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/*
* mpc123 - Musepack Console audio player
* Copyright (C) 2006-2008 Daniele Sempione <scrows at oziosi.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdio.h>
#include <signal.h>
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <execinfo.h>
#include "mpc123.h"
struct sigaction mpc123_signals;
sigset_t mpc123_sigset;
struct timeval tlast, tnew;
int handled_signals[]={
SIGSEGV, /* mem problems */
SIGFPE, /* math problems */
SIGILL, /* function pointer problems */
SIGINT, /* play next song */
0 /* terminator */
};
int mpc123_setsigh(int currsig) {
sigintr:
if(sigaction(currsig, &mpc123_signals, NULL) == -1) {
if(errno == EINTR)
goto sigintr;
else
return 1;
}
return 0;
}
void mpc123_initsigh(void) {
int i;
gettimeofday(&tlast, NULL);
mpc123_signals.sa_handler = signal_handler;
mpc123_signals.sa_flags = 0;
sigemptyset(&mpc123_signals.sa_mask);
sigemptyset(&mpc123_sigset);
sigaddset(&mpc123_sigset, SIGINT);
for(i=0; handled_signals[i]; i++)
if(mpc123_setsigh(handled_signals[i]))
sayf(0, "Can't handle %s. errno [%d]\n", strsignal(handled_signals[i]), errno);
}
/* who needs more backtrace symbols ? */
#ifdef DEBUG
# define MPC123_BT_SYMBOLS 50
#else
# define MPC123_BT_SYMBOLS 10
#endif
void signal_handler(int signo){
void * ary[MPC123_BT_SYMBOLS];
char ** strings;
int i=0, size=0;
switch(signo){
case SIGINT:
sigprocmask(SIG_BLOCK, &mpc123_sigset, NULL);
gettimeofday(&tnew, NULL);
if(((tnew.tv_sec - tlast.tv_sec) * 1000000 +
(tnew.tv_usec - tlast.tv_usec)) < 700000)
mpc123_flag_set(MPC123_FL_STOP);
else
mpc123_flag_set(MPC123_FL_PLAYNEXT);
tlast.tv_sec = tnew.tv_sec;
tlast.tv_usec = tnew.tv_usec;
sigprocmask(SIG_UNBLOCK, &mpc123_sigset, NULL);
break;
case SIGSEGV:
say(0, "Segmentation Fault. Backtrace follows.\n"
"NOTE: if you didn't compile with ``make DEBUG=1'', then\n"
" * this info is probably mostly useless;\n"
" * recompile with debug activated and try to crash\n"
" * mpc123 again :)\n\n");
size=backtrace(ary, MPC123_BT_SYMBOLS);
strings=backtrace_symbols(ary, size);
if(!strings) /* unlikely */
return;
for(i=0; i < size; i++){
sayf(0, "%2d: %s\n", i, strings[i]);
}
free(strings);
fprintf(stderr, "Aborting\n");
abort();
break; /* useless, anyway */
/* XXX: case SIGFPE SIGILL ?? */
default:
/* .. */
break;
}
}
/* vim:ft=c:tw=78:ts=2:et:cin:
*/
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