GNU bug report logs - #20438
coreutils 8.23 on OS X : Calling gcp -al fails on symbolic links

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From: Thomas Baigneres <thomas.baigneres <at> cryptoexperts.com>
To: 20438 <at> debbugs.gnu.org
Subject: bug#20438: coreutils 8.23 on OS X : Calling gcp -al fails on symbolic links 
Date: Mon, 27 Apr 2015 13:34:03 +0200

Hello,

Consider the following directory hierarchy:

	$ ls -lR
	total 0
	drwxr-xr-x  4 user  group  136 Apr 24 13:51 source

	./source:
	total 16
	-rw-r--r--  1 user  group  0 Apr 24 13:50 file.txt
	lrwxr-xr-x  1 user  group  8 Apr 24 13:51 symbolic-link-to-file -> file.txt


Trying to copy the `source` directory with the options -a (archive) and -l
(hard link files instead of copying) fails when using the 8.23 version
of coreutils:

	$ gcp -al source destination
	gcp: cannot create hard link 'destination/symbolic-link-to-file' to
	'source/symbolic-link-to-file': Operation not supported

Trying to do the same with the 8.22 version of coreutils works as
expected :

	$ gcp -al source destination
	$ ls -lR
	total 0
	drwxr-xr-x  4 user  group  136 Apr 24 13:51 destination
	drwxr-xr-x  4 user  group  136 Apr 24 13:51 source

	./destination:
	total 16
	-rw-r--r--  2 user  group  0 Apr 24 13:50 file.txt
	lrwxr-xr-x  1 user  group  8 Apr 24 13:51 symbolic-link-to-file -> file.txt

	./source:
	total 16
	-rw-r--r--  2 user  group  0 Apr 24 13:50 file.txt
	lrwxr-xr-x  1 user  group  8 Apr 24 13:51 symbolic-link-to-file -> file.txt


Searching the internet suggests that the culprit might be the `linkat()`
function, which exists but does not work as expected by coreutils.

Regards,

Thomas

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