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Prevent wpmu_delete_blog from removing the wrong uploads directory 

`wp_upload_dir()` includes some logic to fall back to the default site's upload directory if a specific directory for the requested site cannot be found. Because of this, if `wpmu_delete_blog()` is fired twice in a row for the same site, the main site's upload directory could be deleted as well.

This adds some checks in `wpmu_delete_blog()` so that we are confident in the site and it's upload directory's existence before dropping the site. Tests are added for when `ms_files_rewriting` is enabled or disabled.

Fixes #30121

Built from https://develop.svn.wordpress.org/trunk@30404


git-svn-id: http://core.svn.wordpress.org/trunk@30399 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Jeremy Felt 2014-11-20 06:53:22 +00:00
parent d0b10b5022
commit 3a7b5748eb
1 changed files with 17 additions and 3 deletions
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20
wp-admin/includes/ms.php
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@ -85,11 +85,26 @@ function wpmu_delete_blog( $blog_id, $drop = false ) {
$current_site = get_current_site();
// Don't destroy the initial, main, or root blog.
if ( $drop && ( 1 == $blog_id || is_main_site( $blog_id ) || ( $blog->path == $current_site->path && $blog->domain == $current_site->domain ) ) )
// If a full blog object is not available, do not destroy anything.
if ( $drop && ! $blog ) {
$drop = false;
}
// Don't destroy the initial, main, or root blog.
if ( $drop && ( 1 == $blog_id || is_main_site( $blog_id ) || ( $blog->path == $current_site->path && $blog->domain == $current_site->domain ) ) ) {
$drop = false;
}
$upload_path = trim( get_option( 'upload_path' ) );
// If ms_files_rewriting is enabled and upload_path is empty, wp_upload_dir is not reliable.
if ( $drop && get_site_option( 'ms_files_rewriting' ) && empty( $upload_path ) ) {
$drop = false;
}
if ( $drop ) {
$uploads = wp_upload_dir();
$tables = $wpdb->tables( 'blog' );
/**
* Filter the tables to drop when the blog is deleted.
@ -107,7 +122,6 @@ function wpmu_delete_blog( $blog_id, $drop = false ) {
$wpdb->delete( $wpdb->blogs, array( 'blog_id' => $blog_id ) );
$uploads = wp_upload_dir();
/**
* Filter the upload base directory to delete when the blog is deleted.
*