Re: [PATCH 08/24] perf daemon: Add background support

[Jiri Olsa]

On Wed, Feb 03, 2021 at 06:16:11PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Sun, Jan 31, 2021 at 12:48:40AM +0100, Jiri Olsa escreveu:
> > Adding support to put daemon process in the background.
> > 
> > It's now enabled by default and -f option is added to
> > keep daemon process on the console for debugging.
> > 
> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> > ---
> >  tools/perf/builtin-daemon.c | 66 +++++++++++++++++++++++++++++++++++--
> >  1 file changed, 63 insertions(+), 3 deletions(-)
> > 
> > diff --git a/tools/perf/builtin-daemon.c b/tools/perf/builtin-daemon.c
> > index d0a0a998e073..324666058842 100644
> > --- a/tools/perf/builtin-daemon.c
> > +++ b/tools/perf/builtin-daemon.c
> > @@ -488,6 +488,13 @@ static void daemon__kill(struct daemon *daemon)
> >  	daemon__signal(daemon, SIGTERM);
> >  }
> >  
> > +static void __daemon__free(struct daemon *daemon)
> > +{
> > +	free(daemon->config_real);
> > +	free(daemon->config_base);
> > +	free(daemon->base);
> > +}
> 
> Please use zfree(), and also please rename it to __daemon__delete(), in
> other cases this pattern would be daemon__exit(), as the daemon
> structure itself is not being freed, just its members, ditto for
> foo__new() calling foo__init().

ok, will change

SNIP

> >  static int __cmd_start(struct daemon *daemon, struct option parent_options[],
> >  		       int argc, const char **argv)
> >  {
> > +	bool foreground = false;
> >  	struct option start_options[] = {
> > +		OPT_BOOLEAN('f', "foreground", &foreground, "stay on console"),
> 
> 
> You forgot to add the entry to the man page

it's in the man page patch later in the patchset

thanks,
jirka

> 
> >  		OPT_PARENT(parent_options),
> >  		OPT_END()
> >  	};
> > @@ -667,6 +716,17 @@ static int __cmd_start(struct daemon *daemon, struct option parent_options[],
> >  	if (setup_server_config(daemon))
> >  		return -1;
> >  
> > +	if (!foreground) {
> > +		err = go_background(daemon);
> > +		if (err) {
> > +			/* original process, exit normally */
> > +			if (err == 1)
> > +				err = 0;
> > +			__daemon__free(daemon);
> > +			return err;
> > +		}
> > +	}
> > +
> >  	debug_set_file(daemon->out);
> >  	debug_set_display_time(true);
> >  
> > -- 
> > 2.29.2
> > 
> 
> -- 
> 
> - Arnaldo
>