int main(int argc, char **argv) {
// temporarily set the syslog facilty to main and init it
setup_syslog(LOG_USER, 0);
// Parse the command line
char *config_file = NULL;
int parse_res = parse_cmd_line_args(argc, argv, &config_file);
if (parse_res) return 1;
// Parse the config file
statsite_config *config = alloc_config();
int config_res = config_from_filename(config_file, config);
if (config_res != 0) {
syslog(LOG_ERR, "Failed to read the configuration file!");
return 1;
}
// Validate the config file
if (validate_config(config)) {
syslog(LOG_ERR, "Invalid configuration!");
return 1;
}
// close the initial syslog
closelog();
// Initialize syslog with configured facility
setup_syslog(config->syslog_log_facility, config->daemonize);
// Set prefixes for each message type
if (prepare_prefixes(config)) {
syslog(LOG_ERR, "Failed to get prefixes!");
return 1;
}
// Build the prefix tree
if (build_prefix_tree(config)) {
syslog(LOG_ERR, "Failed to build prefix tree!");
return 1;
}
// Set the syslog mask
setlogmask(config->syslog_log_level);
// Initialize libcurl
curl_global_init(CURL_GLOBAL_DEFAULT);
// Daemonize
if (config->daemonize) {
pid_t pid, sid;
int fd;
syslog(LOG_INFO, "Daemonizing.");
pid = fork();
// Exit if we failed to fork
if (pid < 0) {
syslog(LOG_ERR, "Failed to fork() daemon!");
return 1;
}
// Parent process returns
if (pid) return 0;
// Create a new session
sid = setsid();
if (sid < 0) {
syslog(LOG_ERR, "Failed to set daemon SID!");
return 1;
}
int write_pidfile_res = write_pidfile(config->pid_file, sid);
if (write_pidfile_res) {
syslog(LOG_ERR, "Failed to write pidfile. Terminating.");
return 1;
}
if ((fd = open("/dev/null", O_RDWR, 0)) != -1) {
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
if (fd > STDERR_FILENO) close(fd);
}
}
// Log that we are starting up
syslog(LOG_INFO, "Starting statsite.");
// Build the sinks
sink* sinks = NULL;
init_sinks(&sinks, config);
// Initialize the networking
statsite_networking *netconf = NULL;
int net_res = init_networking(config, &netconf, sinks);
if (net_res != 0) {
syslog(LOG_ERR, "Failed to initialize networking!");
return 1;
}
// Setup signal handlers
signal(SIGPIPE, SIG_IGN); // Ignore SIG_IGN
signal(SIGHUP, SIG_IGN); // Ignore SIG_IGN
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
// Join the networking loop, blocks until exit
enter_networking_loop(netconf, &SIGNUM);
if (SIGNUM != 0) {
syslog(LOG_WARNING, "Received signal [%s]! Exiting...", strsignal(SIGNUM));
}
// Begin the shutdown/cleanup
shutdown_networking(netconf);
// Do the final flush
final_flush(sinks);
// If daemonized, remove the pid file
if (config->daemonize && unlink(config->pid_file)) {
syslog(LOG_ERR, "Failed to delete pid file!");
}
// Free our memory
free_config(config);
// Tear down libcurl
curl_global_cleanup();
// Done
return 0;
}
int
load_config (char * file)
{
if (!conf)
conf = alloc_config();
if (!conf)
return 1;
/*
* internal defaults
*/
if (!conf->verbosity)
conf->verbosity = DEFAULT_VERBOSITY;
conf->udev = udev_new();
dm_drv_version(conf->version, TGT_MPATH);
conf->dev_type = DEV_NONE;
conf->minio = DEFAULT_MINIO;
conf->minio_rq = DEFAULT_MINIO_RQ;
get_sys_max_fds(&conf->max_fds);
conf->bindings_file = set_default(DEFAULT_BINDINGS_FILE);
conf->wwids_file = set_default(DEFAULT_WWIDS_FILE);
conf->bindings_read_only = 0;
conf->multipath_dir = set_default(DEFAULT_MULTIPATHDIR);
conf->features = set_default(DEFAULT_FEATURES);
conf->flush_on_last_del = 0;
conf->attribute_flags = 0;
conf->reassign_maps = DEFAULT_REASSIGN_MAPS;
conf->checkint = DEFAULT_CHECKINT;
conf->max_checkint = MAX_CHECKINT(conf->checkint);
conf->fast_io_fail = DEFAULT_FAST_IO_FAIL;
conf->retain_hwhandler = DEFAULT_RETAIN_HWHANDLER;
conf->detect_prio = DEFAULT_DETECT_PRIO;
/*
* preload default hwtable
*/
if (conf->hwtable == NULL) {
conf->hwtable = vector_alloc();
if (!conf->hwtable)
goto out;
}
if (setup_default_hwtable(conf->hwtable))
goto out;
/*
* read the config file
*/
set_current_keywords(&conf->keywords);
alloc_keywords();
if (filepresent(file)) {
int builtin_hwtable_size;
builtin_hwtable_size = VECTOR_SIZE(conf->hwtable);
if (init_data(file, init_keywords)) {
condlog(0, "error parsing config file");
goto out;
}
if (VECTOR_SIZE(conf->hwtable) > builtin_hwtable_size) {
/*
* remove duplica in hwtable. config file
* takes precedence over build-in hwtable
*/
factorize_hwtable(conf->hwtable, builtin_hwtable_size);
}
} else {
init_keywords();
}
/*
* fill the voids left in the config file
*/
if (conf->blist_devnode == NULL) {
conf->blist_devnode = vector_alloc();
if (!conf->blist_devnode)
goto out;
}
if (conf->blist_wwid == NULL) {
conf->blist_wwid = vector_alloc();
if (!conf->blist_wwid)
goto out;
}
if (conf->blist_device == NULL) {
conf->blist_device = vector_alloc();
if (!conf->blist_device)
goto out;
}
if (setup_default_blist(conf))
goto out;
if (conf->elist_devnode == NULL) {
conf->elist_devnode = vector_alloc();
if (!conf->elist_devnode)
goto out;
}
if (conf->elist_wwid == NULL) {
conf->elist_wwid = vector_alloc();
if (!conf->elist_wwid)
goto out;
}
if (conf->elist_device == NULL) {
conf->elist_device = vector_alloc();
if (!conf->elist_device)
goto out;
}
if (conf->mptable == NULL) {
conf->mptable = vector_alloc();
if (!conf->mptable)
goto out;
}
if (conf->bindings_file == NULL)
conf->bindings_file = set_default(DEFAULT_BINDINGS_FILE);
if (!conf->multipath_dir || !conf->bindings_file ||
!conf->wwids_file)
goto out;
return 0;
out:
free_config(conf);
return 1;
}