Tickets :: Comment on [#8669] ssh2 VFS module stat() cache needs to be flushed in read() before checking file size

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Comment	> The remote file is able to be successfully retrieved by the ssh2 VFS > module and stored in a local temp file. However, the "$size = > filesize($file);" line in the read() function returns the size of the > local temp file as 0 which in turn results in no file content being > returned. > > > > This is caused by calling certain other PHP function(s) (which rely > on the underlying OS stat() function) on the temp file prior to it > actually being populated with remote content. The details of the > first stat() on the temp file are cached in the PHP stat cache, so > even though the temp file subsequently gets populated with content, > the cache returns data for the temp file which is stale. > > > > On a more general note, this type of bug seems like it may be > relevant to any filesystem-based VFS modules, so it may be wise to > audit the use of the functions listed here in the "Affected > functions" list: > > http://us2.php.net/manual/en/function.clearstatcache.php > > and check if calls to clearstatcache() are required in other places > within Horde as well.
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