From a76bedb1a8643d17fc1f5e0a62a01c872126644b Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Fri, 5 Sep 2008 03:32:09 +0000
Subject: [PATCH] In wfShellExec(), log return code 127 to a special log file,
 to check for missing executables on the Wikimedia cluster.

---
 includes/GlobalFunctions.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/includes/GlobalFunctions.php b/includes/GlobalFunctions.php
index a58bbaf6af..4d50956e99 100644
--- a/includes/GlobalFunctions.php
+++ b/includes/GlobalFunctions.php
@@ -2113,6 +2113,10 @@ function wfShellExec( $cmd, &$retval=null ) {
 	passthru( $cmd, $retval );
 	$output = ob_get_contents();
 	ob_end_clean();
+
+	if ( $retval == 127 ) {
+		wfDebugLog( 'exec', "Possibly missing executable file: $cmd\n" );
+	}
 	return $output;
 
 }
-- 
2.20.1