int main(int argc, char **argv) {
int fd, lockfd = -1;
char lockfile[PATH_MAX];
char user[32], group[32];
char *trace_dir = NULL;
parse_clargs(argc, argv);
noit_log_init();
noit_log_stream_add_stream(noit_debug, noit_stderr);
noit_log_stream_add_stream(noit_error, noit_stderr);
/* Next load the configs */
noit_conf_init(APPNAME);
if(noit_conf_load(config_file) == -1) {
fprintf(stderr, "Cannot load config: '%s'\n", config_file);
exit(-1);
}
/* Reinitialize the logging system now that we have a config */
snprintf(user, sizeof(user), "%d", getuid());
snprintf(group, sizeof(group), "%d", getgid());
if(noit_security_usergroup(droptouser, droptogroup, noit_true)) {
noitL(noit_stderr, "Failed to drop privileges, exiting.\n");
exit(-1);
}
noit_conf_log_init(APPNAME);
cli_log_switches();
if(noit_security_usergroup(user, group, noit_true)) {
noitL(noit_stderr, "Failed to regain privileges, exiting.\n");
exit(-1);
}
if(debug)
noit_debug->enabled = 1;
if(!glider) noit_conf_get_string(NULL, "/" APPNAME "/watchdog/@glider", &glider);
noit_watchdog_glider(glider);
noit_conf_get_string(NULL, "/" APPNAME "/watchdog/@tracedir", &trace_dir);
if(trace_dir) noit_watchdog_glider_trace_dir(trace_dir);
if(chdir("/") != 0) {
fprintf(stderr, "cannot chdir(\"/\"): %s\n", strerror(errno));
exit(2);
}
noit_watchdog_prefork_init();
/* Acquire the lock so that we can throw an error if it doesn't work.
* If we've started -D, we'll have the lock.
* If not we will daemon and must reacquire the lock.
*/
lockfd = -1;
lockfile[0] = '\0';
if(noit_conf_get_stringbuf(NULL, "/" APPNAME "/@lockfile",
lockfile, sizeof(lockfile))) {
if((lockfd = noit_lockfile_acquire(lockfile)) < 0) {
noitL(noit_stderr, "Failed to acquire lock: %s\n", lockfile);
exit(-1);
}
}
if(foreground) exit(child_main());
/* This isn't inherited across forks... */
if(lockfd >= 0) noit_lockfile_release(lockfd);
fd = open("/dev/null", O_RDWR);
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
if(fork()) exit(0);
setsid();
if(fork()) exit(0);
/* Reacquire the lock */
if(*lockfile) {
if(noit_lockfile_acquire(lockfile) < 0) {
noitL(noit_stderr, "Failed to acquire lock: %s\n", lockfile);
exit(-1);
}
}
return noit_watchdog_start_child("stratcond", child_main, 0);
}
int
noit_main(const char *appname,
const char *config_filename, int debug, int foreground,
const char *_glider,
const char *drop_to_user, const char *drop_to_group,
int (*passed_child_main)(void)) {
int fd, lockfd, watchdog_timeout = 0;
char conf_str[1024];
char lockfile[PATH_MAX];
char user[32], group[32];
char *trace_dir = NULL;
char appscratch[1024];
char *glider = (char *)_glider;
char *watchdog_timeout_str;
/* First initialize logging, so we can log errors */
noit_log_init();
noit_log_stream_add_stream(noit_debug, noit_stderr);
noit_log_stream_add_stream(noit_error, noit_stderr);
/* Next load the configs */
noit_conf_init(appname);
if(noit_conf_load(config_filename) == -1) {
fprintf(stderr, "Cannot load config: '%s'\n", config_filename);
exit(-1);
}
/* Reinitialize the logging system now that we have a config */
snprintf(user, sizeof(user), "%d", getuid());
snprintf(group, sizeof(group), "%d", getgid());
if(noit_security_usergroup(drop_to_user, drop_to_group, noit_true)) {
noitL(noit_stderr, "Failed to drop privileges, exiting.\n");
exit(-1);
}
noit_conf_log_init(appname);
cli_log_switches();
if(noit_security_usergroup(user, group, noit_true)) {
noitL(noit_stderr, "Failed to regain privileges, exiting.\n");
exit(-1);
}
if(debug)
noit_debug->enabled = 1;
snprintf(appscratch, sizeof(appscratch), "/%s/watchdog/@glider", appname);
if(!glider) noit_conf_get_string(NULL, appscratch, &glider);
noit_watchdog_glider(glider);
snprintf(appscratch, sizeof(appscratch), "/%s/watchdog/@tracedir", appname);
noit_conf_get_string(NULL, appscratch, &trace_dir);
if(trace_dir) noit_watchdog_glider_trace_dir(trace_dir);
/* Lastly, run through all other system inits */
snprintf(appscratch, sizeof(appscratch), "/%s/eventer/@implementation", appname);
if(!noit_conf_get_stringbuf(NULL, appscratch, conf_str, sizeof(conf_str))) {
noitL(noit_stderr, "Cannot find '%s' in configuration\n", appscratch);
exit(-1);
}
if(eventer_choose(conf_str) == -1) {
noitL(noit_stderr, "Cannot choose eventer %s\n", conf_str);
exit(-1);
}
if(configure_eventer(appname) != 0) {
noitL(noit_stderr, "Cannot configure eventer\n");
exit(-1);
}
noit_watchdog_prefork_init();
if(chdir("/") != 0) {
noitL(noit_stderr, "Failed chdir(\"/\"): %s\n", strerror(errno));
exit(-1);
}
/* Acquire the lock so that we can throw an error if it doesn't work.
* If we've started -D, we'll have the lock.
* If not we will daemon and must reacquire the lock.
*/
lockfd = -1;
lockfile[0] = '\0';
snprintf(appscratch, sizeof(appscratch), "/%s/@lockfile", appname);
if(noit_conf_get_stringbuf(NULL, appscratch,
lockfile, sizeof(lockfile))) {
if((lockfd = noit_lockfile_acquire(lockfile)) < 0) {
noitL(noit_stderr, "Failed to acquire lock: %s\n", lockfile);
exit(-1);
}
}
if(foreground) return passed_child_main();
watchdog_timeout_str = getenv("WATCHDOG_TIMEOUT");
if(watchdog_timeout_str) {
watchdog_timeout = atoi(watchdog_timeout_str);
noitL(noit_error, "Setting watchdog timeout to %d\n",
watchdog_timeout);
}
/* This isn't inherited across forks... */
if(lockfd >= 0) noit_lockfile_release(lockfd);
fd = open("/dev/null", O_RDWR);
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
if(fork()) exit(0);
setsid();
if(fork()) exit(0);
/* Reacquire the lock */
if(*lockfile) {
if(noit_lockfile_acquire(lockfile) < 0) {
noitL(noit_stderr, "Failed to acquire lock: %s\n", lockfile);
exit(-1);
}
}
signal(SIGHUP, SIG_IGN);
return noit_watchdog_start_child("noitd", passed_child_main, watchdog_timeout);
}