legacy_interfaces_details() switch to exec()

src/etc/inc/interfaces.lib.inc

@@ -207,11 +207,15 @@ function legacy_interfaces_details($intf=null)
     } else {
         $tmp_intf = "";
     }
-    $process = proc_open('/sbin/ifconfig -m ' . $tmp_intf , array(array("pipe", "r"), array("pipe", "w")), $pipes);
-    if (is_resource($process)) {
+    $cmd = '/sbin/ifconfig -m ' . $tmp_intf;
+    exec($cmd . ' 2>&1', $ifconfig_data, $ret);
+    if ($ret) {
+        log_error('The command `' . $cmd . '\' failed to execute ' . implode(' ', $ifconfig_data) );
+        return array();
+    }
+
     $current_interface = null;
-        $ifconfig_data = stream_get_contents($pipes[1]);
-        foreach (explode("\n", $ifconfig_data) as $line) {
+    foreach ($ifconfig_data as $line) {
         $line_parts = explode(' ', $line);
         if (strpos(trim($line), 'flags=') !== false) {
             $current_interface = explode(':', $line)[0];
@@ -264,9 +268,7 @@ function legacy_interfaces_details($intf=null)
         }
 
     }
-        fclose($pipes[1]);
-        proc_close($process);
-    }
+
     return $result;
 }