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#! /usr/bin/env sh
main()
{
# Handle opts
opts "$@"
shift "$OPTS"
unset OPTS
# Show help
[ "$OPT_HELP_ONLY" ] && usage && exit 0
[ -z "$1" ] && usage && exit 1
printf "md5 %s\n" "$(md5sum "$1" | cut -f1 -d" ")"
printf "sha1 %s\n" "$(sha1sum "$1" | cut -f1 -d" ")"
printf "sha224 %s\n" "$(sha224sum "$1" | cut -f1 -d" ")"
printf "sha256 %s\n" "$(sha256sum "$1" | cut -f1 -d" ")"
printf "sha384 %s\n" "$(sha384sum "$1" | cut -f1 -d" ")"
printf "sha512 %s\n" "$(sha512sum "$1" | cut -f1 -d" ")"
}
opts()
{
OPTS=0
while getopts ":h" opt
do
case "$opt" in
h) OPT_HELP_ONLY=1 ;;
*)
printf "Invalid option passed: %s\n" "$OPTARG" >&2
;;
esac
done
}
usage()
{
cat <<EOF
Usage:
$(basename "$0") -h
$(basename "$0") <file>
Make a number of checksums of a given file.
EOF
}
main "$@"
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