Re: [PATCH v5 13/24] monitor: refactor error_vprintf()

On Wed, Jan 14, 2026 at 12:34:14PM +0100, Markus Armbruster wrote:
> Daniel P. Berrangé <[email protected]> writes:
> 
> > The monitor_vprintf() code will return -1 if either the monitor
> > is NULL, or the monitor is QMP. The error_vprintf() code can
> > take advantage of this to avoid having to duplicate the same
> > checks, and instead simply look at the return value.
> >
> > Reviewed-by: Richard Henderson <[email protected]>
> > Signed-off-by: Daniel P. Berrangé <[email protected]>
> > ---
> >  monitor/monitor.c | 16 +++++++++-------
> >  1 file changed, 9 insertions(+), 7 deletions(-)
> >
> > diff --git a/monitor/monitor.c b/monitor/monitor.c
> > index 4d26cd9496..627a59b23e 100644
> > --- a/monitor/monitor.c
> > +++ b/monitor/monitor.c
> > @@ -268,17 +268,19 @@ void monitor_printc(Monitor *mon, int c)
> >      monitor_printf(mon, "'");
> >  }
> >  
> > -/*
> > - * Print to current monitor if we have one, else to stderr.
> > - */
> 
> Keep the comment, please.

I'll change it to say  "...to the current human monitor..."

> 
> >  int error_vprintf(const char *fmt, va_list ap)
> >  {
> >      Monitor *cur_mon = monitor_cur();
> > -
> > -    if (cur_mon && !monitor_cur_is_qmp()) {
> > -        return monitor_vprintf(cur_mon, fmt, ap);
> > +    /*
> > +     * This will return -1 if 'cur_mon' is NULL, or is QMP.
> > +     * IOW this will only print if in HMP, otherwise we
> > +     * fallback to stderr for QMP / no-monitor scenarios.
> > +     */
> > +    int ret = monitor_vprintf(cur_mon, fmt, ap);
> > +    if (ret == -1) {
> > +        ret = vfprintf(stderr, fmt, ap);
> >      }
> > -    return vfprintf(stderr, fmt, ap);
> > +    return ret;
> >  }
> >  
> >  static MonitorQAPIEventConf monitor_qapi_event_conf[QAPI_EVENT__MAX] = {
> 

With regards,
Daniel
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