From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 7 Jan 2012 02:08:18 +0000 (+0000)
Subject: keyfunc.sh: Protect arguments to expr(1).
X-Git-Tag: 0.99.2~49
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/distorted-keys/commitdiff_plain/11c7b588618f2bddd4184def529c15d65cccefa4

keyfunc.sh: Protect arguments to expr(1).

Make sure they don't look like operators or functions.
---

diff --git a/keyfunc.sh.in b/keyfunc.sh.in
index 38ca243..2a10f26 100644
--- a/keyfunc.sh.in
+++ b/keyfunc.sh.in
@@ -144,7 +144,7 @@ check () {
   validp=t
   case "$thing" in
     *"$nl"*) validp=nil ;;
-    *) if ! expr >/dev/null "$thing" : "$ckpat\$"; then validp=nil; fi ;;
+    *) if ! expr >/dev/null "Q$thing" : "Q$ckpat\$"; then validp=nil; fi ;;
   esac
   case $validp in
     nil) echo >&2 "$quis: bad $ckwhat \`$thing'"; exit 1 ;;