#!/usr/bin/env bash
# Optional cgroup development launcher, independent of any init system.
set -euo pipefail
if (( $# == 0 )); then
    echo 'Usage: bash tests/run-delegated-reader.sh /absolute/path/to/cthulhu [reader options]' >&2
    exit 2
fi
if [[ $1 != /* || ! -x $1 ]]; then
    echo 'The reader executable must be an absolute executable path.' >&2
    exit 2
fi
parent=${CTHULHU_TENTACLE_CGROUP_PARENT:-}
if [[ $parent != /* || ! -d $parent || ! -w $parent ]]; then
    echo 'Set CTHULHU_TENTACLE_CGROUP_PARENT to an already delegated, writable cgroup v2 parent.' >&2
    echo 'Ordinary Tentacle use needs no launcher or cgroup setup.' >&2
    exit 2
fi
exec "$@" --tentacle-cgroup-parent "$parent"