From be68fbd4f5b65716a37a4a669e7a8ae960ebf07d Mon Sep 17 00:00:00 2001
From: neilpang <github@byneil.com>
Date: Sat, 12 Nov 2016 10:58:20 +0800
Subject: [PATCH] fix for alpine

---
 acme.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/acme.sh b/acme.sh
index e49a253..b4f0138 100755
--- a/acme.sh
+++ b/acme.sh
@@ -259,7 +259,8 @@ _exists() {
 
 #a + b
 _math() {
-  printf "%s" "$(($@))"
+  _m_opts="$@"
+  printf "%s" "$(($_m_opts))"
 }
 
 _h_char_2_dec() {