#!/bin/sh
# Fix for LP#150188

PREREQ=""
DESCRIPTION="Possibly disabling update-initramfs (useless on a live CD)..."

prereqs()
{
       echo "$PREREQ"
}

case $1 in
# get pre-requisites
prereqs)
       prereqs
       exit 0
       ;;
esac

. /scripts/casper-functions

log_begin_msg "$DESCRIPTION"

chroot /root dpkg-divert --add --rename --quiet \
        /usr/sbin/update-initramfs
# Running off a USB disk or other writable media.
if [ -w /root/cdrom ] && \
   # rw is guaranteed to be first.
   grep -q ' /root/cdrom rw[, ]' /proc/self/mountinfo; then
	cat > /root/usr/sbin/update-initramfs <<'EOF'
#! /bin/sh
set -e
update-initramfs.distrib "$@"
if [ -e /cdrom/casper/initrd.lz ]; then
    zcat /initrd.img | lzma -9c >/cdrom/casper/initrd.lz.new
    mv /cdrom/casper/initrd.lz.new /cdrom/casper/initrd.lz
else
    cp /initrd.img /cdrom/casper/initrd.gz.new
    mv /cdrom/casper/initrd.gz.new /cdrom/casper/initrd.gz
fi
cp /vmlinuz /cdrom/casper/vmlinuz.new
mv /cdrom/casper/vmlinuz.new /cdrom/casper/vmlinuz
exit 0
EOF
else
	cat > /root/usr/sbin/update-initramfs <<EOF
#! /bin/sh
echo "update-initramfs is disabled since running on read-only media"
exit 0
EOF
fi

chmod 755 /root/usr/sbin/update-initramfs

log_end_msg