261 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * builtin-config.c4 *5 * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com>6 *7 */8#include "builtin.h"9 10#include "util/cache.h"11#include <subcmd/parse-options.h>12#include "util/debug.h"13#include "util/config.h"14#include <linux/string.h>15#include <limits.h>16#include <stdio.h>17#include <stdlib.h>18 19static bool use_system_config, use_user_config;20 21static const char * const config_usage[] = {22 "perf config [<file-option>] [options] [section.name[=value] ...]",23 NULL24};25 26enum actions {27 ACTION_LIST = 128} actions;29 30static 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"),35 OPT_END()36};37 38static int set_config(struct perf_config_set *set, const char *file_name)39{40 struct perf_config_section *section = NULL;41 struct perf_config_item *item = NULL;42 const char *first_line = "# this file is auto-generated.";43 FILE *fp;44 45 if (set == NULL)46 return -1;47 48 fp = fopen(file_name, "w");49 if (!fp)50 return -1;51 52 fprintf(fp, "%s\n", first_line);53 54 /* overwrite configvariables */55 perf_config_items__for_each_entry(&set->sections, section) {56 if (!use_system_config && section->from_system_config)57 continue;58 fprintf(fp, "[%s]\n", section->name);59 60 perf_config_items__for_each_entry(§ion->items, item) {61 if (!use_system_config && item->from_system_config)62 continue;63 if (item->value)64 fprintf(fp, "\t%s = %s\n",65 item->name, item->value);66 }67 }68 fclose(fp);69 70 return 0;71}72 73static int show_spec_config(struct perf_config_set *set, const char *var)74{75 struct perf_config_section *section;76 struct perf_config_item *item;77 78 if (set == NULL)79 return -1;80 81 perf_config_items__for_each_entry(&set->sections, section) {82 if (!strstarts(var, section->name))83 continue;84 85 perf_config_items__for_each_entry(§ion->items, item) {86 const char *name = var + strlen(section->name) + 1;87 88 if (strcmp(name, item->name) == 0) {89 char *value = item->value;90 91 if (value) {92 printf("%s=%s\n", var, value);93 return 0;94 }95 }96 97 }98 }99 100 return 0;101}102 103static int show_config(struct perf_config_set *set)104{105 struct perf_config_section *section;106 struct perf_config_item *item;107 108 if (set == NULL)109 return -1;110 111 perf_config_set__for_each_entry(set, section, item) {112 char *value = item->value;113 114 if (value)115 printf("%s.%s=%s\n", section->name,116 item->name, value);117 }118 119 return 0;120}121 122static int parse_config_arg(char *arg, char **var, char **value)123{124 const char *last_dot = strchr(arg, '.');125 126 /*127 * Since "var" actually contains the section name and the real128 * config variable name separated by a dot, we have to know where the dot is.129 */130 if (last_dot == NULL || last_dot == arg) {131 pr_err("The config variable does not contain a section name: %s\n", arg);132 return -1;133 }134 if (!last_dot[1]) {135 pr_err("The config variable does not contain a variable name: %s\n", arg);136 return -1;137 }138 139 *value = strchr(arg, '=');140 if (*value == NULL)141 *var = arg;142 else if (!strcmp(*value, "=")) {143 pr_err("The config variable does not contain a value: %s\n", arg);144 return -1;145 } else {146 *value = *value + 1; /* excluding a first character '=' */147 *var = strsep(&arg, "=");148 if (*var[0] == '\0') {149 pr_err("invalid config variable: %s\n", arg);150 return -1;151 }152 }153 154 return 0;155}156 157int cmd_config(int argc, const char **argv)158{159 int i, ret = -1;160 struct perf_config_set *set;161 char path[PATH_MAX];162 char *user_config = mkpath(path, sizeof(path), "%s/.perfconfig", getenv("HOME"));163 const char *config_filename;164 bool changed = false;165 166 argc = parse_options(argc, argv, config_options, config_usage,167 PARSE_OPT_STOP_AT_NON_OPTION);168 169 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);173 return -1;174 }175 176 if (use_system_config)177 config_exclusive_filename = perf_etc_perfconfig();178 else if (use_user_config)179 config_exclusive_filename = user_config;180 181 if (!config_exclusive_filename)182 config_filename = user_config;183 else184 config_filename = config_exclusive_filename;185 186 /*187 * At only 'config' sub-command, individually use the config set188 * because of reinitializing with options config file location.189 */190 set = perf_config_set__new();191 if (!set)192 goto out_err;193 194 switch (actions) {195 case ACTION_LIST:196 if (argc) {197 pr_err("Error: takes no arguments\n");198 parse_options_usage(config_usage, config_options, "l", 1);199 } else {200do_action_list:201 if (show_config(set) < 0) {202 pr_err("Nothing configured, "203 "please check your %s \n", config_filename);204 goto out_err;205 }206 }207 break;208 default:209 if (!argc)210 goto do_action_list;211 212 for (i = 0; argv[i]; i++) {213 char *var, *value;214 char *arg = strdup(argv[i]);215 216 if (!arg) {217 pr_err("%s: strdup failed\n", __func__);218 goto out_err;219 }220 221 if (parse_config_arg(arg, &var, &value) < 0) {222 free(arg);223 goto out_err;224 }225 226 if (value == NULL) {227 if (show_spec_config(set, var) < 0) {228 pr_err("%s is not configured: %s\n",229 var, config_filename);230 free(arg);231 goto out_err;232 }233 } else {234 if (perf_config_set__collect(set, config_filename,235 var, value) < 0) {236 pr_err("Failed to add '%s=%s'\n",237 var, value);238 free(arg);239 goto out_err;240 }241 changed = true;242 }243 free(arg);244 }245 246 if (!changed)247 break;248 249 if (set_config(set, config_filename) < 0) {250 pr_err("Failed to set the configs on %s\n",251 config_filename);252 goto out_err;253 }254 }255 256 ret = 0;257out_err:258 perf_config_set__delete(set);259 return ret;260}261