void sig_handler_logrotate(int signo)
{
if(signo) {
- error_log_limit_reset();
+ error_log_limit_unlimited();
info("Received signal %d to re-open the log files", signo);
reopen_all_log_files();
+ error_log_limit_reset();
}
}
void sig_handler_save(int signo)
{
if(signo) {
- error_log_limit_reset();
+ error_log_limit_unlimited();
info("Received signal %d to save the database...", signo);
rrdset_save_all();
+ error_log_limit_reset();
+ }
+}
+
+void sig_handler_reload_health(int signo)
+{
+ if(signo) {
+ error_log_limit_unlimited();
+ info("Received signal %d to reload health configuration...", signo);
+ health_reload();
+ error_log_limit_reset();
}
}
}
}
+void create_needed_dir(const char *dir, uid_t uid, gid_t gid)
+{
+ // attempt to create the directory
+ if(mkdir(dir, 0755) == 0) {
+ // we created it
+
+ // chown it to match the required user
+ if(chown(dir, uid, gid) == -1)
+ error("Cannot chown directory '%s' to %u:%u", dir, (unsigned int)uid, (unsigned int)gid);
+ }
+ else if(errno != EEXIST)
+ // log an error only if the directory does not exist
+ error("Cannot create directory '%s'", dir);
+}
+
int become_user(const char *username, int pid_fd)
{
struct passwd *pw = getpwnam(username);
uid_t uid = pw->pw_uid;
gid_t gid = pw->pw_gid;
+ create_needed_dir(CACHE_DIR, uid, gid);
+ create_needed_dir(VARLIB_DIR, uid, gid);
+
+ if(pidfile[0]) {
+ if(chown(pidfile, uid, gid) == -1)
+ error("Cannot chown '%s' to %u:%u", pidfile, (unsigned int)uid, (unsigned int)gid);
+ }
+
int ngroups = (int)sysconf(_SC_NGROUPS_MAX);
gid_t *supplementary_groups = NULL;
if(ngroups) {
if(!done)
error("Cannot adjust my Out-Of-Memory score to %d.", score);
else
- info("Adjusted my Out-Of-Memory score to %d.", score);
+ debug(D_SYSTEM, "Adjusted my Out-Of-Memory score to %d.", score);
}
int sched_setscheduler_idle(void) {
+#ifdef SCHED_IDLE
const struct sched_param param = {
.sched_priority = 0
};
if(i != 0)
error("Cannot adjust my scheduling priority to IDLE.");
else
- info("Adjusted my scheduling priority to IDLE.");
+ debug(D_SYSTEM, "Adjusted my scheduling priority to IDLE.");
return i;
+#else
+ return -1;
+#endif
}
int become_daemon(int dont_fork, const char *user)
// never become a problem
if(sched_setscheduler_idle() != 0) {
if(nice(19) == -1) error("Cannot lower my CPU priority.");
- else info("Set my nice value to 19.");
+ else debug(D_SYSTEM, "Set my nice value to 19.");
}
if(user && *user) {
if(become_user(user, pidfd) != 0) {
error("Cannot become user '%s'. Continuing as we are.", user);
}
- else info("Successfully became user '%s'.", user);
+ else debug(D_SYSTEM, "Successfully became user '%s'.", user);
+ }
+ else {
+ create_needed_dir(CACHE_DIR, getuid(), getgid());
+ create_needed_dir(VARLIB_DIR, getuid(), getgid());
}
if(pidfd != -1) {