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 #include <linux/string.h> 17 18 static bool use_system_config, use_user_config; 19 20 static const char * const config_usage[] = { 21 "perf config [<file-option>] [options] [section.name[=value] ...]", 22 NULL 23 }; 24 25 enum actions { 26 ACTION_LIST = 1 27 } actions; 28 29 static struct option config_options[] = { 30 OPT_SET_UINT('l', "list", &actions, 31 "show current config variables", ACTION_LIST), 32 OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"), 33 OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"), 34 OPT_END() 35 }; 36 37 static int set_config(struct perf_config_set *set, const char *file_name, 38 const char *var, const char *value) 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 perf_config_set__collect(set, file_name, var, value); 53 fprintf(fp, "%s\n", first_line); 54 55 /* overwrite configvariables */ 56 perf_config_items__for_each_entry(&set->sections, section) { 57 if (!use_system_config && section->from_system_config) 58 continue; 59 fprintf(fp, "[%s]\n", section->name); 60 61 perf_config_items__for_each_entry(§ion->items, item) { 62 if (!use_system_config && item->from_system_config) 63 continue; 64 if (item->value) 65 fprintf(fp, "\t%s = %s\n", 66 item->name, item->value); 67 } 68 } 69 fclose(fp); 70 71 return 0; 72 } 73 74 static int show_spec_config(struct perf_config_set *set, const char *var) 75 { 76 struct perf_config_section *section; 77 struct perf_config_item *item; 78 79 if (set == NULL) 80 return -1; 81 82 perf_config_items__for_each_entry(&set->sections, section) { 83 if (!strstarts(var, section->name)) 84 continue; 85 86 perf_config_items__for_each_entry(§ion->items, item) { 87 const char *name = var + strlen(section->name) + 1; 88 89 if (strcmp(name, item->name) == 0) { 90 char *value = item->value; 91 92 if (value) { 93 printf("%s=%s\n", var, value); 94 return 0; 95 } 96 } 97 98 } 99 } 100 101 return 0; 102 } 103 104 static int show_config(struct perf_config_set *set) 105 { 106 struct perf_config_section *section; 107 struct perf_config_item *item; 108 109 if (set == NULL) 110 return -1; 111 112 perf_config_set__for_each_entry(set, section, item) { 113 char *value = item->value; 114 115 if (value) 116 printf("%s.%s=%s\n", section->name, 117 item->name, value); 118 } 119 120 return 0; 121 } 122 123 static int parse_config_arg(char *arg, char **var, char **value) 124 { 125 const char *last_dot = strchr(arg, '.'); 126 127 /* 128 * Since "var" actually contains the section name and the real 129 * config variable name separated by a dot, we have to know where the dot is. 130 */ 131 if (last_dot == NULL || last_dot == arg) { 132 pr_err("The config variable does not contain a section name: %s\n", arg); 133 return -1; 134 } 135 if (!last_dot[1]) { 136 pr_err("The config variable does not contain a variable name: %s\n", arg); 137 return -1; 138 } 139 140 *value = strchr(arg, '='); 141 if (*value == NULL) 142 *var = arg; 143 else if (!strcmp(*value, "=")) { 144 pr_err("The config variable does not contain a value: %s\n", arg); 145 return -1; 146 } else { 147 *value = *value + 1; /* excluding a first character '=' */ 148 *var = strsep(&arg, "="); 149 if (*var[0] == '\0') { 150 pr_err("invalid config variable: %s\n", arg); 151 return -1; 152 } 153 } 154 155 return 0; 156 } 157 158 int cmd_config(int argc, const char **argv) 159 { 160 int i, ret = -1; 161 struct perf_config_set *set; 162 char *user_config = mkpath("%s/.perfconfig", getenv("HOME")); 163 const char *config_filename; 164 165 argc = parse_options(argc, argv, config_options, config_usage, 166 PARSE_OPT_STOP_AT_NON_OPTION); 167 168 if (use_system_config && use_user_config) { 169 pr_err("Error: only one config file at a time\n"); 170 parse_options_usage(config_usage, config_options, "user", 0); 171 parse_options_usage(NULL, config_options, "system", 0); 172 return -1; 173 } 174 175 if (use_system_config) 176 config_exclusive_filename = perf_etc_perfconfig(); 177 else if (use_user_config) 178 config_exclusive_filename = user_config; 179 180 if (!config_exclusive_filename) 181 config_filename = user_config; 182 else 183 config_filename = config_exclusive_filename; 184 185 /* 186 * At only 'config' sub-command, individually use the config set 187 * because of reinitializing with options config file location. 188 */ 189 set = perf_config_set__new(); 190 if (!set) 191 goto out_err; 192 193 switch (actions) { 194 case ACTION_LIST: 195 if (argc) { 196 pr_err("Error: takes no arguments\n"); 197 parse_options_usage(config_usage, config_options, "l", 1); 198 } else { 199 if (show_config(set) < 0) { 200 pr_err("Nothing configured, " 201 "please check your %s \n", config_filename); 202 goto out_err; 203 } 204 } 205 break; 206 default: 207 if (!argc) { 208 usage_with_options(config_usage, config_options); 209 break; 210 } 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 (set_config(set, config_filename, var, value) < 0) { 235 pr_err("Failed to set '%s=%s' on %s\n", 236 var, value, config_filename); 237 free(arg); 238 goto out_err; 239 } 240 } 241 free(arg); 242 } 243 } 244 245 ret = 0; 246 out_err: 247 perf_config_set__delete(set); 248 return ret; 249 } 250