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bug#8419: cp -au : New hard links in source becomes new files at destina

From: Pádraig Brady
Subject: bug#8419: cp -au : New hard links in source becomes new files at destination when using cp -au
Date: Mon, 25 Jul 2011 17:26:53 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100227 Thunderbird/3.0.3

Actually I'm wondering now whether the new code
should be unconditionally replacing the dest?
What if the dest is a separate newer file?
I.E. I think the following amended test should pass?
Also what about backups if the separate file is older?

diff --git a/tests/cp/preserve-link b/tests/cp/preserve-link
index d0da873..cee5ec0 100755
--- a/tests/cp/preserve-link
+++ b/tests/cp/preserve-link
@@ -28,13 +28,26 @@ same_inode()

 mkdir -p s t/s || framework_failure_
 touch s/f t/s/f || framework_failure_
+# a non existing link must be linked in the dest tree
 ln s/f s/link || framework_failure_

+# an existing link must be updated
+ln s/f s/linke || framework_failure_
+ln t/s/f t/s/linke || framework_failure_
+# a updated link must not be overwritten
+ln s/f s/linku || framework_failure_
+touch -d "+2 hour" t/s/linku || framework_failure_
 # This must create a hard link, t/s/link, to the existing file, t/s/f.
 # With cp from coreutils-8.12 and prior, it would mistakenly copy
 # the file rather than creating the link.
+touch -d "+1 hour" s/f || framework_failure_
 cp -au s t || fail=1

 same_inode t/s/f t/s/link || fail=1
+same_inode t/s/f t/s/linke || fail=1
+same_inode t/s/f t/s/linku && fail=1

 Exit $fail

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