#!/bin/bash
#
# Share a directory tree with an overlay-boot subhost
#
# $1 = directory $2 = subhost

set -e

. $(dirname $(realpath $0))/functions

if [ ! -d "$1" ] ; then
   echo "** Not a directory: $1" >&2
   exit 1
fi

SHARE="$1"
NAME="$2"

[ -z "$NAME" ] && echo "Select subhost: $(list_running)" && exit 0

read USPID RSPID <<EOF
$(is_live $NAME)
EOF
[ -z "$USPID" ] && echo "$NAME is not running" >&2 && exit 1
if [ -z "$RSPID" ] ; then
    cat <<EOF >&2
***  $NAME is started (pid $USPID) but doesn't seem to be running
*** /.reaper and might need manual fixing.
EOF
    exit 1
fi

sudo nsenter -t "$RSPID" -n -m -p /bin/bash <<EOF
set -e
LIVE=\$(awk '\$1=="$NAME" && \$3=="overlay" {print \$2;}' < /proc/mounts)
[ -d "\$LIVE" ] && mount --bind $SHARE "\$LIVE$SHARE"
EOF
echo "Sharing $SHARE with subhost $NAME"
exit 0