any fatal signal handled */
for ( i=0; SDL_fatal_signals[i]; ++i ) {
ohandler = signal(SDL_fatal_signals[i], SIG_DFL);
if ( ohandler != SDL_Parachute ) {
signal(SDL_fatal_signals[i], ohandler);
}
}
}
#endif /* NO_SIGNAL_H */