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
  16 static bool use_system_config, use_user_config;
  17
  18 static const char * const config_usage[] = {
  19         "perf config [<file-option>] [options]",
  20         NULL
  21 };
  22
  23 enum actions {
  24         ACTION_LIST = 1
  25 } actions;
  26
  27 static struct option config_options[] = {
  28         OPT_SET_UINT('l', "list", &actions,
  29                      "show current config variables", ACTION_LIST),
  30         OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
  31         OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"),
  32         OPT_END()
  33 };
  34
  35 static int show_config(const char *key, const char *value,
  36                        void *cb __maybe_unused)
  37 {
  38         if (value)
  39                 printf("%s=%s\n", key, value);
  40         else
  41                 printf("%s\n", key);
  42
  43         return 0;
  44 }
  45
  46 int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
  47 {
  48         int ret = 0;
  49         char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
  50
  51         argc = parse_options(argc, argv, config_options, config_usage,
  52                              PARSE_OPT_STOP_AT_NON_OPTION);
  53
  54         if (use_system_config && use_user_config) {
  55                 pr_err("Error: only one config file at a time\n");
  56                 parse_options_usage(config_usage, config_options, "user", 0);
  57                 parse_options_usage(NULL, config_options, "system", 0);
  58                 return -1;
  59         }
  60
  61         if (use_system_config)
  62                 config_exclusive_filename = perf_etc_perfconfig();
  63         else if (use_user_config)
  64                 config_exclusive_filename = user_config;
  65
  66         switch (actions) {
  67         case ACTION_LIST:
  68                 if (argc) {
  69                         pr_err("Error: takes no arguments\n");
  70                         parse_options_usage(config_usage, config_options, "l", 1);
  71                 } else {
  72                         ret = perf_config(show_config, NULL);
  73                         if (ret < 0) {
  74                                 const char * config_filename = config_exclusive_filename;
  75                                 if (!config_exclusive_filename)
  76                                         config_filename = user_config;
  77                                 pr_err("Nothing configured, "
  78                                        "please check your %s \n", config_filename);
  79                         }
  80                 }
  81                 break;
  82         default:
  83                 usage_with_options(config_usage, config_options);
  84         }
  85
  86         return ret;
  87 }