tar/tests/extrac23.at

# Test suite for GNU tar.                             -*- Autotest -*-
# Copyright 2020-2023 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/>.
AT_SETUP([--no-overwrite-dir])
AT_KEYWORDS([extract extrac23 no-overwrite-dir])

# Description: Implementation of the --no-overwrite-dir option was flawed in
# tar versions up to 1.32.90.  This option is intended to preserve metadata
# of existing directories.  In fact it worked only for non-empty directories.
# Moreover, if the actual directory was owned by the user tar runs as and the
# S_IWUSR bit was not set in its actual permissions, tar failed to create files
# in it.
#
# Reported by: Michael Kaufmann <[email protected]>
# References: <20200207112934.Horde.anXzYhAj2CHiwUrw5CuT0G-@webmail.michael-kaufmann.ch>,
#   https://lists.gnu.org/archive/html/bug-tar/2020-02/msg00003.html

AT_TAR_CHECK([
# Test if the directory permissions are restored properly.
mkdir dir
chmod 755 dir
tar cf a.tar dir
chmod 777 dir
tar -xf a.tar --no-overwrite-dir
genfile --stat=mode.777 dir

# Test if temporary permissions are set correctly to allow the owner
# to write to the directory.
genfile --file dir/file
tar cf a.tar dir
rm dir/file
chmod 400 dir
tar -xf a.tar --no-overwrite-dir
genfile --stat=mode.777 dir
chmod 700 dir
find dir
],
[0],
[777
400
dir
dir/file
])
AT_CLEANUP