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ln: --relative: fix updating of existing symlinks

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Don't dereference an existing symlink being replaced.
I.E. generate the symlink relative to the symlink's containing dir,
rather than to some arbitrary place it points to.

* src/ln.c (convert_abs_rel): Don't consider the final component
of the symlink name when canonicalizing, as we want to avoid
dereferencing the final component.
* tests/ln/relative.sh: Add a test case.
* NEWS: Mention the fix.
Resolves http://bugs.gnu.org/14116
This commit is contained in:
Rémy Lefevre
2013-04-02 02:48:28 +01:00
committed by Pádraig Brady
parent 20d7bce0f7
commit e52293aa7f
3 changed files with 17 additions and 6 deletions
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5
tests/ln/relative.sh
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@@ -29,4 +29,9 @@ test $(readlink usr/bin/foo) = '../lib/foo/foo' || fail=1
ln -sr usr/bin/foo usr/lib/foo/link-to-foo
test $(readlink usr/lib/foo/link-to-foo) = 'foo' || fail=1
# Correctly update an existing link, which was broken in <= 8.21
ln -s dir1/dir2/f existing_link
ln -srf here existing_link
test $(readlink existing_link) = 'here' || fail=1
Exit $fail