Re: [PATCH] scripts/config: allow colons in option strings for sed

From: Randy Dunlap
Date: Fri Apr 10 2020 - 13:36:30 EST


[adding Cc's]

On 4/10/20 9:57 AM, Jeremie Francois (on alpha) wrote:
> Sed broke on some strings as it used colon as a separator.
> I made it more robust by using \001, which is legit POSIX AFAIK.
>
> E.g. ./config --set-str CONFIG_USBNET_DEVADDR "de:ad:be:ef:00:01"
> failed with: sed: -e expression #1, char 55: unknown option to `s'
>
> Signed-off-by: Jeremie Francois (on alpha) <jeremie.francois@xxxxxxxxx>
> ---
> scripts/config | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/config b/scripts/config
> index e0e39826dae9..d365081b60b2 100755
> --- a/scripts/config
> +++ b/scripts/config
> @@ -7,6 +7,9 @@ myname=${0##*/}
> # If no prefix forced, use the default CONFIG_
> CONFIG_="${CONFIG_-CONFIG_}"
>
> +# We use an uncommon delimiter for sed substitutions
> +SED_DELIM=$(echo -en "\001")
> +
> usage() {
> cat >&2 <<EOL
> Manipulate options in a .config file from the command line.
> @@ -83,7 +86,7 @@ txt_subst() {
> local infile="$3"
> local tmpfile="$infile.swp"
>
> - sed -e "s:$before:$after:" "$infile" >"$tmpfile"
> + sed -e "s$SED_DELIM$before$SED_DELIM$after$SED_DELIM" "$infile" >"$tmpfile"
> # replace original file with the edited one
> mv "$tmpfile" "$infile"
> }
>


--
~Randy