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
16static bool use_system_config, use_user_config;
17
18static const char * const config_usage[] = {
19	"perf config [<file-option>] [options]",
20	NULL
21};
22
23enum actions {
24	ACTION_LIST = 1
25} actions;
26
27static 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
35static 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
46int 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}

  1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * builtin-config.c
  4 *
  5 * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com>
  6 *
  7 */
  8#include "builtin.h"
  9
 
 
 10#include "util/cache.h"
 11#include <subcmd/parse-options.h>
 
 12#include "util/debug.h"
 13#include "util/config.h"
 14#include <linux/string.h>
 15#include <stdio.h>
 16#include <stdlib.h>
 17
 18static bool use_system_config, use_user_config;
 19
 20static const char * const config_usage[] = {
 21	"perf config [<file-option>] [options] [section.name[=value] ...]",
 22	NULL
 23};
 24
 25enum actions {
 26	ACTION_LIST = 1
 27} actions;
 28
 29static 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
 37static int set_config(struct perf_config_set *set, const char *file_name)
 
 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	fprintf(fp, "%s\n", first_line);
 52
 53	/* overwrite configvariables */
 54	perf_config_items__for_each_entry(&set->sections, section) {
 55		if (!use_system_config && section->from_system_config)
 56			continue;
 57		fprintf(fp, "[%s]\n", section->name);
 58
 59		perf_config_items__for_each_entry(&section->items, item) {
 60			if (!use_system_config && item->from_system_config)
 61				continue;
 62			if (item->value)
 63				fprintf(fp, "\t%s = %s\n",
 64					item->name, item->value);
 65		}
 66	}
 67	fclose(fp);
 68
 69	return 0;
 70}
 71
 72static int show_spec_config(struct perf_config_set *set, const char *var)
 73{
 74	struct perf_config_section *section;
 75	struct perf_config_item *item;
 76
 77	if (set == NULL)
 78		return -1;
 79
 80	perf_config_items__for_each_entry(&set->sections, section) {
 81		if (!strstarts(var, section->name))
 82			continue;
 83
 84		perf_config_items__for_each_entry(&section->items, item) {
 85			const char *name = var + strlen(section->name) + 1;
 86
 87			if (strcmp(name, item->name) == 0) {
 88				char *value = item->value;
 89
 90				if (value) {
 91					printf("%s=%s\n", var, value);
 92					return 0;
 93				}
 94			}
 95
 96		}
 97	}
 98
 99	return 0;
100}
101
102static int show_config(struct perf_config_set *set)
103{
104	struct perf_config_section *section;
105	struct perf_config_item *item;
106
107	if (set == NULL)
108		return -1;
109
110	perf_config_set__for_each_entry(set, section, item) {
111		char *value = item->value;
112
113		if (value)
114			printf("%s.%s=%s\n", section->name,
115			       item->name, value);
116	}
117
118	return 0;
119}
120
121static int parse_config_arg(char *arg, char **var, char **value)
122{
123	const char *last_dot = strchr(arg, '.');
124
125	/*
126	 * Since "var" actually contains the section name and the real
127	 * config variable name separated by a dot, we have to know where the dot is.
128	 */
129	if (last_dot == NULL || last_dot == arg) {
130		pr_err("The config variable does not contain a section name: %s\n", arg);
131		return -1;
132	}
133	if (!last_dot[1]) {
134		pr_err("The config variable does not contain a variable name: %s\n", arg);
135		return -1;
136	}
137
138	*value = strchr(arg, '=');
139	if (*value == NULL)
140		*var = arg;
141	else if (!strcmp(*value, "=")) {
142		pr_err("The config variable does not contain a value: %s\n", arg);
143		return -1;
144	} else {
145		*value = *value + 1; /* excluding a first character '=' */
146		*var = strsep(&arg, "=");
147		if (*var[0] == '\0') {
148			pr_err("invalid config variable: %s\n", arg);
149			return -1;
150		}
151	}
152
153	return 0;
154}
155
156int cmd_config(int argc, const char **argv)
157{
158	int i, ret = -1;
159	struct perf_config_set *set;
160	char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
161	const char *config_filename;
162	bool changed = false;
163
164	argc = parse_options(argc, argv, config_options, config_usage,
165			     PARSE_OPT_STOP_AT_NON_OPTION);
166
167	if (use_system_config && use_user_config) {
168		pr_err("Error: only one config file at a time\n");
169		parse_options_usage(config_usage, config_options, "user", 0);
170		parse_options_usage(NULL, config_options, "system", 0);
171		return -1;
172	}
173
174	if (use_system_config)
175		config_exclusive_filename = perf_etc_perfconfig();
176	else if (use_user_config)
177		config_exclusive_filename = user_config;
178
179	if (!config_exclusive_filename)
180		config_filename = user_config;
181	else
182		config_filename = config_exclusive_filename;
183
184	/*
185	 * At only 'config' sub-command, individually use the config set
186	 * because of reinitializing with options config file location.
187	 */
188	set = perf_config_set__new();
189	if (!set)
190		goto out_err;
191
192	switch (actions) {
193	case ACTION_LIST:
194		if (argc) {
195			pr_err("Error: takes no arguments\n");
196			parse_options_usage(config_usage, config_options, "l", 1);
197		} else {
198do_action_list:
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			goto do_action_list;
209
210		for (i = 0; argv[i]; i++) {
211			char *var, *value;
212			char *arg = strdup(argv[i]);
213
214			if (!arg) {
215				pr_err("%s: strdup failed\n", __func__);
216				goto out_err;
217			}
218
219			if (parse_config_arg(arg, &var, &value) < 0) {
220				free(arg);
221				goto out_err;
222			}
223
224			if (value == NULL) {
225				if (show_spec_config(set, var) < 0) {
226					pr_err("%s is not configured: %s\n",
227					       var, config_filename);
228					free(arg);
229					goto out_err;
230				}
231			} else {
232				if (perf_config_set__collect(set, config_filename,
233							     var, value) < 0) {
234					pr_err("Failed to add '%s=%s'\n",
235					       var, value);
236					free(arg);
237					goto out_err;
238				}
239				changed = true;
240			}
241			free(arg);
242		}
243
244		if (!changed)
245			break;
246
247		if (set_config(set, config_filename) < 0) {
248			pr_err("Failed to set the configs on %s\n",
249			       config_filename);
250			goto out_err;
251		}
252	}
253
254	ret = 0;
255out_err:
256	perf_config_set__delete(set);
257	return ret;
258}