Re: [PATCH] md5sum,b2sum,sha*sum: support -s option

[Michael Stone]

On Mon, Jun 25, 2018 at 12:23:29AM -0300, Carlos Santos wrote:
> I stumbled on it when attempted to write a script that uses sha256sum
> and needs to work both on Fedora 7 and on an embedded system built with
> Buildroot. It's necessary to test where sha256sum comes from and use a
> variable for the status argument:
>
>    if sha256sum --help 2>&1 | fgrep -q BusyBox; then
>        s_arg="-s" # BusyBox
>    else
>        s_arg="--status" # coreutils
>    fi
>    echo "${checksum}  ${img_file}" | sha256sum -c "${s_arg}" -w

Can't you just skip both options and direct output to /dev/null?

Mike Stone