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#!/bin/sh
#set -e
Read_only ()
{
for _PARAMETER in ${LIVE_BOOT_CMDLINE}
do
case "${_PARAMETER}" in
live-boot.read-only=*|read-only=*)
LIVE_READ_ONLY="true"
LIVE_READ_ONLY_DEVICES="${_PARAMETER#*read-only=}"
;;
live-boot.read-only|read-only)
LIVE_READ_ONLY="true"
;;
esac
done
case "${LIVE_READ_ONLY}" in
true)
;;
*)
return 0
;;
esac
# Marking some block devices as read-only to ensure that nothing
# gets written as linux still writes to 'only' read-only mounted filesystems.
LIVE_READ_ONLY_DEVICES="${LIVE_READ_ONLY_DEVICES:-/dev/sd* /dev/vd*}"
for _DEVICE in $(echo ${LIVE_READ_ONLY_DEVICES} | sed -e 's|,| |g')
do
if [ ! -b "${_DEVICE}" ]
then
continue
fi
echo -n "live-boot: Setting ${_DEVICE} read-only..." > /dev/console
blockdev --setro ${_DEVICE}
_RETURN="${?}"
case "${_RETURN}" in
0)
echo " done, use 'blockdev --setrw ${_DEVICE}' to set read-write." > /dev/console
;;
*)
echo " failed." > /dev/console
;;
esac
done
}
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