util/chromeos/gen_test_hwid.sh

   1 #!/usr/bin/env sh
   2 #
   3 # SPDX-License-Identifier: GPL-2.0-only
   4
   5 main() {
   6   if [ "$#" != 1 ]; then
   7     echo "Usage: $0 MAINBOARD_PARTNUMBER" >&2
   8     exit 1
   9   fi
  10
  11   # Generate a test-only ChromeOS HWID v2 string
  12   local board="$1"
  13   local prefix="$(echo "${board}" | tr a-z A-Z) TEST"
  14   # gzip has second-to-last 4 bytes in CRC32.
  15   local crc32="$(printf "${prefix}" | gzip -1 | tail -c 8 | head -c 4 | \
  16                  od -An -vtu4 | tr -d '\n' | tail -c 4)"
  17
  18   echo "${prefix}" "${crc32}"
  19 }
  20 main "$@"