From 694af4aeb108386e9b41d0baa319fb9bfc111976 Mon Sep 17 00:00:00 2001
From: neilpang <neil@neilpang.com>
Date: Wed, 7 Feb 2018 21:12:49 +0800
Subject: [PATCH] fix https://github.com/Neilpang/acme.sh/issues/1234

---
 acme.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/acme.sh b/acme.sh
index 2a0a7ff0..0874edc0 100755
--- a/acme.sh
+++ b/acme.sh
@@ -5163,8 +5163,14 @@ install() {
   if [ -z "$NO_DETECT_SH" ]; then
     #Modify shebang
     if _exists bash; then
+      _bash_path="$(bash -c "command -v bash 2>/dev/null")"
+      if [ -z "$_bash_path" ]; then
+        _bash_path="$(bash -c 'echo $SHELL')"
+      fi
+    fi
+    if [ "$_bash_path" ]; then
       _info "Good, bash is found, so change the shebang to use bash as preferred."
-      _shebang='#!'"$(bash -c "command -v bash")"
+      _shebang='#!'"$_bash_path"
       _setShebang "$LE_WORKING_DIR/$PROJECT_ENTRY" "$_shebang"
       for subf in $_SUB_FOLDERS; do
         if [ -d "$LE_WORKING_DIR/$subf" ]; then