ceph: report error string to stderr, not stdout

If we return an error, send the message to stderr.  This makes things
more easily scriptable because error messages won't take the place of
expected output.

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/src/tools/common.cc b/src/tools/common.cc
index 9679f08834eded68b2f2ce58eb485a9f2c8e1af8..9a3763a34aeaf8b2aaa6c70d5a25c8f890da2e39 100644 (file)
--- a/src/tools/common.cc
+++ b/src/tools/common.cc
@@ -294,8 +294,12 @@ int do_command(CephToolCtx *ctx,
           << reply_from.name << " -> '"
           << reply_rs << "' (" << reply_rc << ")"
           << std::endl;
-  else
-    cout << reply_rs << std::endl;
+  else {
+    if (reply_rc >= 0)
+      cout << reply_rs << std::endl;
+    else
+      cerr << reply_rs << std::endl;
+  }
 
   return reply_rc;
 }