Updater: check whether system() is useable.

system() was disabled on my system for security reasons, but the
updater would just continue, only to find out that the tarball
hasn't been extracted.

diff --git a/plugins/updater/init.php b/plugins/updater/init.php
index ef48858b274afd0174c75dc9b2aca4d0e420853b..6ee018f74d766ec87285a36b69ee76ed8d9aa029 100644 (file)
--- a/plugins/updater/init.php
+++ b/plugins/updater/init.php
@@ -63,6 +63,20 @@ class Updater extends Plugin {
                                putenv("PATH=" . getenv("PATH") . PATH_SEPARATOR . "/bin" .
                                        PATH_SEPARATOR . "/usr/bin");
 
+                                array_push($log, "Checking for system() call...");
+
+                                $disabled = explode(',', ini_get('disable_functions'));
+                                foreach ($disabled as $function) {
+                                        if ( trim($function) == 'system' ) {
+                                                array_push($log, "Can not execute commands with PHP's system() function.");
+                                                $stop = true;
+                                        }
+                                }
+
+                                if ( $stop == true ) {
+                                        break;
+                                }
+
                                array_push($log, "Checking for tar...");
 
                                $system_rc = 0;