Script to check SHA sums for the files in the current directory. #bin #sh

shachk

#!/bin/bash
#
# @file shachk
#
# Check SHA sums for the files in the current directory.
#
set -eu
set -o pipefail

algorithm=512

find . -type f ! -path '*/.*' -print0 | while IFS= read -r -d '' file; do
  case "$file" in
    *.sha1|*.sha224|*.sha256|*.sha384|*.sha512)
      ;;
    *)
      dir=$(dirname "$file")
      filename=$(basename "$file")
      (
        cd "$dir"

        shafile=
        for alg in 512 256 384 224 1; do
          if [ -f ".$filename.sha$alg" ]; then
            shafile=".$filename.sha$alg"
            break
          fi
        done

        if [ -f "$shafile" ]; then
          if shasum -s -c "$shafile"; then
            echo "$file: OK"
          else
            echo "$file: FAILED"
          fi
        else
          shafile=".$filename.sha$algorithm"
          shasum -a $algorithm "$filename" >"$shafile"
          echo "$file: GENERATED"
        fi
      )
      ;;
  esac
done