From 8ad1f163fac75461a216cce5aedabd22b9bf91e2 Mon Sep 17 00:00:00 2001
From: chenwei <chadwill@aliyun.com>
Date: Mon, 9 Apr 2018 11:22:26 +0800
Subject: [PATCH] API: [BugFix] On success, `ff_sendmsg` return the number of
 chars sent.

---
 lib/ff_syscall_wrapper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/ff_syscall_wrapper.c b/lib/ff_syscall_wrapper.c
index 3e1e484d..cfc407c1 100644
--- a/lib/ff_syscall_wrapper.c
+++ b/lib/ff_syscall_wrapper.c
@@ -625,6 +625,8 @@ ff_sendmsg(int s, const struct msghdr *msg, int flags)
     if (rc)
         goto kern_fail;
 
+    rc = curthread->td_retval[0];
+
     return (rc);
 kern_fail:
     ff_os_errno(rc);