perf tui: Allow disabling the TUI on a per command basis in ~/.perfconfig

Using the same scheme as for git's/perf's pager setup, i.e. if one
doesn't want to, on a newt enabled perf binary, to disable the TUI for
'perf report', its just a matter of doing:

  [root@doppio linux-2.6-tip]# printf "[tui]\n\nreport = off\n" >
  /root/.perfconfig
  [root@doppio linux-2.6-tip]# cat /root/.perfconfig
  [tui]

  report = off
  [root@doppio linux-2.6-tip]#

System wide settings are also possible, by editing /etc/perfconfig, etc,
i.e. the git machinery for config files applies to perf as well, so when
in doubt where to put your settings, consult the git documentation, if
it fails, please let us know.

Suggested-by: Ingo Molnar <mingo@elte.hu>
Discussed-with: Stephane Eranian <eranian@google.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 08e0e5d2b50e..6e4871191138 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -15,15 +15,15 @@
 #include "util/parse-events.h"
 #include "util/debugfs.h"
 
-bool use_browser;
-
 const char perf_usage_string[] =
         "perf [--version] [--help] COMMAND [ARGS]";
 
 const char perf_more_info_string[] =
         "See 'perf help COMMAND' for more information on a specific command.";
 
+int use_browser = -1;
 static int use_pager = -1;
+
 struct pager_config {
         const char *cmd;
         int val;
@@ -49,6 +49,24 @@ int check_pager_config(const char *cmd)
         return c.val;
 }
 
+static int tui_command_config(const char *var, const char *value, void *data)
+{
+        struct pager_config *c = data;
+        if (!prefixcmp(var, "tui.") && !strcmp(var + 4, c->cmd))
+                c->val = perf_config_bool(var, value);
+        return 0;
+}
+
+/* returns 0 for "no tui", 1 for "use tui", and -1 for "not specified" */
+static int check_tui_config(const char *cmd)
+{
+        struct pager_config c;
+        c.cmd = cmd;
+        c.val = -1;
+        perf_config(tui_command_config, &c);
+        return c.val;
+}
+
 static void commit_pager_choice(void)
 {
         switch (use_pager) {
@@ -255,6 +273,9 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
         if (p->option & RUN_SETUP)
                 prefix = NULL; /* setup_perf_directory(); */
 
+        if (use_browser == -1)
+                use_browser = check_tui_config(p->cmd);
+
         if (use_pager == -1 && p->option & RUN_SETUP)
                 use_pager = check_pager_config(p->cmd);
         if (use_pager == -1 && p->option & USE_PAGER)