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#!/bin/bash
shopt -s extglob nullglob
if [[ ${1:0:1} == - ]]; then
v=$1
shift 1
else
v=
fi
function df_() {
free=$(df -B1 "$1")
free=${free% *%*}
free=${free%%*( )}
free=${free##* }
echo "${free}"
}
function mv_() {
src=$1
mkdir -p /var/stash
dst=$(mktemp -d /var/stash/$(basename "${src}").XXXXXX)
if [[ -e ${src} ]]; then
chmod --reference="${src}" "${dst}"
chown --reference="${src}" "${dst}"
cp -aT $v "${src}" "${dst}" || {
rm -rf "${dst}"
exit 1
}
rm -rf $v "${src}"
else
chmod 775 "${dst}"
chown root.admin "${dst}"
fi
ln -s "${dst}" "${src}"
}
function shift_() {
dir=$1
if [[ -d ${dir} && ! -h ${dir} ]]; then
used=$(du -bs "${dir}")
used=${used%%$'\t'*}
free=$(df_ /var)
if [[ $((used + 524288)) -lt ${free} ]]; then
mv_ "${dir}"
fi
elif [[ ! -e ${dir} ]]; then
rm -f "${dir}"
mv_ "${dir}"
fi
}
shift_ "$@"
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