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7
8#include "builtin.h"
9
10#include "perf.h"
11
12#include "util/cache.h"
13#include <subcmd/parse-options.h>
14#include "util/util.h"
15#include "util/debug.h"
16#include "util/config.h"
17#include <linux/string.h>
18#include <stdlib.h>
19
20static bool use_system_config, use_user_config;
21
22static const char * const config_usage[] = {
23 "perf config [<file-option>] [options] [section.name[=value] ...]",
24 NULL
25};
26
27enum actions {
28 ACTION_LIST = 1
29} actions;
30
31static struct option config_options[] = {
32 OPT_SET_UINT('l', "list", &actions,
33 "show current config variables", ACTION_LIST),
34 OPT_BOOLEAN(0, "system", &use_system_config, "use system config file"),
35 OPT_BOOLEAN(0, "user", &use_user_config, "use user config file"),
36 OPT_END()
37};
38
39static int set_config(struct perf_config_set *set, const char *file_name)
40{
41 struct perf_config_section *section = NULL;
42 struct perf_config_item *item = NULL;
43 const char *first_line = "# this file is auto-generated.";
44 FILE *fp;
45
46 if (set == NULL)
47 return -1;
48
49 fp = fopen(file_name, "w");
50 if (!fp)
51 return -1;
52
53 fprintf(fp, "%s\n", first_line);
54
55
56 perf_config_items__for_each_entry(&set->sections, section) {
57 if (!use_system_config && section->from_system_config)
58 continue;
59 fprintf(fp, "[%s]\n", section->name);
60
61 perf_config_items__for_each_entry(§ion->items, item) {
62 if (!use_system_config && item->from_system_config)
63 continue;
64 if (item->value)
65 fprintf(fp, "\t%s = %s\n",
66 item->name, item->value);
67 }
68 }
69 fclose(fp);
70
71 return 0;
72}
73
74static int show_spec_config(struct perf_config_set *set, const char *var)
75{
76 struct perf_config_section *section;
77 struct perf_config_item *item;
78
79 if (set == NULL)
80 return -1;
81
82 perf_config_items__for_each_entry(&set->sections, section) {
83 if (!strstarts(var, section->name))
84 continue;
85
86 perf_config_items__for_each_entry(§ion->items, item) {
87 const char *name = var + strlen(section->name) + 1;
88
89 if (strcmp(name, item->name) == 0) {
90 char *value = item->value;
91
92 if (value) {
93 printf("%s=%s\n", var, value);
94 return 0;
95 }
96 }
97
98 }
99 }
100
101 return 0;
102}
103
104static int show_config(struct perf_config_set *set)
105{
106 struct perf_config_section *section;
107 struct perf_config_item *item;
108
109 if (set == NULL)
110 return -1;
111
112 perf_config_set__for_each_entry(set, section, item) {
113 char *value = item->value;
114
115 if (value)
116 printf("%s.%s=%s\n", section->name,
117 item->name, value);
118 }
119
120 return 0;
121}
122
123static int parse_config_arg(char *arg, char **var, char **value)
124{
125 const char *last_dot = strchr(arg, '.');
126
127
128
129
130
131 if (last_dot == NULL || last_dot == arg) {
132 pr_err("The config variable does not contain a section name: %s\n", arg);
133 return -1;
134 }
135 if (!last_dot[1]) {
136 pr_err("The config variable does not contain a variable name: %s\n", arg);
137 return -1;
138 }
139
140 *value = strchr(arg, '=');
141 if (*value == NULL)
142 *var = arg;
143 else if (!strcmp(*value, "=")) {
144 pr_err("The config variable does not contain a value: %s\n", arg);
145 return -1;
146 } else {
147 *value = *value + 1;
148 *var = strsep(&arg, "=");
149 if (*var[0] == '\0') {
150 pr_err("invalid config variable: %s\n", arg);
151 return -1;
152 }
153 }
154
155 return 0;
156}
157
158int cmd_config(int argc, const char **argv)
159{
160 int i, ret = -1;
161 struct perf_config_set *set;
162 char *user_config = mkpath("%s/.perfconfig", getenv("HOME"));
163 const char *config_filename;
164 bool changed = false;
165
166 argc = parse_options(argc, argv, config_options, config_usage,
167 PARSE_OPT_STOP_AT_NON_OPTION);
168
169 if (use_system_config && use_user_config) {
170 pr_err("Error: only one config file at a time\n");
171 parse_options_usage(config_usage, config_options, "user", 0);
172 parse_options_usage(NULL, config_options, "system", 0);
173 return -1;
174 }
175
176 if (use_system_config)
177 config_exclusive_filename = perf_etc_perfconfig();
178 else if (use_user_config)
179 config_exclusive_filename = user_config;
180
181 if (!config_exclusive_filename)
182 config_filename = user_config;
183 else
184 config_filename = config_exclusive_filename;
185
186
187
188
189
190 set = perf_config_set__new();
191 if (!set)
192 goto out_err;
193
194 switch (actions) {
195 case ACTION_LIST:
196 if (argc) {
197 pr_err("Error: takes no arguments\n");
198 parse_options_usage(config_usage, config_options, "l", 1);
199 } else {
200do_action_list:
201 if (show_config(set) < 0) {
202 pr_err("Nothing configured, "
203 "please check your %s \n", config_filename);
204 goto out_err;
205 }
206 }
207 break;
208 default:
209 if (!argc)
210 goto do_action_list;
211
212 for (i = 0; argv[i]; i++) {
213 char *var, *value;
214 char *arg = strdup(argv[i]);
215
216 if (!arg) {
217 pr_err("%s: strdup failed\n", __func__);
218 goto out_err;
219 }
220
221 if (parse_config_arg(arg, &var, &value) < 0) {
222 free(arg);
223 goto out_err;
224 }
225
226 if (value == NULL) {
227 if (show_spec_config(set, var) < 0) {
228 pr_err("%s is not configured: %s\n",
229 var, config_filename);
230 free(arg);
231 goto out_err;
232 }
233 } else {
234 if (perf_config_set__collect(set, config_filename,
235 var, value) < 0) {
236 pr_err("Failed to add '%s=%s'\n",
237 var, value);
238 free(arg);
239 goto out_err;
240 }
241 changed = true;
242 }
243 free(arg);
244 }
245
246 if (!changed)
247 break;
248
249 if (set_config(set, config_filename) < 0) {
250 pr_err("Failed to set the configs on %s\n",
251 config_filename);
252 goto out_err;
253 }
254 }
255
256 ret = 0;
257out_err:
258 perf_config_set__delete(set);
259 return ret;
260}
261
