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/* $Header: /home/yav/catty/fkiss/RCS/bg.c,v 1.10 2000/08/25 06:50:36 yav Exp $
* fkiss background task and signal handling
* written by yav <yav@bigfoot.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
char id_bg[] = "$Id: bg.c,v 1.10 2000/08/25 06:50:36 yav Exp $";
#include <X11/Xlib.h>
#include <X11/Xos.h>
#include <stdio.h>
#include "config.h"
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include "headers.h"
#include "fkiss.h"
#include "work.h"
#define PUBLIC_BG_C
#include "extern.h"
/* for System V signal symbol */
#ifndef SIGCHLD
#define SIGCHLD SIGCLD
#endif
static FILE *bgfp = NULL;
static char sound_mark[] = "**sound";
static char play_command[] = "play";
static char shell_command[] = "/bin/sh";
RETSIGTYPE sigchld_handler()
{
wait(NULL);
signal(SIGCHLD, sigchld_handler); /* reset signal handler for SysV */
}
void bg_child()
{
FILE *fp;
int i, s, sound_mark_len;
char *p;
char buf[256];
signal(SIGCHLD, sigchld_handler);
sound_mark_len = strlen(sound_mark);
fp = fdopen(0, "r");
while (fgets(buf, sizeof(buf), fp) != NULL) {
cut_crlf(buf);
if (debug_mode)
fprintf(stderr, "Background:%s\n", buf);
p = buf;
s = 0;
if (strncmp(p, sound_mark, sound_mark_len) == 0) {
p += sound_mark_len + 1; /* skip sound_mark + ' ' */
s = 1;
}
if (fork() == 0) {
/* child process */
switch(s) {
case 1: /* Sound function */
if (sound_mode & 1) {
/* internal sound routine */
i = sound_play(p);
switch (i) {
case 0: /* no error */
exit(0);
case 1: /* sound file open error */
msg("W sound file ``%s'' open error.\n", p);
break;
case 2: /* device open error */
msg("W sound device ``%s'' open error.\n", sound_device);
break;
case 3: /* Not supported format */
msg("W ``%s'' not supported sound format.\n", p);
break;
default:
msg("W unknown sound error (%d)!?\n", i);
break;
}
} else {
execlp(play_command, play_command, p, NULL);
/* play_command exec failed, try shell_command */
execlp(shell_command, shell_command, play_command, p, NULL);
/* shell_command exec failed */
}
break;
default: /* Other function */
system(p);
exit(0);
}
exit(1); /* exec failed */
}
}
exit(0);
}
/* fork background process */
int background()
{
int i;
int pfd[2];
if (pipe(pfd) < 0)
return -1; /* pipe open failed */
i = fork();
if (i < 0)
return -1; /* fork failed */
if (i == 0) {
/* child */
close(0);
dup(pfd[0]);
close(pfd[0]);
close(pfd[1]);
bg_child();
/* NOT REACHED */
}
/* parent */
close(pfd[0]);
bgfp = fdopen(pfd[1], "w");
return 0;
}
int bg_shell(str)
char *str;
{
if (bgfp != NULL) {
fprintf(bgfp, "%s\n", str);
fflush(bgfp);
}
return 0;
}
int bg_play(name)
char *name;
{
if (sound_mode && bgfp != NULL) {
fprintf(bgfp, "%s %s\n", sound_mark, name);
fflush(bgfp);
}
return 0;
}
void bg_exit()
{
if (bgfp != NULL) {
fclose(bgfp);
bgfp = NULL;
wait(NULL);
}
}
RETSIGTYPE signal_handler(sig)
int sig;
{
signal(sig, SIG_IGN); /* for SysV */
if (debug_mode)
printf("fkiss: signal %d!\n", sig);
kiss_exit(1);
}
void setup_signal_handler()
{
int i;
static int trap_signals[] = {
SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGTERM,
#ifdef SIGXCPU
SIGXCPU,
#endif
#ifdef SIGXFSZ
SIGXFSZ,
#endif
0
};
for (i = 0; trap_signals[i]; i++) {
/* Don't trap already ignored signals */
if (signal(trap_signals[i], SIG_IGN) != SIG_IGN)
signal(trap_signals[i], signal_handler);
}
}
/* End of file */
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