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+# Process this file with autom4te to create testsuite. -*- Autotest -*-
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+
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+# Test suite for GNU tar.
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+# Copyright (C) 2006 Free Software Foundation, Inc.
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+
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 2, or (at your option)
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+# any later version.
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+
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+
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+# You should have received a copy of the GNU General Public License
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+# along with this program; if not, write to the Free Software
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+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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+# 02110-1301, USA.
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+
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+# Using tar 1.15.x the following equivalent command sets:
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+#
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+# 1. tar cf archive file1 file2
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+# and
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+# 2. tar cfT archive /dev/null
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+# tar rf archive file1
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+# tar rt archive file2
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+#
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+# produced different archives (GNU format is assumed). Namely, in the
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+# second case the mode field of all members, except the first, was truncated
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+# to lower 3 octets (& 0777).
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+#
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+# References:
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+# <[email protected]>
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+# http://lists.gnu.org/archive/html/bug-tar/2006-07/msg00029.html
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+
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+# The test case below verifies that the equivalent create and append commands
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+# produce binary equivalent archives for all formats.
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+
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+AT_SETUP([append vs. create])
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+AT_KEYWORDS([append append02 append-gnu])
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+
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+AT_TAR_CHECK([
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+genfile --file file1
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+genfile --file file2
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+
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+# For PAX archives, we need to make sure extended header names are
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+# reproducible.
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+if test $[]TEST_TAR_FORMAT = posix; then
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+ TAR_OPTIONS="$TAR_OPTIONS --pax-option=exthdr.name=%d/PaxHeaders/%f"
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+fi
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+
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+echo Creating archive.1
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+tar cf archive.1 file1 file2
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+
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+echo Creating archive.2
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+tar cfT archive.2 /dev/null
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+tar rf archive.2 file1
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+tar rf archive.2 file2
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+
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+echo Comparing archives
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+cmp archive.1 archive.2
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+],
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+[0],
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+[Creating archive.1
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+Creating archive.2
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+Comparing archives
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+])
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+
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+AT_CLEANUP
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+
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+# End of append02.at
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Sergey Poznyakoff