replicant-vendor_replicant/prebuilt/common/bin/backuptool.sh
eyeballer 018b5b62c4 backuptool.sh: Improve check for whether /system is mounted.
Fixes unable to flash an update.zip over a formatted /system

Change-Id: Ia163262585cb2ef414c6996837834c512d774243
2012-04-11 19:15:32 -04:00

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#!/sbin/sh
#
# Backup and restore addon /system files
#
export C=/tmp/backupdir
export S=/system
export V=9
# Mount /system if it is not already mounted
mount_system() {
if ! mount | grep -q " $S " ; then
mount $S
fi
}
# Unmount /system unless it is already unmounted
umount_system() {
if mount | grep -q " $S " ; then
umount $S
fi
}
# Preserve /system/addon.d in /tmp/addon.d
preserve_addon_d() {
mkdir -p /tmp/addon.d/
cp -a /system/addon.d/* /tmp/addon.d/
chmod 755 /tmp/addon.d/*.sh
}
# Restore /system/addon.d in /tmp/addon.d
restore_addon_d() {
cp -a /tmp/addon.d/* /system/addon.d/
rm -rf /tmp/addon.d/
}
# Proceed only if /system is the expected major version
check_prereq() {
if ( ! grep -q "^ro.cm.version=$V.*" /system/build.prop ); then
echo "Not backing up files from incompatible version."
umount_system
exit 127
fi
}
# Execute /system/addon.d/*.sh scripts with $1 parameter
run_stage() {
for script in $(find /tmp/addon.d/ -name '*.sh' |sort -n); do
$script $1
done
}
case "$1" in
backup)
mkdir -p $C
mount_system
check_prereq
preserve_addon_d
run_stage pre-backup
run_stage backup
run_stage post-backup
umount_system
;;
restore)
mount_system
check_prereq
run_stage pre-restore
run_stage restore
run_stage post-restore
restore_addon_d
umount_system
rm -rf $C
sync
;;
*)
echo "Usage: $0 {backup|restore}"
exit 1
esac
exit 0