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|
#!/bin/sh
# Set up/shutdown the flashybrid system, including the ramdisk and partial
# directory bind mounts. This needs to run at the part of system bootup that
# mounts all the disks. It should also run at shutdown right before
# filesystems are unmounted.
CONFDIR=/etc/flashybrid
if [ -e $CONFDIR/config ]; then
. $CONFDIR/config
fi
ENABLED=no
if [ -e /etc/default/flashybrid ]; then
. /etc/default/flashybrid
fi
if [ -z "$RAMMOUNT" ]; then
exit 0
fi
is_mounted () {
grep -q " $1 " /proc/mounts
}
case "$1" in
start)
if [ "$ENABLED" != yes ]; then
echo "Not setting up flashybrid system: disabled."
exit
fi
printf "Setting up flashybrid system..."
# Set up partial directories and so on, make sure disk is
# unmounted.
fh-embed >/dev/null
# Set up ram disk to hold variable data.
if ! is_mounted $RAMMOUNT; then
mount tmpfs -t tmpfs $RAMMOUNT
fi
# Temporary directories on ram disk.
for dir in $(grep -v '^#' $CONFDIR/ramtmp); do
mkdir -p -m 1777 $RAMMOUNT/$dir
if is_mounted $dir; then
umount $dir
fi
mount --bind $RAMMOUNT/$dir $dir
done
# Copy data from flash to ram disk for these directories.
for dir in $(grep -v '^#' $CONFDIR/ramstore); do
# Skip dirs that are not present.
if [ -d $dir ]; then
ramdir=$RAMMOUNT$dir
if is_mounted $dir; then
umount $dir
fi
if is_mounted $ramdir.flash; then
umount $ramdir.flash
fi
if [ ! -d $ramdir ]; then
mkdir -p ${ramdir%/*} # dirname
cp -a $dir $ramdir
fi
mkdir -p $ramdir.flash
mount --bind $dir $ramdir.flash
mount --bind $ramdir $dir
fi
done
echo "done."
;;
stop)
if [ "$ENABLED" != yes ]; then
echo "Not shutting down flashybrid system: disabled."
exit
fi
printf "Shutting down flashybrid system..."
# Copy data to flash.
# Remount the flash read-write so the copies to it will work.
mount -o remount,rw /
for dir in $(grep -v '^#' $CONFDIR/ramstore); do
if [ -d $RAMMOUNT/$dir ] && [ -d $RAMMOUNT/$dir.flash ]; then
# rsync is used to avoid churning the flash
# unnecessarily. The trailing slashes are very
# important..
rsync --delete -a $RAMMOUNT/$dir/ $RAMMOUNT/$dir.flash/
fi
done
for dir in $(grep -v '^#' $CONFDIR/ramtmp); do
if is_mounted $dir; then
umount $dir
fi
done
for dir in $(grep -v '^#' $CONFDIR/ramstore); do
ramdir=$RAMMOUNT$dir
if is_mounted $ramdir.flash; then
umount $ramdir.flash
fi
if is_mounted $dir; then
umount $dir
fi
done
if is_mounted $RAMMOUNT; then
umount $RAMMOUNT
fi
echo "done."
;;
restart|force-reload)
$0 stop
$0 start
;;
*)
echo "Usage: $0 {start|stop|restart|force-reload}"
exit 1
;;
esac
|
