some fixes, sill have troubles with dummy socket/fd

Daemons/weatherdaemon_multimeteo/weathlib.c

@@ -0,0 +1,66 @@
+/*
+ * This file is part of the weatherdaemon project.
+ * Copyright 2026 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// Some common functions and handlers for sensors
+
+#include "weathlib.h"
+
+/**
+ * @brief sensor_alive - test if sensor's thread isn't dead
+ * @param s - sensor
+ * @return FALSE if thread is dead
+ */
+int sensor_alive(sensordata_t *s){
+    if(!s) return FALSE;
+    if(pthread_kill(s->thread, 0)) return FALSE;
+    return TRUE;
+}
+
+/**
+ * @brief common_onrefresh - common `change onrefresh handler`
+ * @param s - sensor
+ * @return FALSE if failed
+ */
+int common_onrefresh(sensordata_t *s, void (*handler)(sensordata_t *)){
+    FNAME();
+    if(!s || !handler) return FALSE;
+    s->freshdatahandler = handler;
+    return TRUE;
+}
+
+/**
+ * @brief common_kill - common `die` function
+ * @param s - sensor
+ */
+void common_kill(sensordata_t *s){
+    FNAME();
+    if(!s) return;
+    if(0 == pthread_kill(s->thread, -9)){
+        DBG("%s main thread killed, join", s->name);
+        pthread_join(s->thread, NULL);
+        DBG("Done");
+    }
+    DBG("Delete RB");
+    sl_RB_delete(&s->ringbuffer);
+    if(s->fdes > -1){
+        close(s->fdes);
+        DBG("FD closed");
+    }
+    FREE(s->values);
+    DBG("Sensor %s killed", s->name);
+}