[Qemu-devel] [PATCH] monitor: print message when using 'help' with an unknown command

[Collin Walling <walling@linux.ibm.com>]

When typing 'help' followed by an unknown command, QEMU will
not print anything to the command line to let the user know
they typed a bad command. Let's fix this by printing a message
to the monitor when this happens. For example:

    (qemu) help xyz
    unknown command: 'xyz'

Reported-by: Stefan Zimmermann <stzi@linux.ibm.com>
Signed-off-by: Collin Walling <walling@linux.ibm.com>
---
 monitor.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/monitor.c b/monitor.c
index 7af1f18..7942f9f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1034,9 +1034,12 @@ static void help_cmd_dump(Monitor *mon, const mon_cmd_t *cmds,
             } else {
                 help_cmd_dump_one(mon, cmd, args, arg_index);
             }
-            break;
+            return;
         }
     }
+
+    /* Entry not found */
+    monitor_printf(mon, "unknown command: '%s'\n", args[arg_index]);
 }
 
 static void help_cmd(Monitor *mon, const char *name)
-- 
2.7.4