LXR linux/tools/perf/builtin-config.c

   1/*
   2 * builtin-config.c
   3 *
   4 * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com>
   5 *
   6 */
   7#include "builtin.h"
   8
   9#include "perf.h"
  10
  11#include "util/cache.h"
  12#include <subcmd/parse-options.h>
  13#include "util/util.h"
  14#include "util/debug.h"
  15#include "util/config.h"
  16
  17static bool use_system_config, use_user_config;
  18
  19static const char * const config_usage[] = {
  20        "perf config [<file-option>] [options]",
  21        NULL
  22};
  23
  24enum actions {
  25        ACTION_LIST = 1
  26} actions;
  27
  28static struct option config_options[] = {
  29        OPT_SET_UINT('l', "list", &actions,
  30                     "show current config variables", ACTION_LIST),
  31        OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
  32        OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"),
  33        OPT_END()
  34};
  35
  36static int show_config(struct perf_config_set *set)
  37{
  38        struct perf_config_section *section;
  39        struct perf_config_item *item;
  40
  41        if (set == NULL)
  42                return -1;
  43
  44        perf_config_set__for_each_entry(set, section, item) {
  45                char *value = item->value;
  46
  47                if (value)
  48                        printf("%s.%s=%s\n", section->name,
  49                               item->name, value);
  50        }
  51
  52        return 0;
  53}
  54
  55int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
  56{
  57        int ret = 0;
  58        struct perf_config_set *set;
  59        char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
  60
  61        argc = parse_options(argc, argv, config_options, config_usage,
  62                             PARSE_OPT_STOP_AT_NON_OPTION);
  63
  64        if (use_system_config && use_user_config) {
  65                pr_err("Error: only one config file at a time\n");
  66                parse_options_usage(config_usage, config_options, "user", 0);
  67                parse_options_usage(NULL, config_options, "system", 0);
  68                return -1;
  69        }
  70
  71        if (use_system_config)
  72                config_exclusive_filename = perf_etc_perfconfig();
  73        else if (use_user_config)
  74                config_exclusive_filename = user_config;
  75
  76        /*
  77         * At only 'config' sub-command, individually use the config set
  78         * because of reinitializing with options config file location.
  79         */
  80        set = perf_config_set__new();
  81        if (!set) {
  82                ret = -1;
  83                goto out_err;
  84        }
  85
  86        switch (actions) {
  87        case ACTION_LIST:
  88                if (argc) {
  89                        pr_err("Error: takes no arguments\n");
  90                        parse_options_usage(config_usage, config_options, "l", 1);
  91                } else {
  92                        ret = show_config(set);
  93                        if (ret < 0) {
  94                                const char * config_filename = config_exclusive_filename;
  95                                if (!config_exclusive_filename)
  96                                        config_filename = user_config;
  97                                pr_err("Nothing configured, "
  98                                       "please check your %s \n", config_filename);
  99                        }
 100                }
 101                break;
 102        default:
 103                usage_with_options(config_usage, config_options);
 104        }
 105
 106        perf_config_set__delete(set);
 107out_err:
 108        return ret;
 109}
 110