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diff --git acme.sh acme.sh
index 3316b25fa9..02986a332d 100755
--- acme.sh
+++ acme.sh
@@ -436,14 +436,28 @@ _secure_debug3() {
fi
}
+__USE_TR_TAG=""
+if [ "$(echo "abc" | LANG=C tr a-z A-Z 2>/dev/null)" != "ABC" ] ; then
+ __USE_TR_TAG="1"
+fi
+export __USE_TR_TAG
+
_upper_case() {
+ if [ "$__USE_TR_TAG" ]; then
+ LANG=C tr '[:lower:]' '[:upper:]'
+ else
# shellcheck disable=SC2018,SC2019
- tr '[a-z]' '[A-Z]'
+ LANG=C tr '[a-z]' '[A-Z]'
+ fi
}
_lower_case() {
- # shellcheck disable=SC2018,SC2019
- tr '[A-Z]' '[a-z]'
+ if [ "$__USE_TR_TAG" ]; then
+ LANG=C tr '[:upper:]' '[:lower:]'
+ else
+ # shellcheck disable=SC2018,SC2019
+ LANG=C tr '[A-Z]' '[a-z]'
+ fi
}
_startswith() {
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