From b9d6336526ba03c32704c8a5e2f856cdda4107fa Mon Sep 17 00:00:00 2001
From: HubretXie <xiexianbinwin@outlook.com>
Date: Thu, 1 Nov 2018 14:23:30 +0800
Subject: [PATCH] Update at_socket.c
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at接收超时 添加   EAGAIN  类型返回
---
 components/net/at/at_socket/at_socket.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/net/at/at_socket/at_socket.c b/components/net/at/at_socket/at_socket.c
index 6fd2e765d..6357caa66 100644
--- a/components/net/at/at_socket/at_socket.c
+++ b/components/net/at/at_socket/at_socket.c
@@ -668,6 +668,7 @@ int at_recvfrom(int socket, void *mem, size_t len, int flags, struct sockaddr *f
         if (rt_sem_take(sock->recv_notice, timeout) < 0)
         {
             LOG_E("AT socket (%d) receive timeout (%d)!", socket, timeout);
+            errno = EAGAIN;
             result = -1;
             goto __exit;
         }
-- 
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