From 8fabcbb40c343e9236ff5a2769ec0174d16852f7 Mon Sep 17 00:00:00 2001
From: Bo Cai <cai.bo@h3c.com>
Date: Wed, 9 Dec 2015 17:46:16 +0800
Subject: [PATCH] ceph-fuse:print usage information when no parameter specified

Signed-off-by: Bo Cai <cai.bo@h3c.com>
---
 src/ceph_fuse.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ceph_fuse.cc b/src/ceph_fuse.cc
index 4d166ebd3889d..3339bd500b030 100644
--- a/src/ceph_fuse.cc
+++ b/src/ceph_fuse.cc
@@ -47,6 +47,10 @@ int main(int argc, const char **argv, const char *envp[]) {
   //cerr << "ceph-fuse starting " << myrank << "/" << world << std::endl;
   vector<const char*> args;
   argv_to_vec(argc, argv, args);
+  if (args.empty()) {
+    usage();
+    return 0;
+  }
   env_to_vec(args);
 
   global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, CODE_ENVIRONMENT_DAEMON,