bool daemonize( ba::io_service& service )
{
try {
// Inform the io_service that we are about to become a daemon.
service.notify_fork(ba::io_service::fork_prepare);
if( pid_t pid = fork() ) {
if (pid > 0) {
service.notify_fork(ba::io_service::fork_parent);
exit(0);
} else {
sz_log(0, "Daemonize: First fork failed: %s", strerror(errno));
return false;
}
}
setsid();
(void)chdir("/");
umask(0);
service.notify_fork(ba::io_service::fork_prepare);
if( pid_t pid = fork() ) {
if (pid > 0) {
service.notify_fork(ba::io_service::fork_parent);
exit(0);
} else {
sz_log(0, "Daemonize: Second fork failed: %s", strerror(errno));
return false;
}
}
close(0);
close(1);
close(2);
if (open("/dev/null", O_RDONLY) < 0) {
sz_log(0, "Daemonize: Unable to open /dev/null: %s", strerror(errno));
return false;
}
// Inform the io_service that we have finished becoming a daemon.
service.notify_fork(boost::asio::io_service::fork_child);
} catch (std::exception& e) {
sz_log(0, "Daemonize: Exception: %s", e.what());
return false;
}
return true;
}
