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 <jo...@kernel.org> > --- > 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(). > + > static void daemon__free(struct daemon *daemon) > { > struct session *session, *h; > @@ -495,9 +502,7 @@ static void daemon__free(struct daemon *daemon) > list_for_each_entry_safe(session, h, &daemon->sessions, list) > session__remove(session); > > - free(daemon->config_real); > - free(daemon->config_base); > - free(daemon->base); > + __daemon__free(daemon); > } > > static void daemon__exit(struct daemon *daemon) > @@ -643,10 +648,54 @@ static int setup_config(struct daemon *daemon) > return daemon->config_real ? 0 : -1; > } > > +static int go_background(struct daemon *daemon) > +{ > + int pid, fd; > + > + pid = fork(); > + if (pid < 0) > + return -1; > + > + if (pid > 0) > + return 1; > + > + if (setsid() < 0) > + return -1; > + > + umask(0); > + > + if (chdir(daemon->base)) { > + perror("failed: chdir"); > + return -1; > + } > + > + fd = open("output", O_RDWR|O_CREAT|O_TRUNC, 0644); > + if (fd < 0) { > + perror("failed: open"); > + return -1; > + } > + > + fcntl(fd, F_SETFD, FD_CLOEXEC); > + > + close(0); > + dup2(fd, 1); > + dup2(fd, 2); > + close(fd); > + > + daemon->out = fdopen(1, "w"); > + if (!daemon->out) > + return -1; > + > + setbuf(daemon->out, NULL); > + return 0; > +} > + > 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 > 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