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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
30862f2c TS |
2 | /* |
3 | * builtin-config.c | |
4 | * | |
5 | * Copyright (C) 2015, Taeung Song <treeze.taeung@gmail.com> | |
6 | * | |
7 | */ | |
8 | #include "builtin.h" | |
9 | ||
30862f2c | 10 | #include "util/cache.h" |
4b6ab94e | 11 | #include <subcmd/parse-options.h> |
30862f2c | 12 | #include "util/debug.h" |
860b8d4b | 13 | #include "util/config.h" |
8e99b6d4 | 14 | #include <linux/string.h> |
8520a98d | 15 | #include <stdio.h> |
215a0d30 | 16 | #include <stdlib.h> |
30862f2c | 17 | |
c7ac2417 TS |
18 | static bool use_system_config, use_user_config; |
19 | ||
30862f2c | 20 | static const char * const config_usage[] = { |
c6fc018a | 21 | "perf config [<file-option>] [options] [section.name[=value] ...]", |
30862f2c TS |
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), | |
c7ac2417 TS |
32 | OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"), |
33 | OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"), | |
30862f2c TS |
34 | OPT_END() |
35 | }; | |
36 | ||
5c261555 | 37 | static int set_config(struct perf_config_set *set, const char *file_name) |
c6fc018a TS |
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 | ||
c6fc018a TS |
51 | fprintf(fp, "%s\n", first_line); |
52 | ||
53 | /* overwrite configvariables */ | |
54 | perf_config_items__for_each_entry(&set->sections, section) { | |
08d090cf TS |
55 | if (!use_system_config && section->from_system_config) |
56 | continue; | |
c6fc018a TS |
57 | fprintf(fp, "[%s]\n", section->name); |
58 | ||
59 | perf_config_items__for_each_entry(§ion->items, item) { | |
cba225d6 | 60 | if (!use_system_config && item->from_system_config) |
08d090cf | 61 | continue; |
c6fc018a TS |
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 | ||
90923608 TS |
72 | static 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) { | |
8e99b6d4 | 81 | if (!strstarts(var, section->name)) |
90923608 TS |
82 | continue; |
83 | ||
84 | perf_config_items__for_each_entry(§ion->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 | ||
860b8d4b | 102 | static int show_config(struct perf_config_set *set) |
30862f2c | 103 | { |
860b8d4b TS |
104 | struct perf_config_section *section; |
105 | struct perf_config_item *item; | |
860b8d4b TS |
106 | |
107 | if (set == NULL) | |
108 | return -1; | |
109 | ||
4a35b349 TS |
110 | perf_config_set__for_each_entry(set, section, item) { |
111 | char *value = item->value; | |
860b8d4b | 112 | |
4a35b349 TS |
113 | if (value) |
114 | printf("%s.%s=%s\n", section->name, | |
115 | item->name, value); | |
860b8d4b | 116 | } |
30862f2c TS |
117 | |
118 | return 0; | |
119 | } | |
120 | ||
c6fc018a | 121 | static int parse_config_arg(char *arg, char **var, char **value) |
36662794 TS |
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 | ||
c6fc018a TS |
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 | ||
36662794 TS |
153 | return 0; |
154 | } | |
155 | ||
b0ad8ea6 | 156 | int cmd_config(int argc, const char **argv) |
30862f2c | 157 | { |
dfe1c6d7 | 158 | int i, ret = -1; |
860b8d4b | 159 | struct perf_config_set *set; |
c7ac2417 | 160 | char *user_config = mkpath("%s/.perfconfig", getenv("HOME")); |
4341ec6b | 161 | const char *config_filename; |
5c261555 | 162 | bool changed = false; |
30862f2c TS |
163 | |
164 | argc = parse_options(argc, argv, config_options, config_usage, | |
165 | PARSE_OPT_STOP_AT_NON_OPTION); | |
166 | ||
c7ac2417 TS |
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 | ||
4341ec6b TS |
179 | if (!config_exclusive_filename) |
180 | config_filename = user_config; | |
181 | else | |
182 | config_filename = config_exclusive_filename; | |
183 | ||
8a0a9c7e TS |
184 | /* |
185 | * At only 'config' sub-command, individually use the config set | |
186 | * because of reinitializing with options config file location. | |
187 | */ | |
860b8d4b | 188 | set = perf_config_set__new(); |
dfe1c6d7 | 189 | if (!set) |
860b8d4b | 190 | goto out_err; |
860b8d4b | 191 | |
30862f2c TS |
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 { | |
41e0d040 | 198 | do_action_list: |
dfe1c6d7 | 199 | if (show_config(set) < 0) { |
30862f2c | 200 | pr_err("Nothing configured, " |
c7ac2417 | 201 | "please check your %s \n", config_filename); |
dfe1c6d7 TS |
202 | goto out_err; |
203 | } | |
30862f2c TS |
204 | } |
205 | break; | |
206 | default: | |
41e0d040 ACM |
207 | if (!argc) |
208 | goto do_action_list; | |
36662794 | 209 | |
8c1cedb4 TS |
210 | for (i = 0; argv[i]; i++) { |
211 | char *var, *value; | |
212 | char *arg = strdup(argv[i]); | |
36662794 | 213 | |
8c1cedb4 TS |
214 | if (!arg) { |
215 | pr_err("%s: strdup failed\n", __func__); | |
dfe1c6d7 | 216 | goto out_err; |
8c1cedb4 TS |
217 | } |
218 | ||
219 | if (parse_config_arg(arg, &var, &value) < 0) { | |
36662794 | 220 | free(arg); |
dfe1c6d7 | 221 | goto out_err; |
36662794 | 222 | } |
8c1cedb4 | 223 | |
4f1fd742 | 224 | if (value == NULL) { |
dfe1c6d7 | 225 | if (show_spec_config(set, var) < 0) { |
4f1fd742 TS |
226 | pr_err("%s is not configured: %s\n", |
227 | var, config_filename); | |
228 | free(arg); | |
dfe1c6d7 | 229 | goto out_err; |
4f1fd742 TS |
230 | } |
231 | } else { | |
5c261555 TS |
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); | |
4f1fd742 | 236 | free(arg); |
dfe1c6d7 | 237 | goto out_err; |
4f1fd742 | 238 | } |
5c261555 | 239 | changed = true; |
4f1fd742 | 240 | } |
8c1cedb4 TS |
241 | free(arg); |
242 | } | |
5c261555 TS |
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 | } | |
30862f2c TS |
252 | } |
253 | ||
dfe1c6d7 | 254 | ret = 0; |
860b8d4b | 255 | out_err: |
dfe1c6d7 | 256 | perf_config_set__delete(set); |
30862f2c TS |
257 | return ret; |
258 | } |