scripts/sha256sum

   1 #!/usr/bin/env bash
   2 # This file is part of the OpenADK project. OpenADK is copyrighted
   3 # material, please see the LICENCE file in the top-level directory.
   4
   5 if [ -x /usr/bin/sha256sum ]; then
   6         /usr/bin/sha256sum "$@"
   7 elif [ -x /bin/cksum ] && [ $(echo | cksum -a sha256) = 01ba4719c80b6fe911b091a7c05124b64eeece964e09c058ef8f9805daca546b ]; then
   8         # we assume the arguments are exactly "-c" or "-c -"
   9         x=$(sed 's/^\([0-9a-fA-F]*\) *\([^ ].*\)$/SHA256 (\2) = \1/' | cksum -c -a sha256)
  10         [[ $x = *FAILED* ]] && exit 1
  11         exit 0
  12 else
  13         tmp=$(mktemp -t yyy)
  14         cat - > $tmp
  15         shasum -a 256 "$@" $tmp
  16 fi