[PATCH v5 2/4] perf config: Let show_config() work with perf_config_set

From: Taeung Song
Date: Sat Apr 02 2016 - 13:08:39 EST


Current show_config() has a problem when user or
system config files have same config variables i.e.

# cat ~/.perfconfig
[top]
children = false

when $(sysconfdir) is /usr/local/etc
# cat /usr/local/etc/perfconfig
[top]
children = true

Before:
# perf config --user --list
top.children=false

# perf config --system --list
top.children=true

# perf config --list
top.children=true
top.children=false

Because perf_config() can call show_config()
each the config file (user and system).
So fix it.

After:
# perf config --user --list
top.children=false

# perf config --system --list
top.children=true

# perf config --list
top.children=false

Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
---
tools/perf/builtin-config.c | 35 ++++++++++++++++++++++++++++-------
1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index c42448e..1133224 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -12,6 +12,7 @@
#include <subcmd/parse-options.h>
#include "util/util.h"
#include "util/debug.h"
+#include "util/config.h"

static bool use_system_config, use_user_config;

@@ -32,13 +33,24 @@ static struct option config_options[] = {
OPT_END()
};

-static int show_config(const char *key, const char *value,
- void *cb __maybe_unused)
+static int show_config(struct perf_config_set *set)
{
- if (value)
- printf("%s=%s\n", key, value);
- else
- printf("%s\n", key);
+ struct perf_config_section *section;
+ struct perf_config_item *item;
+ struct list_head *sections = &set->sections;
+
+ if (list_empty(sections))
+ return -1;
+
+ list_for_each_entry(section, sections, node) {
+ list_for_each_entry(item, &section->items, node) {
+ char *value = item->value;
+
+ if (value)
+ printf("%s.%s=%s\n", section->name,
+ item->name, value);
+ }
+ }

return 0;
}
@@ -46,6 +58,7 @@ static int show_config(const char *key, const char *value,
int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
{
int ret = 0;
+ struct perf_config_set *set;
char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));

argc = parse_options(argc, argv, config_options, config_usage,
@@ -63,13 +76,19 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
else if (use_user_config)
config_exclusive_filename = user_config;

+ set = perf_config_set__new();
+ if (!set) {
+ ret = -1;
+ goto out_err;
+ }
+
switch (actions) {
case ACTION_LIST:
if (argc) {
pr_err("Error: takes no arguments\n");
parse_options_usage(config_usage, config_options, "l", 1);
} else {
- ret = perf_config(show_config, NULL);
+ ret = show_config(set);
if (ret < 0) {
const char * config_filename = config_exclusive_filename;
if (!config_exclusive_filename)
@@ -83,5 +102,7 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
usage_with_options(config_usage, config_options);
}

+ perf_config_set__delete(set);
+out_err:
return ret;
}
--
2.5.0