func exitError for consistent error logging

backup_new.sh

@@ -35,6 +35,19 @@ badParam () {
     fi
 }
 
+exitError () {
+    errCode="error_$1"
+    eval errReport='$'"$errCode"
+    if [ -n "$errReport" ]; then
+        printf "${err}[%s] -- [ERROR] %s: %s --${norm}\n" \
+            "$(stamp)" "$1" "$errReport" >> "$logFile"
+    else
+        printf "${err}[%s] -- [ERROR] Unknown error code reported --${norm}\n" \
+            "$(stamp)" >> "$logFile"
+    fi
+    exit "$1"
+}
+
 # control seafile services (systemd)
 seafSvc () {
     if [ "$1" = "start" ]; then