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#!/bin/sh
# Ensure that parted leaves at least 2 sectors between the beginning
# of an extended partition and the first logical partition.
# Before parted-2.3, it could be made to leave just one, and that
# would cause trouble with the Linux kernel.
# Copyright (C) 2010-2013 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/>.
. "${srcdir=.}/init.sh"; path_prepend_ ../parted
require_root_
require_scsi_debug_module_
# create memory-backed device
scsi_debug_setup_ dev_size_mb=1 > dev-name ||
skip_ 'failed to create scsi_debug device'
scsi_dev=$(cat dev-name)
p1=${scsi_dev}1
p5=${scsi_dev}5
cat <<EOF > exp || framework_failure
BYT;
$scsi_dev:2048s:scsi:512:512:msdos:Linux scsi_debug:;
1:64s:128s:65s:::lba;
5:66s:128s:63s:::;
EOF
cat <<EOF > err.exp || framework_failure
Error: Partition(s) 5 on $scsi_dev have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use. As a result, the old partition(s) will remain in use. You should reboot now before making further changes.
EOF
# Create a DOS label with an extended partition starting at sector 64.
parted -s $scsi_dev mklabel msdos || fail=1
parted --align=min -s $scsi_dev mkpart extended 64s 128s> out 2>&1 || fail=1
parted -m -s $scsi_dev u s print
compare /dev/null out || fail=1
# Provoke a failure by trying to create a partition that starts just
# one sector after the start of the extended partition.
parted --align=min -s $scsi_dev mkpart logical 65s 128s > err 2>&1 && fail=1
compare err.exp err || fail=1
# The above failed, but created the partition nonetheless. Remove it.
parted -s $scsi_dev rm 5 || fail=1
parted --align=min -s $scsi_dev mkpart logical 66s 128s > out 2>&1 || fail=1
compare /dev/null out || fail=1
parted -m -s $scsi_dev u s print > out 2>&1
compare exp out || fail=1
Exit $fail
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