Commit | Line | Data |
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57f272ed DG |
1 | /* |
2 | * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
57f272ed DG |
20 | #include <assert.h> |
21 | #include <inttypes.h> | |
22 | #include <popt.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | #include <unistd.h> | |
50534d6f | 29 | #include <assert.h> |
57f272ed | 30 | |
a8f307d8 | 31 | #include <common/utils.h> |
50534d6f | 32 | #include <common/mi-lttng.h> |
57f272ed DG |
33 | #include <lttng/snapshot.h> |
34 | ||
35 | #include "../command.h" | |
36 | ||
37 | static const char *opt_session_name; | |
38 | static const char *opt_output_name; | |
39 | static const char *opt_data_url; | |
40 | static const char *opt_ctrl_url; | |
41 | static const char *current_session_name; | |
42 | static uint64_t opt_max_size; | |
43 | ||
44 | /* Stub for the cmd struct actions. */ | |
45 | static int cmd_add_output(int argc, const char **argv); | |
46 | static int cmd_del_output(int argc, const char **argv); | |
47 | static int cmd_list_output(int argc, const char **argv); | |
48 | static int cmd_record(int argc, const char **argv); | |
49 | ||
50 | static const char *indent4 = " "; | |
51 | ||
52 | enum { | |
53 | OPT_HELP = 1, | |
54 | OPT_LIST_OPTIONS, | |
55 | OPT_MAX_SIZE, | |
3c9bd23c | 56 | OPT_LIST_COMMANDS, |
57f272ed DG |
57 | }; |
58 | ||
50534d6f JRJ |
59 | static struct mi_writer *writer; |
60 | ||
57f272ed DG |
61 | static struct poptOption snapshot_opts[] = { |
62 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
63 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
64 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
65 | {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0}, | |
66 | {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0}, | |
67 | {"name", 'n', POPT_ARG_STRING, &opt_output_name, 0, 0, 0}, | |
a8f307d8 | 68 | {"max-size", 'm', POPT_ARG_STRING, 0, OPT_MAX_SIZE, 0, 0}, |
57f272ed | 69 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
3c9bd23c | 70 | {"list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS}, |
57f272ed DG |
71 | {0, 0, 0, 0, 0, 0, 0} |
72 | }; | |
73 | ||
74 | static struct cmd_struct actions[] = { | |
75 | { "add-output", cmd_add_output }, | |
76 | { "del-output", cmd_del_output }, | |
77 | { "list-output", cmd_list_output }, | |
78 | { "record", cmd_record }, | |
79 | { NULL, NULL } /* Array closure */ | |
80 | }; | |
81 | ||
82 | /* | |
83 | * usage | |
84 | */ | |
85 | static void usage(FILE *ofp) | |
86 | { | |
8df3bfe9 | 87 | fprintf(ofp, "usage: lttng snapshot [OPTION] ACTION\n"); |
57f272ed DG |
88 | fprintf(ofp, "\n"); |
89 | fprintf(ofp, "Actions:\n"); | |
90 | fprintf(ofp, " add-output [-m <SIZE>] [-s <NAME>] [-n <NAME>] <URL> | -C <URL> -D <URL>\n"); | |
91 | fprintf(ofp, " Setup and add an snapshot output for a session.\n"); | |
92 | fprintf(ofp, "\n"); | |
e0dcb8bf | 93 | fprintf(ofp, " del-output ID | NAME [-s <NAME>]\n"); |
57f272ed DG |
94 | fprintf(ofp, " Delete an output for a session using the ID.\n"); |
95 | fprintf(ofp, "\n"); | |
96 | fprintf(ofp, " list-output [-s <NAME>]\n"); | |
97 | fprintf(ofp, " List the output of a session.\n"); | |
98 | fprintf(ofp, "\n"); | |
99 | fprintf(ofp, " record [-m <SIZE>] [-s <NAME>] [-n <NAME>] [<URL> | -C <URL> -D <URL>]\n"); | |
100 | fprintf(ofp, " Snapshot a session's buffer(s) for all domains. If an URL is\n"); | |
101 | fprintf(ofp, " specified, it is used instead of a previously added output.\n"); | |
e0dcb8bf DG |
102 | fprintf(ofp, " Specifying only a name or/a size will override the current output value.\n"); |
103 | fprintf(ofp, " For instance, you can record a snapshot with a custom maximum size\n"); | |
104 | fprintf(ofp, " or with a different name.\n"); | |
57f272ed DG |
105 | fprintf(ofp, "\n"); |
106 | fprintf(ofp, "Options:\n"); | |
107 | fprintf(ofp, " -h, --help Show this help\n"); | |
108 | fprintf(ofp, " --list-options Simple listing of options\n"); | |
109 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); | |
110 | fprintf(ofp, " -n, --name NAME Name of the output or snapshot\n"); | |
a8f307d8 | 111 | fprintf(ofp, " -m, --max-size SIZE Maximum bytes size of the snapshot {+k,+M,+G}\n"); |
57f272ed DG |
112 | fprintf(ofp, " -C, --ctrl-url URL Set control path URL. (Must use -D also)\n"); |
113 | fprintf(ofp, " -D, --data-url URL Set data path URL. (Must use -C also)\n"); | |
114 | fprintf(ofp, "\n"); | |
115 | } | |
116 | ||
117 | /* | |
118 | * Count and return the number of arguments in argv. | |
119 | */ | |
120 | static int count_arguments(const char **argv) | |
121 | { | |
122 | int i = 0; | |
123 | ||
124 | assert(argv); | |
125 | ||
126 | while (argv[i] != NULL) { | |
127 | i++; | |
128 | } | |
129 | ||
130 | return i; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Create a snapshot output object from arguments using the given URL. | |
135 | * | |
136 | * Return a newly allocated object or NULL on error. | |
137 | */ | |
138 | static struct lttng_snapshot_output *create_output_from_args(const char *url) | |
139 | { | |
140 | int ret = 0; | |
141 | struct lttng_snapshot_output *output = NULL; | |
142 | ||
143 | output = lttng_snapshot_output_create(); | |
144 | if (!output) { | |
145 | goto error_create; | |
146 | } | |
147 | ||
148 | if (url) { | |
149 | ret = lttng_snapshot_output_set_ctrl_url(url, output); | |
150 | if (ret < 0) { | |
151 | goto error; | |
152 | } | |
153 | } else if (opt_ctrl_url) { | |
154 | ret = lttng_snapshot_output_set_ctrl_url(opt_ctrl_url, output); | |
155 | if (ret < 0) { | |
156 | goto error; | |
157 | } | |
158 | } | |
159 | ||
160 | if (opt_data_url) { | |
161 | ret = lttng_snapshot_output_set_data_url(opt_data_url, output); | |
162 | if (ret < 0) { | |
163 | goto error; | |
164 | } | |
165 | } | |
166 | ||
167 | if (opt_max_size) { | |
168 | ret = lttng_snapshot_output_set_size(opt_max_size, output); | |
169 | if (ret < 0) { | |
170 | goto error; | |
171 | } | |
172 | } | |
173 | ||
174 | if (opt_output_name) { | |
175 | ret = lttng_snapshot_output_set_name(opt_output_name, output); | |
176 | if (ret < 0) { | |
177 | goto error; | |
178 | } | |
179 | } | |
180 | ||
181 | return output; | |
182 | ||
183 | error: | |
184 | lttng_snapshot_output_destroy(output); | |
185 | error_create: | |
186 | return NULL; | |
187 | } | |
188 | ||
50534d6f JRJ |
189 | static int mi_list_output(void) |
190 | { | |
191 | int ret; | |
192 | struct lttng_snapshot_output *s_iter; | |
193 | struct lttng_snapshot_output_list *list; | |
194 | ||
195 | assert(writer); | |
196 | ||
197 | ret = lttng_snapshot_list_output(current_session_name, &list); | |
198 | if (ret < 0) { | |
199 | goto error; | |
200 | } | |
201 | ||
202 | ret = mi_lttng_snapshot_output_session_name(writer, current_session_name); | |
203 | if (ret) { | |
204 | ret = CMD_ERROR; | |
205 | goto end; | |
206 | } | |
207 | ||
208 | while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) { | |
209 | ret = mi_lttng_snapshot_list_output(writer, s_iter); | |
210 | if (ret) { | |
211 | ret = CMD_ERROR; | |
212 | goto end; | |
213 | } | |
214 | } | |
215 | ||
216 | ||
217 | /* Close snapshot snapshots element */ | |
218 | ret = mi_lttng_writer_close_element(writer); | |
219 | if (ret) { | |
220 | ret = CMD_ERROR; | |
221 | goto end; | |
222 | } | |
223 | ||
224 | /* Close snapshot session element */ | |
225 | ret = mi_lttng_writer_close_element(writer); | |
226 | if (ret) { | |
227 | ret = CMD_ERROR; | |
228 | } | |
229 | end: | |
230 | lttng_snapshot_output_list_destroy(list); | |
231 | error: | |
232 | return ret; | |
233 | } | |
234 | ||
57f272ed DG |
235 | static int list_output(void) |
236 | { | |
237 | int ret, output_seen = 0; | |
238 | struct lttng_snapshot_output *s_iter; | |
239 | struct lttng_snapshot_output_list *list; | |
240 | ||
241 | ret = lttng_snapshot_list_output(current_session_name, &list); | |
242 | if (ret < 0) { | |
243 | goto error; | |
244 | } | |
245 | ||
246 | MSG("Snapshot output list for session %s", current_session_name); | |
247 | ||
248 | while ((s_iter = lttng_snapshot_output_list_get_next(list)) != NULL) { | |
c3024823 | 249 | MSG("%s[%" PRIu32 "] %s: %s (max-size: %" PRId64 ")", indent4, |
57f272ed DG |
250 | lttng_snapshot_output_get_id(s_iter), |
251 | lttng_snapshot_output_get_name(s_iter), | |
c3024823 DG |
252 | lttng_snapshot_output_get_ctrl_url(s_iter), |
253 | lttng_snapshot_output_get_maxsize(s_iter)); | |
57f272ed DG |
254 | output_seen = 1; |
255 | } | |
256 | ||
257 | lttng_snapshot_output_list_destroy(list); | |
258 | ||
259 | if (!output_seen) { | |
260 | MSG("%sNone", indent4); | |
261 | } | |
262 | ||
263 | error: | |
264 | return ret; | |
265 | } | |
266 | ||
50534d6f JRJ |
267 | /* |
268 | * Delete output by ID (machine interface version). | |
269 | */ | |
270 | static int mi_del_output(uint32_t id, const char *name) | |
271 | { | |
272 | int ret; | |
273 | struct lttng_snapshot_output *output = NULL; | |
274 | ||
275 | assert(writer); | |
276 | ||
277 | output = lttng_snapshot_output_create(); | |
278 | if (!output) { | |
279 | ret = CMD_FATAL; | |
280 | goto error; | |
281 | } | |
282 | ||
283 | if (name) { | |
284 | ret = lttng_snapshot_output_set_name(name, output); | |
285 | } else if (id != UINT32_MAX) { | |
286 | ret = lttng_snapshot_output_set_id(id, output); | |
287 | } else { | |
288 | ret = CMD_ERROR; | |
289 | goto error; | |
290 | } | |
291 | if (ret < 0) { | |
292 | ret = CMD_FATAL; | |
293 | goto error; | |
294 | } | |
295 | ||
296 | ret = lttng_snapshot_del_output(current_session_name, output); | |
297 | if (ret < 0) { | |
50534d6f JRJ |
298 | goto error; |
299 | } | |
300 | ||
301 | ret = mi_lttng_snapshot_del_output(writer, id, name, current_session_name); | |
302 | if (ret) { | |
303 | ret = CMD_ERROR; | |
304 | } | |
305 | ||
306 | error: | |
307 | lttng_snapshot_output_destroy(output); | |
308 | return ret; | |
309 | } | |
310 | ||
57f272ed DG |
311 | /* |
312 | * Delete output by ID. | |
313 | */ | |
eb240553 | 314 | static int del_output(uint32_t id, const char *name) |
57f272ed DG |
315 | { |
316 | int ret; | |
317 | struct lttng_snapshot_output *output = NULL; | |
318 | ||
319 | output = lttng_snapshot_output_create(); | |
320 | if (!output) { | |
321 | ret = CMD_FATAL; | |
322 | goto error; | |
323 | } | |
324 | ||
eb240553 DG |
325 | if (name) { |
326 | ret = lttng_snapshot_output_set_name(name, output); | |
327 | } else if (id != UINT32_MAX) { | |
328 | ret = lttng_snapshot_output_set_id(id, output); | |
329 | } else { | |
330 | ret = CMD_ERROR; | |
331 | goto error; | |
332 | } | |
57f272ed DG |
333 | if (ret < 0) { |
334 | ret = CMD_FATAL; | |
335 | goto error; | |
336 | } | |
337 | ||
338 | ret = lttng_snapshot_del_output(current_session_name, output); | |
339 | if (ret < 0) { | |
340 | goto error; | |
341 | } | |
342 | ||
eb240553 DG |
343 | if (id != UINT32_MAX) { |
344 | MSG("Snapshot output id %" PRIu32 " successfully deleted for session %s", | |
345 | id, current_session_name); | |
346 | } else { | |
347 | MSG("Snapshot output %s successfully deleted for session %s", | |
348 | name, current_session_name); | |
349 | } | |
57f272ed DG |
350 | |
351 | error: | |
352 | lttng_snapshot_output_destroy(output); | |
353 | return ret; | |
354 | } | |
355 | ||
50534d6f JRJ |
356 | /* |
357 | * Add output from the user URL (machine interface). | |
358 | */ | |
359 | static int mi_add_output(const char *url) | |
360 | { | |
361 | int ret; | |
362 | struct lttng_snapshot_output *output = NULL; | |
363 | char name[NAME_MAX]; | |
364 | const char *n_ptr; | |
365 | ||
366 | if (!url && (!opt_data_url || !opt_ctrl_url)) { | |
367 | ret = CMD_ERROR; | |
368 | goto error; | |
369 | } | |
370 | ||
371 | output = create_output_from_args(url); | |
372 | if (!output) { | |
373 | ret = CMD_FATAL; | |
374 | goto error; | |
375 | } | |
376 | ||
377 | /* This call, if successful, populates the id of the output object. */ | |
378 | ret = lttng_snapshot_add_output(current_session_name, output); | |
379 | if (ret < 0) { | |
50534d6f JRJ |
380 | goto error; |
381 | } | |
382 | ||
383 | n_ptr = lttng_snapshot_output_get_name(output); | |
384 | if (*n_ptr == '\0') { | |
385 | int pret; | |
386 | pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32, | |
387 | lttng_snapshot_output_get_id(output)); | |
388 | if (pret < 0) { | |
389 | PERROR("snprintf add output name"); | |
390 | } | |
391 | n_ptr = name; | |
392 | } | |
393 | ||
394 | ret = mi_lttng_snapshot_add_output(writer, current_session_name, n_ptr, | |
395 | output); | |
396 | if (ret) { | |
397 | ret = CMD_ERROR; | |
398 | } | |
399 | ||
400 | error: | |
401 | lttng_snapshot_output_destroy(output); | |
402 | return ret; | |
403 | } | |
404 | ||
57f272ed DG |
405 | /* |
406 | * Add output from the user URL. | |
407 | */ | |
408 | static int add_output(const char *url) | |
409 | { | |
410 | int ret; | |
411 | struct lttng_snapshot_output *output = NULL; | |
6efe784e DG |
412 | char name[NAME_MAX]; |
413 | const char *n_ptr; | |
57f272ed DG |
414 | |
415 | if (!url && (!opt_data_url || !opt_ctrl_url)) { | |
416 | ret = CMD_ERROR; | |
417 | goto error; | |
418 | } | |
419 | ||
420 | output = create_output_from_args(url); | |
421 | if (!output) { | |
422 | ret = CMD_FATAL; | |
423 | goto error; | |
424 | } | |
425 | ||
426 | /* This call, if successful, populates the id of the output object. */ | |
427 | ret = lttng_snapshot_add_output(current_session_name, output); | |
428 | if (ret < 0) { | |
429 | goto error; | |
430 | } | |
431 | ||
6efe784e DG |
432 | n_ptr = lttng_snapshot_output_get_name(output); |
433 | if (*n_ptr == '\0') { | |
434 | int pret; | |
435 | pret = snprintf(name, sizeof(name), DEFAULT_SNAPSHOT_NAME "-%" PRIu32, | |
436 | lttng_snapshot_output_get_id(output)); | |
437 | if (pret < 0) { | |
438 | PERROR("snprintf add output name"); | |
439 | } | |
440 | n_ptr = name; | |
441 | } | |
442 | ||
57f272ed DG |
443 | MSG("Snapshot output successfully added for session %s", |
444 | current_session_name); | |
445 | MSG(" [%" PRIu32 "] %s: %s (max-size: %" PRId64 ")", | |
6efe784e | 446 | lttng_snapshot_output_get_id(output), n_ptr, |
57f272ed DG |
447 | lttng_snapshot_output_get_ctrl_url(output), |
448 | lttng_snapshot_output_get_maxsize(output)); | |
449 | error: | |
450 | lttng_snapshot_output_destroy(output); | |
451 | return ret; | |
452 | } | |
453 | ||
454 | static int cmd_add_output(int argc, const char **argv) | |
455 | { | |
50534d6f | 456 | int ret; |
57f272ed DG |
457 | |
458 | if (argc < 2 && (!opt_data_url || !opt_ctrl_url)) { | |
459 | usage(stderr); | |
460 | ret = CMD_ERROR; | |
461 | goto end; | |
462 | } | |
463 | ||
50534d6f JRJ |
464 | if (lttng_opt_mi) { |
465 | ret = mi_add_output(argv[1]); | |
466 | } else { | |
467 | ret = add_output(argv[1]); | |
468 | } | |
57f272ed DG |
469 | |
470 | end: | |
471 | return ret; | |
472 | } | |
473 | ||
474 | static int cmd_del_output(int argc, const char **argv) | |
475 | { | |
50534d6f | 476 | int ret; |
eb240553 DG |
477 | char *name; |
478 | long id; | |
57f272ed DG |
479 | |
480 | if (argc < 2) { | |
481 | usage(stderr); | |
482 | ret = CMD_ERROR; | |
483 | goto end; | |
484 | } | |
485 | ||
eb240553 DG |
486 | errno = 0; |
487 | id = strtol(argv[1], &name, 10); | |
488 | if (id == 0 && errno == 0) { | |
50534d6f JRJ |
489 | if (lttng_opt_mi) { |
490 | ret = mi_del_output(UINT32_MAX, name); | |
491 | } else { | |
492 | ret = del_output(UINT32_MAX, name); | |
493 | } | |
eb240553 | 494 | } else if (errno == 0 && *name == '\0') { |
50534d6f JRJ |
495 | if (lttng_opt_mi) { |
496 | ret = mi_del_output(id, NULL); | |
497 | } else { | |
498 | ret = del_output(id, NULL); | |
499 | } | |
eb240553 DG |
500 | } else { |
501 | ERR("Argument %s not recognized", argv[1]); | |
502 | ret = -1; | |
503 | goto end; | |
504 | } | |
57f272ed DG |
505 | |
506 | end: | |
507 | return ret; | |
508 | } | |
509 | ||
510 | static int cmd_list_output(int argc, const char **argv) | |
511 | { | |
50534d6f JRJ |
512 | int ret; |
513 | ||
514 | if (lttng_opt_mi) { | |
515 | ret = mi_list_output(); | |
516 | } else { | |
517 | ret = list_output(); | |
518 | } | |
519 | ||
520 | return ret; | |
521 | } | |
522 | ||
523 | /* | |
524 | * Do a snapshot record with the URL if one is given (machine interface). | |
525 | */ | |
526 | static int mi_record(const char *url) | |
527 | { | |
528 | int ret; | |
529 | struct lttng_snapshot_output *output = NULL; | |
530 | ||
531 | output = create_output_from_args(url); | |
532 | if (!output) { | |
533 | ret = CMD_FATAL; | |
534 | goto error; | |
535 | } | |
536 | ||
537 | ret = lttng_snapshot_record(current_session_name, output, 0); | |
538 | if (ret < 0) { | |
539 | ret = CMD_ERROR; | |
540 | goto error; | |
541 | } | |
542 | ||
543 | ret = mi_lttng_snapshot_record(writer, current_session_name, url, | |
544 | opt_ctrl_url, opt_data_url); | |
545 | if (ret) { | |
546 | ret = CMD_ERROR; | |
547 | } | |
548 | ||
549 | error: | |
550 | lttng_snapshot_output_destroy(output); | |
551 | return ret; | |
57f272ed DG |
552 | } |
553 | ||
554 | /* | |
555 | * Do a snapshot record with the URL if one is given. | |
556 | */ | |
557 | static int record(const char *url) | |
558 | { | |
559 | int ret; | |
560 | struct lttng_snapshot_output *output = NULL; | |
561 | ||
e1986656 DG |
562 | output = create_output_from_args(url); |
563 | if (!output) { | |
564 | ret = CMD_FATAL; | |
565 | goto error; | |
57f272ed DG |
566 | } |
567 | ||
568 | ret = lttng_snapshot_record(current_session_name, output, 0); | |
569 | if (ret < 0) { | |
68808f4e | 570 | if (ret == -LTTNG_ERR_MAX_SIZE_INVALID) { |
d07ceecd | 571 | ERR("Invalid snapshot size. Cannot fit at least one packet per stream."); |
68808f4e | 572 | } |
57f272ed DG |
573 | goto error; |
574 | } | |
575 | ||
576 | MSG("Snapshot recorded successfully for session %s", current_session_name); | |
577 | ||
578 | if (url) { | |
579 | MSG("Snapshot written at: %s", url); | |
580 | } else if (opt_ctrl_url) { | |
581 | MSG("Snapshot written to ctrl: %s, data: %s", opt_ctrl_url, | |
582 | opt_data_url); | |
57f272ed DG |
583 | } |
584 | ||
585 | error: | |
cdcdb9dd | 586 | lttng_snapshot_output_destroy(output); |
57f272ed DG |
587 | return ret; |
588 | } | |
589 | ||
590 | static int cmd_record(int argc, const char **argv) | |
591 | { | |
592 | int ret; | |
593 | ||
594 | if (argc == 2) { | |
595 | /* With a given URL */ | |
50534d6f JRJ |
596 | if (lttng_opt_mi) { |
597 | ret = mi_record(argv[1]); | |
598 | } else { | |
599 | ret = record(argv[1]); | |
600 | } | |
57f272ed | 601 | } else { |
50534d6f JRJ |
602 | if (lttng_opt_mi) { |
603 | ret = mi_record(NULL); | |
604 | } else { | |
605 | ret = record(NULL); | |
606 | } | |
57f272ed DG |
607 | } |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
612 | static int handle_command(const char **argv) | |
613 | { | |
50534d6f | 614 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; |
57f272ed DG |
615 | struct cmd_struct *cmd; |
616 | ||
617 | if (argv == NULL || (!opt_ctrl_url && opt_data_url) || | |
618 | (opt_ctrl_url && !opt_data_url)) { | |
619 | usage(stderr); | |
50534d6f | 620 | command_ret = CMD_ERROR; |
57f272ed DG |
621 | goto end; |
622 | } | |
623 | ||
624 | argc = count_arguments(argv); | |
625 | ||
626 | cmd = &actions[i]; | |
627 | while (cmd->func != NULL) { | |
628 | /* Find command */ | |
629 | if (strcmp(argv[0], cmd->name) == 0) { | |
50534d6f JRJ |
630 | if (lttng_opt_mi) { |
631 | /* Action element */ | |
632 | ret = mi_lttng_writer_open_element(writer, | |
633 | mi_lttng_element_command_action); | |
634 | if (ret) { | |
635 | ret = CMD_ERROR; | |
636 | goto end; | |
637 | } | |
638 | ||
639 | /* Name of the action */ | |
640 | ret = mi_lttng_writer_write_element_string(writer, | |
641 | config_element_name, argv[0]); | |
642 | if (ret) { | |
643 | ret = CMD_ERROR; | |
644 | goto end; | |
645 | } | |
646 | ||
647 | /* Open output element */ | |
648 | ret = mi_lttng_writer_open_element(writer, | |
649 | mi_lttng_element_command_output); | |
650 | if (ret) { | |
651 | ret = CMD_ERROR; | |
652 | goto end; | |
653 | } | |
654 | } | |
655 | ||
656 | command_ret = cmd->func(argc, argv); | |
657 | ||
658 | if (lttng_opt_mi) { | |
659 | /* Close output and action element */ | |
660 | ret = mi_lttng_close_multi_element(writer, 2); | |
661 | if (ret) { | |
662 | ret = CMD_ERROR; | |
663 | goto end; | |
664 | } | |
665 | } | |
57f272ed DG |
666 | goto end; |
667 | } | |
668 | i++; | |
669 | cmd = &actions[i]; | |
670 | } | |
671 | ||
1ec06ed3 | 672 | ret = CMD_UNDEFINED; |
57f272ed DG |
673 | |
674 | end: | |
1ec06ed3 | 675 | /* Overwrite ret if an error occurred in cmd->func() */ |
50534d6f | 676 | ret = command_ret ? command_ret : ret; |
57f272ed DG |
677 | return ret; |
678 | } | |
57f272ed DG |
679 | /* |
680 | * The 'snapshot <cmd> <options>' first level command | |
681 | */ | |
682 | int cmd_snapshot(int argc, const char **argv) | |
683 | { | |
50534d6f | 684 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
57f272ed DG |
685 | char *session_name = NULL; |
686 | static poptContext pc; | |
687 | ||
688 | pc = poptGetContext(NULL, argc, argv, snapshot_opts, 0); | |
689 | poptReadDefaultConfig(pc, 0); | |
690 | ||
50534d6f | 691 | /* Mi check */ |
c7e35b03 | 692 | if (lttng_opt_mi) { |
50534d6f JRJ |
693 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
694 | if (!writer) { | |
695 | ret = -LTTNG_ERR_NOMEM; | |
696 | goto end; | |
697 | } | |
698 | ||
699 | /* Open command element */ | |
700 | ret = mi_lttng_writer_command_open(writer, | |
701 | mi_lttng_element_command_snapshot); | |
702 | if (ret) { | |
703 | ret = CMD_ERROR; | |
704 | goto end; | |
705 | } | |
706 | ||
707 | /* Open output element */ | |
708 | ret = mi_lttng_writer_open_element(writer, | |
709 | mi_lttng_element_command_output); | |
710 | if (ret) { | |
711 | ret = CMD_ERROR; | |
712 | goto end; | |
713 | } | |
c7e35b03 JR |
714 | } |
715 | ||
57f272ed DG |
716 | while ((opt = poptGetNextOpt(pc)) != -1) { |
717 | switch (opt) { | |
718 | case OPT_HELP: | |
719 | usage(stdout); | |
720 | goto end; | |
721 | case OPT_LIST_OPTIONS: | |
722 | list_cmd_options(stdout, snapshot_opts); | |
723 | goto end; | |
3c9bd23c SM |
724 | case OPT_LIST_COMMANDS: |
725 | list_commands(actions, stdout); | |
726 | goto end; | |
57f272ed DG |
727 | case OPT_MAX_SIZE: |
728 | { | |
a8f307d8 | 729 | uint64_t val; |
57f272ed DG |
730 | const char *opt = poptGetOptArg(pc); |
731 | ||
a8f307d8 | 732 | if (utils_parse_size_suffix((char *) opt, &val) < 0) { |
57f272ed DG |
733 | ERR("Unable to handle max-size value %s", opt); |
734 | ret = CMD_ERROR; | |
735 | goto end; | |
736 | } | |
737 | ||
57f272ed DG |
738 | opt_max_size = val; |
739 | ||
740 | break; | |
741 | } | |
742 | default: | |
743 | usage(stderr); | |
744 | ret = CMD_UNDEFINED; | |
745 | goto end; | |
746 | } | |
747 | } | |
748 | ||
749 | if (!opt_session_name) { | |
750 | session_name = get_session_name(); | |
751 | if (session_name == NULL) { | |
752 | ret = CMD_ERROR; | |
753 | goto end; | |
754 | } | |
755 | current_session_name = session_name; | |
756 | } else { | |
757 | current_session_name = opt_session_name; | |
758 | } | |
759 | ||
50534d6f | 760 | command_ret = handle_command(poptGetArgs(pc)); |
1ec06ed3 | 761 | if (command_ret) { |
50534d6f | 762 | switch (-command_ret) { |
7badf927 | 763 | case LTTNG_ERR_EPERM: |
6dc3064a | 764 | ERR("The session needs to be set in no output mode (--no-output)"); |
7badf927 DG |
765 | break; |
766 | case LTTNG_ERR_SNAPSHOT_NODATA: | |
50534d6f | 767 | WARN("%s", lttng_strerror(command_ret)); |
7badf927 DG |
768 | break; |
769 | default: | |
50534d6f | 770 | ERR("%s", lttng_strerror(command_ret)); |
7badf927 | 771 | break; |
6dc3064a | 772 | } |
50534d6f JRJ |
773 | success = 0; |
774 | } | |
775 | ||
776 | if (lttng_opt_mi) { | |
777 | /* Close output element */ | |
778 | ret = mi_lttng_writer_close_element(writer); | |
779 | if (ret) { | |
780 | ret = CMD_ERROR; | |
781 | goto end; | |
782 | } | |
783 | ||
784 | /* Success ? */ | |
785 | ret = mi_lttng_writer_write_element_bool(writer, | |
786 | mi_lttng_element_command_success, success); | |
787 | if (ret) { | |
788 | ret = CMD_ERROR; | |
789 | goto end; | |
790 | } | |
791 | ||
792 | /* Command element close */ | |
793 | ret = mi_lttng_writer_command_close(writer); | |
794 | if (ret) { | |
795 | ret = CMD_ERROR; | |
796 | goto end; | |
797 | } | |
57f272ed DG |
798 | } |
799 | ||
800 | end: | |
50534d6f JRJ |
801 | /* Mi clean-up */ |
802 | if (writer && mi_lttng_writer_destroy(writer)) { | |
803 | /* Preserve original error code */ | |
804 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
805 | } | |
806 | ||
57f272ed DG |
807 | if (!opt_session_name) { |
808 | free(session_name); | |
809 | } | |
50534d6f JRJ |
810 | |
811 | /* Overwrite ret if an error occured during handle_command */ | |
812 | ret = command_ret ? command_ret : ret; | |
57f272ed DG |
813 | poptFreeContext(pc); |
814 | return ret; | |
815 | } |