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#!/bin/sh
# Ensure that printing a GPT partition table does not modify it.
# Copyright (C) 2009-2010 Free Software Foundation, Inc.
# This program 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.
# This program 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/>.
if test "$VERBOSE" = yes; then
set -x
parted --version
fi
: ${srcdir=.}
. $srcdir/t-lib.sh
N=2M
dev=loop-file
# create a file large enough to hold a GPT partition table
dd if=/dev/null of=$dev bs=1 seek=$N || framework_failure
fail=0
# create a GPT partition table
parted -s $dev mklabel gpt > out 2>&1 || fail=1
# expect no output
compare out /dev/null || fail=1
# save a copy of the original primary GPT table
dd if=$dev of=before count=1 skip=1 || fail=1
# extend the backing file by 1 byte
printf x >> $dev || fail=1
# use parted simply to print the partition table
parted -m -s $dev u s p > out 2> err || fail=1
# don't bother comparing stdout
# expect no stderr
compare err /dev/null || fail=1
# extract the primary GPT table again
dd if=$dev of=after count=1 skip=1 || fail=1
# compare partition tables (they had better be identical)
compare before after || fail=1
Exit $fail
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