<table><tr><td style="">arrowd 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><blockquote style="border-left: 3px solid #8C98B8;
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<div style="font-style: normal;
padding-bottom: 4px;">In <a href="https://phabricator.kde.org/D17816#677446" style="background-color: #e7e7e7;
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color: black;text-decoration: none;">D17816#677446</a>, <a href="https://phabricator.kde.org/p/kdudka/" style="
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padding: 0 4px;">@kdudka</a> wrote:</div>
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color: rgb(107, 116, 140);"><p>I was wondering why copying files in Krusader or Dolphin from a vfat-formatted memory card stopped working for me after update. After copying the first file, the transfer stopped progressing and the process ended up consuming 100% CPU forever. Later I discovered that the cause of the breakage was this patch: If fgetxattr() fails with ENOTSUP, the code loops indefinitely calling fgetxattr().</p>
<p>The following hotfix made copying of files in Krusader work again for me:<br />
...</p>
<p>However, the code might need bigger changes to cover all the cases. I do not fully understand the (IMO over-complicated) loops around flistxattr() and fgetxattr(). Note that the fact that one of them uses <tt style="background: #ebebeb; font-size: 13px;">while (true) { ... }</tt> whereas the other one uses <tt style="background: #ebebeb; font-size: 13px;">do { ... } while (true)</tt> does not improve code readability either.</p></div>
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<p>I think, the correct fix is something like</p>
<div class="remarkup-code-block" style="margin: 12px 0;" data-code-lang="diff" data-sigil="remarkup-code-block"><pre class="remarkup-code" style="font: 11px/15px "Menlo", "Consolas", "Monaco", monospace; padding: 12px; margin: 0; background: rgba(71, 87, 120, 0.08);"><span style="color: #000080">diff --git a/src/ioslaves/file/file_unix.cpp b/src/ioslaves/file/file_unix.cpp</span>
<span style="color: #000080">index 74767123..4bc87c57 100644</span>
<span style="color: #a00000">--- a/src/ioslaves/file/file_unix.cpp</span>
<span style="color: #00a000">+++ b/src/ioslaves/file/file_unix.cpp</span>
<span style="color: #800080">@@ -614,8 +614,8 @@ bool FileProtocol::copyXattrs(const int src_fd, const int dest_fd)</span>
valuelen = 0;
continue;
}
<span style="color: #a00000">- // happens when attr value is an empty string</span>
<span style="color: #a00000">- if (valuelen == 0) {</span>
<span style="color: #00a000">+ // valuelen=0 happens when attr value is an empty string</span>
<span style="color: #00a000">+ if (valuelen == 0 || valuelen == -1) {</span>
break;
}
} while (true);</pre></div>
<p>Can you check if this works for you too?</p></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>arrowd, dfaure, chinmoyr, bruns, Frameworks, tmarshall, usta, cochise<br /><strong>Cc: </strong>kdudka, usta, scheirle, tmarshall, arrowd, cfeck, bruns, phidrho, dhaumann, funkybomber, abika, pino, davidedmundson, ngraham, atha.kane, spoorun, nicolasfella, kde-frameworks-devel, LeGast00n, cblack, michaelh<br /></div>