You can get several config items as below,
# perf config report.queue-size call-graph.record-mode
but it would be needed to more precisely check arguments,
before show_spec_config() takes over the arguments.
The function would be also used for config write functionality
in the near future.
Cc: Namhyung Kim <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Wang Nan <[email protected]>
Signed-off-by: Taeung Song <[email protected]>
---
tools/perf/builtin-config.c | 42 ++++++++++++++++++++++++++++++++++++++++--
1 file changed, 40 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index 7b24789..02def73 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -82,6 +82,38 @@ static int show_config(struct perf_config_set *set)
return 0;
}
+static int parse_config_arg(const char *arg, char **var)
+{
+ const char *last_dot;
+ char *key;
+
+ key = strdup(arg);
+ if (!key) {
+ pr_err("%s: strdup failed\n", __func__);
+ return -1;
+ }
+
+ last_dot = strchr(key, '.');
+ /*
+ * Since "key" actually contains the section name and the real
+ * config variable name separated by a dot, we have to know where the
dot is.
+ */
+ if (last_dot == NULL || last_dot == key) {
+ pr_err("The config variable does not contain a section: %s\n",
arg);
+ goto out_err;
+ }
+ if (!last_dot[1]) {
+ pr_err("The config varible does not contain variable name:
%s\n", arg);
+ goto out_err;
+ }
+
+ *var = key;
+ return 0;
+out_err:
+ free(key);
+ return -1;
+}
+
int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i, ret = 0;
@@ -135,8 +167,14 @@ int cmd_config(int argc, const char **argv, const char
*prefix __maybe_unused)
break;
}
- for (i = 0; argv[i]; i++)
- ret = show_spec_config(set, argv[i]);
+ for (i = 0; argv[i]; i++) {
+ char *var = NULL;
+
+ if (parse_config_arg(argv[i], &var) < 0)
+ break;
+ ret = show_spec_config(set, var);
+ free(var);
+ }
}
perf_config_set__delete(set);
--
2.7.4
