void enable_interrupts( void )
{
if( --mutex <= 0 )
{
mutex = 0;
if( sighup_pending ) sighup_handler( SIGHUP );
if( sigint_pending ) sigint_handler( SIGINT );
}
}
/**************************
*** Logging management ***
**************************/
void logging_init() {
/* Set the default handler */
g_log_set_default_handler(spop_log_handler, NULL);
/* Open the log file */
g_log_file_path = config_get_string_opt("log_file", "/var/log/spopd.log");
if (strlen(g_log_file_path) > 0) {
/* Install a handler so that we can reopen the file on SIGHUP */
if (signal(SIGHUP, sighup_handler) == SIG_ERR)
g_error("Can't install signal handler: %s", g_strerror(errno));
/* And open the file using this handler :) */
sighup_handler(0);
}
}
/* #### sigcontext doesn't exist in Solaris. This should be updated
to be correct for Solaris. */
static SIGTYPE
sighandler (int sig)
{
if (audio_fd > 0)
{
reset_device (0);
close (audio_fd);
}
if (sig == SIGHUP && sighup_handler)
sighup_handler (sig);
else if (sig == SIGINT && sigint_handler)
sigint_handler (sig);
else
exit (1);
}
/* Intercept SIGINT and SIGHUP in order to close the audio and mixer
devices before terminating sound output; this requires reliable
signals as provided by "syssignal.h" */
static SIGTYPE
sighandler (int sig)
{
if (mix_fd > 0) {
if (audio_vol >= 0) {
ioctl(mix_fd,SOUND_MIXER_WRITE_PCM,&audio_vol);
audio_vol = -1; }
if (mix_fd != audio_fd)
close(mix_fd);
mix_fd = -1; }
if (audio_fd > 0) {
ioctl(audio_fd,SNDCTL_DSP_SYNC,NULL);
ioctl(audio_fd,SNDCTL_DSP_RESET,NULL);
close(audio_fd);
audio_fd = -1; }
if (sig == SIGHUP && sighup_handler) sighup_handler(sig);
else if (sig == SIGINT && sigint_handler) sigint_handler(sig);
else exit(1);
}
int
main(int argc, char **argv)
{
int option;
while ((option = getopt(argc, argv, "ace:fhlnr:s:u:zLK:O:S:")) != -1) {
switch (option) {
case 'a':
slflags |= IFF_LINK2;
slflags &= ~IFF_LINK0;
break;
case 'c':
slflags |= IFF_LINK0;
slflags &= ~IFF_LINK2;
break;
case 'e':
exit_cmd = (char*) strdup (optarg);
break;
case 'f':
foreground = 1;
break;
case 'h':
flow_control |= CRTSCTS;
break;
case 'l':
modem_control = CLOCAL; /* clear HUPCL too */
break;
case 'n':
slflags |= IFF_LINK1;
break;
case 'r':
redial_cmd = (char*) strdup (optarg);
break;
case 's':
speed = atoi(optarg);
break;
case 'u':
config_cmd = (char*) strdup (optarg);
break;
case 'z':
redial_on_startup = 1;
break;
case 'L':
uucp_lock = 1;
break;
case 'K':
keepal = atoi(optarg);
break;
case 'O':
outfill = atoi(optarg);
break;
case 'S':
sl_unit = atoi(optarg);
break;
case '?':
default:
usage();
exit_handler(1);
}
}
if (optind == argc - 1)
dev = argv[optind];
if (optind < (argc - 1))
warnx("too many args, first='%s'", argv[optind]);
if (optind > (argc - 1))
warnx("not enough args");
if (dev == NULL) {
usage();
exit_handler(2);
}
if (strncmp(_PATH_DEV, dev, sizeof(_PATH_DEV) - 1)) {
strcpy(tty_path, _PATH_DEV);
strcat(tty_path, "/");
strncat(tty_path, dev, 10);
dev = tty_path;
}
dvname = strrchr(dev, '/'); /* always succeeds */
dvname++; /* trailing tty pathname component */
snprintf(pidfilename, sizeof(pidfilename),
"%sslattach.%s.pid", _PATH_VARRUN, dvname);
printf("%s\n",pidfilename);
if (!foreground)
daemon(0,0); /* fork, setsid, chdir /, and close std*. */
/* daemon() closed stderr, so log errors from here on. */
openlog("slattach",LOG_CONS|LOG_PID,LOG_DAEMON);
acquire_line(); /* get tty device as controlling terminal */
setup_line(0); /* configure for slip line discipline */
slip_discipline(); /* switch to slip line discipline */
/* upon INT log a timestamp and exit. */
if (signal(SIGINT,sigint_handler) == SIG_ERR)
syslog(LOG_NOTICE,"cannot install SIGINT handler: %m");
/* upon TERM log a timestamp and exit. */
if (signal(SIGTERM,sigterm_handler) == SIG_ERR)
syslog(LOG_NOTICE,"cannot install SIGTERM handler: %m");
/* upon HUP redial and reconnect. */
if (signal(SIGHUP,sighup_handler) == SIG_ERR)
syslog(LOG_NOTICE,"cannot install SIGHUP handler: %m");
if (redial_on_startup)
sighup_handler(0);
else if (!(modem_control & CLOCAL)) {
if (ioctl(fd, TIOCMGET, &comstate) < 0)
syslog(LOG_NOTICE,"cannot get carrier state: %m");
if (!(comstate & TIOCM_CD)) { /* check for carrier */
/* force a redial if no carrier */
kill (getpid(), SIGHUP);
} else
configure_network();
} else
configure_network(); /* configure the network if needed. */
for (;;) {
sigset_t mask;
sigemptyset(&mask);
sigsuspend(&mask);
}
}