#!/usr/bin/bash

# Copyright Amazon.com, Inc. and its affiliates. All Rights Reserved.
#
# Licensed under the MIT License. See the LICENSE accompanying this file
# for the specific language governing permissions and limitations under
# the License.

# Expected input is partition's kernel name like nvme0n1p2 or nvme0n1, output would be 1

if [[ $# -ne 1 ]]; then
  exit 1
else
  kernel_name=$1

  # Remove nvme prefix (also deals with any /dev that might accidentally get passed in)
  prefix_removed=${kernel_name#*nvme*n}
  
  # Remove partition suffix
  NSID=${prefix_removed%p*}

  echo "_NS_ID=${NSID}"
fi