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# Ensure that printing a GPT partition table does not modify it.
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# Copyright (C) 2009 Free Software Foundation, Inc.
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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 3 of the License, or
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# (at your option) any later version.
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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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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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if test "$VERBOSE" = yes; then
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# create a file large enough to hold a GPT partition table
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dd if=/dev/null of=$dev bs=1 seek=$N || framework_failure
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# create a GPT partition table
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parted -s $dev mklabel gpt > out 2>&1 || fail=1
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compare out /dev/null || fail=1
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# save a copy of the original primary GPT table
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dd if=$dev of=before count=1 skip=1 || fail=1
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# extend the backing file by 1 byte
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printf x >> $dev || fail=1
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# use parted simply to print the partition table
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parted -m -s $dev u s p > out 2> err || fail=1
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# don't bother comparing stdout
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compare err /dev/null || fail=1
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# extract the primary GPT table again
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dd if=$dev of=after count=1 skip=1 || fail=1
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# compare partition tables (they had better be identical)
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compare before after || fail=1