tar/tests/incr02.at

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

# Test suite for GNU tar.
# Copyright 2005-2023 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/>.

# Description:
# Restoring of directory modes and timestamps works correctly only
# if the archive has normal member ordering, i.e. each directory
# member is immediately followed by members located under that directory.
# This is not true for incremental archives, where directory members
# precede the non-directory ones. Due to this, GNU tar up to version 1.15.2
# failed to correctly restore directory timestamps from an incremental
# archive if this directory contained some files in it.
#
# References: <[email protected]>

AT_SETUP([restoring timestamps from incremental])
AT_KEYWORDS([incremental timestamp restore incr02])

AT_TAR_CHECK([
AT_CHECK_TIMESTAMP
# Create directory structure
mkdir dir
mkdir dir/subdir1
mkdir dir/subdir2
genfile --length 10 --file dir/subdir1/file

# Save mtime for later comparison
genfile --stat=mtime dir/subdir1 > ts

# Create an archive. Using incremental mode makes sure the
# archive will have a directory-first member ordering,
# i.e.:
# dir/
# dir/subdir1/
# dir/subdir2/
# dir/subdir1/foofile
#
# When restoring from this directory structure, 'dir/subdir2/' used to
# trigger apply_nonancestor_delayed_set_stat() which restored stats for
# 'subdir1' prior to restoring 'dir/subdir1/foofile'. Then, restoring the
# latter clobbered the directory timestamp.

tar -cf archive -g db dir

# Move away the directory
mv dir orig

# Wait enough time for timestamps to differ in case of failure.
sleep 5

# Restore the directory
tar -xf archive dir

# Check the timestamp
genfile --stat=mtime dir/subdir1 | diff ts -
],
[0],
[],[],[],[],[gnu, oldgnu, posix])

AT_CLEANUP

# End of incr02.at