From 08c3dbe2ba6645fb5274eb428a8bde81b8b18b00 Mon Sep 17 00:00:00 2001
From: Dong Heng <dongheng@espressif.com>
Date: Mon, 14 May 2018 15:50:55 +0800
Subject: [PATCH] feat(newlib): Initialize environ

---
 components/newlib/newlib/port/esp_newlib.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/components/newlib/newlib/port/esp_newlib.c b/components/newlib/newlib/port/esp_newlib.c
index 3425de64..f93e32cf 100644
--- a/components/newlib/newlib/port/esp_newlib.c
+++ b/components/newlib/newlib/port/esp_newlib.c
@@ -14,7 +14,9 @@
 
 #include <reent.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 /*
  * @brief Initialize global and thread's private reent object data. We add this instead of
@@ -57,8 +59,15 @@ int esp_newlib_init(void)
     if (!_GLOBAL_REENT->_stdin)
         goto err_in;
 
+    environ = malloc(sizeof(char*));
+    if (!environ)
+        goto environ_in;
+    environ[0] = NULL;
+
     return 0;
 
+environ_in:
+    fclose(_GLOBAL_REENT->_stdin);
 err_in:
     fclose(_GLOBAL_REENT->_stderr);
 err_fail: