Add --override-url option to load command
[lttng-tools.git] / src / bin / lttng / commands / load.c
1 /*
2 * Copyright (C) 2014 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 #define _LGPL_SOURCE
19 #include <inttypes.h>
20 #include <popt.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <assert.h>
25
26 #include <common/mi-lttng.h>
27 #include <common/config/session-config.h>
28 #include <lttng/load.h>
29
30 #include "../command.h"
31
32 static char *opt_input_path;
33 static char *opt_override_url;
34 static int opt_force;
35 static int opt_load_all;
36
37 static const char *session_name;
38
39 enum {
40 OPT_HELP = 1,
41 OPT_ALL,
42 OPT_FORCE,
43 OPT_LIST_OPTIONS,
44 };
45
46 static struct mi_writer *writer;
47
48 static struct poptOption load_opts[] = {
49 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
50 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
51 {"all", 'a', POPT_ARG_NONE, 0, OPT_ALL, 0, 0},
52 {"input-path", 'i', POPT_ARG_STRING, &opt_input_path, 0, 0, 0},
53 {"force", 'f', POPT_ARG_NONE, 0, OPT_FORCE, 0, 0},
54 {"override-url",'U', POPT_ARG_STRING, &opt_override_url, 0, 0, 0},
55 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
56 {0, 0, 0, 0, 0, 0, 0}
57 };
58
59 static int mi_partial_session(const char *session_name)
60 {
61 int ret;
62 assert(writer);
63 assert(session_name);
64
65 /* Open session element */
66 ret = mi_lttng_writer_open_element(writer, config_element_session);
67 if (ret) {
68 goto end;
69 }
70
71 ret = mi_lttng_writer_write_element_string(writer, config_element_name,
72 session_name);
73 if (ret) {
74 goto end;
75 }
76
77 /* Closing session element */
78 ret = mi_lttng_writer_close_element(writer);
79 end:
80 return ret;
81 }
82
83 /*
84 * Mi print of load command
85 */
86 static int mi_load_print(const char *session_name)
87 {
88 int ret;
89 assert(writer);
90
91 if (opt_load_all) {
92 /* We use a wildcard to represent all sessions */
93 session_name = "*";
94 }
95
96 /* Print load element */
97 ret = mi_lttng_writer_open_element(writer, mi_lttng_element_load);
98 if (ret) {
99 goto end;
100 }
101
102 /* Print session element */
103 ret = mi_partial_session(session_name);
104 if (ret) {
105 goto end;
106 }
107
108 /* Path element */
109 if (opt_input_path) {
110 ret = mi_lttng_writer_write_element_string(writer, config_element_path,
111 opt_input_path);
112 if (ret) {
113 goto end;
114 }
115 }
116
117 /* Close load element */
118 ret = mi_lttng_writer_close_element(writer);
119
120 end:
121 return ret;
122 }
123
124 /*
125 * The 'load <options>' first level command
126 */
127 int cmd_load(int argc, const char **argv)
128 {
129 int ret, success;
130 int opt;
131 poptContext pc;
132 struct lttng_load_session_attr *session_attr = NULL;
133 char *input_path = NULL;
134
135 pc = poptGetContext(NULL, argc, argv, load_opts, 0);
136 poptReadDefaultConfig(pc, 0);
137
138 while ((opt = poptGetNextOpt(pc)) != -1) {
139 switch (opt) {
140 case OPT_HELP:
141 SHOW_HELP();
142 ret = CMD_SUCCESS;
143 goto end;
144 case OPT_ALL:
145 opt_load_all = 1;
146 break;
147 case OPT_LIST_OPTIONS:
148 list_cmd_options(stdout, load_opts);
149 ret = CMD_SUCCESS;
150 goto end;
151 case OPT_FORCE:
152 opt_force = 1;
153 break;
154 default:
155 ret = CMD_UNDEFINED;
156 goto end;
157 }
158 }
159
160 ret = lttng_session_daemon_alive();
161 if (!ret) {
162 ERR("No session daemon is available");
163 ret = CMD_ERROR;
164 goto end;
165 }
166
167 if (!opt_load_all) {
168 session_name = poptGetArg(pc);
169 if (session_name) {
170 DBG2("Loading session name: %s", session_name);
171 } else {
172 /* Default to load_all */
173 opt_load_all = 1;
174 }
175 }
176
177 /* Mi check */
178 if (lttng_opt_mi) {
179 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
180 if (!writer) {
181 ret = CMD_ERROR;
182 goto end;
183 }
184
185 /* Open command element */
186 ret = mi_lttng_writer_command_open(writer,
187 mi_lttng_element_command_load);
188 if (ret) {
189 ret = CMD_ERROR;
190 goto end;
191 }
192
193 /* Open output element */
194 ret = mi_lttng_writer_open_element(writer,
195 mi_lttng_element_command_output);
196 if (ret) {
197 ret = CMD_ERROR;
198 goto end;
199 }
200 }
201
202 /* Prepare load attributes */
203 session_attr = lttng_load_session_attr_create();
204 if (!session_attr) {
205 ERR("Failed to create load session attributes");
206 ret = CMD_ERROR;
207 goto end;
208 }
209
210 /*
211 * Set the input url
212 * lttng_load_session_attr_set_input_url only suppports absolute path.
213 * Use realpath to resolve any relative path.
214 * */
215 if (opt_input_path) {
216 input_path = realpath(opt_input_path, NULL);
217 if (!input_path) {
218 PERROR("Invalid input path");
219 ret = CMD_ERROR;
220 goto end;
221 }
222 } else {
223 input_path = NULL;
224 }
225
226 ret = lttng_load_session_attr_set_input_url(session_attr,
227 input_path);
228 if (ret) {
229 ERR("Invalid input path");
230 ret = CMD_ERROR;
231 goto end;
232 }
233
234 /* Set the session name. NULL means all sessions should be loaded */
235 ret = lttng_load_session_attr_set_session_name(session_attr,
236 session_name);
237 if (ret) {
238 ERR("Invalid session name");
239 ret = CMD_ERROR;
240 goto end;
241 }
242
243 /* Set the overwrite attribute */
244 ret = lttng_load_session_attr_set_overwrite(session_attr, opt_force);
245 if (ret) {
246 ERR("Force argument could not be applied");
247 ret = CMD_ERROR;
248 goto end;
249 }
250
251 /* Set the overrides attributes if any */
252 if (opt_override_url) {
253 ret = lttng_load_session_attr_set_override_url(session_attr,
254 opt_override_url);
255 if (ret) {
256 ERR("Url override is invalid");
257 goto end;
258 }
259 }
260
261 ret = lttng_load_session(session_attr);
262 if (ret) {
263 ERR("%s", lttng_strerror(ret));
264 success = 0;
265 ret = CMD_ERROR;
266 } else {
267 if (opt_load_all) {
268 MSG("All sessions have been loaded successfully");
269 } else if (session_name) {
270 ret = config_init((char *) session_name);
271 if (ret < 0) {
272 ret = CMD_WARNING;
273 }
274 MSG("Session %s has been loaded successfully", session_name);
275 } else {
276 MSG("Session has been loaded successfully");
277 }
278
279 if (opt_override_url) {
280 MSG("Session output url overridden with %s", opt_override_url);
281 }
282 success = 1;
283 ret = CMD_SUCCESS;
284 }
285
286 /* Mi Printing and closing */
287 if (lttng_opt_mi) {
288 /* Mi print */
289 ret = mi_load_print(session_name);
290 if (ret) {
291 ret = CMD_ERROR;
292 goto end;
293 }
294
295 /* Close output element */
296 ret = mi_lttng_writer_close_element(writer);
297 if (ret) {
298 ret = CMD_ERROR;
299 goto end;
300 }
301
302 /* Success ? */
303 ret = mi_lttng_writer_write_element_bool(writer,
304 mi_lttng_element_command_success, success);
305 if (ret) {
306 ret = CMD_ERROR;
307 goto end;
308 }
309
310 /* Command element close */
311 ret = mi_lttng_writer_command_close(writer);
312 if (ret) {
313 ret = CMD_ERROR;
314 goto end;
315 }
316 }
317 end:
318 if (writer && mi_lttng_writer_destroy(writer)) {
319 ERR("Failed to destroy mi lttng writer");
320 }
321
322 lttng_load_session_attr_destroy(session_attr);
323 free(input_path);
324 poptFreeContext(pc);
325 return ret;
326 }
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