+void logger(int level, int priority, const char *format, ...) {
+ va_list ap;
+ char message[1024] = "";
+
+ va_start(ap, format);
+ int len = vsnprintf(message, sizeof(message), format, ap);
+ message[sizeof(message) - 1] = 0;
+ va_end(ap);
+
+ if(len > 0 && len < sizeof(message) - 1 && message[len - 1] == '\n')
+ message[len - 1] = 0;
+
+ real_logger(level, priority, message);
+}
+
+static void sptps_logger(sptps_t *s, int s_errno, const char *format, va_list ap) {
+ char message[1024];
+ size_t msglen = sizeof(message);
+
+ int len = vsnprintf(message, msglen, format, ap);
+ message[sizeof(message) - 1] = 0;
+ if(len > 0 && len < sizeof(message) - 1) {
+ if(message[len - 1] == '\n')
+ message[--len] = 0;
+
+ // WARNING: s->handle can point to a connection_t or a node_t,
+ // but both types have the name and hostname fields at the same offsets.
+ connection_t *c = s->handle;
+ if(c)
+ snprintf(message + len, sizeof(message) - len, " from %s (%s)", c->name, c->hostname);
+ }
+
+ real_logger(DEBUG_ALWAYS, LOG_ERR, message);
+}
+
+void openlogger(const char *ident, logmode_t mode) {
+ logident = ident;
+ logmode = mode;
+
+ switch(mode) {
+ case LOGMODE_STDERR:
+ logpid = getpid();
+ break;
+ case LOGMODE_FILE:
+ logpid = getpid();
+ logfile = fopen(logfilename, "a");
+ if(!logfile) {
+ fprintf(stderr, "Could not open log file %s: %s\n", logfilename, strerror(errno));
+ logmode = LOGMODE_NULL;
+ }
+ break;
+ case LOGMODE_SYSLOG:
+#ifdef HAVE_MINGW
+ loghandle = RegisterEventSource(NULL, logident);
+ if(!loghandle) {
+ fprintf(stderr, "Could not open log handle!");
+ logmode = LOGMODE_NULL;
+ }
+ break;
+#else
+#ifdef HAVE_SYSLOG_H
+ openlog(logident, LOG_CONS | LOG_PID, LOG_DAEMON);
+ break;
+#endif
+#endif
+ case LOGMODE_NULL:
+ break;
+ }
+
+ if(logmode != LOGMODE_NULL)
+ sptps_log = sptps_logger;
+ else
+ sptps_log = sptps_log_quiet;
+}
+
+void reopenlogger() {
+ if(logmode != LOGMODE_FILE)
+ return;
+
+ fflush(logfile);
+ FILE *newfile = fopen(logfilename, "a");
+ if(!newfile) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reopen log file %s: %s", logfilename, strerror(errno));
+ return;
+ }
+ fclose(logfile);
+ logfile = newfile;
+}
+
+