1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com>
12 #include "util/cache.h"
13 #include <subcmd/parse-options.h>
14 #include "util/util.h"
15 #include "util/debug.h"
16 #include "util/config.h"
17 #include <linux/string.h>
19 static bool use_system_config
, use_user_config
;
21 static const char * const config_usage
[] = {
22 "perf config [<file-option>] [options] [section.name[=value] ...]",
30 static struct option config_options
[] = {
31 OPT_SET_UINT('l', "list", &actions
,
32 "show current config variables", ACTION_LIST
),
33 OPT_BOOLEAN(0, "system", &use_system_config
, "use system config file"),
34 OPT_BOOLEAN(0, "user", &use_user_config
, "use user config file"),
38 static int set_config(struct perf_config_set
*set
, const char *file_name
,
39 const char *var
, const char *value
)
41 struct perf_config_section
*section
= NULL
;
42 struct perf_config_item
*item
= NULL
;
43 const char *first_line
= "# this file is auto-generated.";
49 fp
= fopen(file_name
, "w");
53 perf_config_set__collect(set
, file_name
, var
, value
);
54 fprintf(fp
, "%s\n", first_line
);
56 /* overwrite configvariables */
57 perf_config_items__for_each_entry(&set
->sections
, section
) {
58 if (!use_system_config
&& section
->from_system_config
)
60 fprintf(fp
, "[%s]\n", section
->name
);
62 perf_config_items__for_each_entry(§ion
->items
, item
) {
63 if (!use_system_config
&& item
->from_system_config
)
66 fprintf(fp
, "\t%s = %s\n",
67 item
->name
, item
->value
);
75 static int show_spec_config(struct perf_config_set
*set
, const char *var
)
77 struct perf_config_section
*section
;
78 struct perf_config_item
*item
;
83 perf_config_items__for_each_entry(&set
->sections
, section
) {
84 if (!strstarts(var
, section
->name
))
87 perf_config_items__for_each_entry(§ion
->items
, item
) {
88 const char *name
= var
+ strlen(section
->name
) + 1;
90 if (strcmp(name
, item
->name
) == 0) {
91 char *value
= item
->value
;
94 printf("%s=%s\n", var
, value
);
105 static int show_config(struct perf_config_set
*set
)
107 struct perf_config_section
*section
;
108 struct perf_config_item
*item
;
113 perf_config_set__for_each_entry(set
, section
, item
) {
114 char *value
= item
->value
;
117 printf("%s.%s=%s\n", section
->name
,
124 static int parse_config_arg(char *arg
, char **var
, char **value
)
126 const char *last_dot
= strchr(arg
, '.');
129 * Since "var" actually contains the section name and the real
130 * config variable name separated by a dot, we have to know where the dot is.
132 if (last_dot
== NULL
|| last_dot
== arg
) {
133 pr_err("The config variable does not contain a section name: %s\n", arg
);
137 pr_err("The config variable does not contain a variable name: %s\n", arg
);
141 *value
= strchr(arg
, '=');
144 else if (!strcmp(*value
, "=")) {
145 pr_err("The config variable does not contain a value: %s\n", arg
);
148 *value
= *value
+ 1; /* excluding a first character '=' */
149 *var
= strsep(&arg
, "=");
150 if (*var
[0] == '\0') {
151 pr_err("invalid config variable: %s\n", arg
);
159 int cmd_config(int argc
, const char **argv
)
162 struct perf_config_set
*set
;
163 char *user_config
= mkpath("%s/.perfconfig", getenv("HOME"));
164 const char *config_filename
;
166 argc
= parse_options(argc
, argv
, config_options
, config_usage
,
167 PARSE_OPT_STOP_AT_NON_OPTION
);
169 if (use_system_config
&& use_user_config
) {
170 pr_err("Error: only one config file at a time\n");
171 parse_options_usage(config_usage
, config_options
, "user", 0);
172 parse_options_usage(NULL
, config_options
, "system", 0);
176 if (use_system_config
)
177 config_exclusive_filename
= perf_etc_perfconfig();
178 else if (use_user_config
)
179 config_exclusive_filename
= user_config
;
181 if (!config_exclusive_filename
)
182 config_filename
= user_config
;
184 config_filename
= config_exclusive_filename
;
187 * At only 'config' sub-command, individually use the config set
188 * because of reinitializing with options config file location.
190 set
= perf_config_set__new();
197 pr_err("Error: takes no arguments\n");
198 parse_options_usage(config_usage
, config_options
, "l", 1);
200 if (show_config(set
) < 0) {
201 pr_err("Nothing configured, "
202 "please check your %s \n", config_filename
);
209 usage_with_options(config_usage
, config_options
);
213 for (i
= 0; argv
[i
]; i
++) {
215 char *arg
= strdup(argv
[i
]);
218 pr_err("%s: strdup failed\n", __func__
);
222 if (parse_config_arg(arg
, &var
, &value
) < 0) {
228 if (show_spec_config(set
, var
) < 0) {
229 pr_err("%s is not configured: %s\n",
230 var
, config_filename
);
235 if (set_config(set
, config_filename
, var
, value
) < 0) {
236 pr_err("Failed to set '%s=%s' on %s\n",
237 var
, value
, config_filename
);
248 perf_config_set__delete(set
);