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#!/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME=overlay_syncd
DESC="overlay sync"
# Possible problem with overlayfs:
# when using overlays deleting existing in the lower layer dirs can cause error (hopefully it gets fixed someday):
# example:
# * /mnt/sda1 exists in lower layer: /tmp/rootfs.ro/tmp
# * upper layer is mounted to /
# # rmdir /mnt/sda1
# # mkdir /mnt/sda1
# mkdir: cannot create directory '/mnt/sda1': Operation not supported
sync_files () {
rsync -av --exclude=mnt --exclude=tmp --exclude=dev --exclude=var --exclude=run /tmp/rootfs.rw/upperdir/ /tmp/rootfs.ro/
}
case "$1" in
start)
echo -n "Starting $DESC: "
echo "$NAME:"
;;
stop)
echo -n "Stopping $DESC: "
echo "$NAME."
if [ -f /tmp/overlay_sync ]; then
if [ -d /tmp/rootfs.ro ]; then
sync_files
fi
fi
;;
restart)
echo -n "Restarting $DESC: "
echo "$NAME."
;;
status)
echo -n "$NAME status:"
if [ -f /var/run/$NAME ]; then
echo -n "Running"
else
echo -n "Not running"
fi
;;
sync)
if [ -f /tmp/overlay_sync ]; then
if [ -d /tmp/rootfs.ro ]; then
sync_files
fi
fi
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|status|sync}" >&2
exit 1
;;
esac
exit 0