tar/tests/link01.at

# Process this file with autom4te to create testsuite. -*- Autotest -*-

# Test suite for GNU tar.
# Copyright 2004-2023 Free Software Foundation, Inc.

# This file is part of GNU tar.

# GNU tar is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.

# GNU tar is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Problem: If a member with link count > 2 was stored in the archive twice,
# previous versions of tar were not able to extract it, since they
# were trying to link the file to itself, which always failed and
# lead to removing the already extracted copy. This script tests
# the workaround by Paul Eggert that leaves the extracted copy
# untouched.
#
# Reported by: Toby Peterson <[email protected]>
#
# References: <[email protected]>
# http://lists.gnu.org/archive/html/bug-tar/2004-07/msg00009.html

AT_SETUP([link count gt 2])
AT_KEYWORDS([hardlinks link01])

AT_TAR_CHECK([
mkdir directory
mkdir directory/test1
mkdir directory/test2

echo TEST > directory/test1/test.txt
ln directory/test1/test.txt directory/test2/test.txt || AT_SKIP_TEST

tar cf archive directory/test1/test.txt directory/test1/test.txt

rm -r directory
tar xf archive --warning=no-timestamp

ls directory/test1
],
[0],
[test.txt
])

AT_CLEANUP