#!/bin/sh
#
# SPDX-License-Identifier: Apache-2.0
#
# Copyright (C) 2015, ARM Limited and contributors.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# Control groups mount point
CGMOUNT=${CGMOUNT:-/sys/fs/cgroup/devlib_*}
# The control group we want to run into
CGP=${1}
# The command to run
CMD=${2}

# Execution under root CGgroup
if [ "x/" == "x$CGP" ]; then

  find $CGMOUNT -type d -maxdepth 0 | \
  while read CGPATH; do
    # Move this shell into that control group
    echo $$ > $CGPATH/cgroup.procs
    echo "Moving task into root CGroup ($CGPATH)"
  done

# Execution under specified CGroup
else

  # Check if the required CGroup exists
  find $CGMOUNT -type d -mindepth 1 | \
  grep $CGP &>/dev/null
  if [ $? -ne 0 ]; then
    echo "ERROR: could not find any $CGP cgroup under $CGMOUNT"
    exit 1
  fi

  find $CGMOUNT -type d -mindepth 1 | \
  grep $CGP | \
  while read CGPATH; do
      # Move this shell into that control group
      echo $$ > $CGPATH/cgroup.procs
      echo "Moving task into $CGPATH"
  done

fi

# Execute the command
$CMD