#!/bin/sh
if [ "$(id -u)" != "0" ]; then
    echo "" >&2
    echo "\"lxc file mount\" with SSHFS can only be used as root in the LXD snap." >&2
    echo  "For use as a regular user, please use the --listen option instead." >&2
    echo "" >&2
    exit 1
fi

# Turn `/usr/sbin/foo` into `foo`
# Similar to `basename` but using variable substitution instead of external executable
CMD="${0##*/}"

unset LD_LIBRARY_PATH
export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

FOUND=0
for path in $(echo "${PATH}" | tr ':' '\n'); do
    if [ -e "/var/lib/snapd/hostfs${path}/sshfs" ]; then
         FOUND=1
         break
    fi
done

if [ "${FOUND}" = "0" ]; then
    echo "" >&2
    echo "sshfs couldn't be found on the system." >&2
    echo "Install sshfs or use the --listen option instead." >&2
    echo "" >&2
    exit 1
fi

shift 2
SRC="${1}"
shift
DST="${1#/var/lib/snapd/hostfs}"
shift

exec nsenter -t 1 -m "${CMD}" -o slave "${SRC}" "${DST}" "$@"