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 <s...@linux.ibm.com> Signed-off-by: Collin Walling <wall...@linux.ibm.com> --- monitor.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/monitor.c b/monitor.c index 7af1f18..deeb41c 100644 --- a/monitor.c +++ b/monitor.c @@ -1013,6 +1013,7 @@ static void help_cmd_dump(Monitor *mon, const mon_cmd_t *cmds, char **args, int nb_args, int arg_index) { const mon_cmd_t *cmd; + size_t i; /* No valid arg need to compare with, dump all in *cmds */ if (arg_index >= nb_args) { @@ -1034,9 +1035,15 @@ static void help_cmd_dump(Monitor *mon, const mon_cmd_t *cmds, } else { help_cmd_dump_one(mon, cmd, args, arg_index); } - break; + return; } } + + /* Command not found */ + monitor_printf(mon, "unknown command: '"); + for (i = 0; i <= arg_index; i++) { + monitor_printf(mon, "%s%s", args[i], i == arg_index ? "'\n" : " "); + } } static void help_cmd(Monitor *mon, const char *name) -- 2.7.4