From 04266f09b0d2c31d6cfb6148eada4550fe478f29 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Fri, 18 Mar 2022 17:56:14 -0700
Subject: configure: bugfix in shell escaping code

* configure: in the case when the argument contains
single quotes, we try to identify the subcase that cannot use
double quotes instead. That subcase is not correctly
identified: it occurs when there are double quotes, dollar
signs **or backslashes**. For instance the data '\ cannot
be put into double quotes as "'\" on account of the backslash,
which is an active character in double quotes. We also
simplify the pattern by using a character class.
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index f001ba97..41533afb 100755
--- a/configure
+++ b/configure
@@ -92,7 +92,7 @@ for arg in "$0" ${@+"$@"} ; do
   case $arg in
   *"'"* )
     case $arg in
-    *'"'* | *'$'* )
+    *[\"\$\\]* )
       cmdline="$cmdline'$(printf "%s" "$arg" | sed -e "s/'/'\\\\''/g")'"
       ;;
     * )
-- 
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