Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
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 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
a4b92340 | 20 | #include <assert.h> |
ecc48a90 | 21 | #include <ctype.h> |
f3ed775e DG |
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 <time.h> | |
29 | #include <unistd.h> | |
96ec43a8 | 30 | #include <signal.h> |
550b3e4b | 31 | #include <sys/wait.h> |
f3ed775e | 32 | |
37d03ff7 JRJ |
33 | #include <common/mi-lttng.h> |
34 | ||
c399183f | 35 | #include "../command.h" |
679b4943 | 36 | #include "../utils.h" |
f3ed775e | 37 | |
00e2e675 | 38 | #include <common/defaults.h> |
42224349 | 39 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 40 | #include <common/uri.h> |
81b86775 | 41 | #include <common/utils.h> |
16f6f820 | 42 | #include <lttng/snapshot.h> |
42224349 | 43 | |
f3ed775e DG |
44 | static char *opt_output_path; |
45 | static char *opt_session_name; | |
a4b92340 DG |
46 | static char *opt_url; |
47 | static char *opt_ctrl_url; | |
48 | static char *opt_data_url; | |
d7ba1388 | 49 | static char *opt_shm_path; |
a4b92340 | 50 | static int opt_no_consumer; |
96fe6b8d | 51 | static int opt_no_output; |
16f6f820 | 52 | static int opt_snapshot; |
ecc48a90 | 53 | static unsigned int opt_live_timer; |
f3ed775e DG |
54 | |
55 | enum { | |
56 | OPT_HELP = 1, | |
679b4943 | 57 | OPT_LIST_OPTIONS, |
ecc48a90 | 58 | OPT_LIVE_TIMER, |
f3ed775e DG |
59 | }; |
60 | ||
37d03ff7 JRJ |
61 | static struct mi_writer *writer; |
62 | ||
f3ed775e DG |
63 | static struct poptOption long_options[] = { |
64 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
679b4943 SM |
65 | {"help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL}, |
66 | {"output", 'o', POPT_ARG_STRING, &opt_output_path, 0, NULL, NULL}, | |
67 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
23d14dff DG |
68 | {"set-url", 'U', POPT_ARG_STRING, &opt_url, 0, 0, 0}, |
69 | {"ctrl-url", 'C', POPT_ARG_STRING, &opt_ctrl_url, 0, 0, 0}, | |
70 | {"data-url", 'D', POPT_ARG_STRING, &opt_data_url, 0, 0, 0}, | |
96fe6b8d | 71 | {"no-output", 0, POPT_ARG_VAL, &opt_no_output, 1, 0, 0}, |
2bba9e53 | 72 | {"no-consumer", 0, POPT_ARG_VAL, &opt_no_consumer, 1, 0, 0}, |
16f6f820 | 73 | {"snapshot", 0, POPT_ARG_VAL, &opt_snapshot, 1, 0, 0}, |
d73c5802 | 74 | {"live", 0, POPT_ARG_INT | POPT_ARGFLAG_OPTIONAL, 0, OPT_LIVE_TIMER, 0, 0}, |
d7ba1388 | 75 | {"shm-path", 0, POPT_ARG_STRING, &opt_shm_path, 0, 0, 0}, |
f3ed775e DG |
76 | {0, 0, 0, 0, 0, 0, 0} |
77 | }; | |
78 | ||
16de1a24 DG |
79 | /* |
80 | * Please have a look at src/lib/lttng-ctl/lttng-ctl.c for more information on | |
81 | * why this declaration exists and used ONLY in for this command. | |
82 | */ | |
07424f16 | 83 | extern int _lttng_create_session_ext(const char *name, const char *url, |
548527ad | 84 | const char *datetime); |
07424f16 | 85 | |
f3ed775e DG |
86 | /* |
87 | * usage | |
88 | */ | |
89 | static void usage(FILE *ofp) | |
90 | { | |
a4b92340 | 91 | fprintf(ofp, "usage: lttng create [NAME] [OPTIONS] \n"); |
f3ed775e | 92 | fprintf(ofp, "\n"); |
a4b92340 DG |
93 | fprintf(ofp, "Without a given NAME, the default is 'auto-<yyyymmdd>-<hhmmss>'\n"); |
94 | fprintf(ofp, "\n"); | |
95 | fprintf(ofp, "Options:\n"); | |
f3ed775e | 96 | fprintf(ofp, " -h, --help Show this help\n"); |
1c8d13c8 | 97 | fprintf(ofp, " --list-options Simple listing of options\n"); |
58a97671 | 98 | fprintf(ofp, " -o, --output PATH Specify output path for traces\n"); |
96fe6b8d | 99 | fprintf(ofp, " --no-output Traces will not be outputted\n"); |
a2d6893b | 100 | fprintf(ofp, " --snapshot Set the session in snapshot mode.\n"); |
96fe6b8d | 101 | fprintf(ofp, " Created in no-output mode and uses the URL,\n"); |
16f6f820 DG |
102 | fprintf(ofp, " if one, as the default snapshot output.\n"); |
103 | fprintf(ofp, " Every channel will be set in overwrite mode\n"); | |
104 | fprintf(ofp, " and with mmap output (splice not supported).\n"); | |
d73c5802 | 105 | fprintf(ofp, " --live [USEC] Set the session in live-reading mode.\n"); |
ecc48a90 JD |
106 | fprintf(ofp, " The delay parameter in micro-seconds is the\n"); |
107 | fprintf(ofp, " maximum time the user can wait for the data\n"); | |
d73c5802 DG |
108 | fprintf(ofp, " to be flushed. Can be set with a network\n"); |
109 | fprintf(ofp, " URL (-U or -C/-D) and must have a relayd listening.\n"); | |
110 | fprintf(ofp, " By default, %u is used for the timer and the\n", | |
111 | DEFAULT_LTTNG_LIVE_TIMER); | |
112 | fprintf(ofp, " network URL is set to net://127.0.0.1.\n"); | |
d7ba1388 MD |
113 | fprintf(ofp, " --shm-path PATH Path where shared memory holding buffers\n"); |
114 | fprintf(ofp, " should be created. Useful when used with pramfs\n"); | |
115 | fprintf(ofp, " to extract trace data after crash.\n"); | |
a4b92340 DG |
116 | fprintf(ofp, "\n"); |
117 | fprintf(ofp, "Extended Options:\n"); | |
118 | fprintf(ofp, "\n"); | |
119 | fprintf(ofp, "Using these options, each API call can be controlled individually.\n"); | |
120 | fprintf(ofp, "\n"); | |
121 | fprintf(ofp, " -U, --set-url=URL Set URL destination of the trace data.\n"); | |
00e2e675 | 122 | fprintf(ofp, " It is persistent for the session lifetime.\n"); |
a4b92340 | 123 | fprintf(ofp, " This will set both data and control URL.\n"); |
a4b92340 DG |
124 | fprintf(ofp, " -C, --ctrl-url=URL Set control path URL. (Must use -D also)\n"); |
125 | fprintf(ofp, " -D, --data-url=URL Set data path URL. (Must use -C also)\n"); | |
a4b92340 DG |
126 | fprintf(ofp, "\n"); |
127 | fprintf(ofp, "Please refer to the man page (lttng(1)) for more information on network\n"); | |
128 | fprintf(ofp, "streaming mechanisms and explanation of the control and data port\n"); | |
129 | fprintf(ofp, "You must have a running remote lttng-relayd for network streaming\n"); | |
130 | fprintf(ofp, "\n"); | |
131 | fprintf(ofp, "URL format is has followed:\n"); | |
132 | fprintf(ofp, "\n"); | |
133 | fprintf(ofp, " proto://[HOST|IP][:PORT1[:PORT2]][/TRACE_PATH]\n"); | |
134 | fprintf(ofp, "\n"); | |
135 | fprintf(ofp, " Supported protocols are (proto):\n"); | |
136 | fprintf(ofp, " > file://...\n"); | |
137 | fprintf(ofp, " Local filesystem full path.\n"); | |
138 | fprintf(ofp, "\n"); | |
16de1a24 | 139 | fprintf(ofp, " > net[6]://...\n"); |
a4b92340 DG |
140 | fprintf(ofp, " This will use the default network transport layer which is\n"); |
141 | fprintf(ofp, " TCP for both control (PORT1) and data port (PORT2).\n"); | |
142 | fprintf(ofp, " The default ports are respectively 5342 and 5343.\n"); | |
143 | fprintf(ofp, "\n"); | |
0ab61906 | 144 | fprintf(ofp, " > tcp[6]://...\n"); |
a4b92340 DG |
145 | fprintf(ofp, " Can only be used with -C and -D together\n"); |
146 | fprintf(ofp, "\n"); | |
147 | fprintf(ofp, "NOTE: IPv6 address MUST be enclosed in brackets '[]' (rfc2732)\n"); | |
148 | fprintf(ofp, "\n"); | |
149 | fprintf(ofp, "Examples:\n"); | |
150 | fprintf(ofp, " # lttng create -U net://192.168.1.42\n"); | |
151 | fprintf(ofp, " Uses TCP and default ports for the given destination.\n"); | |
152 | fprintf(ofp, " # lttng create -U net6://[fe80::f66d:4ff:fe53:d220]\n"); | |
153 | fprintf(ofp, " Uses TCP, default ports and IPv6.\n"); | |
154 | fprintf(ofp, " # lttng create s1 -U net://myhost.com:3229\n"); | |
155 | fprintf(ofp, " Set the consumer to the remote HOST on port 3229 for control.\n"); | |
f3ed775e DG |
156 | fprintf(ofp, "\n"); |
157 | } | |
158 | ||
37d03ff7 | 159 | /* |
485ca16f | 160 | * Retrieve the created session and mi output it based on provided argument |
37d03ff7 JRJ |
161 | * This is currently a summary of what was pretty printed and is subject to |
162 | * enhancements. | |
37d03ff7 JRJ |
163 | */ |
164 | static int mi_created_session(const char *session_name) | |
165 | { | |
166 | int ret, i, count, found; | |
167 | struct lttng_session *sessions; | |
168 | ||
169 | /* session_name should not be null */ | |
170 | assert(session_name); | |
171 | assert(writer); | |
172 | ||
173 | count = lttng_list_sessions(&sessions); | |
174 | if (count < 0) { | |
175 | ret = count; | |
176 | ERR("%s", lttng_strerror(ret)); | |
177 | goto error; | |
178 | } | |
179 | ||
180 | if (count == 0) { | |
181 | ERR("Error session creation failed: session %s not found", session_name); | |
182 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | found = 0; | |
187 | for (i = 0; i < count; i++) { | |
188 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
189 | found = 1; | |
190 | ret = mi_lttng_session(writer, &sessions[i], 0); | |
191 | if (ret) { | |
192 | goto error; | |
193 | } | |
194 | break; | |
195 | } | |
196 | } | |
197 | ||
198 | if (!found) { | |
199 | ret = -LTTNG_ERR_SESS_NOT_FOUND; | |
200 | } else { | |
201 | ret = CMD_SUCCESS; | |
202 | } | |
203 | ||
204 | error: | |
205 | free(sessions); | |
206 | end: | |
207 | return ret; | |
208 | } | |
209 | ||
00e2e675 | 210 | /* |
a4b92340 | 211 | * For a session name, set the consumer URLs. |
00e2e675 | 212 | */ |
a4b92340 DG |
213 | static int set_consumer_url(const char *session_name, const char *ctrl_url, |
214 | const char *data_url) | |
00e2e675 | 215 | { |
a4b92340 DG |
216 | int ret; |
217 | struct lttng_handle *handle; | |
a4b92340 DG |
218 | |
219 | assert(session_name); | |
220 | ||
221 | /* | |
064e8bfd JG |
222 | * Set handle with the session_name, but no domain. This implies that |
223 | * the actions taken with this handle apply on the tracing session | |
224 | * rather then the domain-specific session. | |
a4b92340 | 225 | */ |
064e8bfd | 226 | handle = lttng_create_handle(session_name, NULL); |
a4b92340 DG |
227 | if (handle == NULL) { |
228 | ret = CMD_FATAL; | |
229 | goto error; | |
230 | } | |
00e2e675 | 231 | |
a4b92340 DG |
232 | ret = lttng_set_consumer_url(handle, ctrl_url, data_url); |
233 | if (ret < 0) { | |
234 | goto error; | |
00e2e675 DG |
235 | } |
236 | ||
a4b92340 DG |
237 | if (ctrl_url) { |
238 | MSG("Control URL %s set for session %s", ctrl_url, session_name); | |
00e2e675 DG |
239 | } |
240 | ||
a4b92340 DG |
241 | if (data_url) { |
242 | MSG("Data URL %s set for session %s", data_url, session_name); | |
243 | } | |
244 | ||
245 | error: | |
246 | lttng_destroy_handle(handle); | |
247 | return ret; | |
248 | } | |
249 | ||
16f6f820 DG |
250 | static int add_snapshot_output(const char *session_name, const char *ctrl_url, |
251 | const char *data_url) | |
252 | { | |
253 | int ret; | |
254 | struct lttng_snapshot_output *output = NULL; | |
255 | ||
256 | assert(session_name); | |
257 | ||
258 | output = lttng_snapshot_output_create(); | |
259 | if (!output) { | |
260 | ret = CMD_FATAL; | |
261 | goto error_create; | |
262 | } | |
263 | ||
264 | if (ctrl_url) { | |
265 | ret = lttng_snapshot_output_set_ctrl_url(ctrl_url, output); | |
266 | if (ret < 0) { | |
267 | goto error; | |
268 | } | |
269 | } | |
270 | ||
271 | if (data_url) { | |
272 | ret = lttng_snapshot_output_set_data_url(data_url, output); | |
273 | if (ret < 0) { | |
274 | goto error; | |
275 | } | |
276 | } | |
277 | ||
278 | /* This call, if successful, populates the id of the output object. */ | |
279 | ret = lttng_snapshot_add_output(session_name, output); | |
280 | if (ret < 0) { | |
281 | goto error; | |
282 | } | |
283 | ||
284 | error: | |
285 | lttng_snapshot_output_destroy(output); | |
286 | error_create: | |
287 | return ret; | |
288 | } | |
289 | ||
f3ed775e | 290 | /* |
1c8d13c8 TD |
291 | * Create a tracing session. |
292 | * If no name is specified, a default name is generated. | |
f3ed775e | 293 | * |
1c8d13c8 | 294 | * Returns one of the CMD_* result constants. |
f3ed775e | 295 | */ |
a4b92340 | 296 | static int create_session(void) |
f3ed775e | 297 | { |
a4b92340 | 298 | int ret; |
07424f16 | 299 | char *session_name = NULL, *traces_path = NULL, *alloc_path = NULL; |
a4b92340 | 300 | char *alloc_url = NULL, *url = NULL, datetime[16]; |
487b253b | 301 | char session_name_date[NAME_MAX + 17], *print_str_url = NULL; |
f3ed775e DG |
302 | time_t rawtime; |
303 | struct tm *timeinfo; | |
d7ba1388 | 304 | char shm_path[PATH_MAX] = ""; |
f3ed775e | 305 | |
d6175221 DG |
306 | /* Get date and time for automatic session name/path */ |
307 | time(&rawtime); | |
308 | timeinfo = localtime(&rawtime); | |
309 | strftime(datetime, sizeof(datetime), "%Y%m%d-%H%M%S", timeinfo); | |
310 | ||
f3ed775e DG |
311 | /* Auto session name creation */ |
312 | if (opt_session_name == NULL) { | |
07424f16 DG |
313 | ret = snprintf(session_name_date, sizeof(session_name_date), |
314 | DEFAULT_SESSION_NAME "-%s", datetime); | |
d6175221 | 315 | if (ret < 0) { |
07424f16 DG |
316 | PERROR("snprintf session name"); |
317 | goto error; | |
318 | } | |
04965770 | 319 | session_name = session_name_date; |
07424f16 | 320 | DBG("Auto session name set to %s", session_name_date); |
f3ed775e | 321 | } else { |
487b253b DG |
322 | if (strlen(opt_session_name) > NAME_MAX) { |
323 | ERR("Session name too long. Length must be lower or equal to %d", | |
324 | NAME_MAX); | |
325 | ret = LTTNG_ERR_SESSION_FAIL; | |
326 | goto error; | |
327 | } | |
4b861950 DG |
328 | /* |
329 | * Check if the session name begins with "auto-" or is exactly "auto". | |
330 | * Both are reserved for the default session name. See bug #449 to | |
331 | * understand why we need to check both here. | |
332 | */ | |
333 | if ((strncmp(opt_session_name, DEFAULT_SESSION_NAME "-", | |
334 | strlen(DEFAULT_SESSION_NAME) + 1) == 0) || | |
335 | (strncmp(opt_session_name, DEFAULT_SESSION_NAME, | |
61b35a5a | 336 | strlen(DEFAULT_SESSION_NAME)) == 0 && |
4b861950 | 337 | strlen(opt_session_name) == strlen(DEFAULT_SESSION_NAME))) { |
61b35a5a DG |
338 | ERR("%s is a reserved keyword for default session(s)", |
339 | DEFAULT_SESSION_NAME); | |
340 | ret = CMD_ERROR; | |
341 | goto error; | |
342 | } | |
f3ed775e | 343 | session_name = opt_session_name; |
07424f16 DG |
344 | ret = snprintf(session_name_date, sizeof(session_name_date), |
345 | "%s-%s", session_name, datetime); | |
346 | if (ret < 0) { | |
347 | PERROR("snprintf session name"); | |
348 | goto error; | |
349 | } | |
f3ed775e DG |
350 | } |
351 | ||
1a241656 DG |
352 | if ((!opt_ctrl_url && opt_data_url) || (opt_ctrl_url && !opt_data_url)) { |
353 | ERR("You need both control and data URL."); | |
354 | ret = CMD_ERROR; | |
355 | goto error; | |
356 | } | |
357 | ||
785d2d0d | 358 | if (opt_output_path != NULL) { |
81b86775 | 359 | traces_path = utils_expand_path(opt_output_path); |
00e2e675 DG |
360 | if (traces_path == NULL) { |
361 | ret = CMD_ERROR; | |
362 | goto error; | |
363 | } | |
364 | ||
37d03ff7 | 365 | /* Create URL string from the local file system path */ |
a4b92340 | 366 | ret = asprintf(&alloc_url, "file://%s", traces_path); |
00e2e675 | 367 | if (ret < 0) { |
a4b92340 | 368 | PERROR("asprintf url path"); |
00e2e675 DG |
369 | ret = CMD_FATAL; |
370 | goto error; | |
371 | } | |
a4b92340 DG |
372 | /* URL to use in the lttng_create_session() call */ |
373 | url = alloc_url; | |
40b03f52 | 374 | print_str_url = traces_path; |
a4b92340 DG |
375 | } else if (opt_url) { /* Handling URL (-U opt) */ |
376 | url = opt_url; | |
40b03f52 | 377 | print_str_url = url; |
1a241656 DG |
378 | } else if (opt_data_url && opt_ctrl_url) { |
379 | /* | |
380 | * With both control and data, we'll be setting the consumer URL after | |
381 | * session creation thus use no URL. | |
382 | */ | |
383 | url = NULL; | |
2bba9e53 | 384 | } else if (!opt_no_output) { |
ab2e5c7c MD |
385 | char *tmp_path; |
386 | ||
00e2e675 | 387 | /* Auto output path */ |
ab2e5c7c MD |
388 | tmp_path = utils_get_home_dir(); |
389 | if (tmp_path == NULL) { | |
d386b234 | 390 | ERR("HOME path not found.\n \ |
00e2e675 | 391 | Please specify an output path using -o, --output PATH"); |
f3ed775e DG |
392 | ret = CMD_FATAL; |
393 | goto error; | |
394 | } | |
ab2e5c7c MD |
395 | alloc_path = strdup(tmp_path); |
396 | if (!alloc_path) { | |
397 | PERROR("allocating alloc_path"); | |
398 | ret = CMD_FATAL; | |
399 | goto error; | |
400 | } | |
07424f16 DG |
401 | ret = asprintf(&alloc_url, |
402 | "file://%s/" DEFAULT_TRACE_DIR_NAME "/%s", | |
403 | alloc_path, session_name_date); | |
58a97671 | 404 | if (ret < 0) { |
00e2e675 DG |
405 | PERROR("asprintf trace dir name"); |
406 | ret = CMD_FATAL; | |
58a97671 DG |
407 | goto error; |
408 | } | |
00e2e675 | 409 | |
a4b92340 | 410 | url = alloc_url; |
1a241656 | 411 | print_str_url = alloc_url + strlen("file://"); |
2bba9e53 | 412 | } else { |
96fe6b8d | 413 | /* No output means --no-output or --snapshot mode. */ |
2bba9e53 | 414 | url = NULL; |
00e2e675 DG |
415 | } |
416 | ||
1a241656 | 417 | /* Use default live URL if NO url is/are found. */ |
ecc48a90 | 418 | if ((opt_live_timer && !opt_url) && (opt_live_timer && !opt_data_url)) { |
d73c5802 DG |
419 | ret = asprintf(&alloc_url, "net://127.0.0.1"); |
420 | if (ret < 0) { | |
421 | PERROR("asprintf default live URL"); | |
422 | ret = CMD_FATAL; | |
423 | goto error; | |
424 | } | |
425 | url = alloc_url; | |
426 | print_str_url = url; | |
ecc48a90 JD |
427 | } |
428 | ||
429 | if (opt_snapshot && opt_live_timer) { | |
430 | ERR("Snapshot and live modes are mutually exclusive."); | |
431 | ret = CMD_ERROR; | |
432 | goto error; | |
433 | } | |
434 | ||
16f6f820 DG |
435 | if (opt_snapshot) { |
436 | /* No output by default. */ | |
437 | const char *snapshot_url = NULL; | |
438 | ||
439 | if (opt_url) { | |
440 | snapshot_url = url; | |
441 | } else if (!opt_data_url && !opt_ctrl_url) { | |
442 | /* This is the session path that we need to use as output. */ | |
443 | snapshot_url = url; | |
444 | } | |
445 | ret = lttng_create_session_snapshot(session_name, snapshot_url); | |
ecc48a90 | 446 | } else if (opt_live_timer) { |
8960e9cd DG |
447 | const char *pathname; |
448 | ||
449 | if (opt_relayd_path) { | |
450 | pathname = opt_relayd_path; | |
451 | } else { | |
452 | pathname = INSTALL_BIN_PATH "/lttng-relayd"; | |
453 | } | |
2c521c63 DG |
454 | if (!opt_url && !opt_data_url && !check_relayd() && |
455 | spawn_relayd(pathname, 0) < 0) { | |
8960e9cd DG |
456 | goto error; |
457 | } | |
ecc48a90 | 458 | ret = lttng_create_session_live(session_name, url, opt_live_timer); |
16f6f820 | 459 | } else { |
548527ad | 460 | ret = _lttng_create_session_ext(session_name, url, datetime); |
16f6f820 | 461 | } |
f3ed775e | 462 | if (ret < 0) { |
ae856491 | 463 | /* Don't set ret so lttng can interpret the sessiond error. */ |
42224349 | 464 | switch (-ret) { |
f73fabfd | 465 | case LTTNG_ERR_EXIST_SESS: |
42224349 DG |
466 | WARN("Session %s already exists", session_name); |
467 | break; | |
60e835ca | 468 | default: |
60e835ca | 469 | break; |
42224349 | 470 | } |
f3ed775e DG |
471 | goto error; |
472 | } | |
473 | ||
0ab61906 | 474 | if (opt_ctrl_url && opt_data_url) { |
16f6f820 DG |
475 | if (opt_snapshot) { |
476 | ret = add_snapshot_output(session_name, opt_ctrl_url, | |
477 | opt_data_url); | |
478 | } else { | |
479 | /* Setting up control URI (-C or/and -D opt) */ | |
480 | ret = set_consumer_url(session_name, opt_ctrl_url, opt_data_url); | |
481 | } | |
a4b92340 | 482 | if (ret < 0) { |
4f50c803 DG |
483 | /* Destroy created session because the URL are not valid. */ |
484 | lttng_destroy_session(session_name); | |
a4b92340 DG |
485 | goto error; |
486 | } | |
4f50c803 DG |
487 | } |
488 | ||
d7ba1388 MD |
489 | if (opt_shm_path) { |
490 | ret = snprintf(shm_path, sizeof(shm_path), | |
491 | "%s/%s", opt_shm_path, session_name_date); | |
492 | if (ret < 0) { | |
493 | PERROR("snprintf shm_path"); | |
494 | goto error; | |
495 | } | |
496 | ||
497 | ret = lttng_set_session_shm_path(session_name, shm_path); | |
498 | if (ret < 0) { | |
499 | lttng_destroy_session(session_name); | |
500 | goto error; | |
501 | } | |
502 | } | |
503 | ||
4f50c803 | 504 | MSG("Session %s created.", session_name); |
16f6f820 | 505 | if (print_str_url && !opt_snapshot) { |
4f50c803 | 506 | MSG("Traces will be written in %s", print_str_url); |
d73c5802 DG |
507 | |
508 | if (opt_live_timer) { | |
509 | MSG("Live timer set to %u usec", opt_live_timer); | |
510 | } | |
16f6f820 DG |
511 | } else if (opt_snapshot) { |
512 | if (print_str_url) { | |
513 | MSG("Default snapshot output set to: %s", print_str_url); | |
514 | } | |
515 | MSG("Snapshot mode set. Every channel enabled for that session will " | |
1daafe0d | 516 | "be set in overwrite mode and mmap output."); |
a4b92340 | 517 | } |
d7ba1388 MD |
518 | if (opt_shm_path) { |
519 | MSG("Session %s set to shm_path: %s.", session_name, | |
520 | shm_path); | |
521 | } | |
a4b92340 | 522 | |
37d03ff7 JRJ |
523 | /* Mi output */ |
524 | if (lttng_opt_mi) { | |
525 | ret = mi_created_session(session_name); | |
526 | if (ret) { | |
527 | ret = CMD_ERROR; | |
528 | goto error; | |
529 | } | |
530 | } | |
531 | ||
58a97671 DG |
532 | /* Init lttng session config */ |
533 | ret = config_init(session_name); | |
f3ed775e | 534 | if (ret < 0) { |
27089920 | 535 | ret = CMD_ERROR; |
f3ed775e DG |
536 | goto error; |
537 | } | |
538 | ||
f3ed775e DG |
539 | ret = CMD_SUCCESS; |
540 | ||
541 | error: | |
0e428499 DG |
542 | free(alloc_url); |
543 | free(traces_path); | |
87f222b6 | 544 | free(alloc_path); |
a4b92340 DG |
545 | |
546 | if (ret < 0) { | |
547 | ERR("%s", lttng_strerror(ret)); | |
548 | } | |
f3ed775e DG |
549 | return ret; |
550 | } | |
551 | ||
96ec43a8 JG |
552 | /* |
553 | * spawn_sessiond | |
554 | * | |
555 | * Spawn a session daemon by forking and execv. | |
556 | */ | |
557 | static int spawn_sessiond(char *pathname) | |
558 | { | |
559 | int ret = 0; | |
560 | pid_t pid; | |
561 | ||
562 | MSG("Spawning a session daemon"); | |
96ec43a8 JG |
563 | pid = fork(); |
564 | if (pid == 0) { | |
565 | /* | |
550b3e4b | 566 | * Spawn session daemon in daemon mode. |
96ec43a8 | 567 | */ |
550b3e4b PP |
568 | execlp(pathname, "lttng-sessiond", |
569 | "--daemonize", NULL); | |
96ec43a8 JG |
570 | /* execlp only returns if error happened */ |
571 | if (errno == ENOENT) { | |
572 | ERR("No session daemon found. Use --sessiond-path."); | |
573 | } else { | |
574 | PERROR("execlp"); | |
575 | } | |
576 | kill(getppid(), SIGTERM); /* wake parent */ | |
577 | exit(EXIT_FAILURE); | |
578 | } else if (pid > 0) { | |
96ec43a8 | 579 | /* |
550b3e4b PP |
580 | * In daemon mode (--daemonize), sessiond only exits when |
581 | * it's ready to accept commands. | |
96ec43a8 | 582 | */ |
550b3e4b | 583 | for (;;) { |
09eea2d6 JG |
584 | int status; |
585 | pid_t wait_pid_ret = waitpid(pid, &status, 0); | |
586 | ||
587 | if (wait_pid_ret < 0) { | |
588 | if (errno == EINTR) { | |
589 | continue; | |
590 | } | |
591 | PERROR("waitpid"); | |
592 | ret = -errno; | |
593 | goto end; | |
594 | } | |
550b3e4b PP |
595 | |
596 | if (WIFSIGNALED(status)) { | |
597 | ERR("Session daemon was killed by signal %d", | |
598 | WTERMSIG(status)); | |
599 | ret = -1; | |
600 | goto end; | |
601 | } else if (WIFEXITED(status)) { | |
602 | DBG("Session daemon terminated normally (exit status: %d)", | |
603 | WEXITSTATUS(status)); | |
604 | ||
605 | if (WEXITSTATUS(status) != 0) { | |
606 | ERR("Session daemon terminated with an error (exit status: %d)", | |
607 | WEXITSTATUS(status)); | |
608 | ret = -1; | |
609 | goto end; | |
610 | } | |
611 | break; | |
612 | } | |
96ec43a8 | 613 | } |
550b3e4b | 614 | |
96ec43a8 JG |
615 | goto end; |
616 | } else { | |
617 | PERROR("fork"); | |
618 | ret = -1; | |
619 | goto end; | |
620 | } | |
621 | ||
622 | end: | |
623 | return ret; | |
624 | } | |
625 | ||
626 | /* | |
627 | * launch_sessiond | |
628 | * | |
629 | * Check if the session daemon is available using | |
630 | * the liblttngctl API for the check. If not, try to | |
631 | * spawn a daemon. | |
632 | */ | |
633 | static int launch_sessiond(void) | |
634 | { | |
635 | int ret; | |
636 | char *pathname = NULL; | |
637 | ||
638 | ret = lttng_session_daemon_alive(); | |
639 | if (ret) { | |
640 | /* Sessiond is alive, not an error */ | |
641 | ret = 0; | |
642 | goto end; | |
643 | } | |
644 | ||
645 | /* Try command line option path */ | |
646 | pathname = opt_sessiond_path; | |
647 | ||
648 | /* Try LTTNG_SESSIOND_PATH env variable */ | |
649 | if (pathname == NULL) { | |
650 | pathname = getenv(DEFAULT_SESSIOND_PATH_ENV); | |
651 | } | |
652 | ||
653 | /* Try with configured path */ | |
654 | if (pathname == NULL) { | |
655 | if (CONFIG_SESSIOND_BIN[0] != '\0') { | |
656 | pathname = CONFIG_SESSIOND_BIN; | |
657 | } | |
658 | } | |
659 | ||
660 | /* Try the default path */ | |
661 | if (pathname == NULL) { | |
662 | pathname = INSTALL_BIN_PATH "/lttng-sessiond"; | |
663 | } | |
664 | ||
665 | DBG("Session daemon binary path: %s", pathname); | |
666 | ||
667 | /* Check existence and permissions */ | |
668 | ret = access(pathname, F_OK | X_OK); | |
669 | if (ret < 0) { | |
670 | ERR("No such file or access denied: %s", pathname); | |
671 | goto end; | |
672 | } | |
673 | ||
674 | ret = spawn_sessiond(pathname); | |
96ec43a8 | 675 | end: |
fcbf4ae7 JG |
676 | if (ret) { |
677 | ERR("Problem occurred while launching session daemon (%s)", | |
678 | pathname); | |
679 | } | |
96ec43a8 JG |
680 | return ret; |
681 | } | |
682 | ||
f3ed775e | 683 | /* |
74cc1d0f | 684 | * The 'create <options>' first level command |
1c8d13c8 TD |
685 | * |
686 | * Returns one of the CMD_* result constants. | |
f3ed775e DG |
687 | */ |
688 | int cmd_create(int argc, const char **argv) | |
689 | { | |
37d03ff7 | 690 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
ecc48a90 | 691 | char *opt_arg = NULL; |
f3ed775e DG |
692 | static poptContext pc; |
693 | ||
694 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
695 | poptReadDefaultConfig(pc, 0); | |
696 | ||
697 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
698 | switch (opt) { | |
699 | case OPT_HELP: | |
27089920 | 700 | usage(stdout); |
f3ed775e | 701 | goto end; |
679b4943 SM |
702 | case OPT_LIST_OPTIONS: |
703 | list_cmd_options(stdout, long_options); | |
679b4943 | 704 | goto end; |
ecc48a90 JD |
705 | case OPT_LIVE_TIMER: |
706 | { | |
707 | unsigned long v; | |
708 | ||
709 | errno = 0; | |
710 | opt_arg = poptGetOptArg(pc); | |
d73c5802 DG |
711 | if (!opt_arg) { |
712 | /* Set up default values. */ | |
713 | opt_live_timer = (uint32_t) DEFAULT_LTTNG_LIVE_TIMER; | |
714 | DBG("Session live timer interval set to default value %d", | |
715 | opt_live_timer); | |
716 | break; | |
717 | } | |
718 | ||
ecc48a90 JD |
719 | v = strtoul(opt_arg, NULL, 0); |
720 | if (errno != 0 || !isdigit(opt_arg[0])) { | |
721 | ERR("Wrong value in --live parameter: %s", opt_arg); | |
722 | ret = CMD_ERROR; | |
723 | goto end; | |
724 | } | |
725 | if (v != (uint32_t) v) { | |
726 | ERR("32-bit overflow in --live parameter: %s", opt_arg); | |
727 | ret = CMD_ERROR; | |
728 | goto end; | |
729 | } | |
0ed9e0be JG |
730 | if (v == 0) { |
731 | ERR("Live timer interval must be greater than zero"); | |
732 | ret = CMD_ERROR; | |
733 | goto end; | |
734 | } | |
ecc48a90 JD |
735 | opt_live_timer = (uint32_t) v; |
736 | DBG("Session live timer interval set to %d", opt_live_timer); | |
737 | break; | |
738 | } | |
f3ed775e DG |
739 | default: |
740 | usage(stderr); | |
741 | ret = CMD_UNDEFINED; | |
742 | goto end; | |
743 | } | |
744 | } | |
745 | ||
785d2d0d | 746 | if (opt_no_consumer) { |
96fe6b8d | 747 | MSG("The option --no-consumer is obsolete. Use --no-output now."); |
785d2d0d DG |
748 | ret = CMD_WARNING; |
749 | goto end; | |
750 | } | |
751 | ||
96ec43a8 JG |
752 | /* Spawn a session daemon if needed */ |
753 | if (!opt_no_sessiond) { | |
754 | ret = launch_sessiond(); | |
755 | if (ret) { | |
756 | ret = CMD_ERROR; | |
757 | goto end; | |
758 | } | |
759 | } | |
760 | ||
acc09215 | 761 | /* MI initialization */ |
37d03ff7 JRJ |
762 | if (lttng_opt_mi) { |
763 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
764 | if (!writer) { | |
765 | ret = -LTTNG_ERR_NOMEM; | |
766 | goto end; | |
767 | } | |
768 | ||
769 | /* Open command element */ | |
770 | ret = mi_lttng_writer_command_open(writer, | |
771 | mi_lttng_element_command_create); | |
772 | if (ret) { | |
773 | ret = CMD_ERROR; | |
774 | goto end; | |
775 | } | |
776 | ||
777 | /* Open output element */ | |
778 | ret = mi_lttng_writer_open_element(writer, | |
779 | mi_lttng_element_command_output); | |
780 | if (ret) { | |
781 | ret = CMD_ERROR; | |
782 | goto end; | |
783 | } | |
784 | } | |
f3ed775e DG |
785 | opt_session_name = (char*) poptGetArg(pc); |
786 | ||
37d03ff7 JRJ |
787 | command_ret = create_session(); |
788 | if (command_ret) { | |
789 | success = 0; | |
790 | } | |
791 | ||
792 | if (lttng_opt_mi) { | |
793 | /* Close output element */ | |
794 | ret = mi_lttng_writer_close_element(writer); | |
795 | if (ret) { | |
796 | ret = CMD_ERROR; | |
797 | goto end; | |
798 | } | |
799 | ||
800 | /* Success ? */ | |
801 | ret = mi_lttng_writer_write_element_bool(writer, | |
802 | mi_lttng_element_command_success, success); | |
803 | if (ret) { | |
804 | ret = CMD_ERROR; | |
805 | goto end; | |
806 | } | |
807 | ||
808 | /* Command element close */ | |
809 | ret = mi_lttng_writer_command_close(writer); | |
810 | if (ret) { | |
811 | ret = CMD_ERROR; | |
812 | goto end; | |
813 | } | |
814 | } | |
f3ed775e DG |
815 | |
816 | end: | |
37d03ff7 JRJ |
817 | /* Mi clean-up */ |
818 | if (writer && mi_lttng_writer_destroy(writer)) { | |
819 | /* Preserve original error code */ | |
820 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
821 | } | |
822 | ||
acc09215 | 823 | /* Overwrite ret if an error occurred in create_session() */ |
37d03ff7 JRJ |
824 | ret = command_ret ? command_ret : ret; |
825 | ||
ca1c3607 | 826 | poptFreeContext(pc); |
f3ed775e DG |
827 | return ret; |
828 | } |