tar/tests/incremental.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/>.

# A directory older than the listed entry was skipped completely.

AT_SETUP([incremental])
AT_KEYWORDS([incremental listed incr00])

AT_TAR_CHECK([
AT_CHECK_TIMESTAMP

mkdir structure
echo x >structure/file

# On Nextstep (and perhaps other 4.3BSD systems),
# a newly created file's ctime isn't updated
# until the next sync or stat operation on the file.
ls -l structure/file >/dev/null

# If the time of an initial backup and the creation time of a file contained
# in that backup are the same, the file will be backed up again when an
# incremental backup is done, because the incremental backup backs up
# files created "on or after" the initial backup time.  Without the sleep
# command, behaviour of tar becomes variable, depending whether the system
# clock ticked over to the next second between creating the file and
# backing it up.
sleep 1

tar cf archive --listed=list structure
tar cfv archive --listed=list structure
echo separator
# ReiserFS often offsets the timestamps of newly created files
# 1 second to the past.  Try to compensate for it, until a better
# solution is found.
sleep 2
echo y >structure/file
tar cfv archive --listed=list structure
],
[0],
[
structure/
separator
structure/
structure/file
],
[],[],[],[gnu,oldgnu,posix])

AT_CLEANUP