Re: [Buildroot] [PATCH] support/download/post-process-helpers: adjust for older coreutils versions

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Clayton, All,

On 2022-02-10 17:23 -0600, Clayton Shotwell spake thusly:
> From: Clayton Shotwell <clayton.shotwell@collins.com>
> 
> Ran into an issue with the post_process_unpack function using "head -z"
> on a RHEL box which is using an older version or coreutils. The "-z"
> flag was added in coreutils v8.25 but my IT managed RHEL box is only
> using v8.22. The fix I have implemented relies on the null terminated
> list and sed to remove the first null character and everthing
> afterwards.

coreutils v8.25 were released 2016-01-20, more than 6 years ago now, and
v8.22 were released 2013-12-13, more than eight years ago.

That is sad that you have to use an up-to-date Buildroot (even one that
is not even yet released!) with such an old system... :-/

> Signed-off-by: Clayton Shotwell <clayton.shotwell@collins.com>
> ---
>  support/download/helpers | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/support/download/helpers b/support/download/helpers
> index ab31e27..90a7d6c 100755
> --- a/support/download/helpers
> +++ b/support/download/helpers
> @@ -79,7 +79,7 @@ post_process_unpack() {
>  
>      mkdir "${dest}"
>      tar -C "${dest}" --strip-components=1 -xzf "${tarball}"
> -    one_file="$(find "${dest}" -type f -print0 |LC_ALL=C sort -z |head -z -n1 |tr -d "\0")"
> +    one_file="$(find "${dest}" -type f -print0 |LC_ALL=C sort -z |sed 's/\x0.*//')"

As far as I know, hexa needs two digits to represent a byte, so \x00

    http://sed.sourceforge.net/grabbag/tutorials/sedfaq.txt

    4.2. How do I represent control-codes or nonprintable characters?

    Several versions of sed support the notation \xHH, where "HH" are
    two hex digits, 00-FF [...]

So I fixed that, and applied to master,  with a rewokred commit log,
thanks.

Regards,
Yann E. MORIN.

>      touch -r "${one_file}" "${dest}.timestamp"
>  }
>  
> -- 
> 1.8.3.1
> 

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