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# Preserve first 446B of the Protected MBR for gpt partitions.
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# Copyright (C) 2009-2012 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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. "${srcdir=.}/init.sh"; path_prepend_ ../parted
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dd if=/dev/null of=$dev bs=1 seek=1M || 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 /dev/null out || fail=1
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# Fill the first $bootcode_size bytes with 0's.
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# This affects only the protective MBR, so doesn't affect validity of gpt table.
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printf %0${bootcode_size}d 0 > in || fail=1
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dd of=$dev bs=1 seek=0 count=$bootcode_size conv=notrunc < in || fail=1
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parted -s $dev p || fail=1
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# create a GPT partition table on top of the existing one.
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parted -s $dev mklabel gpt > out 2>&1 || fail=1
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compare /dev/null out || fail=1
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# Extract the first $bootcode_size Bytes after GPT creation
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dd if=$dev of=after bs=1c count=$bootcode_size > /dev/null 2>&1 || fail=1
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# Compare the before and after
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compare in after || fail=1
added
removed
tests/t0202-gpt-pmbr.sh
