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Diffstat (limited to 'tools/perf/builtin-config.c')
-rw-r--r--tools/perf/builtin-config.c137
1 files changed, 134 insertions, 3 deletions
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index e4207a23b52c..8c0d93b7c2f0 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -17,7 +17,7 @@
static bool use_system_config, use_user_config;
static const char * const config_usage[] = {
- "perf config [<file-option>] [options]",
+ "perf config [<file-option>] [options] [section.name[=value] ...]",
NULL
};
@@ -33,6 +33,73 @@ static struct option config_options[] = {
OPT_END()
};
+static int set_config(struct perf_config_set *set, const char *file_name,
+ const char *var, const char *value)
+{
+ struct perf_config_section *section = NULL;
+ struct perf_config_item *item = NULL;
+ const char *first_line = "# this file is auto-generated.";
+ FILE *fp;
+
+ if (set == NULL)
+ return -1;
+
+ fp = fopen(file_name, "w");
+ if (!fp)
+ return -1;
+
+ perf_config_set__collect(set, file_name, var, value);
+ fprintf(fp, "%s\n", first_line);
+
+ /* overwrite configvariables */
+ perf_config_items__for_each_entry(&set->sections, section) {
+ if (!use_system_config && section->from_system_config)
+ continue;
+ fprintf(fp, "[%s]\n", section->name);
+
+ perf_config_items__for_each_entry(&section->items, item) {
+ if (!use_system_config && section->from_system_config)
+ continue;
+ if (item->value)
+ fprintf(fp, "\t%s = %s\n",
+ item->name, item->value);
+ }
+ }
+ fclose(fp);
+
+ return 0;
+}
+
+static int show_spec_config(struct perf_config_set *set, const char *var)
+{
+ struct perf_config_section *section;
+ struct perf_config_item *item;
+
+ if (set == NULL)
+ return -1;
+
+ perf_config_items__for_each_entry(&set->sections, section) {
+ if (prefixcmp(var, section->name) != 0)
+ continue;
+
+ perf_config_items__for_each_entry(&section->items, item) {
+ const char *name = var + strlen(section->name) + 1;
+
+ if (strcmp(name, item->name) == 0) {
+ char *value = item->value;
+
+ if (value) {
+ printf("%s=%s\n", var, value);
+ return 0;
+ }
+ }
+
+ }
+ }
+
+ return 0;
+}
+
static int show_config(struct perf_config_set *set)
{
struct perf_config_section *section;
@@ -52,9 +119,44 @@ static int show_config(struct perf_config_set *set)
return 0;
}
+static int parse_config_arg(char *arg, char **var, char **value)
+{
+ const char *last_dot = strchr(arg, '.');
+
+ /*
+ * Since "var" 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 == arg) {
+ pr_err("The config variable does not contain a section name: %s\n", arg);
+ return -1;
+ }
+ if (!last_dot[1]) {
+ pr_err("The config variable does not contain a variable name: %s\n", arg);
+ return -1;
+ }
+
+ *value = strchr(arg, '=');
+ if (*value == NULL)
+ *var = arg;
+ else if (!strcmp(*value, "=")) {
+ pr_err("The config variable does not contain a value: %s\n", arg);
+ return -1;
+ } else {
+ *value = *value + 1; /* excluding a first character '=' */
+ *var = strsep(&arg, "=");
+ if (*var[0] == '\0') {
+ pr_err("invalid config variable: %s\n", arg);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
{
- int ret = 0;
+ int i, ret = 0;
struct perf_config_set *set;
char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
@@ -100,7 +202,36 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
}
break;
default:
- usage_with_options(config_usage, config_options);
+ if (argc) {
+ for (i = 0; argv[i]; i++) {
+ char *var, *value;
+ char *arg = strdup(argv[i]);
+
+ if (!arg) {
+ pr_err("%s: strdup failed\n", __func__);
+ ret = -1;
+ break;
+ }
+
+ if (parse_config_arg(arg, &var, &value) < 0) {
+ free(arg);
+ ret = -1;
+ break;
+ }
+
+ if (value == NULL)
+ ret = show_spec_config(set, var);
+ else {
+ const char *config_filename = config_exclusive_filename;
+
+ if (!config_exclusive_filename)
+ config_filename = user_config;
+ ret = set_config(set, config_filename, var, value);
+ }
+ free(arg);
+ }
+ } else
+ usage_with_options(config_usage, config_options);
}
perf_config_set__delete(set);