From: Collin Walling <[email protected]> When a user incorrectly provides an hmp command, an error response will be printed that prompts the user to try "help <command name>". However, when the command contains multiple parts e.g. "info uuid xyz", only the last whitespace delimited string will be reported (in this example "info" will be dropped and the message will read "Try "help uuid" for more information", which is incorrect).
Let's correct this by capturing the entirety of the command from the command line -- excluding any extraneous characters. Reported-by: Mikhail Fokin <[email protected]> Signed-off-by: Collin Walling <[email protected]> Message-Id: <[email protected]> Reviewed-by: Eric Blake <[email protected]> Signed-off-by: Dr. David Alan Gilbert <[email protected]> --- monitor.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/monitor.c b/monitor.c index 885e000f9b..2a8187f5d7 100644 --- a/monitor.c +++ b/monitor.c @@ -3431,6 +3431,7 @@ static void handle_hmp_command(Monitor *mon, const char *cmdline) { QDict *qdict; const mon_cmd_t *cmd; + const char *cmd_start = cmdline; trace_handle_hmp_command(mon, cmdline); @@ -3447,8 +3448,11 @@ static void handle_hmp_command(Monitor *mon, const char *cmdline) qdict = monitor_parse_arguments(mon, &cmdline, cmd); if (!qdict) { - monitor_printf(mon, "Try \"help %s\" for more information\n", - cmd->name); + while (cmdline > cmd_start && qemu_isspace(cmdline[-1])) { + cmdline--; + } + monitor_printf(mon, "Try \"help %.*s\" for more information\n", + (int)(cmdline - cmd_start), cmd_start); return; } -- 2.17.1
