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|
#!/bin/bash
# import functions library
source rescue_common
tmpdir="/tmp/flash-rescue-root"
rootdir="$tmpdir/pen"
config_files_network_scripts="etc/sysconfig/network-scripts/ifcfg-* \
etc/sysconfig/network-scripts/cellular.d \
etc/sysconfig/network-scripts/vpn.d \
etc/sysconfig/network-scripts/wireless.d"
config_files_users="etc/passwd etc/shadow etc/group etc/gshadow"
config_files_time="etc/localtime etc/ntp etc/ntp.conf"
config_files="etc/sysconfig/* $config_files_users $config_files_time \
etc/wpa_supplicant.conf etc/shorewall etc/kde \
etc/udev/rules.d/61-*_config.rules"
config_files_to_remove="etc/sysconfig/harddrake2"
function prepare() {
modprobe unionfs > /dev/null 2>&1
modprobe squashfs > /dev/null 2>&1
modprobe loop > /dev/null 2>&1
mkdir -p $rootdir
mkdir -p $tmpdir/squash
mkdir -p $tmpdir/user
mkdir -p $tmpdir/union
if ! mount_usbroot $rootdir; then
return 1
fi
mount -t ext2 -o loop $sys_loop $tmpdir/user > /dev/null 2>&1
if [ $? -ne 0 ]; then
echo "Error mounting system.loop"
return 1
fi
return 0
}
function get_existing_rpms() {
mount -t squashfs -o loop $sfs_loop $tmpdir/squash > /dev/null 2>&1
if [ $? -ne 0 ]; then
echo "Error mounting distrib.sqfs"
return 1
fi
mount -t unionfs -o dirs=$tmpdir/user=rw:$tmpdir/squash=ro \
none $tmpdir/union
if [ $? -ne 0 ]; then
echo "Error creating union of distrib.sqfs and system.loop"
return 1
fi
chroot $tmpdir/union rpm -qa > /tmp/existing_rpms.list
if [ $? -ne 0 ]; then
echo "Error getting list of rpms installed prior to upgrade"
return 1
fi
umount $tmpdir/union > /dev/null 2>&1
umount $tmpdir/squash > /dev/null 2>&1
return 0
}
function move_files() {
for i in $*; do
dir=`dirname $i`
[ "$dir" = "." ] || mkdir -p ..keep/$dir
mv $i ..keep/$dir
done
}
function remove_non_user_nor_config_files() {
cd $tmpdir/user
rm -rf $config_files_to_remove
if [ -e ..keep ]; then
mv ..keep ..keep.bak
fi
if [ -e ..keep ]; then
echo "remove_non_user_nor_config_files can't work with existing temp dir"
return 1
fi
mkdir ..keep
move_files $config_files_network_scripts
rm -rf etc/sysconfig/network-scripts
move_files home $config_files
rm -rf *
rm -rf .[^.]*
mv ..keep/* .
rmdir ..keep
cd -
return 0
}
function copy_new_version() {
return 0
}
function merge_config_files() {
mount -t squashfs -o loop $sfs_loop $tmpdir/squash > /dev/null 2>&1
if [ $? -ne 0 ]; then
echo "Error mounting distrib.sqfs"
return 1
fi
./upgrade.merge-users $tmpdir/user/etc $tmpdir/squash/etc
return 0
}
function doit() {
if [ -d $tmpdir/user/var/lib/rpm/Packages ]; then
get_existing_rpms || return 1
fi
remove_non_user_nor_config_files || return 1
copy_new_version
merge_config_files || return 1
return 0
}
function cleanup() {
cd /
umount $tmpdir/union > /dev/null 2>&1
umount $tmpdir/user > /dev/null 2>&1
umount $tmpdir/squash > /dev/null 2>&1
umount $rootdir > /dev/null 2>&1
rmdir $tmpdir/union $tmpdir/user $tmpdir/squash 2> /dev/null
rmdir $rootdir $tmpdir 2> /dev/null
}
clear
trap cleanup SIGINT
version=""
if ! insert_pendrive; then
exit 1
fi
if [ x"$version" = x"1.0" ]; then
sys_loop="$rootdir/loopbacks/system.loop"
sfs_loop="$rootdir/loopbacks/distrib.sqfs"
else
sys_loop="$rootdir/.loopbacks/system.loop"
sfs_loop="$rootdir/.loopbacks/distrib.sqfs"
fi
if ! prepare; then
cleanup
exit 1
fi
if ! doit; then
cleanup
exit 1
fi
cleanup
exit 0
|
