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] [section.name[=value] ...]", 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 set_config(struct perf_config_set *set, const char *file_name, 37 const char *var, const char *value) 38 { 39 struct perf_config_section *section = NULL; 40 struct perf_config_item *item = NULL; 41 const char *first_line = "# this file is auto-generated."; 42 FILE *fp; 43 44 if (set == NULL) 45 return -1; 46 47 fp = fopen(file_name, "w"); 48 if (!fp) 49 return -1; 50 51 perf_config_set__collect(set, file_name, var, value); 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 && section->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 73 static 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 (prefixcmp(var, section->name) != 0) 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 } 102 103 static 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 } 121 122 static 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 real 128 * 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 } 156 157 int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) 158 { 159 int i, ret = 0; 160 struct perf_config_set *set; 161 char *user_config = mkpath("%s/.perfconfig", getenv("HOME")); 162 163 argc = parse_options(argc, argv, config_options, config_usage, 164 PARSE_OPT_STOP_AT_NON_OPTION); 165 166 if (use_system_config && use_user_config) { 167 pr_err("Error: only one config file at a time\n"); 168 parse_options_usage(config_usage, config_options, "user", 0); 169 parse_options_usage(NULL, config_options, "system", 0); 170 return -1; 171 } 172 173 if (use_system_config) 174 config_exclusive_filename = perf_etc_perfconfig(); 175 else if (use_user_config) 176 config_exclusive_filename = user_config; 177 178 /* 179 * At only 'config' sub-command, individually use the config set 180 * because of reinitializing with options config file location. 181 */ 182 set = perf_config_set__new(); 183 if (!set) { 184 ret = -1; 185 goto out_err; 186 } 187 188 switch (actions) { 189 case ACTION_LIST: 190 if (argc) { 191 pr_err("Error: takes no arguments\n"); 192 parse_options_usage(config_usage, config_options, "l", 1); 193 } else { 194 ret = show_config(set); 195 if (ret < 0) { 196 const char * config_filename = config_exclusive_filename; 197 if (!config_exclusive_filename) 198 config_filename = user_config; 199 pr_err("Nothing configured, " 200 "please check your %s \n", config_filename); 201 } 202 } 203 break; 204 default: 205 if (argc) { 206 for (i = 0; argv[i]; i++) { 207 char *var, *value; 208 char *arg = strdup(argv[i]); 209 210 if (!arg) { 211 pr_err("%s: strdup failed\n", __func__); 212 ret = -1; 213 break; 214 } 215 216 if (parse_config_arg(arg, &var, &value) < 0) { 217 free(arg); 218 ret = -1; 219 break; 220 } 221 222 if (value == NULL) 223 ret = show_spec_config(set, var); 224 else { 225 const char *config_filename = config_exclusive_filename; 226 227 if (!config_exclusive_filename) 228 config_filename = user_config; 229 ret = set_config(set, config_filename, var, value); 230 } 231 free(arg); 232 } 233 } else 234 usage_with_options(config_usage, config_options); 235 } 236 237 perf_config_set__delete(set); 238 out_err: 239 return ret; 240 } 241