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Fix: Don't report an error when listing a session with no channels
[lttng-tools.git] / src / bin / lttng / commands / list.c
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CommitLineData
1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
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 _GNU_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
28#include "../command.h"
29
30static int opt_userspace;
31static int opt_kernel;
32static int opt_jul;
33static int opt_log4j;
34static int opt_python;
35static char *opt_channel;
36static int opt_domain;
37static int opt_fields;
38static int opt_syscall;
39#if 0
40/* Not implemented yet */
41static char *opt_cmd_name;
42static pid_t opt_pid;
43#endif
44
45const char *indent4 = " ";
46const char *indent6 = " ";
47const char *indent8 = " ";
48
49enum {
50 OPT_HELP = 1,
51 OPT_USERSPACE,
52 OPT_LIST_OPTIONS,
53};
54
55static struct lttng_handle *handle;
56static struct mi_writer *writer;
57
58static struct poptOption long_options[] = {
59 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
60 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
61 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
62 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
63 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
64 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
65#if 0
66 /* Not implemented yet */
67 {"userspace", 'u', POPT_ARG_STRING | POPT_ARGFLAG_OPTIONAL, &opt_cmd_name, OPT_USERSPACE, 0, 0},
68 {"pid", 'p', POPT_ARG_INT, &opt_pid, 0, 0, 0},
69#else
70 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
71#endif
72 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
73 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
74 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
75 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
76 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
77 {0, 0, 0, 0, 0, 0, 0}
78};
79
80/*
81 * usage
82 */
83static void usage(FILE *ofp)
84{
85 fprintf(ofp, "usage: lttng list [OPTIONS] [SESSION [SESSION OPTIONS]]\n");
86 fprintf(ofp, "\n");
87 fprintf(ofp, "With no arguments, list available tracing session(s)\n");
88 fprintf(ofp, "\n");
89 fprintf(ofp, "Without a session, -k lists available kernel events\n");
90 fprintf(ofp, "Without a session, -u lists available userspace events\n");
91 fprintf(ofp, "\n");
92 fprintf(ofp, " -h, --help Show this help\n");
93 fprintf(ofp, " --list-options Simple listing of options\n");
94 fprintf(ofp, " -k, --kernel Select kernel domain\n");
95 fprintf(ofp, " -u, --userspace Select user-space domain.\n");
96 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
97 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4J\n");
98 fprintf(ofp, " -p, --python Apply for Python application using logging\n");
99 fprintf(ofp, " -f, --fields List event fields.\n");
100 fprintf(ofp, " --syscall List available system calls.\n");
101#if 0
102 fprintf(ofp, " -p, --pid PID List user-space events by PID\n");
103#endif
104 fprintf(ofp, "\n");
105 fprintf(ofp, "Session Options:\n");
106 fprintf(ofp, " -c, --channel NAME List details of a channel\n");
107 fprintf(ofp, " -d, --domain List available domain(s)\n");
108 fprintf(ofp, "\n");
109}
110
111/*
112 * Get command line from /proc for a specific pid.
113 *
114 * On success, return an allocated string pointer to the proc cmdline.
115 * On error, return NULL.
116 */
117static char *get_cmdline_by_pid(pid_t pid)
118{
119 int ret;
120 FILE *fp = NULL;
121 char *cmdline = NULL;
122 char path[20]; /* Can't go bigger than /proc/65535/cmdline */
123
124 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
125 fp = fopen(path, "r");
126 if (fp == NULL) {
127 goto end;
128 }
129
130 /* Caller must free() *cmdline */
131 cmdline = malloc(PATH_MAX);
132 if (!cmdline) {
133 perror("malloc cmdline");
134 goto end;
135 }
136 ret = fread(cmdline, 1, PATH_MAX, fp);
137 if (ret < 0) {
138 perror("fread proc list");
139 }
140
141end:
142 if (fp) {
143 fclose(fp);
144 }
145 return cmdline;
146}
147
148static
149const char *active_string(int value)
150{
151 switch (value) {
152 case 0: return "inactive";
153 case 1: return "active";
154 case -1: return "";
155 default: return NULL;
156 }
157}
158
159static const char *snapshot_string(int value)
160{
161 switch (value) {
162 case 1:
163 return " snapshot";
164 default:
165 return "";
166 }
167}
168
169static
170const char *enabled_string(int value)
171{
172 switch (value) {
173 case 0: return " [disabled]";
174 case 1: return " [enabled]";
175 case -1: return "";
176 default: return NULL;
177 }
178}
179
180static
181const char *filter_string(int value)
182{
183 switch (value) {
184 case 1: return " [with filter]";
185 default: return "";
186 }
187}
188
189static
190const char *exclusion_string(int value)
191{
192 switch (value) {
193 case 1: return " [has exclusions]";
194 default: return "";
195 }
196}
197
198static const char *logleveltype_string(enum lttng_loglevel_type value)
199{
200 switch (value) {
201 case LTTNG_EVENT_LOGLEVEL_ALL:
202 return ":";
203 case LTTNG_EVENT_LOGLEVEL_RANGE:
204 return " <=";
205 case LTTNG_EVENT_LOGLEVEL_SINGLE:
206 return " ==";
207 default:
208 return " <<TYPE UNKN>>";
209 }
210}
211
212static const char *bitness_event(enum lttng_event_flag flags)
213{
214 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
215 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
216 return " [32/64-bit]";
217 } else {
218 return " [32-bit]";
219 }
220 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
221 return " [64-bit]";
222 } else {
223 return "";
224 }
225}
226
227/*
228 * Pretty print single event.
229 */
230static void print_events(struct lttng_event *event)
231{
232 switch (event->type) {
233 case LTTNG_EVENT_TRACEPOINT:
234 {
235 if (event->loglevel != -1) {
236 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
237 indent6,
238 event->name,
239 logleveltype_string(event->loglevel_type),
240 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
241 event->loglevel,
242 enabled_string(event->enabled),
243 exclusion_string(event->exclusion),
244 filter_string(event->filter));
245 } else {
246 MSG("%s%s (type: tracepoint)%s%s%s",
247 indent6,
248 event->name,
249 enabled_string(event->enabled),
250 exclusion_string(event->exclusion),
251 filter_string(event->filter));
252 }
253 break;
254 }
255 case LTTNG_EVENT_FUNCTION:
256 MSG("%s%s (type: function)%s%s", indent6,
257 event->name, enabled_string(event->enabled),
258 filter_string(event->filter));
259 if (event->attr.probe.addr != 0) {
260 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
261 } else {
262 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
263 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
264 }
265 break;
266 case LTTNG_EVENT_PROBE:
267 MSG("%s%s (type: probe)%s%s", indent6,
268 event->name, enabled_string(event->enabled),
269 filter_string(event->filter));
270 if (event->attr.probe.addr != 0) {
271 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
272 } else {
273 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
274 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
275 }
276 break;
277 case LTTNG_EVENT_FUNCTION_ENTRY:
278 MSG("%s%s (type: function)%s%s", indent6,
279 event->name, enabled_string(event->enabled),
280 filter_string(event->filter));
281 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
282 break;
283 case LTTNG_EVENT_SYSCALL:
284 MSG("%s%s%s%s%s", indent6, event->name,
285 (opt_syscall ? "" : " (type:syscall)"),
286 enabled_string(event->enabled),
287 bitness_event(event->flags));
288 break;
289 case LTTNG_EVENT_NOOP:
290 MSG("%s (type: noop)%s%s", indent6,
291 enabled_string(event->enabled),
292 filter_string(event->filter));
293 break;
294 case LTTNG_EVENT_ALL:
295 /* We should never have "all" events in list. */
296 assert(0);
297 break;
298 }
299}
300
301static const char *field_type(struct lttng_event_field *field)
302{
303 switch(field->type) {
304 case LTTNG_EVENT_FIELD_INTEGER:
305 return "integer";
306 case LTTNG_EVENT_FIELD_ENUM:
307 return "enum";
308 case LTTNG_EVENT_FIELD_FLOAT:
309 return "float";
310 case LTTNG_EVENT_FIELD_STRING:
311 return "string";
312 case LTTNG_EVENT_FIELD_OTHER:
313 default: /* fall-through */
314 return "unknown";
315 }
316}
317
318/*
319 * Pretty print single event fields.
320 */
321static void print_event_field(struct lttng_event_field *field)
322{
323 if (!field->field_name[0]) {
324 return;
325 }
326 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
327 field_type(field), field->nowrite ? " [no write]" : "");
328}
329
330/*
331 * Machine interface
332 * Jul and ust event listing
333 */
334static int mi_list_agent_ust_events(struct lttng_event *events, int count,
335 struct lttng_domain *domain)
336{
337 int ret, i;
338 pid_t cur_pid = 0;
339 char *cmdline = NULL;
340 int pid_element_open = 0;
341
342 /* Open domains element */
343 ret = mi_lttng_domains_open(writer);
344 if (ret) {
345 goto end;
346 }
347
348 /* Write domain */
349 ret = mi_lttng_domain(writer, domain, 1);
350 if (ret) {
351 goto end;
352 }
353
354 /* Open pids element */
355 ret = mi_lttng_pids_open(writer);
356 if (ret) {
357 goto end;
358 }
359
360 for (i = 0; i < count; i++) {
361 if (cur_pid != events[i].pid) {
362 if (pid_element_open) {
363 /* Close the previous events and pid element */
364 ret = mi_lttng_close_multi_element(writer, 2);
365 if (ret) {
366 goto end;
367 }
368 pid_element_open = 0;
369 }
370
371 cur_pid = events[i].pid;
372 cmdline = get_cmdline_by_pid(cur_pid);
373 if (!cmdline) {
374 ret = CMD_ERROR;
375 goto end;
376 }
377
378 if (!pid_element_open) {
379 /* Open and write a pid element */
380 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
381 if (ret) {
382 goto error;
383 }
384
385 /* Open events element */
386 ret = mi_lttng_events_open(writer);
387 if (ret) {
388 goto error;
389 }
390
391 pid_element_open = 1;
392 }
393 free(cmdline);
394 }
395
396 /* Write an event */
397 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
398 if (ret) {
399 goto end;
400 }
401 }
402
403 /* Close pids */
404 ret = mi_lttng_writer_close_element(writer);
405 if (ret) {
406 goto end;
407 }
408
409 /* Close domain, domains */
410 ret = mi_lttng_close_multi_element(writer, 2);
411end:
412 return ret;
413error:
414 free(cmdline);
415 return ret;
416}
417
418static int list_agent_events(void)
419{
420 int i, size, ret = CMD_SUCCESS;
421 struct lttng_domain domain;
422 struct lttng_handle *handle;
423 struct lttng_event *event_list;
424 pid_t cur_pid = 0;
425 char *cmdline = NULL;
426 const char *agent_domain_str;
427
428 memset(&domain, 0, sizeof(domain));
429 if (opt_jul) {
430 domain.type = LTTNG_DOMAIN_JUL;
431 } else if (opt_log4j) {
432 domain.type = LTTNG_DOMAIN_LOG4J;
433 } else if (opt_python) {
434 domain.type = LTTNG_DOMAIN_PYTHON;
435 }
436
437 agent_domain_str = get_domain_str(domain.type);
438
439 DBG("Getting %s tracing events", agent_domain_str);
440
441 handle = lttng_create_handle(NULL, &domain);
442 if (handle == NULL) {
443 ret = CMD_ERROR;
444 goto end;
445 }
446
447 size = lttng_list_tracepoints(handle, &event_list);
448 if (size < 0) {
449 ERR("Unable to list %s events: %s", agent_domain_str,
450 lttng_strerror(size));
451 ret = CMD_ERROR;
452 goto end;
453 }
454
455 if (lttng_opt_mi) {
456 /* Mi print */
457 ret = mi_list_agent_ust_events(event_list, size, &domain);
458 if (ret) {
459 ret = CMD_ERROR;
460 goto error;
461 }
462 } else {
463 /* Pretty print */
464 MSG("%s events (Logger name):\n-------------------------",
465 agent_domain_str);
466
467 if (size == 0) {
468 MSG("None");
469 }
470
471 for (i = 0; i < size; i++) {
472 if (cur_pid != event_list[i].pid) {
473 cur_pid = event_list[i].pid;
474 cmdline = get_cmdline_by_pid(cur_pid);
475 if (cmdline == NULL) {
476 ret = CMD_ERROR;
477 goto error;
478 }
479 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
480 free(cmdline);
481 }
482 MSG("%s- %s", indent6, event_list[i].name);
483 }
484
485 MSG("");
486 }
487
488error:
489 free(event_list);
490end:
491 lttng_destroy_handle(handle);
492 return ret;
493}
494
495/*
496 * Ask session daemon for all user space tracepoints available.
497 */
498static int list_ust_events(void)
499{
500 int i, size, ret = CMD_SUCCESS;
501 struct lttng_domain domain;
502 struct lttng_handle *handle;
503 struct lttng_event *event_list;
504 pid_t cur_pid = 0;
505 char *cmdline = NULL;
506
507 memset(&domain, 0, sizeof(domain));
508
509 DBG("Getting UST tracing events");
510
511 domain.type = LTTNG_DOMAIN_UST;
512
513 handle = lttng_create_handle(NULL, &domain);
514 if (handle == NULL) {
515 ret = CMD_ERROR;
516 goto end;
517 }
518
519 size = lttng_list_tracepoints(handle, &event_list);
520 if (size < 0) {
521 ERR("Unable to list UST events: %s", lttng_strerror(size));
522 ret = CMD_ERROR;
523 goto error;
524 }
525
526 if (lttng_opt_mi) {
527 /* Mi print */
528 ret = mi_list_agent_ust_events(event_list, size, &domain);
529 } else {
530 /* Pretty print */
531 MSG("UST events:\n-------------");
532
533 if (size == 0) {
534 MSG("None");
535 }
536
537 for (i = 0; i < size; i++) {
538 if (cur_pid != event_list[i].pid) {
539 cur_pid = event_list[i].pid;
540 cmdline = get_cmdline_by_pid(cur_pid);
541 if (cmdline == NULL) {
542 ret = CMD_ERROR;
543 goto error;
544 }
545 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
546 free(cmdline);
547 }
548 print_events(&event_list[i]);
549 }
550
551 MSG("");
552 }
553
554error:
555 free(event_list);
556end:
557 lttng_destroy_handle(handle);
558 return ret;
559}
560
561/*
562 * Machine interface
563 * List all ust event with their fields
564 */
565static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
566 struct lttng_domain *domain)
567{
568 int ret, i;
569 pid_t cur_pid = 0;
570 char *cmdline = NULL;
571 int pid_element_open = 0;
572 int event_element_open = 0;
573 struct lttng_event cur_event;
574
575 /* Open domains element */
576 ret = mi_lttng_domains_open(writer);
577 if (ret) {
578 goto end;
579 }
580
581 /* Write domain */
582 ret = mi_lttng_domain(writer, domain, 1);
583 if (ret) {
584 goto end;
585 }
586
587 /* Open pids element */
588 ret = mi_lttng_pids_open(writer);
589 if (ret) {
590 goto end;
591 }
592
593 for (i = 0; i < count; i++) {
594 if (cur_pid != fields[i].event.pid) {
595 if (pid_element_open) {
596 if (event_element_open) {
597
598 /* Close the previous field element and event. */
599 ret = mi_lttng_close_multi_element(writer, 2);
600 if (ret) {
601 goto end;
602 }
603 event_element_open = 0;
604 }
605 /* Close the previous events, pid element */
606 ret = mi_lttng_close_multi_element(writer, 2);
607 if (ret) {
608 goto end;
609 }
610 pid_element_open = 0;
611 }
612
613 cur_pid = fields[i].event.pid;
614 cmdline = get_cmdline_by_pid(cur_pid);
615 if (!pid_element_open) {
616 /* Open and write a pid element */
617 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
618 if (ret) {
619 goto error;
620 }
621
622 /* Open events element */
623 ret = mi_lttng_events_open(writer);
624 if (ret) {
625 goto error;
626 }
627 pid_element_open = 1;
628 }
629 free(cmdline);
630 /* Wipe current event since we are about to print a new PID. */
631 memset(&cur_event, 0, sizeof(cur_event));
632 }
633
634 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
635 if (event_element_open) {
636 /* Close the previous fields element and the previous event */
637 ret = mi_lttng_close_multi_element(writer, 2);
638 if (ret) {
639 goto end;
640 }
641 event_element_open = 0;
642 }
643
644 memcpy(&cur_event, &fields[i].event,
645 sizeof(cur_event));
646
647 if (!event_element_open) {
648 /* Open and write the event */
649 ret = mi_lttng_event(writer, &cur_event, 1,
650 handle->domain.type);
651 if (ret) {
652 goto end;
653 }
654
655 /* Open a fields element */
656 ret = mi_lttng_event_fields_open(writer);
657 if (ret) {
658 goto end;
659 }
660 event_element_open = 1;
661 }
662 }
663
664 /* Print the event_field */
665 ret = mi_lttng_event_field(writer, &fields[i]);
666 if (ret) {
667 goto end;
668 }
669 }
670
671 /* Close pids, domain, domains */
672 ret = mi_lttng_close_multi_element(writer, 3);
673end:
674 return ret;
675error:
676 free(cmdline);
677 return ret;
678}
679
680/*
681 * Ask session daemon for all user space tracepoint fields available.
682 */
683static int list_ust_event_fields(void)
684{
685 int i, size, ret = CMD_SUCCESS;
686 struct lttng_domain domain;
687 struct lttng_handle *handle;
688 struct lttng_event_field *event_field_list;
689 pid_t cur_pid = 0;
690 char *cmdline = NULL;
691
692 struct lttng_event cur_event;
693
694 memset(&domain, 0, sizeof(domain));
695 memset(&cur_event, 0, sizeof(cur_event));
696
697 DBG("Getting UST tracing event fields");
698
699 domain.type = LTTNG_DOMAIN_UST;
700
701 handle = lttng_create_handle(NULL, &domain);
702 if (handle == NULL) {
703 ret = CMD_ERROR;
704 goto end;
705 }
706
707 size = lttng_list_tracepoint_fields(handle, &event_field_list);
708 if (size < 0) {
709 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
710 ret = CMD_ERROR;
711 goto end;
712 }
713
714 if (lttng_opt_mi) {
715 /* Mi print */
716 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
717 if (ret) {
718 ret = CMD_ERROR;
719 goto error;
720 }
721 } else {
722 /* Pretty print */
723 MSG("UST events:\n-------------");
724
725 if (size == 0) {
726 MSG("None");
727 }
728
729 for (i = 0; i < size; i++) {
730 if (cur_pid != event_field_list[i].event.pid) {
731 cur_pid = event_field_list[i].event.pid;
732 cmdline = get_cmdline_by_pid(cur_pid);
733 if (cmdline == NULL) {
734 ret = CMD_ERROR;
735 goto error;
736 }
737 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
738 free(cmdline);
739 /* Wipe current event since we are about to print a new PID. */
740 memset(&cur_event, 0, sizeof(cur_event));
741 }
742 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
743 print_events(&event_field_list[i].event);
744 memcpy(&cur_event, &event_field_list[i].event,
745 sizeof(cur_event));
746 }
747 print_event_field(&event_field_list[i]);
748 }
749
750 MSG("");
751 }
752
753error:
754 free(event_field_list);
755end:
756 lttng_destroy_handle(handle);
757 return ret;
758}
759
760/*
761 * Machine interface
762 * Print a list of kernel events
763 */
764static int mi_list_kernel_events(struct lttng_event *events, int count,
765 struct lttng_domain *domain)
766{
767 int ret, i;
768
769 /* Open domains element */
770 ret = mi_lttng_domains_open(writer);
771 if (ret) {
772 goto end;
773 }
774
775 /* Write domain */
776 ret = mi_lttng_domain(writer, domain, 1);
777 if (ret) {
778 goto end;
779 }
780
781 /* Open events */
782 ret = mi_lttng_events_open(writer);
783 if (ret) {
784 goto end;
785 }
786
787 for (i = 0; i < count; i++) {
788 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
789 if (ret) {
790 goto end;
791 }
792 }
793
794 /* close events, domain and domains */
795 ret = mi_lttng_close_multi_element(writer, 3);
796 if (ret) {
797 goto end;
798 }
799
800end:
801 return ret;
802}
803
804/*
805 * Ask for all trace events in the kernel
806 */
807static int list_kernel_events(void)
808{
809 int i, size, ret = CMD_SUCCESS;
810 struct lttng_domain domain;
811 struct lttng_handle *handle;
812 struct lttng_event *event_list;
813
814 memset(&domain, 0, sizeof(domain));
815
816 DBG("Getting kernel tracing events");
817
818 domain.type = LTTNG_DOMAIN_KERNEL;
819
820 handle = lttng_create_handle(NULL, &domain);
821 if (handle == NULL) {
822 ret = CMD_ERROR;
823 goto error;
824 }
825
826 size = lttng_list_tracepoints(handle, &event_list);
827 if (size < 0) {
828 ERR("Unable to list kernel events: %s", lttng_strerror(size));
829 lttng_destroy_handle(handle);
830 return CMD_ERROR;
831 }
832
833 if (lttng_opt_mi) {
834 /* Mi print */
835 ret = mi_list_kernel_events(event_list, size, &domain);
836 if (ret) {
837 ret = CMD_ERROR;
838 goto end;
839 }
840 } else {
841 MSG("Kernel events:\n-------------");
842
843 for (i = 0; i < size; i++) {
844 print_events(&event_list[i]);
845 }
846
847 MSG("");
848 }
849
850end:
851 free(event_list);
852
853 lttng_destroy_handle(handle);
854 return ret;
855
856error:
857 lttng_destroy_handle(handle);
858 return ret;
859}
860
861/*
862 * Machine interface
863 * Print a list of system calls.
864 */
865static int mi_list_syscalls(struct lttng_event *events, int count)
866{
867 int ret, i;
868
869 /* Open events */
870 ret = mi_lttng_events_open(writer);
871 if (ret) {
872 goto end;
873 }
874
875 for (i = 0; i < count; i++) {
876 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
877 if (ret) {
878 goto end;
879 }
880 }
881
882 /* Close events. */
883 ret = mi_lttng_writer_close_element(writer);
884 if (ret) {
885 goto end;
886 }
887
888end:
889 return ret;
890}
891
892/*
893 * Ask for kernel system calls.
894 */
895static int list_syscalls(void)
896{
897 int i, size, ret = CMD_SUCCESS;
898 struct lttng_event *event_list;
899
900 DBG("Getting kernel system call events");
901
902 size = lttng_list_syscalls(&event_list);
903 if (size < 0) {
904 ERR("Unable to list system calls: %s", lttng_strerror(size));
905 ret = CMD_ERROR;
906 goto error;
907 }
908
909 if (lttng_opt_mi) {
910 /* Mi print */
911 ret = mi_list_syscalls(event_list, size);
912 if (ret) {
913 ret = CMD_ERROR;
914 goto end;
915 }
916 } else {
917 MSG("System calls:\n-------------");
918
919 for (i = 0; i < size; i++) {
920 print_events(&event_list[i]);
921 }
922
923 MSG("");
924 }
925
926end:
927 free(event_list);
928 return ret;
929
930error:
931 return ret;
932}
933
934/*
935 * Machine Interface
936 * Print a list of agent events
937 */
938static int mi_list_session_agent_events(struct lttng_event *events, int count)
939{
940 int ret, i;
941
942 /* Open events element */
943 ret = mi_lttng_events_open(writer);
944 if (ret) {
945 goto end;
946 }
947
948 for (i = 0; i < count; i++) {
949 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
950 if (ret) {
951 goto end;
952 }
953 }
954
955 /* Close events element */
956 ret = mi_lttng_writer_close_element(writer);
957
958end:
959 return ret;
960}
961
962/*
963 * List agent events for a specific session using the handle.
964 *
965 * Return CMD_SUCCESS on success else a negative value.
966 */
967static int list_session_agent_events(void)
968{
969 int ret = CMD_SUCCESS, count, i;
970 struct lttng_event *events = NULL;
971
972 count = lttng_list_events(handle, "", &events);
973 if (count < 0) {
974 ret = CMD_ERROR;
975 ERR("%s", lttng_strerror(count));
976 goto error;
977 }
978
979 if (lttng_opt_mi) {
980 /* Mi print */
981 ret = mi_list_session_agent_events(events, count);
982 if (ret) {
983 ret = CMD_ERROR;
984 goto end;
985 }
986 } else {
987 /* Pretty print */
988 MSG("Events (Logger name):\n---------------------");
989 if (count == 0) {
990 MSG("%sNone\n", indent6);
991 goto end;
992 }
993
994 for (i = 0; i < count; i++) {
995 MSG("%s- %s%s (loglevel%s %s)", indent4, events[i].name,
996 enabled_string(events[i].enabled),
997 logleveltype_string(events[i].loglevel_type),
998 mi_lttng_loglevel_string(events[i].loglevel,
999 handle->domain.type));
1000 }
1001
1002 MSG("");
1003 }
1004
1005end:
1006 free(events);
1007error:
1008 return ret;
1009}
1010
1011/*
1012 * Machine interface
1013 * print a list of event
1014 */
1015static int mi_list_events(struct lttng_event *events, int count)
1016{
1017 int ret, i;
1018
1019 /* Open events element */
1020 ret = mi_lttng_events_open(writer);
1021 if (ret) {
1022 goto end;
1023 }
1024
1025 for (i = 0; i < count; i++) {
1026 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1027 if (ret) {
1028 goto end;
1029 }
1030 }
1031
1032 /* Close events element */
1033 ret = mi_lttng_writer_close_element(writer);
1034
1035end:
1036 return ret;
1037}
1038
1039/*
1040 * List events of channel of session and domain.
1041 */
1042static int list_events(const char *channel_name)
1043{
1044 int ret = CMD_SUCCESS, count, i;
1045 struct lttng_event *events = NULL;
1046
1047 count = lttng_list_events(handle, channel_name, &events);
1048 if (count < 0) {
1049 ret = CMD_ERROR;
1050 ERR("%s", lttng_strerror(count));
1051 goto error;
1052 }
1053
1054 if (lttng_opt_mi) {
1055 /* Mi print */
1056 ret = mi_list_events(events, count);
1057 if (ret) {
1058 ret = CMD_ERROR;
1059 goto end;
1060 }
1061 } else {
1062 /* Pretty print */
1063 MSG("\n%sEvents:", indent4);
1064 if (count == 0) {
1065 MSG("%sNone\n", indent6);
1066 goto end;
1067 }
1068
1069 for (i = 0; i < count; i++) {
1070 print_events(&events[i]);
1071 }
1072
1073 MSG("");
1074 }
1075end:
1076 free(events);
1077error:
1078 return ret;
1079}
1080
1081/*
1082 * Pretty print channel
1083 */
1084static void print_channel(struct lttng_channel *channel)
1085{
1086 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1087
1088 MSG("%sAttributes:", indent4);
1089 MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
1090 MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
1091 MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
1092 MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
1093 MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
1094 MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
1095 MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
1096 switch (channel->attr.output) {
1097 case LTTNG_EVENT_SPLICE:
1098 MSG("%soutput: splice()", indent6);
1099 break;
1100 case LTTNG_EVENT_MMAP:
1101 MSG("%soutput: mmap()", indent6);
1102 break;
1103 }
1104}
1105
1106/*
1107 * Machine interface
1108 * Print a list of channel
1109 *
1110 */
1111static int mi_list_channels(struct lttng_channel *channels, int count,
1112 const char *channel_name)
1113{
1114 int i, ret;
1115 unsigned int chan_found = 0;
1116
1117 /* Open channels element */
1118 ret = mi_lttng_channels_open(writer);
1119 if (ret) {
1120 goto error;
1121 }
1122
1123 for (i = 0; i < count; i++) {
1124 if (channel_name != NULL) {
1125 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1126 chan_found = 1;
1127 } else {
1128 continue;
1129 }
1130 }
1131
1132 /* Write channel element and leave it open */
1133 ret = mi_lttng_channel(writer, &channels[i], 1);
1134 if (ret) {
1135 goto error;
1136 }
1137
1138 /* Listing events per channel */
1139 ret = list_events(channels[i].name);
1140 if (ret) {
1141 goto error;
1142 }
1143
1144 /* Closing the channel element we opened earlier */
1145 ret = mi_lttng_writer_close_element(writer);
1146 if (ret) {
1147 goto error;
1148 }
1149
1150 if (chan_found) {
1151 break;
1152 }
1153 }
1154
1155 /* Close channels element */
1156 ret = mi_lttng_writer_close_element(writer);
1157 if (ret) {
1158 goto error;
1159 }
1160
1161error:
1162 return ret;
1163}
1164
1165/*
1166 * List channel(s) of session and domain.
1167 *
1168 * If channel_name is NULL, all channels are listed.
1169 */
1170static int list_channels(const char *channel_name)
1171{
1172 int count, i, ret = CMD_SUCCESS;
1173 unsigned int chan_found = 0;
1174 struct lttng_channel *channels = NULL;
1175
1176 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1177
1178 count = lttng_list_channels(handle, &channels);
1179 if (count < 0) {
1180 switch (-count) {
1181 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1182 if (lttng_opt_mi) {
1183 /* When printing mi this is not an error
1184 * but an empty channels element */
1185 count = 0;
1186 } else {
1187 ret = CMD_SUCCESS;
1188 WARN("No kernel channel");
1189 goto error_channels;
1190 }
1191 break;
1192 default:
1193 /* We had a real error */
1194 ret = CMD_ERROR;
1195 ERR("%s", lttng_strerror(count));
1196 goto error_channels;
1197 break;
1198 }
1199 }
1200
1201 if (lttng_opt_mi) {
1202 /* Mi print */
1203 ret = mi_list_channels(channels, count, channel_name);
1204 if (ret) {
1205 ret = CMD_ERROR;
1206 goto error;
1207 }
1208 } else {
1209 /* Pretty print */
1210 if (count) {
1211 MSG("Channels:\n-------------");
1212 }
1213
1214 for (i = 0; i < count; i++) {
1215 if (channel_name != NULL) {
1216 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1217 chan_found = 1;
1218 } else {
1219 continue;
1220 }
1221 }
1222 print_channel(&channels[i]);
1223
1224 /* Listing events per channel */
1225 ret = list_events(channels[i].name);
1226 if (ret) {
1227 goto error;
1228 }
1229
1230 if (chan_found) {
1231 break;
1232 }
1233 }
1234
1235 if (!chan_found && channel_name != NULL) {
1236 ret = CMD_ERROR;
1237 ERR("Channel %s not found", channel_name);
1238 goto error;
1239 }
1240 }
1241error:
1242 free(channels);
1243
1244error_channels:
1245 return ret;
1246}
1247
1248/*
1249 * Machine interface
1250 * Find the session with session_name as name
1251 * and print his informations.
1252 */
1253static int mi_list_session(const char *session_name,
1254 struct lttng_session *sessions, int count)
1255{
1256 int ret, i;
1257 unsigned int session_found = 0;
1258
1259 if (session_name == NULL) {
1260 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1261 goto end;
1262 }
1263
1264 for (i = 0; i < count; i++) {
1265 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1266 /* We need to leave it open to append other informations
1267 * like domain, channel, events etc.*/
1268 session_found = 1;
1269 ret = mi_lttng_session(writer, &sessions[i], 1);
1270 if (ret) {
1271 goto end;
1272 }
1273 break;
1274 }
1275 }
1276
1277 if (!session_found) {
1278 ERR("Session '%s' not found", session_name);
1279 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1280 goto end;
1281 }
1282
1283end:
1284 return ret;
1285}
1286
1287/*
1288 * Machine interface
1289 * List all availables session
1290 */
1291static int mi_list_sessions(struct lttng_session *sessions, int count)
1292{
1293 int ret, i;
1294
1295 /* Opening sessions element */
1296 ret = mi_lttng_sessions_open(writer);
1297 if (ret) {
1298 goto end;
1299 }
1300
1301 /* Listing sessions */
1302 for (i = 0; i < count; i++) {
1303 ret = mi_lttng_session(writer, &sessions[i], 0);
1304 if (ret) {
1305 goto end;
1306 }
1307 }
1308
1309 /* Closing sessions element */
1310 ret = mi_lttng_writer_close_element(writer);
1311 if (ret) {
1312 goto end;
1313 }
1314
1315end:
1316 return ret;
1317}
1318
1319/*
1320 * List available tracing session. List only basic information.
1321 *
1322 * If session_name is NULL, all sessions are listed.
1323 */
1324static int list_sessions(const char *session_name)
1325{
1326 int ret = CMD_SUCCESS;
1327 int count, i;
1328 unsigned int session_found = 0;
1329 struct lttng_session *sessions;
1330
1331 count = lttng_list_sessions(&sessions);
1332 DBG("Session count %d", count);
1333 if (count < 0) {
1334 ret = CMD_ERROR;
1335 ERR("%s", lttng_strerror(count));
1336 goto end;
1337 }
1338
1339 if (lttng_opt_mi) {
1340 /* Mi */
1341 if (session_name == NULL) {
1342 /* List all session */
1343 ret = mi_list_sessions(sessions, count);
1344 } else {
1345 /* Note : this return an open session element */
1346 ret = mi_list_session(session_name, sessions, count);
1347 }
1348 if (ret) {
1349 ret = CMD_ERROR;
1350 goto error;
1351 }
1352 } else {
1353 /* Pretty print */
1354 if (count == 0) {
1355 MSG("Currently no available tracing session");
1356 goto end;
1357 }
1358
1359 if (session_name == NULL) {
1360 MSG("Available tracing sessions:");
1361 }
1362
1363
1364 for (i = 0; i < count; i++) {
1365 if (session_name != NULL) {
1366 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1367 session_found = 1;
1368 MSG("Tracing session %s: [%s%s]", session_name,
1369 active_string(sessions[i].enabled),
1370 snapshot_string(sessions[i].snapshot_mode));
1371 MSG("%sTrace path: %s\n", indent4, sessions[i].path);
1372 break;
1373 }
1374 } else {
1375 MSG(" %d) %s (%s) [%s%s]", i + 1,
1376 sessions[i].name, sessions[i].path,
1377 active_string(sessions[i].enabled),
1378 snapshot_string(sessions[i].snapshot_mode));
1379 MSG("%sTrace path: %s", indent4, sessions[i].path);
1380 MSG("%sLive timer interval (usec): %u\n", indent4,
1381 sessions[i].live_timer_interval);
1382 }
1383 }
1384
1385 if (!session_found && session_name != NULL) {
1386 ERR("Session '%s' not found", session_name);
1387 ret = CMD_ERROR;
1388 goto error;
1389 }
1390
1391 if (session_name == NULL) {
1392 MSG("\nUse lttng list <session_name> for more details");
1393 }
1394 }
1395
1396error:
1397 free(sessions);
1398end:
1399 return ret;
1400}
1401
1402
1403/*
1404 * Machine Interface
1405 * list available domain(s) for a session.
1406 */
1407static int mi_list_domains(struct lttng_domain *domains, int count)
1408{
1409 int i, ret;
1410 /* Open domains element */
1411 ret = mi_lttng_domains_open(writer);
1412 if (ret) {
1413 goto end;
1414 }
1415
1416 for (i = 0; i < count; i++) {
1417 ret = mi_lttng_domain(writer, &domains[i] , 0);
1418 if (ret) {
1419 goto end;
1420 }
1421 }
1422
1423 /* Closing domains element */
1424 ret = mi_lttng_writer_close_element(writer);
1425 if (ret) {
1426 goto end;
1427 }
1428end:
1429 return ret;
1430}
1431
1432/*
1433 * List available domain(s) for a session.
1434 */
1435static int list_domains(const char *session_name)
1436{
1437 int i, count, ret = CMD_SUCCESS;
1438 struct lttng_domain *domains = NULL;
1439
1440
1441 count = lttng_list_domains(session_name, &domains);
1442 if (count < 0) {
1443 ret = CMD_ERROR;
1444 ERR("%s", lttng_strerror(count));
1445 goto end;
1446 }
1447
1448 if (lttng_opt_mi) {
1449 /* Mi output */
1450 ret = mi_list_domains(domains, count);
1451 if (ret) {
1452 ret = CMD_ERROR;
1453 goto error;
1454 }
1455 } else {
1456 /* Pretty print */
1457 MSG("Domains:\n-------------");
1458 if (count == 0) {
1459 MSG(" None");
1460 goto end;
1461 }
1462
1463 for (i = 0; i < count; i++) {
1464 switch (domains[i].type) {
1465 case LTTNG_DOMAIN_KERNEL:
1466 MSG(" - Kernel");
1467 break;
1468 case LTTNG_DOMAIN_UST:
1469 MSG(" - UST global");
1470 break;
1471 case LTTNG_DOMAIN_JUL:
1472 MSG(" - JUL (Java Util Logging)");
1473 break;
1474 case LTTNG_DOMAIN_LOG4J:
1475 MSG(" - LOG4j (Logging for Java)");
1476 break;
1477 case LTTNG_DOMAIN_PYTHON:
1478 MSG(" - Python (logging)");
1479 break;
1480 default:
1481 break;
1482 }
1483 }
1484 }
1485
1486error:
1487 free(domains);
1488
1489end:
1490 return ret;
1491}
1492
1493/*
1494 * The 'list <options>' first level command
1495 */
1496int cmd_list(int argc, const char **argv)
1497{
1498 int opt, ret = CMD_SUCCESS;
1499 const char *session_name;
1500 static poptContext pc;
1501 struct lttng_domain domain;
1502 struct lttng_domain *domains = NULL;
1503
1504 memset(&domain, 0, sizeof(domain));
1505
1506 if (argc < 1) {
1507 usage(stderr);
1508 ret = CMD_ERROR;
1509 goto end;
1510 }
1511
1512 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1513 poptReadDefaultConfig(pc, 0);
1514
1515 while ((opt = poptGetNextOpt(pc)) != -1) {
1516 switch (opt) {
1517 case OPT_HELP:
1518 usage(stdout);
1519 goto end;
1520 case OPT_USERSPACE:
1521 opt_userspace = 1;
1522 break;
1523 case OPT_LIST_OPTIONS:
1524 list_cmd_options(stdout, long_options);
1525 goto end;
1526 default:
1527 usage(stderr);
1528 ret = CMD_UNDEFINED;
1529 goto end;
1530 }
1531 }
1532
1533 /* Mi check */
1534 if (lttng_opt_mi) {
1535 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1536 if (!writer) {
1537 ret = CMD_ERROR;
1538 goto end;
1539 }
1540
1541 /* Open command element */
1542 ret = mi_lttng_writer_command_open(writer,
1543 mi_lttng_element_command_list);
1544 if (ret) {
1545 ret = CMD_ERROR;
1546 goto end;
1547 }
1548
1549 /* Open output element */
1550 ret = mi_lttng_writer_open_element(writer,
1551 mi_lttng_element_command_output);
1552 if (ret) {
1553 ret = CMD_ERROR;
1554 goto end;
1555 }
1556 }
1557
1558 /* Get session name (trailing argument) */
1559 session_name = poptGetArg(pc);
1560 DBG2("Session name: %s", session_name);
1561
1562 if (opt_kernel) {
1563 domain.type = LTTNG_DOMAIN_KERNEL;
1564 } else if (opt_userspace) {
1565 DBG2("Listing userspace global domain");
1566 domain.type = LTTNG_DOMAIN_UST;
1567 } else if (opt_jul) {
1568 DBG2("Listing JUL domain");
1569 domain.type = LTTNG_DOMAIN_JUL;
1570 } else if (opt_log4j) {
1571 domain.type = LTTNG_DOMAIN_LOG4J;
1572 } else if (opt_python) {
1573 domain.type = LTTNG_DOMAIN_PYTHON;
1574 }
1575
1576 if (!opt_kernel && opt_syscall) {
1577 WARN("--syscall will only work with the Kernel domain (-k)");
1578 ret = CMD_ERROR;
1579 goto end;
1580 }
1581
1582 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
1583 handle = lttng_create_handle(session_name, &domain);
1584 if (handle == NULL) {
1585 ret = CMD_FATAL;
1586 goto end;
1587 }
1588 }
1589
1590 if (session_name == NULL) {
1591 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
1592 && !opt_python) {
1593 ret = list_sessions(NULL);
1594 if (ret) {
1595 goto end;
1596 }
1597 }
1598 if (opt_kernel) {
1599 if (opt_syscall) {
1600 ret = list_syscalls();
1601 if (ret) {
1602 goto end;
1603 }
1604 } else {
1605 ret = list_kernel_events();
1606 if (ret) {
1607 goto end;
1608 }
1609 }
1610 }
1611 if (opt_userspace) {
1612 if (opt_fields) {
1613 ret = list_ust_event_fields();
1614 } else {
1615 ret = list_ust_events();
1616 }
1617 if (ret) {
1618 goto end;
1619 }
1620 }
1621 if (opt_jul || opt_log4j || opt_python) {
1622 ret = list_agent_events();
1623 if (ret) {
1624 goto end;
1625 }
1626 }
1627 } else {
1628 /* List session attributes */
1629 if (lttng_opt_mi) {
1630 /* Open element sessions
1631 * Present for xml consistency */
1632 ret = mi_lttng_sessions_open(writer);
1633 if (ret) {
1634 goto end;
1635 }
1636 }
1637 /* MI: the ouptut of list_sessions is an unclosed session element */
1638 ret = list_sessions(session_name);
1639 if (ret) {
1640 goto end;
1641 }
1642
1643 /* Domain listing */
1644 if (opt_domain) {
1645 ret = list_domains(session_name);
1646 goto end;
1647 }
1648
1649 /* Channel listing */
1650 if (opt_kernel || opt_userspace) {
1651 if (lttng_opt_mi) {
1652 /* Add of domains and domain element for xml
1653 * consistency and validation
1654 */
1655 ret = mi_lttng_domains_open(writer);
1656 if (ret) {
1657 goto end;
1658 }
1659
1660 /* Open domain and leave it open for
1661 * nested channels printing */
1662 ret = mi_lttng_domain(writer, &domain, 1);
1663 if (ret) {
1664 goto end;
1665 }
1666
1667 }
1668
1669 ret = list_channels(opt_channel);
1670 if (ret) {
1671 goto end;
1672 }
1673
1674 if (lttng_opt_mi) {
1675 /* Close domain and domain element */
1676 ret = mi_lttng_close_multi_element(writer, 2);
1677 }
1678 if (ret) {
1679 goto end;
1680 }
1681
1682
1683 } else {
1684 int i, nb_domain;
1685
1686 /* We want all domain(s) */
1687 nb_domain = lttng_list_domains(session_name, &domains);
1688 if (nb_domain < 0) {
1689 ret = CMD_ERROR;
1690 ERR("%s", lttng_strerror(nb_domain));
1691 goto end;
1692 }
1693
1694 if (lttng_opt_mi) {
1695 ret = mi_lttng_domains_open(writer);
1696 if (ret) {
1697 ret = CMD_ERROR;
1698 goto end;
1699 }
1700 }
1701
1702 for (i = 0; i < nb_domain; i++) {
1703 switch (domains[i].type) {
1704 case LTTNG_DOMAIN_KERNEL:
1705 MSG("=== Domain: Kernel ===\n");
1706 break;
1707 case LTTNG_DOMAIN_UST:
1708 MSG("=== Domain: UST global ===\n");
1709 MSG("Buffer type: %s\n",
1710 domains[i].buf_type ==
1711 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
1712 break;
1713 case LTTNG_DOMAIN_JUL:
1714 MSG("=== Domain: JUL (Java Util Logging) ===\n");
1715 break;
1716 case LTTNG_DOMAIN_LOG4J:
1717 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
1718 break;
1719 case LTTNG_DOMAIN_PYTHON:
1720 MSG("=== Domain: Python (logging) ===\n");
1721 break;
1722 default:
1723 MSG("=== Domain: Unimplemented ===\n");
1724 break;
1725 }
1726
1727 if (lttng_opt_mi) {
1728 ret = mi_lttng_domain(writer, &domains[i], 1);
1729 if (ret) {
1730 ret = CMD_ERROR;
1731 goto end;
1732 }
1733 }
1734
1735 /* Clean handle before creating a new one */
1736 if (handle) {
1737 lttng_destroy_handle(handle);
1738 }
1739
1740 handle = lttng_create_handle(session_name, &domains[i]);
1741 if (handle == NULL) {
1742 ret = CMD_FATAL;
1743 goto end;
1744 }
1745
1746 if (domains[i].type == LTTNG_DOMAIN_JUL ||
1747 domains[i].type == LTTNG_DOMAIN_LOG4J ||
1748 domains[i].type == LTTNG_DOMAIN_PYTHON) {
1749 ret = list_session_agent_events();
1750 if (ret) {
1751 goto end;
1752 }
1753 continue;
1754 }
1755
1756 ret = list_channels(opt_channel);
1757 if (ret) {
1758 goto end;
1759 }
1760
1761 if (lttng_opt_mi) {
1762 /* Close domain element */
1763 ret = mi_lttng_writer_close_element(writer);
1764 if (ret) {
1765 ret = CMD_ERROR;
1766 goto end;
1767 }
1768 }
1769
1770 }
1771 if (lttng_opt_mi) {
1772 /* Close the domains, session and sessions element */
1773 ret = mi_lttng_close_multi_element(writer, 3);
1774 if (ret) {
1775 ret = CMD_ERROR;
1776 goto end;
1777 }
1778 }
1779 }
1780 }
1781
1782 /* Mi closing */
1783 if (lttng_opt_mi) {
1784 /* Close output element */
1785 ret = mi_lttng_writer_close_element(writer);
1786 if (ret) {
1787 ret = CMD_ERROR;
1788 goto end;
1789 }
1790
1791 /* Command element close */
1792 ret = mi_lttng_writer_command_close(writer);
1793 if (ret) {
1794 ret = CMD_ERROR;
1795 goto end;
1796 }
1797 }
1798end:
1799 /* Mi clean-up */
1800 if (writer && mi_lttng_writer_destroy(writer)) {
1801 /* Preserve original error code */
1802 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
1803 }
1804
1805 free(domains);
1806 if (handle) {
1807 lttng_destroy_handle(handle);
1808 }
1809
1810 poptFreeContext(pc);
1811 return ret;
1812}
LTTng tools - Deliverables
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