linux-kernel - [PATCH] scripts/config: allow colons in option strings for sed

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Message-Id: <20200410165741.27078-1-jeremie.francois@gmail.com>
Date:   Fri, 10 Apr 2020 18:57:40 +0200
From:   "Jeremie Francois (on alpha)" <jeremie.francois@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     "Jeremie Francois (on alpha)" <jeremie.francois@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] scripts/config: allow colons in option strings for sed

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@...il.com>
---
 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"
 }
-- 
2.17.1