[Qemu-devel] [PULL 2/2] error: Report certain hints on stderr when no monitor

[Markus Armbruster]

From: Marc-André Lureau <address@hidden>

Hints printed with error_printf_unless_qmp() are suppressed outside
monitor context.  Reproducer:

    $ qemu-system-x86_64 -m 1Z
    qemu-system-x86_64: -m 1Z: Parameter 'size' expects a size

Print to stderr instead.  The reproducer now additionally prints:

    You may use k, M, G or T suffixes for kilobytes, megabytes, gigabytes and 
terabytes.

Signed-off-by: Marc-André Lureau <address@hidden>
Message-Id: <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: Markus Armbruster <address@hidden>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <address@hidden>
---
 monitor.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/monitor.c b/monitor.c
index 0841d43..90c5baf 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3973,6 +3973,8 @@ void error_vprintf_unless_qmp(const char *fmt, va_list ap)
 {
     if (cur_mon && !monitor_cur_is_qmp()) {
         monitor_vprintf(cur_mon, fmt, ap);
+    } else if (!cur_mon) {
+        vfprintf(stderr, fmt, ap);
     }
 }
 
-- 
2.7.4