#!/bin/sh

echo -n "Saving configuration... "

if [ ! -f /etc/diskless ]
then
    echo "No flash setup detected."
    exit 1
fi

find_newer_files() {
  [ -d "${1}" ] || return 1
  find "${1}" -type f -not -regex '.*/tmp/*.' -newer /etc/diskless -print
}

archive() {
  [ -d "${1}" ] || return 1
  find_newer_files "${1}" | cpio -o | gzip -9 > "/conf/default/${1}.cpio.gz"
}

# Mount /conf read-write, and remount if it already is.
if [ $(grep -c /conf /etc/fstab) -gt 0 ]
then
        mount -w /conf
        if [ $? -ne 1 ]
        then
                umount /conf
                mount -w /conf
		_was_mounted=true
        fi
fi


# Unlimited history method: (make sure you have provisions for removing the old backups, or this can get HUGE!
dest="$(date -r "$(stat -f '%c' "/conf/default")" "+%Y-%m-%dT%H-%M-%S")"
mv /conf/default "/conf/backup/${dest}"

mkdir /conf/default

cd /
# Copy changed config files to /conf/default (anything younger than /etc/diskless)
#find etc var -type f -not -regex '.*/tmp/.*' -newer /etc/diskless -print0 | cpio -p /conf/default/
# This can be changed to allow compressed configuration here as well:
archive etc
archive var

# Umount /conf afterwards, if it wasn't mounted
if [ -z "${_was_mounted}" -a "$(mount |grep -c "/conf")" -gt 0 ]
then
        umount /conf
fi

echo "Done!"