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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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+# The bug occurs when extracting from a tarfile a directory when the directory
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+# already exists and the version in the tarfile has more permissive
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+# permissions than your umask. In this case, the permissions of the
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+# existing directory will toggle between the version which complies with
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+# your umask (which would be correct, without -p) and the version from the
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+# tarfile.
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+#
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+# Reported by: Ian Jackson <iwj@ubuntu.com>
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+#
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+# References: <17461.519.640947.664400@davenant.relativity.greenend.org.uk>
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+#
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+
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+AT_SETUP([mode of extracted directories])
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+AT_KEYWORDS([extract extract06])
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+
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+AT_TAR_CHECK([
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+
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+# Force umask
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+umask 022
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+
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+# Make sure user's umask is honored, even if we are superuser
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+TAR_OPTIONS="$TAR_OPTIONS --no-same-permissions"
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+
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+# Create a directory
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+mkdir directory
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+chmod 777 directory
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+genfile --stat=mode:777 directory
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+
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+# Archive it
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+tar cf arc directory
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+
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+# Change its permissions ...
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+chmod 755 directory
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+genfile --stat=mode:777 directory
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+
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+# ... and attempt to restore it twice
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+tar xf arc directory
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+genfile --stat=mode:777 directory
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+
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+tar xf arc directory
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+genfile --stat=mode:777 directory
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+
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+# After both restores, the directory mode should be 755
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+],
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+[0],
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+[777
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+755
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+755
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+755
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+])
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+
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+AT_CLEANUP
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Sergey Poznyakoff