<table><tr><td style="">bruns added a comment.
</td><a style="text-decoration: none; padding: 4px 8px; margin: 0 8px 8px; float: right; color: #464C5C; font-weight: bold; border-radius: 3px; background-color: #F7F7F9; background-image: linear-gradient(to bottom,#fff,#f1f0f1); display: inline-block; border: 1px solid rgba(71,87,120,.2);" href="https://phabricator.kde.org/D17816">View Revision</a></tr></table><br /><div><div><p>Does this work correctly when the source is a symlink? - getxattr vs lgetxattr.</p></div></div><br /><div><strong>INLINE COMMENTS</strong><div><div style="margin: 6px 0 12px 0;"><div style="border: 1px solid #C7CCD9; border-radius: 3px;"><div style="padding: 0; background: #F7F7F7; border-color: #e3e4e8; border-style: solid; border-width: 0 0 1px 0; margin: 0;"><div style="color: #74777d; background: #eff2f4; padding: 6px 8px; overflow: hidden;"><a style="float: right; text-decoration: none;" href="https://phabricator.kde.org/D17816#inline-109208">View Inline</a><span style="color: #4b4d51; font-weight: bold;">copyxattrjob.cpp:134</span></div>
<div style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; white-space: pre-wrap; clear: both; padding: 4px 0; margin: 0;"><div style="padding: 0 8px; margin: 0 4px; background: rgba(151, 234, 151, .6);"><span style="color: #304a96">#endif</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(151, 234, 151, .6);"> <span style="color: #aa4000">if</span> <span class="p">(</span><span class="n">valuelen</span> <span style="color: #aa2211">==</span> <span style="color: #aa2211">-</span><span style="color: #601200">1</span><span class="p">)</span> <span class="p">{</span>
</div><div style="padding: 0 8px; margin: 0 4px; background: rgba(151, 234, 151, .6);"> <span class="n">q</span><span style="color: #aa2211">-></span><span class="n">setErrorText</span><span class="p">(</span><span class="n">QLatin1String</span><span class="p">(</span><span style="color: #766510">"libc failed to extract a xattr value from file"</span><span class="p">));</span>
</div></div></div>
<div style="margin: 8px 0; padding: 0 12px;"><p style="padding: 0; margin: 8px;">if errno=ERANGE, the list has grown after you called listxattr(file, nullptr, 0). This is completetely valid, see man 2 listxattr:</p>
<blockquote style="border-left: 3px solid #a7b5bf; color: #464c5c; font-style: italic; margin: 4px 0 12px 0; padding: 4px 12px; background-color: #f8f9fc;"><p style="padding: 0; margin: 8px;">But, bear in mind that there is a possibility that the set of extended attributes may change between the two calls, so that it is still necessary to check the return status from the second call.</p></blockquote>
<p style="padding: 0; margin: 8px;">Same applies for getxattr.</p>
<p style="padding: 0; margin: 8px;">Also, you can cut the number of syscalls by half by using an opportunistic buffer size. Also saves you from allocating a buffer for each attribute value. As said, you have to check for "ERANGE" anyway.</p></div></div></div></div></div><br /><div><strong>REPOSITORY</strong><div><div>R241 KIO</div></div></div><br /><div><strong>REVISION DETAIL</strong><div><a href="https://phabricator.kde.org/D17816">https://phabricator.kde.org/D17816</a></div></div><br /><div><strong>To: </strong>cochise, dfaure<br /><strong>Cc: </strong>cfeck, bruns, phidrho, dhaumann, funkybomber, abika, pino, davidedmundson, ngraham, atha.kane, spoorun, nicolasfella, kde-frameworks-devel, michaelh<br /></div>