fix: Use absolute paths and update sudoers for systemctl/lsscsi

dist/adastra-vtl-installer/web-ui/api.php

@@ -566,23 +566,15 @@ function loadConfig() {
 }
 
 function restartService() {
-    // Check if user has sudo privileges
-    $output = [];
-    $returnCode = 0;
+    // Run systemctl restart in background to prevent PHP timeout/hanging
+    // We strictly redirect output to /dev/null to ensure exec returns immediately
+    
+    exec("sudo /usr/bin/systemctl restart mhvtl > /dev/null 2>&1 &");
 
-    exec('sudo systemctl restart mhvtl 2>&1', $output, $returnCode);
-
-    if ($returnCode === 0) {
-        echo json_encode([
-            'success' => true,
-            'message' => 'Service restarted successfully'
-        ]);
-    } else {
-        echo json_encode([
-            'success' => false,
-            'error' => 'Failed to restart service: ' . implode("\n", $output)
-        ]);
-    }
+    echo json_encode([
+        'success' => true,
+        'message' => 'Service restart initiated. Changes will take effect in a few seconds.'
+    ]);
 }
 
 function listTapes() {
@@ -869,7 +861,7 @@ function restartAppliance() {
     // Create a script to restart after a delay
     $script = '#!/bin/bash
 sleep 2
-systemctl reboot
+/usr/bin/systemctl reboot
 ';
     
     $scriptPath = '/tmp/restart-appliance.sh';
@@ -889,7 +881,7 @@ function shutdownAppliance() {
     // Create a script to shutdown after a delay
     $script = '#!/bin/bash
 sleep 2
-systemctl poweroff
+/usr/bin/systemctl poweroff
 ';
     
     $scriptPath = '/tmp/shutdown-appliance.sh';
@@ -908,7 +900,7 @@ systemctl poweroff
 function getDeviceMapping() {
     $output = [];
     // Get all SCSI devices with generic device names (sg)
-    exec("lsscsi -g 2>&1", $output);
+    exec("sudo /usr/bin/lsscsi -g 2>&1", $output);
     
     // Filter for interesting devices (mediumx and tape)
     $devices = [];