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<title>[33688] trunk/src/wp-admin/includes/class-wp-filesystem-ssh2.php: WP_Filesystem: SSH2 handler: Remove support for is_writable() via SSH, it turns out PHP doesn't verify the writability via SFTP and instead uses a comparison based on the current php system process user instead of the ssh user.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/33688">33688</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/33688","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>dd32</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-08-21 11:42:04 +0000 (Fri, 21 Aug 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>WP_Filesystem: SSH2 handler: Remove support for is_writable() via SSH, it turns out PHP doesn't verify the writability via SFTP and instead uses a comparison based on the current php system process user instead of the ssh user.
This fixes the 'The update cannot be installed because we will be unable to copy some files.' error encountered during updates by skipping the write test completely.
Props jobst.
Fixes <a href="https://core.trac.wordpress.org/ticket/33480">#33480</a> for trunk</pre>
<h3>Modified Paths</h3>
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<li><a href="#trunksrcwpadminincludesclasswpfilesystemssh2php">trunk/src/wp-admin/includes/class-wp-filesystem-ssh2.php</a></li>
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<h3>Diff</h3>
<a id="trunksrcwpadminincludesclasswpfilesystemssh2php"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-admin/includes/class-wp-filesystem-ssh2.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-admin/includes/class-wp-filesystem-ssh2.php 2015-08-21 05:32:53 UTC (rev 33687)
+++ trunk/src/wp-admin/includes/class-wp-filesystem-ssh2.php 2015-08-21 11:42:04 UTC (rev 33688)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -383,8 +383,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return bool
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public function is_writable($file) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $file = ltrim($file, '/');
- return is_writable('ssh2.sftp://' . $this->sftp_link . '/' . $file);
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // PHP will base it's writable checks on system_user === file_owner, not ssh_user === file_owner
+ return true;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $file
</span></span></pre>
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