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
  17 static bool use_system_config, use_user_config;
  18
  19 static const char * const config_usage[] = {
  20         "perf config [<file-option>] [options]",
  21         NULL
  22 };
  23
  24 enum actions {
  25         ACTION_LIST = 1
  26 } actions;
  27
  28 static 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
  36 static int show_config(struct perf_config_set *set)
  37 {
  38         struct perf_config_section *section;
  39         struct perf_config_item *item;
  40         struct list_head *sections;
  41
  42         if (set == NULL)
  43                 return -1;
  44
  45         sections = &set->sections;
  46         if (list_empty(sections))
  47                 return -1;
  48
  49         list_for_each_entry(section, sections, node) {
  50                 list_for_each_entry(item, &section->items, node) {
  51                         char *value = item->value;
  52
  53                         if (value)
  54                                 printf("%s.%s=%s\n", section->name,
  55                                        item->name, value);
  56                 }
  57         }
  58
  59         return 0;
  60 }
  61
  62 int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
  63 {
  64         int ret = 0;
  65         struct perf_config_set *set;
  66         char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
  67
  68         argc = parse_options(argc, argv, config_options, config_usage,
  69                              PARSE_OPT_STOP_AT_NON_OPTION);
  70
  71         if (use_system_config && use_user_config) {
  72                 pr_err("Error: only one config file at a time\n");
  73                 parse_options_usage(config_usage, config_options, "user", 0);
  74                 parse_options_usage(NULL, config_options, "system", 0);
  75                 return -1;
  76         }
  77
  78         if (use_system_config)
  79                 config_exclusive_filename = perf_etc_perfconfig();
  80         else if (use_user_config)
  81                 config_exclusive_filename = user_config;
  82
  83         set = perf_config_set__new();
  84         if (!set) {
  85                 ret = -1;
  86                 goto out_err;
  87         }
  88
  89         switch (actions) {
  90         case ACTION_LIST:
  91                 if (argc) {
  92                         pr_err("Error: takes no arguments\n");
  93                         parse_options_usage(config_usage, config_options, "l", 1);
  94                 } else {
  95                         ret = show_config(set);
  96                         if (ret < 0) {
  97                                 const char * config_filename = config_exclusive_filename;
  98                                 if (!config_exclusive_filename)
  99                                         config_filename = user_config;
 100                                 pr_err("Nothing configured, "
 101                                        "please check your %s \n", config_filename);
 102                         }
 103                 }
 104                 break;
 105         default:
 106                 usage_with_options(config_usage, config_options);
 107         }
 108
 109         perf_config_set__delete(set);
 110 out_err:
 111         return ret;
 112 }