// SPDX-License-Identifier: GPL-2.0 /* * builtin-config.c * * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com> * */ #include "builtin.h" #include "util/cache.h" #include <subcmd/parse-options.h> #include "util/debug.h" #include "util/config.h" #include <linux/string.h> #include <stdio.h> #include <stdlib.h> static bool use_system_config, use_user_config; static const char * const config_usage[] = { "perf config [<file-option>] [options] [section.name[=value] ...]", NULL }; enum actions { ACTION_LIST = 1 } actions; static struct option config_options[] = { OPT_SET_UINT('l', "list", &actions, "show current config variables", ACTION_LIST), OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"), OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"), OPT_END() }; static int set_config(struct perf_config_set *set, const char *file_name) { struct perf_config_section *section = NULL; struct perf_config_item *item = NULL; const char *first_line = "# this file is auto-generated."; FILE *fp; if (set == NULL) return -1; fp = fopen(file_name, "w"); if (!fp) return -1; fprintf(fp, "%s\n", first_line); /* overwrite configvariables */ perf_config_items__for_each_entry(&set->sections, section) { if (!use_system_config && section->from_system_config) continue; fprintf(fp, "[%s]\n", section->name); perf_config_items__for_each_entry(§ion->items, item) { if (!use_system_config && item->from_system_config) continue; if (item->value) fprintf(fp, "\t%s = %s\n", item->name, item->value); } } fclose(fp); return 0; } static int show_spec_config(struct perf_config_set *set, const char *var) { struct perf_config_section *section; struct perf_config_item *item; if (set == NULL) return -1; perf_config_items__for_each_entry(&set->sections, section) { if (!strstarts(var, section->name)) continue; perf_config_items__for_each_entry(§ion->items, item) { const char *name = var + strlen(section->name) + 1; if (strcmp(name, item->name) == 0) { char *value = item->value; if (value) { printf("%s=%s\n", var, value); return 0; } } } } return 0; } static int show_config(struct perf_config_set *set) { struct perf_config_section *section; struct perf_config_item *item; if (set == NULL) return -1; perf_config_set__for_each_entry(set, section, item) { char *value = item->value; if (value) printf("%s.%s=%s\n", section->name, item->name, value); } return 0; } static int parse_config_arg(char *arg, char **var, char **value) { const char *last_dot = strchr(arg, '.'); /* * Since "var" actually contains the section name and the real * config variable name separated by a dot, we have to know where the dot is. */ if (last_dot == NULL || last_dot == arg) { pr_err("The config variable does not contain a section name: %s\n", arg); return -1; } if (!last_dot[1]) { pr_err("The config variable does not contain a variable name: %s\n", arg); return -1; } *value = strchr(arg, '='); if (*value == NULL) *var = arg; else if (!strcmp(*value, "=")) { pr_err("The config variable does not contain a value: %s\n", arg); return -1; } else { *value = *value + 1; /* excluding a first character '=' */ *var = strsep(&arg, "="); if (*var[0] == '\0') { pr_err("invalid config variable: %s\n", arg); return -1; } } return 0; } int cmd_config(int argc, const char **argv) { int i, ret = -1; struct perf_config_set *set; char *user_config = mkpath("%s/.perfconfig", getenv("HOME")); const char *config_filename; bool changed = false; argc = parse_options(argc, argv, config_options, config_usage, PARSE_OPT_STOP_AT_NON_OPTION); if (use_system_config && use_user_config) { pr_err("Error: only one config file at a time\n"); parse_options_usage(config_usage, config_options, "user", 0); parse_options_usage(NULL, config_options, "system", 0); return -1; } if (use_system_config) config_exclusive_filename = perf_etc_perfconfig(); else if (use_user_config) config_exclusive_filename = user_config; if (!config_exclusive_filename) config_filename = user_config; else config_filename = config_exclusive_filename; /* * At only 'config' sub-command, individually use the config set * because of reinitializing with options config file location. */ set = perf_config_set__new(); if (!set) goto out_err; switch (actions) { case ACTION_LIST: if (argc) { pr_err("Error: takes no arguments\n"); parse_options_usage(config_usage, config_options, "l", 1); } else { do_action_list: if (show_config(set) < 0) { pr_err("Nothing configured, " "please check your %s \n", config_filename); goto out_err; } } break; default: if (!argc) goto do_action_list; for (i = 0; argv[i]; i++) { char *var, *value; char *arg = strdup(argv[i]); if (!arg) { pr_err("%s: strdup failed\n", __func__); goto out_err; } if (parse_config_arg(arg, &var, &value) < 0) { free(arg); goto out_err; } if (value == NULL) { if (show_spec_config(set, var) < 0) { pr_err("%s is not configured: %s\n", var, config_filename); free(arg); goto out_err; } } else { if (perf_config_set__collect(set, config_filename, var, value) < 0) { pr_err("Failed to add '%s=%s'\n", var, value); free(arg); goto out_err; } changed = true; } free(arg); } if (!changed) break; if (set_config(set, config_filename) < 0) { pr_err("Failed to set the configs on %s\n", config_filename); goto out_err; } } ret = 0; out_err: perf_config_set__delete(set); return ret; }