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|
#!/bin/sh
#set -x
ROOTMOUNTPT=/media/realroot
REALMOUNT=/bin/mount.busybox
UNIONMOUNT=$0
INCDIRS="^/media/\|^/mnt/"
DEVICE="\/dev\/"
newargs=""
ONESHIFTARGS='aVhvfFilnsrw'
TWOSHIFTARGS="pLUtOo"
IGNOREARGS='--bind --move'
resolvelink () {
if test -h $1; then
echo `readlink $1`
else
echo $1
fi
}
# Retrieves arguments/mount-point
for var in $@; do
if [ -z "$SKIP" ]; then
if echo $var | grep -q "^-.*"; then
# argument is an option
if echo $var | grep -q "[$TWOSHIFTARGS]"; then
SKIP="yes"
fi
# mount -a
if echo $var | grep -q "^-[^- ]*a"; then
DO_FSTAB="yes"
fi
ARGS="$ARGS $var"
else
if [ -z "$MOUNT_POINT" ]; then
# argument apears to be the mountpoint
MOUNT_POINT=$var
else
# A mountpoint was found earlier, so the other non-option
# must be the real mountpoint, and the first non-option is a device
DEV_PATH="$MOUNT_POINT"
MOUNT_POINT="$var"
fi
fi
else
ARGS="$ARGS $var"
unset SKIP
fi
done
# Parse fstab if -a is used
if ! [ -z "$DO_FSTAB" ]; then
# FIXME: This doesn't handle -t or -O
awk '/^[^ #]/ {print "-t " $3 " -o " $4 " " $1 " " $2}' /etc/fstab |
while read line; do
${UNIONMOUNT} $line
done
exit 0
fi
# Get mount-point for device name, if device name is given
if echo "$MOUNT_POINT" | grep -q "^${DEVICE}"; then
MOUNT_POINT_TEMP=`echo $MOUNT_POINT | sed -e "s/\//\\\\\\\\\//g"`
NEW_MOUNT_POINT=`awk "/$MOUNT_POINT_TEMP/ {print "'$2'"}" /etc/fstab`
if ! [ -z "$NEW_MOUNT_POINT" ]; then
MOUNT_POINT=$NEW_MOUNT_POINT
fi
fi
# Mount anything but /media/* and / with the real mount
if ! (echo "$MOUNT_POINT" | grep -q "$INCDIRS" || [ "$MOUNT_POINT" = "/" ]); then
exec ${REALMOUNT} $@
fi
# Replace requests to mount '/' (from init scripts and such)
# with mount ROOTMOUNTPT (the real-root mount point for the
# unionfs'd system).
packagedir=""
if ([ "$MOUNT_POINT" = "/" ] || [ "$MOUNT_POINT" = "${ROOTMOUNTPT}" ]); then
MOUNT_POINT=${ROOTMOUNTPT}
else
# FIXME: A hard-coded path is bad - see ipkg-link
PACKAGE_DIR="/packages"
x=a
fi
# Finally, mount and union-mount
#echo "<<DEBUG>> Running command: [${REALMOUNT} $ARGS $DEV_PATH $MOUNT_POINT]"
if ${REALMOUNT} $ARGS $DEV_PATH $MOUNT_POINT; then
if mkdir -p $MOUNT_POINT$PACKAGE_DIR; then
#echo "<<DEBUG>> Running command: [unionctl /. --add --after ${ROOTMOUNTPT} --mode rw `resolvelink $MOUNT_POINT`$PACKAGE_DIR]"
#unionctl /. --add --after ${ROOTMOUNTPT} --mode rw `resolvelink $MOUNT_POINT`$PACKAGE_DIR
unionctl /. --add `resolvelink $MOUNT_POINT`$PACKAGE_DIR
fi
fi
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