From 517f50995c634e600e73cf4208e90c464fe798b6 Mon Sep 17 00:00:00 2001
From: tokul <tokul@7612ce4b-ef26-0410-bec9-ea0150e637f0>
Date: Sat, 14 Jan 2006 09:33:56 +0000
Subject: [PATCH] prevent output in plugins/*/setup.php files.

git-svn-id: https://svn.code.sf.net/p/squirrelmail/code/trunk/squirrelmail@10536 7612ce4b-ef26-0410-bec9-ea0150e637f0
---
 ChangeLog            | 2 ++
 functions/plugin.php | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 4006276b..379aa68b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -515,6 +515,8 @@ Version 1.5.1 -- CVS
   - Added 'mail' and 'sn' attributes to address book LDAP backend search
     expression (#1368154).
   - Added mailbox caching code by Michael Long.
+  - Prevent output of whitespace during plugin activation. Fixes possible 
+    attachment corruption by incorrectly coded plugins.
 
 Version 1.5.0 - 2 February 2004
 -------------------------------
diff --git a/functions/plugin.php b/functions/plugin.php
index 8cf261b7..7ccc6bc9 100644
--- a/functions/plugin.php
+++ b/functions/plugin.php
@@ -220,9 +220,18 @@ function is_plugin_enabled($plugin_name) {
 
 /* On startup, register all plugins configured for use. */
 if (isset($plugins) && is_array($plugins)) {
+    // turn on output buffering in order to prevent output of new lines
+    ob_start();
     foreach ($plugins as $name) {
         use_plugin($name);
     }
+    // get output and remove whitespace
+    $output = trim(ob_get_contents());
+    ob_end_clean();
+    // if plugins output more than newlines and spacing, stop script execution.
+    if (!empty($output)) {
+        die($output);
+    }
 }
 
 ?>
\ No newline at end of file
-- 
2.25.1