diff options
Diffstat (limited to 'tools/perf/builtin-config.c')
| -rw-r--r-- | tools/perf/builtin-config.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c new file mode 100644 index 000000000..514f70f95 --- /dev/null +++ b/tools/perf/builtin-config.c @@ -0,0 +1,260 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * builtin-config.c + * + * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com> + * + */ +#include "builtin.h" + +#include "perf.h" + +#include "util/cache.h" +#include <subcmd/parse-options.h> +#include "util/util.h" +#include "util/debug.h" +#include "util/config.h" +#include <linux/string.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 { + if (show_config(set) < 0) { + pr_err("Nothing configured, " + "please check your %s \n", config_filename); + goto out_err; + } + } + break; + default: + if (!argc) { + usage_with_options(config_usage, config_options); + break; + } + + 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; +} |