Commit | Line | Data |
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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> | |
25 | #include <signal.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | #include <sys/ipc.h> | |
30 | #include <sys/shm.h> | |
31 | #include <sys/socket.h> | |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
34 | #include <unistd.h> | |
35 | ||
36 | #include <urcu/list.h> /* URCU list library (-lurcu) */ | |
37 | #include <ust/ustctl.h> /* UST control lib (-lust) */ | |
5b97ec60 | 38 | #include <lttng/lttng.h> |
fac6795d DG |
39 | |
40 | #include "liblttsessiondcomm.h" | |
41 | #include "ltt-sessiond.h" | |
75462a81 | 42 | #include "lttngerr.h" |
5b74c7b1 | 43 | #include "session.h" |
fda89c9b | 44 | #include "trace.h" |
91d76f53 | 45 | #include "traceable-app.h" |
fac6795d | 46 | |
75462a81 | 47 | /* Const values */ |
686204ab MD |
48 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
49 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; | |
50 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; | |
51 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
52 | ||
fac6795d | 53 | /* Static functions */ |
fac6795d | 54 | static int check_existing_daemon(void); |
1fd70b72 | 55 | static int connect_app(pid_t pid); |
fac6795d | 56 | static int init_daemon_socket(void); |
62bd06d8 | 57 | static int notify_apps(const char* name); |
e065084a DG |
58 | static int process_client_msg(int sock, struct lttcomm_session_msg*); |
59 | static int send_unix_sock(int sock, void *buf, size_t len); | |
62bd06d8 | 60 | static int set_signal_handler(void); |
d6f42150 | 61 | static int set_permissions(void); |
6abb15de | 62 | static int setup_data_buffer(char **buf, size_t size, struct lttcomm_lttng_header *llh); |
d6f42150 DG |
63 | static int create_lttng_rundir(void); |
64 | static int set_kconsumerd_sockets(void); | |
62bd06d8 | 65 | static void cleanup(void); |
6abb15de | 66 | static void copy_common_data(struct lttcomm_lttng_header *llh, struct lttcomm_session_msg *lsm); |
62bd06d8 | 67 | static void sighandler(int sig); |
fac6795d | 68 | |
1fd70b72 DG |
69 | static void *thread_manage_clients(void *data); |
70 | static void *thread_manage_apps(void *data); | |
d6f42150 | 71 | static void *thread_manage_kconsumerd(void *data); |
fac6795d | 72 | |
fac6795d | 73 | /* Variables */ |
62bd06d8 DG |
74 | int opt_verbose; |
75 | int opt_quiet; | |
fac6795d DG |
76 | const char *progname; |
77 | const char *opt_tracing_group; | |
5b8719f5 | 78 | static int opt_sig_parent; |
fac6795d DG |
79 | static int opt_daemon; |
80 | static int is_root; /* Set to 1 if the daemon is running as root */ | |
5b8719f5 | 81 | static pid_t ppid; |
fac6795d | 82 | |
d6f42150 DG |
83 | static char apps_unix_sock_path[PATH_MAX]; /* Global application Unix socket path */ |
84 | static char client_unix_sock_path[PATH_MAX]; /* Global client Unix socket path */ | |
85 | static char kconsumerd_err_unix_sock_path[PATH_MAX]; /* kconsumerd error Unix socket path */ | |
86 | static char kconsumerd_cmd_unix_sock_path[PATH_MAX]; /* kconsumerd command Unix socket path */ | |
fac6795d | 87 | |
d6f42150 DG |
88 | static int client_sock; |
89 | static int apps_sock; | |
90 | static int kconsumerd_err_sock; | |
fac6795d DG |
91 | |
92 | static struct ltt_session *current_session; | |
e065084a | 93 | |
d6f42150 DG |
94 | /* |
95 | * thread_manage_kconsumerd | |
96 | * | |
97 | * This thread manage the kconsumerd error sent | |
98 | * back to the session daemon. | |
99 | */ | |
100 | static void *thread_manage_kconsumerd(void *data) | |
101 | { | |
102 | int sock, ret; | |
103 | ||
104 | DBG("[thread] Manage kconsumerd started"); | |
105 | ||
106 | ret = lttcomm_listen_unix_sock(kconsumerd_err_sock); | |
107 | if (ret < 0) { | |
108 | goto error; | |
109 | } | |
110 | ||
111 | sock = lttcomm_accept_unix_sock(kconsumerd_err_sock); | |
112 | if (sock < 0) { | |
113 | goto error; | |
114 | } | |
115 | ||
116 | while (1) { | |
117 | //ret = lttcomm_recv_unix_sock(sock, &lsm, sizeof(lsm)); | |
118 | if (ret <= 0) { | |
119 | /* TODO: Consumerd died? */ | |
120 | continue; | |
121 | } | |
122 | } | |
123 | ||
124 | error: | |
125 | return NULL; | |
126 | } | |
127 | ||
fac6795d DG |
128 | /* |
129 | * thread_manage_apps | |
130 | * | |
131 | * This thread manage the application socket communication | |
132 | */ | |
133 | static void *thread_manage_apps(void *data) | |
134 | { | |
135 | int sock, ret; | |
fac6795d DG |
136 | |
137 | /* TODO: Something more elegant is needed but fine for now */ | |
686204ab | 138 | struct { |
fac6795d | 139 | int reg; /* 1:register, 0:unregister */ |
686204ab MD |
140 | pid_t pid; |
141 | uid_t uid; | |
142 | } reg_msg; | |
fac6795d | 143 | |
e07ae692 DG |
144 | DBG("[thread] Manage apps started"); |
145 | ||
fac6795d DG |
146 | /* Notify all applications to register */ |
147 | notify_apps(default_global_apps_pipe); | |
148 | ||
d6f42150 | 149 | ret = lttcomm_listen_unix_sock(apps_sock); |
fac6795d DG |
150 | if (ret < 0) { |
151 | goto error; | |
152 | } | |
153 | ||
154 | while (1) { | |
155 | /* Blocking call, waiting for transmission */ | |
d6f42150 | 156 | sock = lttcomm_accept_unix_sock(apps_sock); |
fac6795d DG |
157 | if (sock < 0) { |
158 | goto error; | |
159 | } | |
160 | ||
161 | /* Basic recv here to handle the very simple data | |
162 | * that the libust send to register (reg_msg). | |
163 | */ | |
164 | ret = recv(sock, ®_msg, sizeof(reg_msg), 0); | |
165 | if (ret < 0) { | |
166 | perror("recv"); | |
167 | continue; | |
168 | } | |
169 | ||
170 | /* Add application to the global traceable list */ | |
171 | if (reg_msg.reg == 1) { | |
172 | /* Registering */ | |
91d76f53 DG |
173 | ret = register_traceable_app(reg_msg.pid, reg_msg.uid); |
174 | if (ret < 0) { | |
175 | /* register_traceable_app only return an error with | |
176 | * ENOMEM. At this point, we better stop everything. | |
177 | */ | |
178 | goto error; | |
179 | } | |
fac6795d DG |
180 | } else { |
181 | /* Unregistering */ | |
91d76f53 | 182 | unregister_traceable_app(reg_msg.pid); |
fac6795d DG |
183 | } |
184 | } | |
185 | ||
186 | error: | |
187 | ||
188 | return NULL; | |
189 | } | |
190 | ||
191 | /* | |
192 | * thread_manage_clients | |
193 | * | |
194 | * This thread manage all clients request using the unix | |
195 | * client socket for communication. | |
196 | */ | |
197 | static void *thread_manage_clients(void *data) | |
198 | { | |
199 | int sock, ret; | |
200 | struct lttcomm_session_msg lsm; | |
fac6795d | 201 | |
e07ae692 DG |
202 | DBG("[thread] Manage client started"); |
203 | ||
d6f42150 | 204 | ret = lttcomm_listen_unix_sock(client_sock); |
fac6795d DG |
205 | if (ret < 0) { |
206 | goto error; | |
207 | } | |
208 | ||
5b8719f5 DG |
209 | /* Notify parent pid that we are ready |
210 | * to accept command for client side. | |
211 | */ | |
212 | if (opt_sig_parent) { | |
213 | kill(ppid, SIGCHLD); | |
214 | } | |
215 | ||
fac6795d DG |
216 | while (1) { |
217 | /* Blocking call, waiting for transmission */ | |
d6f42150 | 218 | sock = lttcomm_accept_unix_sock(client_sock); |
fac6795d DG |
219 | if (sock < 0) { |
220 | goto error; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Data is received from the lttng client. The struct | |
225 | * lttcomm_session_msg (lsm) contains the command and data | |
226 | * request of the client. | |
227 | */ | |
228 | ret = lttcomm_recv_unix_sock(sock, &lsm, sizeof(lsm)); | |
87378cf5 | 229 | if (ret <= 0) { |
fac6795d DG |
230 | continue; |
231 | } | |
232 | ||
233 | /* This function dispatch the work to the LTTng or UST libs | |
e065084a | 234 | * and then sends back the response to the client. This is needed |
6abb15de | 235 | * because there might be more then one lttcomm_lttng_header to |
e065084a | 236 | * send out so process_client_msg do both jobs. |
fac6795d | 237 | */ |
e065084a DG |
238 | ret = process_client_msg(sock, &lsm); |
239 | if (ret < 0) { | |
240 | /* Error detected but still accept command */ | |
241 | continue; | |
fac6795d DG |
242 | } |
243 | } | |
244 | ||
245 | error: | |
246 | return NULL; | |
247 | } | |
248 | ||
e065084a DG |
249 | /* |
250 | * send_unix_sock | |
251 | * | |
252 | * Send data on a unix socket using the liblttsessiondcomm API. | |
253 | * | |
254 | * Return lttcomm error code. | |
255 | */ | |
256 | static int send_unix_sock(int sock, void *buf, size_t len) | |
257 | { | |
258 | /* Check valid length */ | |
259 | if (len <= 0) { | |
260 | return -1; | |
261 | } | |
262 | ||
263 | return lttcomm_send_unix_sock(sock, buf, len); | |
264 | } | |
265 | ||
fac6795d DG |
266 | /* |
267 | * connect_app | |
268 | * | |
269 | * Return a socket connected to the libust communication socket | |
270 | * of the application identified by the pid. | |
379473d2 DG |
271 | * |
272 | * If the pid is not found in the traceable list, | |
273 | * return -1 to indicate error. | |
fac6795d DG |
274 | */ |
275 | static int connect_app(pid_t pid) | |
276 | { | |
91d76f53 DG |
277 | int sock; |
278 | struct ltt_traceable_app *lta; | |
379473d2 | 279 | |
e07ae692 DG |
280 | DBG("Connect to application pid %d", pid); |
281 | ||
91d76f53 DG |
282 | lta = find_app_by_pid(pid); |
283 | if (lta == NULL) { | |
284 | /* App not found */ | |
7442b2ba | 285 | DBG("Application pid %d not found", pid); |
379473d2 DG |
286 | return -1; |
287 | } | |
fac6795d | 288 | |
91d76f53 | 289 | sock = ustctl_connect_pid(lta->pid); |
fac6795d | 290 | if (sock < 0) { |
75462a81 | 291 | ERR("Fail connecting to the PID %d\n", pid); |
fac6795d DG |
292 | } |
293 | ||
294 | return sock; | |
295 | } | |
296 | ||
297 | /* | |
298 | * notify_apps | |
299 | * | |
300 | * Notify apps by writing 42 to a named pipe using name. | |
301 | * Every applications waiting for a ltt-sessiond will be notified | |
302 | * and re-register automatically to the session daemon. | |
303 | * | |
304 | * Return open or write error value. | |
305 | */ | |
306 | static int notify_apps(const char *name) | |
307 | { | |
308 | int fd; | |
309 | int ret = -1; | |
310 | ||
e07ae692 DG |
311 | DBG("Notify the global application pipe"); |
312 | ||
fac6795d DG |
313 | /* Try opening the global pipe */ |
314 | fd = open(name, O_WRONLY); | |
315 | if (fd < 0) { | |
316 | goto error; | |
317 | } | |
318 | ||
319 | /* Notify by writing on the pipe */ | |
320 | ret = write(fd, "42", 2); | |
321 | if (ret < 0) { | |
322 | perror("write"); | |
323 | } | |
324 | ||
325 | error: | |
326 | return ret; | |
327 | } | |
328 | ||
379473d2 DG |
329 | /* |
330 | * ust_create_trace | |
331 | * | |
332 | * Create an userspace trace using pid. | |
333 | * This trace is then appended to the current session | |
334 | * ust trace list. | |
335 | */ | |
336 | static int ust_create_trace(pid_t pid) | |
337 | { | |
338 | int sock, ret; | |
339 | struct ltt_ust_trace *trace; | |
340 | ||
e07ae692 DG |
341 | DBG("Creating trace for pid %d", pid); |
342 | ||
379473d2 DG |
343 | trace = malloc(sizeof(struct ltt_ust_trace)); |
344 | if (trace == NULL) { | |
345 | perror("malloc"); | |
346 | ret = -1; | |
347 | goto error; | |
348 | } | |
349 | ||
350 | /* Init */ | |
351 | trace->pid = pid; | |
352 | trace->shmid = 0; | |
1657e9bb DG |
353 | /* NOTE: to be removed. Trace name will no longer be |
354 | * required for LTTng userspace tracer. For now, we set it | |
355 | * to 'auto' for API compliance. | |
356 | */ | |
357 | snprintf(trace->name, 5, "auto"); | |
379473d2 DG |
358 | |
359 | /* Connect to app using ustctl API */ | |
360 | sock = connect_app(pid); | |
361 | if (sock < 0) { | |
362 | ret = LTTCOMM_NO_TRACEABLE; | |
363 | goto error; | |
364 | } | |
365 | ||
1657e9bb | 366 | ret = ustctl_create_trace(sock, trace->name); |
379473d2 DG |
367 | if (ret < 0) { |
368 | ret = LTTCOMM_CREATE_FAIL; | |
369 | goto error; | |
370 | } | |
371 | ||
372 | /* Check if current session is valid */ | |
373 | if (current_session) { | |
374 | cds_list_add(&trace->list, ¤t_session->ust_traces); | |
1657e9bb | 375 | current_session->ust_trace_count++; |
379473d2 DG |
376 | } |
377 | ||
378 | error: | |
379 | return ret; | |
380 | } | |
381 | ||
ce3d728c DG |
382 | /* |
383 | * ust_start_trace | |
384 | * | |
385 | * Start a trace. This trace, identified by the pid, must be | |
386 | * in the current session ust_traces list. | |
387 | */ | |
388 | static int ust_start_trace(pid_t pid) | |
389 | { | |
390 | int sock, ret; | |
391 | struct ltt_ust_trace *trace; | |
392 | ||
393 | DBG("Starting trace for pid %d", pid); | |
394 | ||
395 | trace = find_session_ust_trace_by_pid(current_session, pid); | |
396 | if (trace == NULL) { | |
397 | ret = LTTCOMM_NO_TRACE; | |
398 | goto error; | |
399 | } | |
400 | ||
401 | /* Connect to app using ustctl API */ | |
402 | sock = connect_app(pid); | |
403 | if (sock < 0) { | |
404 | ret = LTTCOMM_NO_TRACEABLE; | |
405 | goto error; | |
406 | } | |
407 | ||
408 | ret = ustctl_start_trace(sock, "auto"); | |
409 | if (ret < 0) { | |
410 | ret = LTTCOMM_START_FAIL; | |
411 | goto error; | |
412 | } | |
413 | ||
414 | error: | |
415 | return ret; | |
416 | } | |
417 | ||
520ff687 DG |
418 | /* |
419 | * ust_stop_trace | |
420 | * | |
421 | * Stop a trace. This trace, identified by the pid, must be | |
422 | * in the current session ust_traces list. | |
423 | */ | |
424 | static int ust_stop_trace(pid_t pid) | |
425 | { | |
426 | int sock, ret; | |
427 | struct ltt_ust_trace *trace; | |
428 | ||
429 | DBG("Stopping trace for pid %d", pid); | |
430 | ||
431 | trace = find_session_ust_trace_by_pid(current_session, pid); | |
432 | if (trace == NULL) { | |
433 | ret = LTTCOMM_NO_TRACE; | |
434 | goto error; | |
435 | } | |
436 | ||
437 | /* Connect to app using ustctl API */ | |
438 | sock = connect_app(pid); | |
439 | if (sock < 0) { | |
440 | ret = LTTCOMM_NO_TRACEABLE; | |
441 | goto error; | |
442 | } | |
443 | ||
444 | ret = ustctl_stop_trace(sock, trace->name); | |
445 | if (ret < 0) { | |
446 | ret = LTTCOMM_STOP_FAIL; | |
447 | goto error; | |
448 | } | |
449 | ||
450 | error: | |
451 | return ret; | |
452 | } | |
453 | ||
e065084a DG |
454 | /* |
455 | * copy_common_data | |
456 | * | |
6abb15de | 457 | * Copy common data between lttcomm_lttng_header and lttcomm_session_msg |
e065084a | 458 | */ |
6abb15de | 459 | static void copy_common_data(struct lttcomm_lttng_header *llh, struct lttcomm_session_msg *lsm) |
e065084a | 460 | { |
6abb15de DG |
461 | llh->cmd_type = lsm->cmd_type; |
462 | llh->pid = lsm->pid; | |
aaf97519 DG |
463 | |
464 | /* Manage uuid */ | |
8028d920 | 465 | if (!uuid_is_null(lsm->session_id)) { |
6abb15de | 466 | uuid_copy(llh->session_id, lsm->session_id); |
e065084a | 467 | } |
aaf97519 | 468 | |
6abb15de DG |
469 | strncpy(llh->trace_name, lsm->trace_name, strlen(llh->trace_name)); |
470 | llh->trace_name[strlen(llh->trace_name) - 1] = '\0'; | |
e065084a DG |
471 | } |
472 | ||
ca95a216 DG |
473 | /* |
474 | * setup_data_buffer | |
475 | * | |
476 | * Setup the outgoing data buffer for the response | |
477 | * data allocating the right amount of memory. | |
478 | * | |
479 | * Return total size of the buffer pointed by buf. | |
480 | */ | |
6abb15de | 481 | static int setup_data_buffer(char **buf, size_t s_data, struct lttcomm_lttng_header *llh) |
ca95a216 DG |
482 | { |
483 | int ret = 0; | |
ca95a216 DG |
484 | size_t buf_size; |
485 | ||
6abb15de | 486 | buf_size = sizeof(struct lttcomm_lttng_header) + s_data; |
aaf97519 DG |
487 | *buf = malloc(buf_size); |
488 | if (*buf == NULL) { | |
ca95a216 DG |
489 | perror("malloc"); |
490 | ret = -1; | |
491 | goto error; | |
492 | } | |
493 | ||
6abb15de | 494 | /* Setup lttcomm_lttng_header data and copy |
ca95a216 DG |
495 | * it to the newly allocated buffer. |
496 | */ | |
6abb15de DG |
497 | llh->payload_size = s_data; |
498 | memcpy(*buf, llh, sizeof(struct lttcomm_lttng_header)); | |
ca95a216 DG |
499 | |
500 | return buf_size; | |
501 | ||
502 | error: | |
503 | return ret; | |
504 | } | |
505 | ||
fac6795d DG |
506 | /* |
507 | * process_client_msg | |
508 | * | |
509 | * This takes the lttcomm_session_msg struct and process the command requested | |
e065084a DG |
510 | * by the client. It then creates response(s) and send it back to the |
511 | * given socket (sock). | |
fac6795d | 512 | * |
e065084a | 513 | * Return any error encountered or 0 for success. |
fac6795d | 514 | */ |
e065084a | 515 | static int process_client_msg(int sock, struct lttcomm_session_msg *lsm) |
fac6795d | 516 | { |
e065084a | 517 | int ret; |
ca95a216 | 518 | int buf_size; |
7e6e59cd | 519 | size_t header_size; |
aaf97519 | 520 | char *send_buf = NULL; |
6abb15de | 521 | struct lttcomm_lttng_header llh; |
fac6795d | 522 | |
e07ae692 DG |
523 | DBG("Processing client message"); |
524 | ||
fac6795d DG |
525 | /* Copy common data to identify the response |
526 | * on the lttng client side. | |
527 | */ | |
6abb15de | 528 | copy_common_data(&llh, lsm); |
fac6795d | 529 | |
379473d2 DG |
530 | /* Check command that needs a session */ |
531 | if (lsm->cmd_type != LTTNG_CREATE_SESSION && | |
532 | lsm->cmd_type != LTTNG_LIST_SESSIONS && | |
533 | lsm->cmd_type != UST_LIST_APPS) | |
534 | { | |
535 | current_session = find_session_by_uuid(lsm->session_id); | |
536 | if (current_session == NULL) { | |
537 | ret = LTTCOMM_SELECT_SESS; | |
538 | goto end; | |
539 | } | |
540 | } | |
541 | ||
fac6795d | 542 | /* Default return code. |
e065084a | 543 | * In our world, everything is OK... right? ;) |
fac6795d | 544 | */ |
6abb15de | 545 | llh.ret_code = LTTCOMM_OK; |
fac6795d | 546 | |
6abb15de | 547 | header_size = sizeof(struct lttcomm_lttng_header); |
7e6e59cd | 548 | |
fac6795d DG |
549 | /* Process by command type */ |
550 | switch (lsm->cmd_type) { | |
aaf97519 DG |
551 | case LTTNG_CREATE_SESSION: |
552 | { | |
6abb15de | 553 | ret = create_session(lsm->session_name, &llh.session_id); |
aaf97519 | 554 | if (ret < 0) { |
27673bb6 DG |
555 | if (ret == -1) { |
556 | ret = LTTCOMM_EXIST_SESS; | |
557 | } else { | |
558 | ret = LTTCOMM_FATAL; | |
559 | } | |
8028d920 | 560 | goto end; |
aaf97519 DG |
561 | } |
562 | ||
6abb15de | 563 | buf_size = setup_data_buffer(&send_buf, 0, &llh); |
aaf97519 DG |
564 | if (buf_size < 0) { |
565 | ret = LTTCOMM_FATAL; | |
8028d920 | 566 | goto end; |
aaf97519 DG |
567 | } |
568 | ||
aaf97519 DG |
569 | break; |
570 | } | |
8028d920 DG |
571 | case LTTNG_DESTROY_SESSION: |
572 | { | |
573 | ret = destroy_session(&lsm->session_id); | |
574 | if (ret < 0) { | |
575 | ret = LTTCOMM_NO_SESS; | |
576 | } else { | |
577 | ret = LTTCOMM_OK; | |
578 | } | |
579 | ||
6abb15de | 580 | /* No auxiliary data so only send the llh struct. */ |
8028d920 DG |
581 | goto end; |
582 | } | |
1657e9bb DG |
583 | case LTTNG_LIST_TRACES: |
584 | { | |
585 | unsigned int trace_count = get_trace_count_per_session(current_session); | |
586 | ||
587 | if (trace_count == 0) { | |
588 | ret = LTTCOMM_NO_TRACE; | |
589 | goto end; | |
590 | } | |
591 | ||
592 | buf_size = setup_data_buffer(&send_buf, | |
6abb15de | 593 | sizeof(struct lttng_trace) * trace_count, &llh); |
1657e9bb DG |
594 | if (buf_size < 0) { |
595 | ret = LTTCOMM_FATAL; | |
596 | goto end; | |
597 | } | |
598 | ||
599 | get_traces_per_session(current_session, (struct lttng_trace *)(send_buf + header_size)); | |
600 | break; | |
601 | } | |
df0da139 DG |
602 | case UST_CREATE_TRACE: |
603 | { | |
379473d2 | 604 | ret = ust_create_trace(lsm->pid); |
df0da139 | 605 | if (ret < 0) { |
ce3d728c DG |
606 | /* If -1 is returned from ust_create_trace, malloc |
607 | * failed so it's pretty much a fatal error. | |
608 | */ | |
609 | ret = LTTCOMM_FATAL; | |
379473d2 | 610 | goto end; |
df0da139 DG |
611 | } |
612 | ||
6abb15de | 613 | /* No auxiliary data so only send the llh struct. */ |
df0da139 DG |
614 | goto end; |
615 | } | |
fac6795d DG |
616 | case UST_LIST_APPS: |
617 | { | |
91d76f53 | 618 | unsigned int app_count = get_app_count(); |
ca95a216 | 619 | /* Stop right now if no apps */ |
91d76f53 | 620 | if (app_count == 0) { |
e065084a | 621 | ret = LTTCOMM_NO_APPS; |
8028d920 | 622 | goto end; |
e065084a DG |
623 | } |
624 | ||
ca95a216 DG |
625 | /* Setup data buffer and details for transmission */ |
626 | buf_size = setup_data_buffer(&send_buf, | |
6abb15de | 627 | sizeof(pid_t) * app_count, &llh); |
ca95a216 DG |
628 | if (buf_size < 0) { |
629 | ret = LTTCOMM_FATAL; | |
8028d920 | 630 | goto end; |
ca95a216 DG |
631 | } |
632 | ||
91d76f53 | 633 | get_app_list_pids((pid_t *)(send_buf + header_size)); |
ca95a216 | 634 | |
fac6795d DG |
635 | break; |
636 | } | |
ce3d728c DG |
637 | case UST_START_TRACE: |
638 | { | |
639 | ret = ust_start_trace(lsm->pid); | |
640 | ||
6abb15de | 641 | /* No auxiliary data so only send the llh struct. */ |
ce3d728c DG |
642 | goto end; |
643 | } | |
520ff687 DG |
644 | case UST_STOP_TRACE: |
645 | { | |
646 | ret = ust_stop_trace(lsm->pid); | |
647 | ||
6abb15de | 648 | /* No auxiliary data so only send the llh struct. */ |
520ff687 DG |
649 | goto end; |
650 | } | |
57167058 DG |
651 | case LTTNG_LIST_SESSIONS: |
652 | { | |
5b74c7b1 | 653 | unsigned int session_count = get_session_count(); |
ca95a216 DG |
654 | /* Stop right now if no session */ |
655 | if (session_count == 0) { | |
57167058 | 656 | ret = LTTCOMM_NO_SESS; |
8028d920 | 657 | goto end; |
57167058 DG |
658 | } |
659 | ||
ca95a216 DG |
660 | /* Setup data buffer and details for transmission */ |
661 | buf_size = setup_data_buffer(&send_buf, | |
6abb15de | 662 | (sizeof(struct lttng_session) * session_count), &llh); |
ca95a216 DG |
663 | if (buf_size < 0) { |
664 | ret = LTTCOMM_FATAL; | |
8028d920 | 665 | goto end; |
ca95a216 DG |
666 | } |
667 | ||
5b74c7b1 | 668 | get_lttng_session((struct lttng_session *)(send_buf + header_size)); |
ca95a216 | 669 | |
57167058 DG |
670 | break; |
671 | } | |
fac6795d | 672 | default: |
e065084a | 673 | { |
fac6795d | 674 | /* Undefined command */ |
e065084a | 675 | ret = LTTCOMM_UND; |
8028d920 | 676 | goto end; |
e065084a | 677 | } |
fac6795d DG |
678 | } |
679 | ||
1fd70b72 DG |
680 | ret = send_unix_sock(sock, send_buf, buf_size); |
681 | ||
ca95a216 DG |
682 | if (send_buf != NULL) { |
683 | free(send_buf); | |
684 | } | |
685 | ||
e065084a DG |
686 | return ret; |
687 | ||
8028d920 | 688 | end: |
7442b2ba | 689 | DBG("Return code to client %d", ret); |
e065084a | 690 | /* Notify client of error */ |
6abb15de DG |
691 | llh.ret_code = ret; |
692 | llh.payload_size = 0; | |
693 | send_unix_sock(sock, (void*) &llh, sizeof(llh)); | |
e065084a | 694 | |
8028d920 | 695 | return ret; |
fac6795d DG |
696 | } |
697 | ||
698 | /* | |
699 | * usage function on stderr | |
700 | */ | |
701 | static void usage(void) | |
702 | { | |
b716ce68 | 703 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
704 | fprintf(stderr, " -h, --help Display this usage.\n"); |
705 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
706 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
707 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
708 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
709 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); | |
710 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
711 | fprintf(stderr, " -V, --version Show version number.\n"); | |
712 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
713 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
714 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
fac6795d DG |
715 | } |
716 | ||
717 | /* | |
718 | * daemon argument parsing | |
719 | */ | |
720 | static int parse_args(int argc, char **argv) | |
721 | { | |
722 | int c; | |
723 | ||
724 | static struct option long_options[] = { | |
725 | { "client-sock", 1, 0, 'c' }, | |
726 | { "apps-sock", 1, 0, 'a' }, | |
d6f42150 DG |
727 | { "kconsumerd-cmd-sock", 1, 0, 0 }, |
728 | { "kconsumerd-err-sock", 1, 0, 0 }, | |
fac6795d | 729 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 730 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
731 | { "help", 0, 0, 'h' }, |
732 | { "group", 1, 0, 'g' }, | |
733 | { "version", 0, 0, 'V' }, | |
75462a81 | 734 | { "quiet", 0, 0, 'q' }, |
3f9947db | 735 | { "verbose", 0, 0, 'v' }, |
fac6795d DG |
736 | { NULL, 0, 0, 0 } |
737 | }; | |
738 | ||
739 | while (1) { | |
740 | int option_index = 0; | |
d6f42150 | 741 | c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:E:C:", long_options, &option_index); |
fac6795d DG |
742 | if (c == -1) { |
743 | break; | |
744 | } | |
745 | ||
746 | switch (c) { | |
747 | case 0: | |
748 | fprintf(stderr, "option %s", long_options[option_index].name); | |
749 | if (optarg) { | |
750 | fprintf(stderr, " with arg %s\n", optarg); | |
751 | } | |
752 | break; | |
b716ce68 | 753 | case 'c': |
fac6795d DG |
754 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
755 | break; | |
756 | case 'a': | |
757 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
758 | break; | |
759 | case 'd': | |
760 | opt_daemon = 1; | |
761 | break; | |
762 | case 'g': | |
763 | opt_tracing_group = strdup(optarg); | |
764 | break; | |
765 | case 'h': | |
766 | usage(); | |
767 | exit(EXIT_FAILURE); | |
768 | case 'V': | |
769 | fprintf(stdout, "%s\n", VERSION); | |
770 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
771 | case 'S': |
772 | opt_sig_parent = 1; | |
773 | break; | |
d6f42150 DG |
774 | case 'E': |
775 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, "%s", optarg); | |
776 | break; | |
777 | case 'C': | |
778 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
779 | break; | |
75462a81 DG |
780 | case 'q': |
781 | opt_quiet = 1; | |
782 | break; | |
3f9947db DG |
783 | case 'v': |
784 | opt_verbose = 1; | |
785 | break; | |
fac6795d DG |
786 | default: |
787 | /* Unknown option or other error. | |
788 | * Error is printed by getopt, just return */ | |
789 | return -1; | |
790 | } | |
791 | } | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | /* | |
797 | * init_daemon_socket | |
798 | * | |
799 | * Creates the two needed socket by the daemon. | |
d6f42150 DG |
800 | * apps_sock - The communication socket for all UST apps. |
801 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d DG |
802 | */ |
803 | static int init_daemon_socket() | |
804 | { | |
805 | int ret = 0; | |
806 | mode_t old_umask; | |
807 | ||
808 | old_umask = umask(0); | |
809 | ||
810 | /* Create client tool unix socket */ | |
d6f42150 DG |
811 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
812 | if (client_sock < 0) { | |
813 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
814 | ret = -1; |
815 | goto end; | |
816 | } | |
817 | ||
818 | /* File permission MUST be 660 */ | |
819 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
820 | if (ret < 0) { | |
d6f42150 | 821 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
822 | perror("chmod"); |
823 | goto end; | |
824 | } | |
825 | ||
826 | /* Create the application unix socket */ | |
d6f42150 DG |
827 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
828 | if (apps_sock < 0) { | |
829 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
830 | ret = -1; |
831 | goto end; | |
832 | } | |
833 | ||
d6f42150 | 834 | /* File permission MUST be 666 */ |
fac6795d DG |
835 | ret = chmod(apps_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
836 | if (ret < 0) { | |
d6f42150 | 837 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
838 | perror("chmod"); |
839 | goto end; | |
840 | } | |
841 | ||
842 | end: | |
843 | umask(old_umask); | |
844 | return ret; | |
845 | } | |
846 | ||
847 | /* | |
848 | * check_existing_daemon | |
849 | * | |
850 | * Check if the global socket is available. | |
62bd06d8 | 851 | * If yes, error is returned. |
fac6795d DG |
852 | */ |
853 | static int check_existing_daemon() | |
854 | { | |
855 | int ret; | |
856 | ||
857 | ret = access(client_unix_sock_path, F_OK); | |
858 | if (ret == 0) { | |
859 | ret = access(apps_unix_sock_path, F_OK); | |
860 | } | |
861 | ||
862 | return ret; | |
863 | } | |
864 | ||
865 | /* | |
62bd06d8 | 866 | * get_home_dir |
fac6795d | 867 | * |
62bd06d8 DG |
868 | * Return pointer to home directory path using |
869 | * the env variable HOME. | |
fac6795d | 870 | * |
62bd06d8 | 871 | * Default : /tmp |
fac6795d DG |
872 | */ |
873 | static const char *get_home_dir(void) | |
874 | { | |
875 | const char *home_path; | |
876 | ||
686204ab | 877 | if ((home_path = (const char *) getenv("HOME")) == NULL) { |
fac6795d DG |
878 | home_path = default_home_dir; |
879 | } | |
880 | ||
881 | return home_path; | |
882 | } | |
883 | ||
884 | /* | |
d6f42150 | 885 | * set_permissions |
fac6795d DG |
886 | * |
887 | * Set the tracing group gid onto the client socket. | |
888 | */ | |
d6f42150 | 889 | static int set_permissions(void) |
fac6795d DG |
890 | { |
891 | int ret; | |
892 | struct group *grp; | |
893 | ||
894 | /* Decide which group name to use */ | |
895 | (opt_tracing_group != NULL) ? | |
896 | (grp = getgrnam(opt_tracing_group)) : | |
897 | (grp = getgrnam(default_tracing_group)); | |
898 | ||
899 | if (grp == NULL) { | |
75462a81 | 900 | ERR("Missing tracing group. Aborting execution.\n"); |
fac6795d DG |
901 | ret = -1; |
902 | goto end; | |
903 | } | |
904 | ||
d6f42150 DG |
905 | /* Set lttng run dir */ |
906 | ret = chown(LTTNG_RUNDIR, 0, grp->gr_gid); | |
907 | if (ret < 0) { | |
908 | ERR("Unable to set group on " LTTNG_RUNDIR); | |
909 | perror("chown"); | |
910 | } | |
911 | ||
912 | /* lttng client socket path */ | |
fac6795d DG |
913 | ret = chown(client_unix_sock_path, 0, grp->gr_gid); |
914 | if (ret < 0) { | |
d6f42150 DG |
915 | ERR("Unable to set group on %s", client_unix_sock_path); |
916 | perror("chown"); | |
917 | } | |
918 | ||
919 | /* kconsumerd error socket path */ | |
920 | ret = chown(kconsumerd_err_unix_sock_path, 0, grp->gr_gid); | |
921 | if (ret < 0) { | |
922 | ERR("Unable to set group on %s", kconsumerd_err_unix_sock_path); | |
fac6795d DG |
923 | perror("chown"); |
924 | } | |
925 | ||
d6f42150 | 926 | DBG("All permissions are set"); |
e07ae692 | 927 | |
fac6795d DG |
928 | end: |
929 | return ret; | |
930 | } | |
931 | ||
d6f42150 DG |
932 | /* |
933 | * create_lttng_rundir | |
934 | * | |
935 | * Create the lttng run directory needed for all | |
936 | * global sockets and pipe. | |
937 | */ | |
938 | static int create_lttng_rundir(void) | |
939 | { | |
940 | int ret; | |
941 | ||
942 | ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG ); | |
943 | if (ret < 0) { | |
944 | ERR("Unable to create " LTTNG_RUNDIR); | |
945 | goto error; | |
946 | } | |
947 | ||
948 | error: | |
949 | return ret; | |
950 | } | |
951 | ||
952 | /* | |
953 | * set_kconsumerd_sockets | |
954 | * | |
955 | * Setup sockets and directory needed by the kconsumerd | |
956 | * communication with the session daemon. | |
957 | */ | |
958 | static int set_kconsumerd_sockets(void) | |
959 | { | |
960 | int ret; | |
961 | ||
962 | if (strlen(kconsumerd_err_unix_sock_path) == 0) { | |
963 | snprintf(kconsumerd_err_unix_sock_path, PATH_MAX, KCONSUMERD_ERR_SOCK_PATH); | |
964 | } | |
965 | ||
966 | if (strlen(kconsumerd_cmd_unix_sock_path) == 0) { | |
967 | snprintf(kconsumerd_cmd_unix_sock_path, PATH_MAX, KCONSUMERD_CMD_SOCK_PATH); | |
968 | } | |
969 | ||
970 | ret = mkdir(KCONSUMERD_PATH, S_IRWXU | S_IRWXG); | |
971 | if (ret < 0) { | |
972 | ERR("Failed to create " KCONSUMERD_PATH); | |
973 | goto error; | |
974 | } | |
975 | ||
976 | /* Create the kconsumerd error unix socket */ | |
977 | kconsumerd_err_sock = lttcomm_create_unix_sock(kconsumerd_err_unix_sock_path); | |
978 | if (kconsumerd_err_sock < 0) { | |
979 | ERR("Create unix sock failed: %s", kconsumerd_err_unix_sock_path); | |
980 | ret = -1; | |
981 | goto error; | |
982 | } | |
983 | ||
984 | /* File permission MUST be 660 */ | |
985 | ret = chmod(kconsumerd_err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
986 | if (ret < 0) { | |
987 | ERR("Set file permissions failed: %s", kconsumerd_err_unix_sock_path); | |
988 | perror("chmod"); | |
989 | goto error; | |
990 | } | |
991 | ||
992 | error: | |
993 | return ret; | |
994 | } | |
995 | ||
fac6795d | 996 | /* |
62bd06d8 | 997 | * set_signal_handler |
fac6795d | 998 | * |
62bd06d8 | 999 | * Setup signal handler for : |
fac6795d DG |
1000 | * SIGINT, SIGTERM, SIGPIPE |
1001 | */ | |
1002 | static int set_signal_handler(void) | |
1003 | { | |
1004 | int ret = 0; | |
1005 | struct sigaction sa; | |
1006 | sigset_t sigset; | |
1007 | ||
1008 | if ((ret = sigemptyset(&sigset)) < 0) { | |
1009 | perror("sigemptyset"); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | sa.sa_handler = sighandler; | |
1014 | sa.sa_mask = sigset; | |
1015 | sa.sa_flags = 0; | |
1016 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
1017 | perror("sigaction"); | |
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { | |
1022 | perror("sigaction"); | |
1023 | return ret; | |
1024 | } | |
1025 | ||
1026 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
1027 | perror("sigaction"); | |
1028 | return ret; | |
1029 | } | |
1030 | ||
e07ae692 DG |
1031 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
1032 | ||
fac6795d DG |
1033 | return ret; |
1034 | } | |
1035 | ||
1036 | /** | |
62bd06d8 | 1037 | * sighandler |
fac6795d | 1038 | * |
62bd06d8 | 1039 | * Signal handler for the daemon |
fac6795d DG |
1040 | */ |
1041 | static void sighandler(int sig) | |
1042 | { | |
1043 | switch (sig) { | |
1044 | case SIGPIPE: | |
e07ae692 | 1045 | DBG("SIGPIPE catched"); |
87378cf5 | 1046 | return; |
fac6795d | 1047 | case SIGINT: |
e07ae692 DG |
1048 | DBG("SIGINT catched"); |
1049 | cleanup(); | |
1050 | break; | |
fac6795d | 1051 | case SIGTERM: |
e07ae692 | 1052 | DBG("SIGTERM catched"); |
fac6795d | 1053 | cleanup(); |
686204ab | 1054 | break; |
fac6795d DG |
1055 | default: |
1056 | break; | |
1057 | } | |
1058 | ||
1059 | exit(EXIT_SUCCESS); | |
1060 | } | |
1061 | ||
1062 | /* | |
62bd06d8 | 1063 | * cleanup |
fac6795d | 1064 | * |
62bd06d8 | 1065 | * Cleanup the daemon on exit |
fac6795d DG |
1066 | */ |
1067 | static void cleanup() | |
1068 | { | |
d6f42150 DG |
1069 | int ret; |
1070 | char *cmd; | |
1071 | ||
e07ae692 DG |
1072 | DBG("Cleaning up"); |
1073 | ||
fac6795d | 1074 | /* <fun> */ |
b716ce68 DG |
1075 | MSG("\n%c[%d;%dm*** assert failed *** ==> %c[%dm", 27,1,31,27,0); |
1076 | MSG("%c[%d;%dmMatthew, BEET driven development works!%c[%dm",27,1,33,27,0); | |
fac6795d DG |
1077 | /* </fun> */ |
1078 | ||
1079 | unlink(client_unix_sock_path); | |
1080 | unlink(apps_unix_sock_path); | |
d6f42150 DG |
1081 | unlink(kconsumerd_err_unix_sock_path); |
1082 | ||
1083 | ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR); | |
1084 | if (ret < 0) { | |
1085 | ERR("asprintf failed. Something is really wrong!"); | |
1086 | } | |
1087 | ||
1088 | /* Remove lttng run directory */ | |
1089 | ret = system(cmd); | |
1090 | if (ret < 0) { | |
1091 | ERR("Unable to clean " LTTNG_RUNDIR); | |
1092 | } | |
fac6795d DG |
1093 | } |
1094 | ||
1095 | /* | |
1096 | * main | |
1097 | */ | |
1098 | int main(int argc, char **argv) | |
1099 | { | |
1100 | int i; | |
1101 | int ret = 0; | |
1102 | void *status; | |
1103 | pthread_t threads[2]; | |
1104 | ||
1105 | /* Parse arguments */ | |
1106 | progname = argv[0]; | |
1107 | if ((ret = parse_args(argc, argv) < 0)) { | |
1108 | goto error; | |
1109 | } | |
1110 | ||
1111 | /* Daemonize */ | |
1112 | if (opt_daemon) { | |
53094c05 DG |
1113 | ret = daemon(0, 0); |
1114 | if (ret < 0) { | |
1115 | perror("daemon"); | |
1116 | goto error; | |
1117 | } | |
fac6795d DG |
1118 | } |
1119 | ||
1120 | /* Check if daemon is UID = 0 */ | |
1121 | is_root = !getuid(); | |
1122 | ||
1123 | /* Set all sockets path */ | |
1124 | if (is_root) { | |
d6f42150 DG |
1125 | ret = create_lttng_rundir(); |
1126 | if (ret < 0) { | |
1127 | goto error; | |
1128 | } | |
1129 | ||
fac6795d | 1130 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
1131 | snprintf(apps_unix_sock_path, PATH_MAX, |
1132 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
1133 | } |
1134 | ||
1135 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
1136 | snprintf(client_unix_sock_path, PATH_MAX, |
1137 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
1138 | } | |
1139 | ||
1140 | ret = set_kconsumerd_sockets(); | |
1141 | if (ret < 0) { | |
1142 | goto error; | |
fac6795d DG |
1143 | } |
1144 | } else { | |
1145 | if (strlen(apps_unix_sock_path) == 0) { | |
d6f42150 DG |
1146 | snprintf(apps_unix_sock_path, PATH_MAX, |
1147 | DEFAULT_HOME_APPS_UNIX_SOCK, get_home_dir()); | |
fac6795d DG |
1148 | } |
1149 | ||
1150 | /* Set the cli tool unix socket path */ | |
1151 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
1152 | snprintf(client_unix_sock_path, PATH_MAX, |
1153 | DEFAULT_HOME_CLIENT_UNIX_SOCK, get_home_dir()); | |
fac6795d DG |
1154 | } |
1155 | } | |
1156 | ||
1157 | /* See if daemon already exist. If any of the two | |
1158 | * socket needed by the daemon are present, this test fails | |
1159 | */ | |
1160 | if ((ret = check_existing_daemon()) == 0) { | |
75462a81 | 1161 | ERR("Already running daemon.\n"); |
ab118b20 | 1162 | /* We do not goto error because we must not |
d6f42150 | 1163 | * cleanup() because a daemon is already running. |
ab118b20 DG |
1164 | */ |
1165 | return EXIT_FAILURE; | |
fac6795d DG |
1166 | } |
1167 | ||
1168 | if (set_signal_handler() < 0) { | |
1169 | goto error; | |
1170 | } | |
1171 | ||
d6f42150 | 1172 | /* Setup the needed unix socket */ |
fac6795d DG |
1173 | if (init_daemon_socket() < 0) { |
1174 | goto error; | |
1175 | } | |
1176 | ||
1177 | /* Set credentials to socket */ | |
d6f42150 | 1178 | if (is_root && (set_permissions() < 0)) { |
fac6795d DG |
1179 | goto error; |
1180 | } | |
1181 | ||
5b8719f5 DG |
1182 | /* Get parent pid if -S, --sig-parent is specified. */ |
1183 | if (opt_sig_parent) { | |
1184 | ppid = getppid(); | |
1185 | } | |
1186 | ||
fac6795d DG |
1187 | while (1) { |
1188 | /* Create thread to manage the client socket */ | |
1189 | ret = pthread_create(&threads[0], NULL, thread_manage_clients, (void *) NULL); | |
1190 | if (ret != 0) { | |
1191 | perror("pthread_create"); | |
1192 | goto error; | |
1193 | } | |
1194 | ||
1195 | /* Create thread to manage application socket */ | |
1196 | ret = pthread_create(&threads[1], NULL, thread_manage_apps, (void *) NULL); | |
1197 | if (ret != 0) { | |
1198 | perror("pthread_create"); | |
1199 | goto error; | |
1200 | } | |
1201 | ||
1202 | for (i = 0; i < 2; i++) { | |
1203 | ret = pthread_join(threads[i], &status); | |
1204 | if (ret != 0) { | |
1205 | perror("pthread_join"); | |
1206 | goto error; | |
1207 | } | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | cleanup(); | |
1212 | return 0; | |
1213 | ||
1214 | error: | |
1215 | cleanup(); | |
1216 | ||
1217 | return EXIT_FAILURE; | |
1218 | } |