Re: [PATCH 7/8] configure: quote command line arguments in config.status

[Eric Blake <eblake@redhat.com>]

On 1/7/21 8:00 AM, Paolo Bonzini wrote:
> Make config.status generation a bit more robust.  (The quote_sh
> function will also be reused to parse configure's command line
> arguments in an external script driven by Meson build option
> introspection).
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  configure | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/configure b/configure
> index d573058b16..41866cc38e 100755
> --- a/configure
> +++ b/configure
> @@ -89,6 +89,10 @@ printf " '%s'" "$0" "$@" >> config.log
>  echo >> config.log
>  echo "#" >> config.log
>  
> +quote_sh() {
> +    printf "%s" "$1" | sed "s,','\\\\'',g; s,.*,'&',"
> +}

printf %s does not append a newline, but POSIX does not require sed to
behave sanely when its input does not end in a newline.

But unless we hit a case where someone is actually using a sed that
complains, this works for me.

Reviewed-by: Eric Blake <eblake@redhat.com>

-- 
Eric Blake, Principal Software Engineer
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