feat: Implement parallel backup execution with result logging

backup-media.sh

@@ -457,7 +457,8 @@ backup_service() {
 
     # Handle Jellyseerr services with specialized backup function
     if [[ "$service" == jellyseerr_* ]]; then
-        return $(backup_jellyseerr_service "$service")
+        backup_jellyseerr_service "$service"
+        return $?
     fi
 
     # Handle special cases for container names
@@ -867,6 +868,57 @@ generate_summary_report() {
     } >> "$MARKDOWN_LOG"
 }
 
+# Wrapper function for parallel backup execution
+backup_service_wrapper() {
+    local service="$1"
+    local results_file="$2"
+
+    # Call the main backup function and capture result
+    if backup_service "$service"; then
+        # Use a lock file to safely write to results file
+        local lock_file="${results_file}.lock"
+        local max_wait=30
+        local wait_count=0
+
+        while [ $wait_count -lt $max_wait ]; do
+            if (set -C; echo $$ > "$lock_file") 2>/dev/null; then
+                break
+            fi
+            sleep 0.1
+            ((wait_count++))
+        done
+
+        if [ $wait_count -lt $max_wait ]; then
+            echo "SUCCESS:$service" >> "$results_file"
+            rm -f "$lock_file"
+        else
+            # Fallback if lock acquisition fails
+            echo "SUCCESS:$service" >> "$results_file"
+        fi
+    else
+        # Use a lock file to safely write to results file
+        local lock_file="${results_file}.lock"
+        local max_wait=30
+        local wait_count=0
+
+        while [ $wait_count -lt $max_wait ]; do
+            if (set -C; echo $$ > "$lock_file") 2>/dev/null; then
+                break
+            fi
+            sleep 0.1
+            ((wait_count++))
+        done
+
+        if [ $wait_count -lt $max_wait ]; then
+            echo "FAILED:$service" >> "$results_file"
+            rm -f "$lock_file"
+        else
+            # Fallback if lock acquisition fails
+            echo "FAILED:$service" >> "$results_file"
+        fi
+    fi
+}
+
 # Main backup execution function
 main() {
     local script_start_time
@@ -970,10 +1022,10 @@ main() {
         # Collect results
         while IFS= read -r result; do
             if [[ "$result" == SUCCESS:* ]]; then
-                ((success_count++))
+                success_count=$((success_count + 1))
                 backup_results+=("✓ ${result#SUCCESS:}")
             elif [[ "$result" == FAILED:* ]]; then
-                ((failed_count++))
+                failed_count=$((failed_count + 1))
                 backup_results+=("✗ ${result#FAILED:}")
             fi
         done < "$temp_results"
@@ -991,10 +1043,10 @@ main() {
         # Run backups sequentially
         for service in "${!MEDIA_SERVICES[@]}"; do
             if backup_service "$service"; then
-                ((success_count++))
+                success_count=$((success_count + 1))
                 backup_results+=("✓ $service")
             else
-                ((failed_count++))
+                failed_count=$((failed_count + 1))
                 backup_results+=("✗ $service")
             fi
         done