From fb7421206e35e85a56d6d9dbf2744a449084c9ee Mon Sep 17 00:00:00 2001
From: Tim Starling <tstarling@users.mediawiki.org>
Date: Tue, 4 Jul 2006 14:08:27 +0000
Subject: [PATCH] Made wfMkdirParents() faster and more robust

---
 includes/GlobalFunctions.php | 48 ++++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 10 deletions(-)

diff --git a/includes/GlobalFunctions.php b/includes/GlobalFunctions.php
index 0abdda715b..8b8d57a8e3 100644
--- a/includes/GlobalFunctions.php
+++ b/includes/GlobalFunctions.php
@@ -1535,18 +1535,46 @@ function wfTempDir() {
 /**
  * Make directory, and make all parent directories if they don't exist
  */
-function wfMkdirParents( $fullDir, $mode ) {
-	$parts = explode( '/', $fullDir );
-	$path = '';
-
-	foreach ( $parts as $dir ) {
-		$path .= $dir . '/';
-		if ( !is_dir( $path ) ) {
-			if ( !mkdir( $path, $mode ) ) {
-				return false;
-			}
+function wfMkdirParents( $fullDir, $mode = 0777 ) {
+	if ( strval( $fullDir ) === '' ) {
+		return true;
+	}
+	
+	# Go back through the paths to find the first directory that exists
+	$currentDir = $fullDir;
+	$createList = array();
+	while ( strval( $currentDir ) !== '' && !file_exists( $currentDir ) ) {	
+		# Strip trailing slashes
+		$currentDir = rtrim( $currentDir, '/\\' );
+
+		# Add to create list
+		$createList[] = $currentDir;
+
+		# Find next delimiter searching from the end
+		$p = max( strrpos( $currentDir, '/' ), strrpos( $currentDir, '\\' ) );
+		if ( $p === false ) {
+			$currentDir = false;
+		} else {
+			$currentDir = substr( $currentDir, 0, $p );
 		}
 	}
+	
+	if ( count( $createList ) == 0 ) {
+		# Directory specified already exists
+		return true;
+	} elseif ( $currentDir === false ) {
+		# Went all the way back to root and it apparently doesn't exist
+		return false;
+	}
+	
+	# Now go forward creating directories
+	$createList = array_reverse( $createList );
+	foreach ( $createList as $dir ) {
+		# use chmod to override the umask, as suggested by the PHP manual
+		if ( !mkdir( $dir, $mode ) || !chmod( $dir, $mode ) ) {
+			return false;
+		} 
+	}
 	return true;
 }
 
-- 
2.20.1