# Test suite for GNU tar.                             -*- Autotest -*-
# Copyright 2025-2026 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/>.

AT_SETUP([extracting untrusted incremental])
AT_KEYWORDS([extract extrac31 --absolute-names])


AT_TAR_CHECK([

# Extraction should not escape the extraction directory
# even when extracting multiple times to the same directory.
(umask 022 && mkdir -p dira/sub dirb/sym dirb/sub/sym ext victimdir victimexp)
ln -s .. dira/sub/dotdot
ln -s ../sub dira/sub/dot
ln -s dotdot/sub dira/sub/anotherdot
ln -s ../victimdir dira/sym
ln -s dotdot/../victimdir dira/sub/sym
echo b1 >dirb/sym/file1
echo b2 >dirb/sub/sym/file2
echo v >victimdir/expected
echo v >victimdir/file1
echo v >victimdir/file2
cp victimdir/* victimexp
tar -cf a.tar -C dira sub sym
tar -cf b.tar -C dirb sym/file1 sub/sym/file2
tar -xf a.tar -C ext
echo status1=$?
tar -xf b.tar -C ext 2>b.err
echo status2=$?

# FreeBSD 15 says "Capabilities insufficient".
# Solaris 10 says just "Cross-device link".
sed '
  s/: Capabilities insufficient$/: Invalid cross-device link/
  s/: Cross-device link$/: Invalid cross-device link/
' b.err >&2

diff victimdir victimexp
],
[],
[status1=0
status2=2
],
[tar: sym/file1: Cannot open: Invalid cross-device link
tar: sub/sym/file2: Cannot open: Invalid cross-device link
tar: Exiting with failure status due to previous errors
])
AT_CLEANUP