ptg10805159478 Daemon Processes Chapter 13
}
void
sigterm(int signo)
{
syslog(LOG_INFO, "got SIGTERM; exiting");
exit(0);
}void
sighup(int signo)
{
syslog(LOG_INFO, "Re-reading configuration file");
reread();
}
int
main(int argc, char *argv[])
{
char *cmd;
struct sigaction sa;
if ((cmd = strrchr(argv[0], ’/’)) == NULL)
cmd = argv[0];
else
cmd++;/*
*Become a daemon.
*/
daemonize(cmd);
/*
*Make sure only one copy of the daemon is running.
*/
if (already_running()) {
syslog(LOG_ERR, "daemon already running");
exit(1);
}
/*
*Handle signals of interest.
*/
sa.sa_handler = sigterm;
sigemptyset(&sa.sa_mask);
sigaddset(&sa.sa_mask, SIGHUP);
sa.sa_flags = 0;
if (sigaction(SIGTERM, &sa, NULL) < 0) {
syslog(LOG_ERR, "can’t catch SIGTERM: %s", strerror(errno));
exit(1);
}
sa.sa_handler = sighup;
sigemptyset(&sa.sa_mask);