Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
fac6795d DG |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
91d76f53 | 8 | * |
fac6795d DG |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
fac6795d DG |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <fcntl.h> | |
21 | #include <getopt.h> | |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
8c0faa1d | 25 | #include <semaphore.h> |
fac6795d DG |
26 | #include <signal.h> |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
30 | #include <sys/ipc.h> | |
31 | #include <sys/shm.h> | |
32 | #include <sys/socket.h> | |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
35 | #include <unistd.h> | |
36 | ||
37 | #include <urcu/list.h> /* URCU list library (-lurcu) */ | |
38 | #include <ust/ustctl.h> /* UST control lib (-lust) */ | |
5b97ec60 | 39 | #include <lttng/lttng.h> |
fac6795d DG |
40 | |
41 | #include "liblttsessiondcomm.h" | |
42 | #include "ltt-sessiond.h" | |
75462a81 | 43 | #include "lttngerr.h" |
20fe2104 | 44 | #include "kernel-ctl.h" |
9e78d6ae | 45 | #include "ust-ctl.h" |
5b74c7b1 | 46 | #include "session.h" |
91d76f53 | 47 | #include "traceable-app.h" |
5dc18550 | 48 | #include "lttng-kconsumerd.h" |
fac6795d | 49 | |
5e16da05 MD |
50 | /* |
51 | * TODO: | |
52 | * teardown: signal SIGTERM handler -> write into pipe. Threads waits | |
53 | * with epoll on pipe and on other pipes/sockets for commands. Main | |
54 | * simply waits on pthread join. | |
55 | */ | |
56 | ||
75462a81 | 57 | /* Const values */ |
686204ab | 58 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
64a23ac4 | 59 | const char default_tracing_group[] = LTTNG_DEFAULT_TRACING_GROUP; |
686204ab MD |
60 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
61 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
62 | ||
fac6795d | 63 | /* Variables */ |
1d4b027a DG |
64 | int opt_verbose; /* Not static for lttngerr.h */ |
65 | int opt_quiet; /* Not static for lttngerr.h */ | |
fac6795d DG |
66 | const char *progname; |
67 | const char *opt_tracing_group; | |
5b8719f5 | 68 | static int opt_sig_parent; |
fac6795d DG |
69 | static int opt_daemon; |
70 | static int is_root; /* Set to 1 if the daemon is running as root */ | |
1d4b027a DG |
71 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
72 | static pid_t kconsumerd_pid; | |
fac6795d | 73 | |
d6f42150 DG |
74 | static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */ |
75 | static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */ | |
76 | static char kconsumerd_err_unix_sock_path[PATH_MAX]; /* kconsumerd error Unix socket path */ | |
77 | static char kconsumerd_cmd_unix_sock_path[PATH_MAX]; /* kconsumerd command Unix socket path */ | |
fac6795d | 78 | |
1d4b027a | 79 | /* Sockets and FDs */ |
d6f42150 DG |
80 | static int client_sock; |
81 | static int apps_sock; | |
82 | static int kconsumerd_err_sock; | |
8c0faa1d | 83 | static int kconsumerd_cmd_sock; |
20fe2104 | 84 | static int kernel_tracer_fd; |
1d4b027a DG |
85 | |
86 | /* Pthread, Mutexes and Semaphores */ | |
8c0faa1d | 87 | static pthread_t kconsumerd_thread; |
1d4b027a DG |
88 | static pthread_t apps_thread; |
89 | static pthread_t client_thread; | |
8c0faa1d DG |
90 | static sem_t kconsumerd_sem; |
91 | ||
1d4b027a | 92 | static pthread_mutex_t kconsumerd_pid_mutex; /* Mutex to control kconsumerd pid assignation */ |
fac6795d | 93 | |
fac6795d | 94 | /* |
1d4b027a | 95 | * teardown_kernel_session |
fac6795d | 96 | * |
1d4b027a DG |
97 | * Complete teardown of a kernel session. This free all data structure |
98 | * related to a kernel session and update counter. | |
fac6795d | 99 | */ |
1d4b027a | 100 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 101 | { |
1d4b027a DG |
102 | if (session->kernel_session != NULL) { |
103 | DBG("Tearing down kernel session"); | |
c363b55d | 104 | trace_destroy_kernel_session(session->kernel_session); |
1d4b027a DG |
105 | /* Extra precaution */ |
106 | session->kernel_session = NULL; | |
107 | /* Decrement session count */ | |
108 | session->kern_session_count--; | |
fac6795d | 109 | } |
fac6795d DG |
110 | } |
111 | ||
112 | /* | |
1d4b027a | 113 | * cleanup |
fac6795d | 114 | * |
1d4b027a | 115 | * Cleanup the daemon on exit |
fac6795d | 116 | */ |
1d4b027a | 117 | static void cleanup() |
fac6795d | 118 | { |
1d4b027a DG |
119 | int ret; |
120 | char *cmd; | |
121 | struct ltt_session *sess; | |
fac6795d | 122 | |
1d4b027a | 123 | DBG("Cleaning up"); |
e07ae692 | 124 | |
1d4b027a DG |
125 | /* <fun> */ |
126 | MSG("\n%c[%d;%dm*** assert failed *** ==> %c[%dm", 27,1,31,27,0); | |
127 | MSG("%c[%d;%dmMatthew, BEET driven development works!%c[%dm",27,1,33,27,0); | |
128 | /* </fun> */ | |
fac6795d | 129 | |
1d4b027a DG |
130 | /* Stopping all threads */ |
131 | DBG("Terminating all threads"); | |
132 | pthread_cancel(client_thread); | |
133 | pthread_cancel(apps_thread); | |
134 | if (kconsumerd_pid != 0) { | |
135 | pthread_cancel(kconsumerd_thread); | |
5b8719f5 DG |
136 | } |
137 | ||
1d4b027a DG |
138 | DBG("Unlinking all unix socket"); |
139 | unlink(client_unix_sock_path); | |
140 | unlink(apps_unix_sock_path); | |
141 | unlink(kconsumerd_err_unix_sock_path); | |
fac6795d | 142 | |
1d4b027a DG |
143 | DBG("Removing %s directory", LTTNG_RUNDIR); |
144 | ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR); | |
145 | if (ret < 0) { | |
146 | ERR("asprintf failed. Something is really wrong!"); | |
147 | } | |
5461b305 | 148 | |
1d4b027a DG |
149 | /* Remove lttng run directory */ |
150 | ret = system(cmd); | |
151 | if (ret < 0) { | |
152 | ERR("Unable to clean " LTTNG_RUNDIR); | |
153 | } | |
5461b305 | 154 | |
1d4b027a DG |
155 | DBG("Cleaning up all session"); |
156 | /* Cleanup ALL session */ | |
157 | cds_list_for_each_entry(sess, <t_session_list.head, list) { | |
158 | teardown_kernel_session(sess); | |
159 | // TODO complete session cleanup (including UST) | |
fac6795d DG |
160 | } |
161 | ||
1d4b027a | 162 | close(kernel_tracer_fd); |
fac6795d DG |
163 | } |
164 | ||
e065084a DG |
165 | /* |
166 | * send_unix_sock | |
167 | * | |
168 | * Send data on a unix socket using the liblttsessiondcomm API. | |
169 | * | |
170 | * Return lttcomm error code. | |
171 | */ | |
172 | static int send_unix_sock(int sock, void *buf, size_t len) | |
173 | { | |
174 | /* Check valid length */ | |
175 | if (len <= 0) { | |
176 | return -1; | |
177 | } | |
178 | ||
179 | return lttcomm_send_unix_sock(sock, buf, len); | |
180 | } | |
181 | ||
5461b305 DG |
182 | /* |
183 | * clean_command_ctx | |
184 | * | |
185 | * Free memory of a command context structure. | |
186 | */ | |
187 | static void clean_command_ctx(struct command_ctx *cmd_ctx) | |
188 | { | |
189 | DBG("Clean command context structure %p", cmd_ctx); | |
190 | if (cmd_ctx) { | |
191 | if (cmd_ctx->llm) { | |
192 | free(cmd_ctx->llm); | |
193 | } | |
194 | if (cmd_ctx->lsm) { | |
195 | free(cmd_ctx->lsm); | |
196 | } | |
197 | free(cmd_ctx); | |
198 | cmd_ctx = NULL; | |
199 | } | |
200 | } | |
201 | ||
fac6795d | 202 | /* |
471d1693 | 203 | * ust_connect_app |
fac6795d DG |
204 | * |
205 | * Return a socket connected to the libust communication socket | |
206 | * of the application identified by the pid. | |
379473d2 DG |
207 | * |
208 | * If the pid is not found in the traceable list, | |
209 | * return -1 to indicate error. | |
fac6795d | 210 | */ |
471d1693 | 211 | static int ust_connect_app(pid_t pid) |
fac6795d | 212 | { |
91d76f53 DG |
213 | int sock; |
214 | struct ltt_traceable_app *lta; | |
379473d2 | 215 | |
e07ae692 DG |
216 | DBG("Connect to application pid %d", pid); |
217 | ||
91d76f53 DG |
218 | lta = find_app_by_pid(pid); |
219 | if (lta == NULL) { | |
220 | /* App not found */ | |
7442b2ba | 221 | DBG("Application pid %d not found", pid); |
379473d2 DG |
222 | return -1; |
223 | } | |
fac6795d | 224 | |
91d76f53 | 225 | sock = ustctl_connect_pid(lta->pid); |
fac6795d | 226 | if (sock < 0) { |
75462a81 | 227 | ERR("Fail connecting to the PID %d\n", pid); |
fac6795d DG |
228 | } |
229 | ||
230 | return sock; | |
231 | } | |
232 | ||
233 | /* | |
234 | * notify_apps | |
235 | * | |
236 | * Notify apps by writing 42 to a named pipe using name. | |
237 | * Every applications waiting for a ltt-sessiond will be notified | |
238 | * and re-register automatically to the session daemon. | |
239 | * | |
240 | * Return open or write error value. | |
241 | */ | |
242 | static int notify_apps(const char *name) | |
243 | { | |
244 | int fd; | |
245 | int ret = -1; | |
246 | ||
e07ae692 DG |
247 | DBG("Notify the global application pipe"); |
248 | ||
fac6795d DG |
249 | /* Try opening the global pipe */ |
250 | fd = open(name, O_WRONLY); | |
251 | if (fd < 0) { | |
252 | goto error; | |
253 | } | |
254 | ||
255 | /* Notify by writing on the pipe */ | |
256 | ret = write(fd, "42", 2); | |
257 | if (ret < 0) { | |
258 | perror("write"); | |
259 | } | |
260 | ||
261 | error: | |
262 | return ret; | |
263 | } | |
264 | ||
e065084a | 265 | /* |
5461b305 | 266 | * setup_lttng_msg |
ca95a216 | 267 | * |
5461b305 DG |
268 | * Setup the outgoing data buffer for the response (llm) by allocating the |
269 | * right amount of memory and copying the original information from the lsm | |
270 | * structure. | |
ca95a216 DG |
271 | * |
272 | * Return total size of the buffer pointed by buf. | |
273 | */ | |
5461b305 | 274 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 275 | { |
5461b305 | 276 | int ret, buf_size, trace_name_size; |
ca95a216 | 277 | |
5461b305 DG |
278 | /* |
279 | * Check for the trace_name. If defined, it's part of the payload data of | |
280 | * the llm structure. | |
281 | */ | |
282 | trace_name_size = strlen(cmd_ctx->lsm->trace_name); | |
283 | buf_size = trace_name_size + size; | |
284 | ||
285 | cmd_ctx->llm = malloc(sizeof(struct lttcomm_lttng_msg) + buf_size); | |
286 | if (cmd_ctx->llm == NULL) { | |
ca95a216 | 287 | perror("malloc"); |
5461b305 | 288 | ret = -ENOMEM; |
ca95a216 DG |
289 | goto error; |
290 | } | |
291 | ||
5461b305 DG |
292 | /* Copy common data */ |
293 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
294 | cmd_ctx->llm->pid = cmd_ctx->lsm->pid; | |
295 | if (!uuid_is_null(cmd_ctx->lsm->session_uuid)) { | |
296 | uuid_copy(cmd_ctx->llm->session_uuid, cmd_ctx->lsm->session_uuid); | |
297 | } | |
298 | ||
299 | cmd_ctx->llm->trace_name_offset = trace_name_size; | |
300 | cmd_ctx->llm->data_size = size; | |
301 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
302 | ||
303 | /* Copy trace name to the llm structure. Begining of the payload. */ | |
304 | memcpy(cmd_ctx->llm->payload, cmd_ctx->lsm->trace_name, trace_name_size); | |
ca95a216 DG |
305 | |
306 | return buf_size; | |
307 | ||
308 | error: | |
309 | return ret; | |
310 | } | |
311 | ||
1d4b027a DG |
312 | /* |
313 | * thread_manage_kconsumerd | |
314 | * | |
315 | * This thread manage the kconsumerd error sent | |
316 | * back to the session daemon. | |
317 | */ | |
318 | static void *thread_manage_kconsumerd(void *data) | |
319 | { | |
320 | int sock, ret; | |
321 | enum lttcomm_return_code code; | |
322 | ||
323 | DBG("[thread] Manage kconsumerd started"); | |
324 | ||
325 | ret = lttcomm_listen_unix_sock(kconsumerd_err_sock); | |
326 | if (ret < 0) { | |
327 | goto error; | |
328 | } | |
329 | ||
330 | sock = lttcomm_accept_unix_sock(kconsumerd_err_sock); | |
331 | if (sock < 0) { | |
332 | goto error; | |
333 | } | |
334 | ||
712ea556 | 335 | /* Getting status code from kconsumerd */ |
1d4b027a DG |
336 | ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code)); |
337 | if (ret <= 0) { | |
338 | goto error; | |
339 | } | |
340 | ||
341 | if (code == KCONSUMERD_COMMAND_SOCK_READY) { | |
342 | kconsumerd_cmd_sock = lttcomm_connect_unix_sock(kconsumerd_cmd_unix_sock_path); | |
343 | if (kconsumerd_cmd_sock < 0) { | |
712ea556 | 344 | sem_post(&kconsumerd_sem); |
1d4b027a DG |
345 | perror("kconsumerd connect"); |
346 | goto error; | |
347 | } | |
348 | /* Signal condition to tell that the kconsumerd is ready */ | |
349 | sem_post(&kconsumerd_sem); | |
350 | DBG("Kconsumerd command socket ready"); | |
351 | } else { | |
6f61d021 | 352 | DBG("Kconsumerd error when waiting for SOCK_READY : %s", |
1d4b027a DG |
353 | lttcomm_get_readable_code(-code)); |
354 | goto error; | |
355 | } | |
356 | ||
712ea556 DG |
357 | /* Wait for any kconsumerd error */ |
358 | ret = lttcomm_recv_unix_sock(sock, &code, sizeof(enum lttcomm_return_code)); | |
359 | if (ret <= 0) { | |
360 | ERR("Kconsumerd closed the command socket"); | |
361 | goto error; | |
6f61d021 | 362 | } |
1d4b027a | 363 | |
712ea556 DG |
364 | ERR("Kconsumerd return code : %s", lttcomm_get_readable_code(-code)); |
365 | ||
1d4b027a DG |
366 | error: |
367 | kconsumerd_pid = 0; | |
6f61d021 | 368 | DBG("Kconsumerd thread dying"); |
1d4b027a DG |
369 | return NULL; |
370 | } | |
371 | ||
372 | /* | |
373 | * thread_manage_apps | |
374 | * | |
375 | * This thread manage the application socket communication | |
376 | */ | |
377 | static void *thread_manage_apps(void *data) | |
378 | { | |
379 | int sock, ret; | |
380 | ||
381 | /* TODO: Something more elegant is needed but fine for now */ | |
382 | /* FIXME: change all types to either uint8_t, uint32_t, uint64_t | |
383 | * for 32-bit vs 64-bit compat processes. */ | |
384 | /* replicate in ust with version number */ | |
385 | struct { | |
386 | int reg; /* 1:register, 0:unregister */ | |
387 | pid_t pid; | |
388 | uid_t uid; | |
389 | } reg_msg; | |
390 | ||
391 | DBG("[thread] Manage apps started"); | |
392 | ||
393 | ret = lttcomm_listen_unix_sock(apps_sock); | |
394 | if (ret < 0) { | |
395 | goto error; | |
396 | } | |
397 | ||
398 | /* Notify all applications to register */ | |
399 | notify_apps(default_global_apps_pipe); | |
400 | ||
401 | while (1) { | |
402 | DBG("Accepting application registration"); | |
403 | /* Blocking call, waiting for transmission */ | |
404 | sock = lttcomm_accept_unix_sock(apps_sock); | |
405 | if (sock < 0) { | |
406 | goto error; | |
407 | } | |
408 | ||
409 | /* Basic recv here to handle the very simple data | |
410 | * that the libust send to register (reg_msg). | |
411 | */ | |
412 | ret = recv(sock, ®_msg, sizeof(reg_msg), 0); | |
413 | if (ret < 0) { | |
414 | perror("recv"); | |
415 | continue; | |
416 | } | |
417 | ||
418 | /* Add application to the global traceable list */ | |
419 | if (reg_msg.reg == 1) { | |
420 | /* Registering */ | |
421 | ret = register_traceable_app(reg_msg.pid, reg_msg.uid); | |
422 | if (ret < 0) { | |
423 | /* register_traceable_app only return an error with | |
424 | * ENOMEM. At this point, we better stop everything. | |
425 | */ | |
426 | goto error; | |
427 | } | |
428 | } else { | |
429 | /* Unregistering */ | |
430 | unregister_traceable_app(reg_msg.pid); | |
431 | } | |
432 | } | |
433 | ||
434 | error: | |
435 | ||
436 | return NULL; | |
437 | } | |
438 | ||
8c0faa1d | 439 | /* |
693bd40b | 440 | * spawn_kconsumerd_thread |
8c0faa1d DG |
441 | * |
442 | * Start the thread_manage_kconsumerd. This must be done after a kconsumerd | |
443 | * exec or it will fails. | |
444 | */ | |
693bd40b | 445 | static int spawn_kconsumerd_thread(void) |
8c0faa1d DG |
446 | { |
447 | int ret; | |
448 | ||
449 | /* Setup semaphore */ | |
450 | sem_init(&kconsumerd_sem, 0, 0); | |
451 | ||
1d4b027a | 452 | ret = pthread_create(&kconsumerd_thread, NULL, thread_manage_kconsumerd, (void *) NULL); |
8c0faa1d DG |
453 | if (ret != 0) { |
454 | perror("pthread_create kconsumerd"); | |
455 | goto error; | |
456 | } | |
457 | ||
693bd40b | 458 | /* Wait for the kconsumerd thread to be ready */ |
8c0faa1d DG |
459 | sem_wait(&kconsumerd_sem); |
460 | ||
712ea556 DG |
461 | if (kconsumerd_pid == 0) { |
462 | ERR("Kconsumerd did not start"); | |
463 | goto error; | |
464 | } | |
465 | ||
8c0faa1d DG |
466 | return 0; |
467 | ||
468 | error: | |
712ea556 | 469 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
8c0faa1d DG |
470 | return ret; |
471 | } | |
472 | ||
473 | /* | |
693bd40b | 474 | * spawn_kconsumerd |
8c0faa1d | 475 | * |
693bd40b DG |
476 | * Fork and exec a kernel consumer daemon (kconsumerd). |
477 | * | |
478 | * NOTE: It is very important to fork a kconsumerd BEFORE opening any kernel | |
479 | * file descriptor using the libkernelctl or kernel-ctl functions. So, a | |
480 | * kernel consumer MUST only be spawned before creating a kernel session. | |
8c0faa1d DG |
481 | * |
482 | * Return pid if successful else -1. | |
483 | */ | |
693bd40b | 484 | static pid_t spawn_kconsumerd(void) |
8c0faa1d DG |
485 | { |
486 | int ret; | |
487 | pid_t pid; | |
488 | ||
c49dc785 DG |
489 | DBG("Spawning kconsumerd"); |
490 | ||
8c0faa1d DG |
491 | pid = fork(); |
492 | if (pid == 0) { | |
493 | /* | |
494 | * Exec kconsumerd. | |
495 | */ | |
e7d10b09 | 496 | execlp("kconsumerd", "kconsumerd", "--quiet", NULL); |
8c0faa1d DG |
497 | if (errno != 0) { |
498 | perror("kernel start consumer exec"); | |
499 | } | |
500 | exit(EXIT_FAILURE); | |
501 | } else if (pid > 0) { | |
502 | ret = pid; | |
503 | goto error; | |
504 | } else { | |
505 | perror("kernel start consumer fork"); | |
506 | ret = -errno; | |
507 | goto error; | |
508 | } | |
509 | ||
510 | error: | |
511 | return ret; | |
512 | } | |
513 | ||
693bd40b DG |
514 | /* |
515 | * start_kconsumerd | |
516 | * | |
517 | * Spawn the kconsumerd daemon and session daemon thread. | |
518 | */ | |
519 | static int start_kconsumerd(void) | |
520 | { | |
521 | int ret; | |
522 | ||
693bd40b | 523 | pthread_mutex_lock(&kconsumerd_pid_mutex); |
c49dc785 DG |
524 | if (kconsumerd_pid != 0) { |
525 | goto end; | |
526 | } | |
693bd40b | 527 | |
c49dc785 DG |
528 | ret = spawn_kconsumerd(); |
529 | if (ret < 0) { | |
530 | ERR("Spawning kconsumerd failed"); | |
531 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
532 | pthread_mutex_unlock(&kconsumerd_pid_mutex); | |
533 | goto error; | |
693bd40b | 534 | } |
c49dc785 DG |
535 | |
536 | /* Setting up the global kconsumerd_pid */ | |
537 | kconsumerd_pid = ret; | |
693bd40b DG |
538 | pthread_mutex_unlock(&kconsumerd_pid_mutex); |
539 | ||
6f61d021 DG |
540 | DBG("Kconsumerd pid %d", ret); |
541 | ||
693bd40b | 542 | DBG("Spawning kconsumerd thread"); |
693bd40b DG |
543 | ret = spawn_kconsumerd_thread(); |
544 | if (ret < 0) { | |
545 | ERR("Fatal error spawning kconsumerd thread"); | |
693bd40b DG |
546 | goto error; |
547 | } | |
548 | ||
c49dc785 DG |
549 | end: |
550 | pthread_mutex_unlock(&kconsumerd_pid_mutex); | |
693bd40b DG |
551 | return 0; |
552 | ||
553 | error: | |
554 | return ret; | |
555 | } | |
556 | ||
8c0faa1d DG |
557 | /* |
558 | * send_kconsumerd_fds | |
559 | * | |
560 | * Send all stream fds of the kernel session to the consumer. | |
561 | */ | |
562 | static int send_kconsumerd_fds(int sock, struct ltt_kernel_session *session) | |
563 | { | |
33a2b854 DG |
564 | int ret; |
565 | size_t nb_fd; | |
8c0faa1d DG |
566 | struct ltt_kernel_stream *stream; |
567 | struct ltt_kernel_channel *chan; | |
568 | struct lttcomm_kconsumerd_header lkh; | |
33a2b854 | 569 | struct lttcomm_kconsumerd_msg lkm; |
8c0faa1d | 570 | |
33a2b854 | 571 | nb_fd = session->stream_count_global; |
8c0faa1d DG |
572 | |
573 | /* Setup header */ | |
33a2b854 | 574 | lkh.payload_size = (nb_fd + 1) * sizeof(struct lttcomm_kconsumerd_msg); |
5dc18550 | 575 | lkh.cmd_type = ADD_STREAM; |
8c0faa1d DG |
576 | |
577 | DBG("Sending kconsumerd header"); | |
1d4b027a DG |
578 | |
579 | ret = lttcomm_send_unix_sock(sock, &lkh, sizeof(struct lttcomm_kconsumerd_header)); | |
580 | if (ret < 0) { | |
581 | perror("send kconsumerd header"); | |
582 | goto error; | |
8c0faa1d DG |
583 | } |
584 | ||
33a2b854 DG |
585 | DBG("Sending metadata stream fd"); |
586 | ||
587 | /* Send metadata stream fd first */ | |
588 | lkm.fd = session->metadata_stream_fd; | |
589 | lkm.state = ACTIVE_FD; | |
590 | lkm.max_sb_size = session->metadata->conf->subbuf_size; | |
591 | strncpy(lkm.path_name, session->metadata->pathname, PATH_MAX); | |
8c0faa1d | 592 | |
33a2b854 | 593 | ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm)); |
1d4b027a | 594 | if (ret < 0) { |
33a2b854 | 595 | perror("send kconsumerd fd"); |
1d4b027a DG |
596 | goto error; |
597 | } | |
598 | ||
33a2b854 DG |
599 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
600 | cds_list_for_each_entry(stream, &chan->stream_list.head, list) { | |
601 | lkm.fd = stream->fd; | |
602 | lkm.state = stream->state; | |
603 | lkm.max_sb_size = chan->channel->subbuf_size; | |
604 | strncpy(lkm.path_name, stream->pathname, PATH_MAX); | |
605 | ||
606 | DBG("Sending fd %d to kconsumerd", lkm.fd); | |
607 | ||
608 | ret = lttcomm_send_fds_unix_sock(sock, &lkm, &lkm.fd, 1, sizeof(lkm)); | |
609 | if (ret < 0) { | |
610 | perror("send kconsumerd fd"); | |
611 | goto error; | |
612 | } | |
613 | } | |
614 | } | |
615 | ||
1d4b027a DG |
616 | DBG("Kconsumerd fds sent"); |
617 | ||
618 | return 0; | |
619 | ||
620 | error: | |
621 | return ret; | |
8c0faa1d DG |
622 | } |
623 | ||
624 | /* | |
1d4b027a | 625 | * create_trace_dir |
8c0faa1d | 626 | * |
1d4b027a | 627 | * Create the trace output directory. |
8c0faa1d | 628 | */ |
1d4b027a | 629 | static int create_trace_dir(struct ltt_kernel_session *session) |
8c0faa1d | 630 | { |
1d4b027a DG |
631 | int ret; |
632 | struct ltt_kernel_channel *chan; | |
633 | ||
634 | /* Create all channel directories */ | |
635 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { | |
1b6083d9 | 636 | DBG("Creating trace directory at %s", chan->pathname); |
1d4b027a DG |
637 | ret = mkdir(chan->pathname, S_IRWXU | S_IRWXG ); |
638 | if (ret < 0) { | |
639 | perror("mkdir trace path"); | |
640 | ret = -errno; | |
641 | goto error; | |
642 | } | |
8c0faa1d | 643 | } |
1d4b027a DG |
644 | |
645 | return 0; | |
646 | ||
647 | error: | |
648 | return ret; | |
8c0faa1d DG |
649 | } |
650 | ||
fac6795d DG |
651 | /* |
652 | * process_client_msg | |
653 | * | |
5461b305 DG |
654 | * Process the command requested by the lttng client within the command |
655 | * context structure. This function make sure that the return structure (llm) | |
656 | * is set and ready for transmission before returning. | |
fac6795d | 657 | * |
e065084a | 658 | * Return any error encountered or 0 for success. |
fac6795d | 659 | */ |
5461b305 | 660 | static int process_client_msg(struct command_ctx *cmd_ctx) |
fac6795d | 661 | { |
5461b305 | 662 | int ret; |
fac6795d | 663 | |
5461b305 | 664 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); |
fac6795d | 665 | |
379473d2 | 666 | /* Check command that needs a session */ |
5461b305 | 667 | switch (cmd_ctx->lsm->cmd_type) { |
5e16da05 MD |
668 | case LTTNG_CREATE_SESSION: |
669 | case LTTNG_LIST_SESSIONS: | |
2ef84c95 | 670 | case KERNEL_LIST_EVENTS: |
5e16da05 MD |
671 | case UST_LIST_APPS: |
672 | break; | |
673 | default: | |
5461b305 DG |
674 | cmd_ctx->session = find_session_by_uuid(cmd_ctx->lsm->session_uuid); |
675 | if (cmd_ctx->session == NULL) { | |
379473d2 | 676 | ret = LTTCOMM_SELECT_SESS; |
5461b305 | 677 | goto error; |
379473d2 | 678 | } |
5e16da05 | 679 | break; |
379473d2 DG |
680 | } |
681 | ||
20fe2104 DG |
682 | /* Check command for kernel tracing */ |
683 | switch (cmd_ctx->lsm->cmd_type) { | |
684 | case KERNEL_CREATE_SESSION: | |
685 | case KERNEL_CREATE_CHANNEL: | |
8c0faa1d | 686 | case KERNEL_CREATE_STREAM: |
aaf26714 DG |
687 | case KERNEL_DISABLE_EVENT: |
688 | case KERNEL_ENABLE_EVENT: | |
2ef84c95 | 689 | case KERNEL_LIST_EVENTS: |
aaf26714 DG |
690 | case KERNEL_OPEN_METADATA: |
691 | case KERNEL_START_TRACE: | |
692 | case KERNEL_STOP_TRACE: | |
693 | /* TODO: reconnect to kernel tracer to check if | |
694 | * it's loadded */ | |
20fe2104 DG |
695 | if (kernel_tracer_fd == 0) { |
696 | ret = LTTCOMM_KERN_NA; | |
697 | goto error; | |
698 | } | |
699 | break; | |
700 | } | |
701 | ||
471d1693 | 702 | /* Connect to ust apps if available pid */ |
5461b305 | 703 | if (cmd_ctx->lsm->pid > 0) { |
471d1693 | 704 | /* Connect to app using ustctl API */ |
5461b305 DG |
705 | cmd_ctx->ust_sock = ust_connect_app(cmd_ctx->lsm->pid); |
706 | if (cmd_ctx->ust_sock < 0) { | |
471d1693 | 707 | ret = LTTCOMM_NO_TRACEABLE; |
5461b305 | 708 | goto error; |
471d1693 DG |
709 | } |
710 | } | |
711 | ||
fac6795d | 712 | /* Process by command type */ |
5461b305 | 713 | switch (cmd_ctx->lsm->cmd_type) { |
20fe2104 DG |
714 | case KERNEL_CREATE_SESSION: |
715 | { | |
716 | ret = setup_lttng_msg(cmd_ctx, 0); | |
717 | if (ret < 0) { | |
718 | goto setup_error; | |
719 | } | |
720 | ||
693bd40b | 721 | ret = start_kconsumerd(); |
8c0faa1d | 722 | if (ret < 0) { |
8c0faa1d DG |
723 | goto error; |
724 | } | |
725 | ||
20fe2104 DG |
726 | DBG("Creating kernel session"); |
727 | ||
8c0faa1d | 728 | ret = kernel_create_session(cmd_ctx->session, kernel_tracer_fd); |
20fe2104 DG |
729 | if (ret < 0) { |
730 | ret = LTTCOMM_KERN_SESS_FAIL; | |
731 | goto error; | |
732 | } | |
733 | ||
734 | ret = LTTCOMM_OK; | |
735 | break; | |
736 | } | |
737 | case KERNEL_CREATE_CHANNEL: | |
738 | { | |
739 | ret = setup_lttng_msg(cmd_ctx, 0); | |
740 | if (ret < 0) { | |
741 | goto setup_error; | |
742 | } | |
743 | ||
8c0faa1d DG |
744 | DBG("Creating kernel channel"); |
745 | ||
746 | ret = kernel_create_channel(cmd_ctx->session->kernel_session); | |
20fe2104 | 747 | |
20fe2104 DG |
748 | if (ret < 0) { |
749 | ret = LTTCOMM_KERN_CHAN_FAIL; | |
750 | goto error; | |
751 | } | |
752 | ||
753 | ret = LTTCOMM_OK; | |
754 | break; | |
755 | } | |
894be886 DG |
756 | case KERNEL_ENABLE_EVENT: |
757 | { | |
758 | /* Setup lttng message with no payload */ | |
759 | ret = setup_lttng_msg(cmd_ctx, 0); | |
760 | if (ret < 0) { | |
761 | goto setup_error; | |
762 | } | |
763 | ||
764 | DBG("Enabling kernel event %s", cmd_ctx->lsm->u.event.event_name); | |
765 | ||
8c0faa1d | 766 | ret = kernel_enable_event(cmd_ctx->session->kernel_session, cmd_ctx->lsm->u.event.event_name); |
f34daff7 DG |
767 | if (ret < 0) { |
768 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
769 | goto error; | |
770 | } | |
771 | ||
894be886 DG |
772 | ret = LTTCOMM_OK; |
773 | break; | |
774 | } | |
33a2b854 DG |
775 | case KERNEL_ENABLE_ALL_EVENT: |
776 | { | |
777 | int pos, size; | |
778 | char *event_list, *event, *ptr; | |
779 | ||
780 | /* Setup lttng message with no payload */ | |
781 | ret = setup_lttng_msg(cmd_ctx, 0); | |
782 | if (ret < 0) { | |
783 | goto setup_error; | |
784 | } | |
785 | ||
786 | DBG("Enabling all kernel event"); | |
787 | ||
788 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
789 | if (size < 0) { | |
790 | ret = LTTCOMM_KERN_LIST_FAIL; | |
791 | goto error; | |
792 | } | |
793 | ||
794 | ptr = event_list; | |
795 | while ((size = sscanf(ptr, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) { | |
796 | /* Enable each single event */ | |
797 | ret = kernel_enable_event(cmd_ctx->session->kernel_session, event); | |
798 | if (ret < 0) { | |
799 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
800 | goto error; | |
801 | } | |
802 | /* Move pointer to the next line */ | |
803 | ptr += pos + 1; | |
804 | free(event); | |
805 | } | |
806 | ||
807 | free(event_list); | |
808 | ||
809 | ret = LTTCOMM_OK; | |
810 | break; | |
811 | } | |
2ef84c95 DG |
812 | case KERNEL_LIST_EVENTS: |
813 | { | |
814 | char *event_list; | |
815 | ssize_t size; | |
816 | ||
817 | size = kernel_list_events(kernel_tracer_fd, &event_list); | |
818 | if (size < 0) { | |
819 | ret = LTTCOMM_KERN_LIST_FAIL; | |
820 | goto error; | |
821 | } | |
822 | ||
823 | /* | |
824 | * Setup lttng message with payload size set to the event list size in | |
825 | * bytes and then copy list into the llm payload. | |
826 | */ | |
827 | ret = setup_lttng_msg(cmd_ctx, size); | |
828 | if (ret < 0) { | |
829 | goto setup_error; | |
830 | } | |
831 | ||
832 | /* Copy event list into message payload */ | |
833 | memcpy(cmd_ctx->llm->payload, event_list, size); | |
834 | ||
835 | free(event_list); | |
836 | ||
837 | ret = LTTCOMM_OK; | |
838 | break; | |
839 | } | |
aaf26714 DG |
840 | case KERNEL_OPEN_METADATA: |
841 | { | |
842 | /* Setup lttng message with no payload */ | |
843 | ret = setup_lttng_msg(cmd_ctx, 0); | |
844 | if (ret < 0) { | |
845 | goto setup_error; | |
846 | } | |
847 | ||
848 | DBG("Open kernel metadata"); | |
849 | ||
850 | ret = kernel_open_metadata(cmd_ctx->session->kernel_session); | |
851 | if (ret < 0) { | |
852 | ret = LTTCOMM_KERN_META_FAIL; | |
853 | goto error; | |
854 | } | |
855 | ||
856 | ret = LTTCOMM_OK; | |
857 | break; | |
858 | } | |
8c0faa1d DG |
859 | case KERNEL_CREATE_STREAM: |
860 | { | |
861 | struct ltt_kernel_channel *chan; | |
862 | /* Setup lttng message with no payload */ | |
863 | ret = setup_lttng_msg(cmd_ctx, 0); | |
864 | if (ret < 0) { | |
865 | goto setup_error; | |
866 | } | |
867 | ||
868 | DBG("Creating kernel stream"); | |
869 | ||
870 | ret = kernel_create_metadata_stream(cmd_ctx->session->kernel_session); | |
871 | if (ret < 0) { | |
872 | ERR("Kernel create metadata stream failed"); | |
873 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
874 | goto error; | |
875 | } | |
876 | ||
877 | /* For each channel */ | |
878 | cds_list_for_each_entry(chan, &cmd_ctx->session->kernel_session->channel_list.head, list) { | |
879 | ret = kernel_create_channel_stream(chan); | |
880 | if (ret < 0) { | |
881 | ERR("Kernel create channel stream failed"); | |
882 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
883 | goto error; | |
884 | } | |
885 | /* Update the stream global counter */ | |
886 | cmd_ctx->session->kernel_session->stream_count_global += ret; | |
887 | } | |
888 | ||
889 | ret = LTTCOMM_OK; | |
890 | break; | |
891 | } | |
892 | case KERNEL_START_TRACE: | |
893 | { | |
894 | /* Setup lttng message with no payload */ | |
895 | ret = setup_lttng_msg(cmd_ctx, 0); | |
896 | if (ret < 0) { | |
897 | goto setup_error; | |
898 | } | |
899 | ||
900 | DBG("Start kernel tracing"); | |
901 | ||
902 | ret = create_trace_dir(cmd_ctx->session->kernel_session); | |
903 | if (ret < 0) { | |
904 | if (ret == -EEXIST) { | |
905 | ret = LTTCOMM_KERN_DIR_EXIST; | |
906 | } else { | |
907 | ret = LTTCOMM_KERN_DIR_FAIL; | |
908 | goto error; | |
909 | } | |
910 | } | |
911 | ||
912 | ret = kernel_start_session(cmd_ctx->session->kernel_session); | |
913 | if (ret < 0) { | |
914 | ERR("Kernel start session failed"); | |
915 | ret = LTTCOMM_KERN_START_FAIL; | |
916 | goto error; | |
917 | } | |
918 | ||
919 | ret = send_kconsumerd_fds(kconsumerd_cmd_sock, cmd_ctx->session->kernel_session); | |
920 | if (ret < 0) { | |
921 | ERR("Send kconsumerd fds failed"); | |
922 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
923 | goto error; | |
924 | } | |
925 | ||
926 | ret = LTTCOMM_OK; | |
927 | break; | |
928 | } | |
929 | case KERNEL_STOP_TRACE: | |
930 | { | |
931 | /* Setup lttng message with no payload */ | |
932 | ret = setup_lttng_msg(cmd_ctx, 0); | |
933 | if (ret < 0) { | |
934 | goto setup_error; | |
935 | } | |
936 | ||
84291629 DG |
937 | if (cmd_ctx->session->kernel_session == NULL) { |
938 | ret = LTTCOMM_KERN_NO_SESSION; | |
939 | goto error; | |
940 | } | |
941 | ||
8c0faa1d DG |
942 | DBG("Stop kernel tracing"); |
943 | ||
944 | ret = kernel_stop_session(cmd_ctx->session->kernel_session); | |
945 | if (ret < 0) { | |
946 | ERR("Kernel stop session failed"); | |
947 | ret = LTTCOMM_KERN_STOP_FAIL; | |
948 | goto error; | |
949 | } | |
950 | ||
951 | /* Clean kernel session teardown */ | |
952 | teardown_kernel_session(cmd_ctx->session); | |
953 | ||
954 | ret = LTTCOMM_OK; | |
955 | break; | |
956 | } | |
5e16da05 MD |
957 | case LTTNG_CREATE_SESSION: |
958 | { | |
5461b305 DG |
959 | /* Setup lttng message with no payload */ |
960 | ret = setup_lttng_msg(cmd_ctx, 0); | |
961 | if (ret < 0) { | |
962 | goto setup_error; | |
963 | } | |
964 | ||
965 | ret = create_session(cmd_ctx->lsm->session_name, &cmd_ctx->llm->session_uuid); | |
5e16da05 MD |
966 | if (ret < 0) { |
967 | if (ret == -1) { | |
968 | ret = LTTCOMM_EXIST_SESS; | |
969 | } else { | |
aaf97519 | 970 | ret = LTTCOMM_FATAL; |
aaf97519 | 971 | } |
5461b305 | 972 | goto error; |
8028d920 | 973 | } |
1657e9bb | 974 | |
5461b305 | 975 | ret = LTTCOMM_OK; |
5e16da05 MD |
976 | break; |
977 | } | |
978 | case LTTNG_DESTROY_SESSION: | |
979 | { | |
5461b305 DG |
980 | /* Setup lttng message with no payload */ |
981 | ret = setup_lttng_msg(cmd_ctx, 0); | |
982 | if (ret < 0) { | |
983 | goto setup_error; | |
984 | } | |
985 | ||
986 | ret = destroy_session(&cmd_ctx->lsm->session_uuid); | |
5e16da05 MD |
987 | if (ret < 0) { |
988 | ret = LTTCOMM_NO_SESS; | |
5461b305 | 989 | goto error; |
5e16da05 | 990 | } |
1657e9bb | 991 | |
5461b305 DG |
992 | ret = LTTCOMM_OK; |
993 | break; | |
5e16da05 MD |
994 | } |
995 | case LTTNG_LIST_TRACES: | |
996 | { | |
5461b305 | 997 | unsigned int trace_count; |
1657e9bb | 998 | |
5461b305 | 999 | trace_count = get_trace_count_per_session(cmd_ctx->session); |
5e16da05 MD |
1000 | if (trace_count == 0) { |
1001 | ret = LTTCOMM_NO_TRACE; | |
5461b305 | 1002 | goto error; |
1657e9bb | 1003 | } |
df0da139 | 1004 | |
5461b305 DG |
1005 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_trace) * trace_count); |
1006 | if (ret < 0) { | |
1007 | goto setup_error; | |
df0da139 | 1008 | } |
ca95a216 | 1009 | |
5461b305 DG |
1010 | get_traces_per_session(cmd_ctx->session, |
1011 | (struct lttng_trace *)(cmd_ctx->llm->payload)); | |
1012 | ||
1013 | ret = LTTCOMM_OK; | |
5e16da05 MD |
1014 | break; |
1015 | } | |
1016 | case UST_CREATE_TRACE: | |
1017 | { | |
5461b305 DG |
1018 | /* Setup lttng message with no payload */ |
1019 | ret = setup_lttng_msg(cmd_ctx, 0); | |
5e16da05 | 1020 | if (ret < 0) { |
5461b305 | 1021 | goto setup_error; |
fac6795d | 1022 | } |
ce3d728c | 1023 | |
5461b305 DG |
1024 | ret = ust_create_trace(cmd_ctx); |
1025 | if (ret < 0) { | |
1026 | goto setup_error; | |
1027 | } | |
1028 | break; | |
5e16da05 MD |
1029 | } |
1030 | case UST_LIST_APPS: | |
1031 | { | |
5461b305 DG |
1032 | unsigned int app_count; |
1033 | ||
1034 | app_count = get_app_count(); | |
1035 | DBG("Traceable application count : %d", app_count); | |
5e16da05 MD |
1036 | if (app_count == 0) { |
1037 | ret = LTTCOMM_NO_APPS; | |
5461b305 | 1038 | goto error; |
ce3d728c | 1039 | } |
520ff687 | 1040 | |
5461b305 DG |
1041 | ret = setup_lttng_msg(cmd_ctx, sizeof(pid_t) * app_count); |
1042 | if (ret < 0) { | |
1043 | goto setup_error; | |
520ff687 | 1044 | } |
57167058 | 1045 | |
5461b305 | 1046 | get_app_list_pids((pid_t *)(cmd_ctx->llm->payload)); |
5e16da05 | 1047 | |
5461b305 | 1048 | ret = LTTCOMM_OK; |
5e16da05 MD |
1049 | break; |
1050 | } | |
1051 | case UST_START_TRACE: | |
1052 | { | |
5461b305 DG |
1053 | /* Setup lttng message with no payload */ |
1054 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1055 | if (ret < 0) { | |
1056 | goto setup_error; | |
1057 | } | |
ca95a216 | 1058 | |
5461b305 DG |
1059 | ret = ust_start_trace(cmd_ctx); |
1060 | if (ret < 0) { | |
1061 | goto setup_error; | |
1062 | } | |
1063 | break; | |
5e16da05 MD |
1064 | } |
1065 | case UST_STOP_TRACE: | |
1066 | { | |
5461b305 DG |
1067 | /* Setup lttng message with no payload */ |
1068 | ret = setup_lttng_msg(cmd_ctx, 0); | |
1069 | if (ret < 0) { | |
1070 | goto setup_error; | |
1071 | } | |
ca95a216 | 1072 | |
5461b305 DG |
1073 | ret = ust_stop_trace(cmd_ctx); |
1074 | if (ret < 0) { | |
1075 | goto setup_error; | |
1076 | } | |
1077 | break; | |
5e16da05 MD |
1078 | } |
1079 | case LTTNG_LIST_SESSIONS: | |
1080 | { | |
5461b305 DG |
1081 | unsigned int session_count; |
1082 | ||
1083 | session_count = get_session_count(); | |
5e16da05 MD |
1084 | if (session_count == 0) { |
1085 | ret = LTTCOMM_NO_SESS; | |
5461b305 | 1086 | goto error; |
57167058 | 1087 | } |
5e16da05 | 1088 | |
5461b305 DG |
1089 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * session_count); |
1090 | if (ret < 0) { | |
1091 | goto setup_error; | |
e065084a | 1092 | } |
5e16da05 | 1093 | |
5461b305 | 1094 | get_lttng_session((struct lttng_session *)(cmd_ctx->llm->payload)); |
5e16da05 | 1095 | |
5461b305 | 1096 | ret = LTTCOMM_OK; |
5e16da05 MD |
1097 | break; |
1098 | } | |
1099 | default: | |
1100 | /* Undefined command */ | |
5461b305 DG |
1101 | ret = setup_lttng_msg(cmd_ctx, 0); |
1102 | if (ret < 0) { | |
1103 | goto setup_error; | |
1104 | } | |
1105 | ||
5e16da05 | 1106 | ret = LTTCOMM_UND; |
5461b305 | 1107 | break; |
fac6795d DG |
1108 | } |
1109 | ||
5461b305 DG |
1110 | /* Set return code */ |
1111 | cmd_ctx->llm->ret_code = ret; | |
ca95a216 | 1112 | |
e065084a DG |
1113 | return ret; |
1114 | ||
5461b305 | 1115 | error: |
5461b305 DG |
1116 | if (cmd_ctx->llm == NULL) { |
1117 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 1118 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
1119 | goto setup_error; |
1120 | } | |
1121 | } | |
e065084a | 1122 | /* Notify client of error */ |
5461b305 | 1123 | cmd_ctx->llm->ret_code = ret; |
e065084a | 1124 | |
5461b305 | 1125 | setup_error: |
8028d920 | 1126 | return ret; |
fac6795d DG |
1127 | } |
1128 | ||
1d4b027a DG |
1129 | /* |
1130 | * thread_manage_clients | |
1131 | * | |
1132 | * This thread manage all clients request using the unix | |
1133 | * client socket for communication. | |
1134 | */ | |
1135 | static void *thread_manage_clients(void *data) | |
1136 | { | |
1137 | int sock, ret; | |
1138 | struct command_ctx *cmd_ctx; | |
1139 | ||
1140 | DBG("[thread] Manage client started"); | |
1141 | ||
1142 | ret = lttcomm_listen_unix_sock(client_sock); | |
1143 | if (ret < 0) { | |
1144 | goto error; | |
1145 | } | |
1146 | ||
1147 | /* Notify parent pid that we are ready | |
1148 | * to accept command for client side. | |
1149 | */ | |
1150 | if (opt_sig_parent) { | |
1151 | kill(ppid, SIGCHLD); | |
1152 | } | |
1153 | ||
1154 | while (1) { | |
1155 | /* Blocking call, waiting for transmission */ | |
1156 | DBG("Accepting client command ..."); | |
1157 | sock = lttcomm_accept_unix_sock(client_sock); | |
1158 | if (sock < 0) { | |
1159 | goto error; | |
1160 | } | |
1161 | ||
1162 | /* Allocate context command to process the client request */ | |
1163 | cmd_ctx = malloc(sizeof(struct command_ctx)); | |
1164 | ||
1165 | /* Allocate data buffer for reception */ | |
1166 | cmd_ctx->lsm = malloc(sizeof(struct lttcomm_session_msg)); | |
1167 | cmd_ctx->llm = NULL; | |
1168 | cmd_ctx->session = NULL; | |
1169 | ||
1170 | /* | |
1171 | * Data is received from the lttng client. The struct | |
1172 | * lttcomm_session_msg (lsm) contains the command and data request of | |
1173 | * the client. | |
1174 | */ | |
1175 | DBG("Receiving data from client ..."); | |
1176 | ret = lttcomm_recv_unix_sock(sock, cmd_ctx->lsm, sizeof(struct lttcomm_session_msg)); | |
1177 | if (ret <= 0) { | |
1178 | continue; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * This function dispatch the work to the kernel or userspace tracer | |
1183 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
1184 | * informations for the client. The command context struct contains | |
1185 | * everything this function may needs. | |
1186 | */ | |
1187 | ret = process_client_msg(cmd_ctx); | |
1188 | if (ret < 0) { | |
1189 | /* TODO: Inform client somehow of the fatal error. At this point, | |
1190 | * ret < 0 means that a malloc failed (ENOMEM). */ | |
1191 | /* Error detected but still accept command */ | |
1192 | clean_command_ctx(cmd_ctx); | |
1193 | continue; | |
1194 | } | |
1195 | ||
1196 | DBG("Sending response (size: %d, retcode: %d)", | |
1197 | cmd_ctx->lttng_msg_size, cmd_ctx->llm->ret_code); | |
1198 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); | |
1199 | if (ret < 0) { | |
1200 | ERR("Failed to send data back to client"); | |
1201 | } | |
1202 | ||
1203 | clean_command_ctx(cmd_ctx); | |
1204 | } | |
1205 | ||
1206 | error: | |
1207 | return NULL; | |
1208 | } | |
1209 | ||
1210 | ||
fac6795d DG |
1211 | /* |
1212 | * usage function on stderr | |
1213 | */ | |
1214 | static void usage(void) | |
1215 | { | |
b716ce68 | 1216 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
1217 | fprintf(stderr, " -h, --help Display this usage.\n"); |
1218 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
1219 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
1220 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
1221 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
1222 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
1223 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
1224 | fprintf(stderr, " -V, --version Show version number.\n"); | |
1225 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
1226 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
1227 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
fac6795d DG |
1228 | } |
1229 | ||
1230 | /* | |
1231 | * daemon argument parsing | |
1232 | */ | |
1233 | static int parse_args(int argc, char **argv) | |
1234 | { | |
1235 | int c; | |
1236 | ||
1237 | static struct option long_options[] = { | |
1238 | { "client-sock", 1, 0, 'c' }, | |
1239 | { "apps-sock", 1, 0, 'a' }, | |
d6f42150 DG |
1240 | { "kconsumerd-cmd-sock", 1, 0, 0 }, |
1241 | { "kconsumerd-err-sock", 1, 0, 0 }, | |
fac6795d | 1242 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 1243 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
1244 | { "help", 0, 0, 'h' }, |
1245 | { "group", 1, 0, 'g' }, | |
1246 | { "version", 0, 0, 'V' }, | |
75462a81 | 1247 | { "quiet", 0, 0, 'q' }, |
3f9947db | 1248 | { "verbose", 0, 0, 'v' }, |
fac6795d DG |
1249 | { NULL, 0, 0, 0 } |
1250 | }; | |
1251 | ||
1252 | while (1) { | |
1253 | int option_index = 0; | |
d6f42150 | 1254 | c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:E:C:", long_options, &option_index); |
fac6795d DG |
1255 | if (c == -1) { |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | switch (c) { | |
1260 | case 0: | |
1261 | fprintf(stderr, "option %s", long_options[option_index].name); | |
1262 | if (optarg) { | |
1263 | fprintf(stderr, " with arg %s\n", optarg); | |
1264 | } | |
1265 | break; | |
b716ce68 | 1266 | case 'c': |
fac6795d DG |
1267 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
1268 | break; | |
1269 | case 'a': | |
1270 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
1271 | break; | |
1272 | case 'd': | |
1273 | opt_daemon = 1; | |
1274 | break; | |
1275 | case 'g': | |
1276 | opt_tracing_group = strdup(optarg); | |
1277 | break; | |
1278 | case 'h': | |
1279 | usage(); | |
1280 | exit(EXIT_FAILURE); | |
1281 | case 'V': | |
1282 | fprintf(stdout, "%s\n", VERSION); | |
1283 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
1284 | case 'S': |
1285 | opt_sig_parent = 1; | |
1286 | break; | |
d6f42150 DG |
1287 | case 'E': |
1288 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, "%s", optarg); | |
1289 | break; | |
1290 | case 'C': | |
1291 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
1292 | break; | |
75462a81 DG |
1293 | case 'q': |
1294 | opt_quiet = 1; | |
1295 | break; | |
3f9947db DG |
1296 | case 'v': |
1297 | opt_verbose = 1; | |
1298 | break; | |
fac6795d DG |
1299 | default: |
1300 | /* Unknown option or other error. | |
1301 | * Error is printed by getopt, just return */ | |
1302 | return -1; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | * init_daemon_socket | |
1311 | * | |
1312 | * Creates the two needed socket by the daemon. | |
d6f42150 DG |
1313 | * apps_sock - The communication socket for all UST apps. |
1314 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d DG |
1315 | */ |
1316 | static int init_daemon_socket() | |
1317 | { | |
1318 | int ret = 0; | |
1319 | mode_t old_umask; | |
1320 | ||
1321 | old_umask = umask(0); | |
1322 | ||
1323 | /* Create client tool unix socket */ | |
d6f42150 DG |
1324 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
1325 | if (client_sock < 0) { | |
1326 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
1327 | ret = -1; |
1328 | goto end; | |
1329 | } | |
1330 | ||
1331 | /* File permission MUST be 660 */ | |
1332 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
1333 | if (ret < 0) { | |
d6f42150 | 1334 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
1335 | perror("chmod"); |
1336 | goto end; | |
1337 | } | |
1338 | ||
1339 | /* Create the application unix socket */ | |
d6f42150 DG |
1340 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
1341 | if (apps_sock < 0) { | |
1342 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
1343 | ret = -1; |
1344 | goto end; | |
1345 | } | |
1346 | ||
d6f42150 | 1347 | /* File permission MUST be 666 */ |
fac6795d DG |
1348 | ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
1349 | if (ret < 0) { | |
d6f42150 | 1350 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
1351 | perror("chmod"); |
1352 | goto end; | |
1353 | } | |
1354 | ||
1355 | end: | |
1356 | umask(old_umask); | |
1357 | return ret; | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * check_existing_daemon | |
1362 | * | |
1363 | * Check if the global socket is available. | |
62bd06d8 | 1364 | * If yes, error is returned. |
fac6795d DG |
1365 | */ |
1366 | static int check_existing_daemon() | |
1367 | { | |
1368 | int ret; | |
1369 | ||
1370 | ret = access(client_unix_sock_path, F_OK); | |
1371 | if (ret == 0) { | |
1372 | ret = access(apps_unix_sock_path, F_OK); | |
1373 | } | |
1374 | ||
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | /* | |
62bd06d8 | 1379 | * get_home_dir |
fac6795d | 1380 | * |
62bd06d8 DG |
1381 | * Return pointer to home directory path using |
1382 | * the env variable HOME. | |
fac6795d | 1383 | * |
62bd06d8 | 1384 | * Default : /tmp |
fac6795d DG |
1385 | */ |
1386 | static const char *get_home_dir(void) | |
1387 | { | |
1388 | const char *home_path; | |
1389 | ||
686204ab | 1390 | if ((home_path = (const char *) getenv("HOME")) == NULL) { |
fac6795d DG |
1391 | home_path = default_home_dir; |
1392 | } | |
1393 | ||
1394 | return home_path; | |
1395 | } | |
1396 | ||
1397 | /* | |
d6f42150 | 1398 | * set_permissions |
fac6795d | 1399 | * |
5e16da05 MD |
1400 | * Set the tracing group gid onto the client socket. |
1401 | * | |
1402 | * Race window between mkdir and chown is OK because we are going from | |
1403 | * less permissive (root.root) to more permissive (root.tracing). | |
fac6795d | 1404 | */ |
d6f42150 | 1405 | static int set_permissions(void) |
fac6795d DG |
1406 | { |
1407 | int ret; | |
1408 | struct group *grp; | |
1409 | ||
1410 | /* Decide which group name to use */ | |
1411 | (opt_tracing_group != NULL) ? | |
1412 | (grp = getgrnam(opt_tracing_group)) : | |
1413 | (grp = getgrnam(default_tracing_group)); | |
1414 | ||
1415 | if (grp == NULL) { | |
75462a81 | 1416 | ERR("Missing tracing group. Aborting execution.\n"); |
fac6795d DG |
1417 | ret = -1; |
1418 | goto end; | |
1419 | } | |
1420 | ||
d6f42150 DG |
1421 | /* Set lttng run dir */ |
1422 | ret = chown(LTTNG_RUNDIR, 0, grp->gr_gid); | |
1423 | if (ret < 0) { | |
1424 | ERR("Unable to set group on " LTTNG_RUNDIR); | |
1425 | perror("chown"); | |
1426 | } | |
1427 | ||
1428 | /* lttng client socket path */ | |
fac6795d DG |
1429 | ret = chown(client_unix_sock_path, 0, grp->gr_gid); |
1430 | if (ret < 0) { | |
d6f42150 DG |
1431 | ERR("Unable to set group on %s", client_unix_sock_path); |
1432 | perror("chown"); | |
1433 | } | |
1434 | ||
1435 | /* kconsumerd error socket path */ | |
1436 | ret = chown(kconsumerd_err_unix_sock_path, 0, grp->gr_gid); | |
1437 | if (ret < 0) { | |
1438 | ERR("Unable to set group on %s", kconsumerd_err_unix_sock_path); | |
fac6795d DG |
1439 | perror("chown"); |
1440 | } | |
1441 | ||
d6f42150 | 1442 | DBG("All permissions are set"); |
e07ae692 | 1443 | |
fac6795d DG |
1444 | end: |
1445 | return ret; | |
1446 | } | |
1447 | ||
d6f42150 DG |
1448 | /* |
1449 | * create_lttng_rundir | |
1450 | * | |
1451 | * Create the lttng run directory needed for all | |
1452 | * global sockets and pipe. | |
1453 | */ | |
1454 | static int create_lttng_rundir(void) | |
1455 | { | |
1456 | int ret; | |
1457 | ||
1458 | ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG ); | |
1459 | if (ret < 0) { | |
b1f11e69 DG |
1460 | if (errno != EEXIST) { |
1461 | ERR("Unable to create " LTTNG_RUNDIR); | |
1462 | goto error; | |
1463 | } else { | |
1464 | ret = 0; | |
1465 | } | |
d6f42150 DG |
1466 | } |
1467 | ||
1468 | error: | |
1469 | return ret; | |
1470 | } | |
1471 | ||
20fe2104 DG |
1472 | /* |
1473 | * init_kernel_tracer | |
1474 | * | |
1475 | * Setup necessary data for kernel tracer action. | |
1476 | */ | |
1477 | static void init_kernel_tracer(void) | |
1478 | { | |
1479 | /* Set the global kernel tracer fd */ | |
1480 | kernel_tracer_fd = open(DEFAULT_KERNEL_TRACER_PATH, O_RDWR); | |
1481 | if (kernel_tracer_fd < 0) { | |
1482 | WARN("No kernel tracer available"); | |
1483 | kernel_tracer_fd = 0; | |
1484 | } | |
8c0faa1d DG |
1485 | |
1486 | DBG("Kernel tracer fd %d", kernel_tracer_fd); | |
20fe2104 DG |
1487 | } |
1488 | ||
d6f42150 DG |
1489 | /* |
1490 | * set_kconsumerd_sockets | |
1491 | * | |
1492 | * Setup sockets and directory needed by the kconsumerd | |
1493 | * communication with the session daemon. | |
1494 | */ | |
1495 | static int set_kconsumerd_sockets(void) | |
1496 | { | |
1497 | int ret; | |
1498 | ||
1499 | if (strlen(kconsumerd_err_unix_sock_path) == 0) { | |
1500 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH); | |
1501 | } | |
1502 | ||
1503 | if (strlen(kconsumerd_cmd_unix_sock_path) == 0) { | |
1504 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH); | |
1505 | } | |
1506 | ||
1507 | ret = mkdir(KCONSUMERD_PATH, S_IRWXU | S_IRWXG); | |
1508 | if (ret < 0) { | |
1509 | ERR("Failed to create " KCONSUMERD_PATH); | |
1510 | goto error; | |
1511 | } | |
1512 | ||
1513 | /* Create the kconsumerd error unix socket */ | |
1514 | kconsumerd_err_sock = lttcomm_create_unix_sock(kconsumerd_err_unix_sock_path); | |
1515 | if (kconsumerd_err_sock < 0) { | |
1516 | ERR("Create unix sock failed: %s", kconsumerd_err_unix_sock_path); | |
1517 | ret = -1; | |
1518 | goto error; | |
1519 | } | |
1520 | ||
1521 | /* File permission MUST be 660 */ | |
1522 | ret = chmod(kconsumerd_err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
1523 | if (ret < 0) { | |
1524 | ERR("Set file permissions failed: %s", kconsumerd_err_unix_sock_path); | |
1525 | perror("chmod"); | |
1526 | goto error; | |
1527 | } | |
1528 | ||
1529 | error: | |
1530 | return ret; | |
1531 | } | |
1532 | ||
fac6795d | 1533 | /* |
62bd06d8 | 1534 | * sighandler |
fac6795d | 1535 | * |
62bd06d8 | 1536 | * Signal handler for the daemon |
fac6795d DG |
1537 | */ |
1538 | static void sighandler(int sig) | |
1539 | { | |
1540 | switch (sig) { | |
1541 | case SIGPIPE: | |
e07ae692 | 1542 | DBG("SIGPIPE catched"); |
87378cf5 | 1543 | return; |
fac6795d | 1544 | case SIGINT: |
e07ae692 DG |
1545 | DBG("SIGINT catched"); |
1546 | cleanup(); | |
1547 | break; | |
fac6795d | 1548 | case SIGTERM: |
e07ae692 | 1549 | DBG("SIGTERM catched"); |
fac6795d | 1550 | cleanup(); |
686204ab | 1551 | break; |
fac6795d DG |
1552 | default: |
1553 | break; | |
1554 | } | |
1555 | ||
1556 | exit(EXIT_SUCCESS); | |
1557 | } | |
1558 | ||
1559 | /* | |
1d4b027a | 1560 | * set_signal_handler |
fac6795d | 1561 | * |
1d4b027a DG |
1562 | * Setup signal handler for : |
1563 | * SIGINT, SIGTERM, SIGPIPE | |
fac6795d | 1564 | */ |
1d4b027a | 1565 | static int set_signal_handler(void) |
fac6795d | 1566 | { |
1d4b027a DG |
1567 | int ret = 0; |
1568 | struct sigaction sa; | |
1569 | sigset_t sigset; | |
fac6795d | 1570 | |
1d4b027a DG |
1571 | if ((ret = sigemptyset(&sigset)) < 0) { |
1572 | perror("sigemptyset"); | |
1573 | return ret; | |
1574 | } | |
d6f42150 | 1575 | |
1d4b027a DG |
1576 | sa.sa_handler = sighandler; |
1577 | sa.sa_mask = sigset; | |
1578 | sa.sa_flags = 0; | |
1579 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
1580 | perror("sigaction"); | |
1581 | return ret; | |
d6f42150 DG |
1582 | } |
1583 | ||
1d4b027a DG |
1584 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
1585 | perror("sigaction"); | |
1586 | return ret; | |
d6f42150 | 1587 | } |
aaf26714 | 1588 | |
1d4b027a DG |
1589 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
1590 | perror("sigaction"); | |
1591 | return ret; | |
8c0faa1d DG |
1592 | } |
1593 | ||
1d4b027a DG |
1594 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
1595 | ||
1596 | return ret; | |
fac6795d DG |
1597 | } |
1598 | ||
1599 | /* | |
1600 | * main | |
1601 | */ | |
1602 | int main(int argc, char **argv) | |
1603 | { | |
fac6795d DG |
1604 | int ret = 0; |
1605 | void *status; | |
fac6795d DG |
1606 | |
1607 | /* Parse arguments */ | |
1608 | progname = argv[0]; | |
1609 | if ((ret = parse_args(argc, argv) < 0)) { | |
1610 | goto error; | |
1611 | } | |
1612 | ||
1613 | /* Daemonize */ | |
1614 | if (opt_daemon) { | |
53094c05 DG |
1615 | ret = daemon(0, 0); |
1616 | if (ret < 0) { | |
1617 | perror("daemon"); | |
1618 | goto error; | |
1619 | } | |
fac6795d DG |
1620 | } |
1621 | ||
1622 | /* Check if daemon is UID = 0 */ | |
1623 | is_root = !getuid(); | |
1624 | ||
1625 | /* Set all sockets path */ | |
1626 | if (is_root) { | |
d6f42150 DG |
1627 | ret = create_lttng_rundir(); |
1628 | if (ret < 0) { | |
1629 | goto error; | |
1630 | } | |
1631 | ||
fac6795d | 1632 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
1633 | snprintf(apps_unix_sock_path, PATH_MAX, |
1634 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
1635 | } |
1636 | ||
1637 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
1638 | snprintf(client_unix_sock_path, PATH_MAX, |
1639 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
1640 | } | |
1641 | ||
1642 | ret = set_kconsumerd_sockets(); | |
1643 | if (ret < 0) { | |
1644 | goto error; | |
fac6795d | 1645 | } |
20fe2104 DG |
1646 | |
1647 | /* Setup kernel tracer */ | |
1648 | init_kernel_tracer(); | |
fac6795d DG |
1649 | } else { |
1650 | if (strlen(apps_unix_sock_path) == 0) { | |
d6f42150 DG |
1651 | snprintf(apps_unix_sock_path, PATH_MAX, |
1652 | DEFAULT_HOME_APPS_UNIX_SOCK, get_home_dir()); | |
fac6795d DG |
1653 | } |
1654 | ||
1655 | /* Set the cli tool unix socket path */ | |
1656 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
1657 | snprintf(client_unix_sock_path, PATH_MAX, |
1658 | DEFAULT_HOME_CLIENT_UNIX_SOCK, get_home_dir()); | |
fac6795d DG |
1659 | } |
1660 | } | |
1661 | ||
847177cd DG |
1662 | DBG("Client socket path %s", client_unix_sock_path); |
1663 | DBG("Application socket path %s", apps_unix_sock_path); | |
1664 | ||
fac6795d DG |
1665 | /* See if daemon already exist. If any of the two |
1666 | * socket needed by the daemon are present, this test fails | |
1667 | */ | |
1668 | if ((ret = check_existing_daemon()) == 0) { | |
75462a81 | 1669 | ERR("Already running daemon.\n"); |
ab118b20 | 1670 | /* We do not goto error because we must not |
d6f42150 | 1671 | * cleanup() because a daemon is already running. |
ab118b20 | 1672 | */ |
5e16da05 | 1673 | exit(EXIT_FAILURE); |
fac6795d DG |
1674 | } |
1675 | ||
1676 | if (set_signal_handler() < 0) { | |
1677 | goto error; | |
1678 | } | |
1679 | ||
d6f42150 | 1680 | /* Setup the needed unix socket */ |
fac6795d DG |
1681 | if (init_daemon_socket() < 0) { |
1682 | goto error; | |
1683 | } | |
1684 | ||
1685 | /* Set credentials to socket */ | |
d6f42150 | 1686 | if (is_root && (set_permissions() < 0)) { |
fac6795d DG |
1687 | goto error; |
1688 | } | |
1689 | ||
5b8719f5 DG |
1690 | /* Get parent pid if -S, --sig-parent is specified. */ |
1691 | if (opt_sig_parent) { | |
1692 | ppid = getppid(); | |
1693 | } | |
1694 | ||
fac6795d DG |
1695 | while (1) { |
1696 | /* Create thread to manage the client socket */ | |
1d4b027a | 1697 | ret = pthread_create(&client_thread, NULL, thread_manage_clients, (void *) NULL); |
fac6795d DG |
1698 | if (ret != 0) { |
1699 | perror("pthread_create"); | |
1700 | goto error; | |
1701 | } | |
1702 | ||
1703 | /* Create thread to manage application socket */ | |
1d4b027a | 1704 | ret = pthread_create(&apps_thread, NULL, thread_manage_apps, (void *) NULL); |
fac6795d DG |
1705 | if (ret != 0) { |
1706 | perror("pthread_create"); | |
1707 | goto error; | |
1708 | } | |
1709 | ||
1d4b027a DG |
1710 | ret = pthread_join(client_thread, &status); |
1711 | if (ret != 0) { | |
1712 | perror("pthread_join"); | |
1713 | goto error; | |
fac6795d DG |
1714 | } |
1715 | } | |
1716 | ||
1717 | cleanup(); | |
5e16da05 | 1718 | exit(EXIT_SUCCESS); |
fac6795d DG |
1719 | |
1720 | error: | |
1721 | cleanup(); | |
5e16da05 | 1722 | exit(EXIT_FAILURE); |
fac6795d | 1723 | } |