Fix: ust: segfault on lttng start on filter bytecode copy
[lttng-tools.git] / src / bin / lttng-sessiond / sessiond-config.c
CommitLineData
e6142f2e 1/*
ab5be9fa 2 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
e6142f2e 3 *
ab5be9fa 4 * SPDX-License-Identifier: GPL-2.0-only
e6142f2e 5 *
e6142f2e
JG
6 */
7
a3bc3918 8#include "version.h"
e6142f2e 9#include "sessiond-config.h"
e6142f2e
JG
10#include "lttng-ust-ctl.h"
11#include <common/defaults.h>
12#include <limits.h>
e6142f2e
JG
13#include <ctype.h>
14#include <common/error.h>
15#include <common/utils.h>
edf4b93e 16#include <common/compat/errno.h>
e6142f2e
JG
17#include <common/compat/getenv.h>
18
19static
20struct sessiond_config sessiond_config_build_defaults = {
21 .quiet = false,
22 .verbose = 0,
23 .verbose_consumer = 0,
24
2288467f 25 .agent_tcp_port = { .begin = DEFAULT_AGENT_TCP_PORT_RANGE_BEGIN, .end = DEFAULT_AGENT_TCP_PORT_RANGE_END },
761ffce2
FD
26 .event_notifier_buffer_size_kernel = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
27 .event_notifier_buffer_size_userspace = DEFAULT_EVENT_NOTIFIER_ERROR_COUNT_MAP_SIZE,
e6142f2e
JG
28 .app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT,
29
30 .no_kernel = false,
31 .background = false,
32 .daemonize = false,
33 .sig_parent = false,
34
b53d4e59 35 .tracing_group_name.value = (char *) DEFAULT_TRACING_GROUP,
e6142f2e
JG
36 .kmod_probes_list.value = NULL,
37 .kmod_extra_probes_list.value = NULL,
38
39 .rundir.value = NULL,
40
41 .apps_unix_sock_path.value = NULL,
42 .client_unix_sock_path.value = NULL,
43 .wait_shm_path.value = NULL,
44 .health_unix_sock_path.value = NULL,
45 .lttng_ust_clock_plugin.value = NULL,
46 .pid_file_path.value = NULL,
47 .lock_file_path.value = NULL,
48 .agent_port_file_path.value = NULL,
49 .load_session_path.value = NULL,
50
51 .consumerd32_path.value = NULL,
52 .consumerd32_bin_path.value = NULL,
53 .consumerd32_lib_dir.value = NULL,
54 .consumerd32_err_unix_sock_path.value = NULL,
55 .consumerd32_cmd_unix_sock_path.value = NULL,
56
57 .consumerd64_path.value = NULL,
58 .consumerd64_bin_path.value = NULL,
59 .consumerd64_lib_dir.value = NULL,
60 .consumerd64_err_unix_sock_path.value = NULL,
61 .consumerd64_cmd_unix_sock_path.value = NULL,
62
63 .kconsumerd_path.value = NULL,
64 .kconsumerd_err_unix_sock_path.value = NULL,
65 .kconsumerd_cmd_unix_sock_path.value = NULL,
66};
67
68static
69void config_string_fini(struct config_string *str)
70{
71 config_string_set(str, NULL);
72}
73
74static
75void config_string_set_static(struct config_string *config_str,
76 const char *value)
77{
78 config_string_set(config_str, (char *) value);
79 config_str->should_free = false;
80}
81
82/* Only use for dynamically-allocated strings. */
e6142f2e
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83void config_string_set(struct config_string *config_str, char *value)
84{
a0377dfe 85 LTTNG_ASSERT(config_str);
e6142f2e
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86 if (config_str->should_free) {
87 free(config_str->value);
88 config_str->should_free = false;
89 }
90
91 config_str->should_free = !!value;
92 config_str->value = value;
93}
94
e6142f2e
JG
95int sessiond_config_apply_env_config(struct sessiond_config *config)
96{
97 int ret = 0;
98 const char *env_value;
99
100 env_value = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
101 if (env_value) {
102 char *endptr;
103 long int_val;
104
105 errno = 0;
106 int_val = strtoul(env_value, &endptr, 0);
107 if (errno != 0 || int_val > INT_MAX ||
108 (int_val < 0 && int_val != -1)) {
109 ERR("Invalid value \"%s\" used for \"%s\" environment variable",
110 env_value, DEFAULT_APP_SOCKET_TIMEOUT_ENV);
111 ret = -1;
112 goto end;
113 }
114
115 config->app_socket_timeout = int_val;
116 }
117
118 env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_BIN");
119 if (env_value) {
120 config_string_set_static(&config->consumerd32_bin_path,
121 env_value);
122 }
123 env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_BIN");
124 if (env_value) {
125 config_string_set_static(&config->consumerd64_bin_path,
126 env_value);
127 }
128
129 env_value = lttng_secure_getenv("LTTNG_CONSUMERD32_LIBDIR");
130 if (env_value) {
131 config_string_set_static(&config->consumerd32_lib_dir,
132 env_value);
133 }
134 env_value = lttng_secure_getenv("LTTNG_CONSUMERD64_LIBDIR");
135 if (env_value) {
136 config_string_set_static(&config->consumerd64_lib_dir,
137 env_value);
138 }
139
140 env_value = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
141 if (env_value) {
142 config_string_set_static(&config->lttng_ust_clock_plugin,
143 env_value);
144 }
145
146 env_value = lttng_secure_getenv(DEFAULT_LTTNG_KMOD_PROBES);
147 if (env_value) {
148 config_string_set_static(&config->kmod_probes_list,
149 env_value);
150 }
151
152 env_value = lttng_secure_getenv(DEFAULT_LTTNG_EXTRA_KMOD_PROBES);
153 if (env_value) {
154 config_string_set_static(&config->kmod_extra_probes_list,
155 env_value);
156 }
157end:
158 return ret;
159}
160
161static
162int config_set_paths_root(struct sessiond_config *config)
163{
164 int ret = 0;
165
166 config_string_set(&config->rundir, strdup(DEFAULT_LTTNG_RUNDIR));
167 if (!config->rundir.value) {
168 ERR("Failed to set rundir");
169 ret = -1;
170 goto end;
171 }
172
173 config_string_set_static(&config->apps_unix_sock_path,
174 DEFAULT_GLOBAL_APPS_UNIX_SOCK);
175 config_string_set_static(&config->client_unix_sock_path,
176 DEFAULT_GLOBAL_CLIENT_UNIX_SOCK);
177 config_string_set_static(&config->wait_shm_path,
178 DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH);
179 config_string_set_static(&config->health_unix_sock_path,
180 DEFAULT_GLOBAL_HEALTH_UNIX_SOCK);
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181end:
182 return ret;
183}
184
185static
186int config_set_paths_non_root(struct sessiond_config *config)
187{
188 int ret = 0;
189 const char *home_path = utils_get_home_dir();
190 char *str;
191
192 if (home_path == NULL) {
193 ERR("Can't get HOME directory for sockets creation.");
194 ret = -1;
195 goto end;
196 }
197
198 /*
199 * Create rundir from home path. This will create something like
200 * $HOME/.lttng
201 */
202 ret = asprintf(&str, DEFAULT_LTTNG_HOME_RUNDIR, home_path);
203 if (ret < 0) {
204 ERR("Failed to set rundir");
205 goto end;
206 }
207 config_string_set(&config->rundir, str);
208 str = NULL;
209
210 ret = asprintf(&str, DEFAULT_HOME_APPS_UNIX_SOCK, home_path);
211 if (ret < 0) {
212 ERR("Failed to set default home apps unix socket path");
213 goto end;
214 }
215 config_string_set(&config->apps_unix_sock_path, str);
216 str = NULL;
217
218 ret = asprintf(&str, DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path);
219 if (ret < 0) {
220 ERR("Failed to set default home client unix socket path");
221 goto end;
222 }
223 config_string_set(&config->client_unix_sock_path, str);
224 str = NULL;
225
226 ret = asprintf(&str, DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid());
227 if (ret < 0) {
228 ERR("Failed to set default home apps wait shm path");
229 goto end;
230 }
231 config_string_set(&config->wait_shm_path, str);
232 str = NULL;
233
234 ret = asprintf(&str, DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path);
235 if (ret < 0) {
236 ERR("Failed to set default home health UNIX socket path");
237 goto end;
238 }
239 config_string_set(&config->health_unix_sock_path, str);
240 str = NULL;
241
242 ret = 0;
243end:
244 return ret;
245}
246
e6142f2e
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247int sessiond_config_init(struct sessiond_config *config)
248{
249 int ret;
250 bool is_root = (getuid() == 0);
251 char *str;
252
a0377dfe 253 LTTNG_ASSERT(config);
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254 memcpy(config, &sessiond_config_build_defaults, sizeof(*config));
255
256 if (is_root) {
257 ret = config_set_paths_root(config);
258 } else {
259 ret = config_set_paths_non_root(config);
260 }
2a9f757b 261 if (ret < 0) {
c9a2957d 262 goto error;
2a9f757b 263 }
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264
265 /* 32 bits consumerd path setup */
266 ret = asprintf(&str, DEFAULT_USTCONSUMERD32_PATH,
267 config->rundir.value);
268 if (ret < 0) {
269 ERR("Failed to set 32-bit consumer path");
c9a2957d 270 goto error;
e6142f2e
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271 }
272 config_string_set(&config->consumerd32_path, str);
273 str = NULL;
274
275 ret = asprintf(&str, DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH,
276 config->rundir.value);
277 if (ret < 0) {
278 ERR("Failed to set 32-bit consumer error socket path");
c9a2957d 279 goto error;
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280 }
281 config_string_set(&config->consumerd32_err_unix_sock_path, str);
282 str = NULL;
283
284 ret = asprintf(&str, DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH,
285 config->rundir.value);
286 if (ret < 0) {
287 ERR("Failed to set 32-bit consumer command socket path");
c9a2957d 288 goto error;
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289 }
290 config_string_set(&config->consumerd32_cmd_unix_sock_path, str);
291 str = NULL;
292
293 /* 64 bits consumerd path setup */
294 ret = asprintf(&str, DEFAULT_USTCONSUMERD64_PATH,
295 config->rundir.value);
296 if (ret < 0) {
297 ERR("Failed to set 64-bit consumer path");
c9a2957d 298 goto error;
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299 }
300 config_string_set(&config->consumerd64_path, str);
301 str = NULL;
302
303 ret = asprintf(&str, DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH,
304 config->rundir.value);
305 if (ret < 0) {
306 ERR("Failed to set 64-bit consumer error socket path");
c9a2957d 307 goto error;
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308 }
309 config_string_set(&config->consumerd64_err_unix_sock_path, str);
310 str = NULL;
311
312 ret = asprintf(&str, DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH,
313 config->rundir.value);
314 if (ret < 0) {
315 ERR("Failed to set 64-bit consumer command socket path");
c9a2957d 316 goto error;
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317 }
318 config_string_set(&config->consumerd64_cmd_unix_sock_path, str);
319 str = NULL;
320
321 /* kconsumerd consumerd path setup */
322 ret = asprintf(&str, DEFAULT_KCONSUMERD_PATH,
323 config->rundir.value);
324 if (ret < 0) {
325 ERR("Failed to set kernel consumer path");
c9a2957d 326 goto error;
e6142f2e
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327 }
328 config_string_set(&config->kconsumerd_path, str);
329 str = NULL;
330
4a08b740
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331 ret = asprintf(&str, DEFAULT_KCONSUMERD_ERR_SOCK_PATH,
332 config->rundir.value);
333 if (ret < 0) {
334 ERR("Failed to set kernel consumer error socket path");
c9a2957d 335 goto error;
4a08b740
JG
336 }
337 config_string_set(&config->kconsumerd_err_unix_sock_path, str);
338 str = NULL;
339
340 ret = asprintf(&str, DEFAULT_KCONSUMERD_CMD_SOCK_PATH,
341 config->rundir.value);
342 if (ret < 0) {
343 ERR("Failed to set kernel consumer command socket path");
c9a2957d 344 goto error;
4a08b740
JG
345 }
346 config_string_set(&config->kconsumerd_cmd_unix_sock_path, str);
347 str = NULL;
348
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349 ret = asprintf(&str, "%s/%s", config->rundir.value,
350 DEFAULT_LTTNG_SESSIOND_PIDFILE);
351 if (ret < 0) {
352 ERR("Failed to set PID file path");
c9a2957d 353 goto error;
e6142f2e
JG
354 }
355 config_string_set(&config->pid_file_path, str);
356 str = NULL;
357
358 ret = asprintf(&str, "%s/%s", config->rundir.value,
359 DEFAULT_LTTNG_SESSIOND_LOCKFILE);
360 if (ret < 0) {
361 ERR("Failed to set lock file path");
c9a2957d 362 goto error;
e6142f2e
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363 }
364 config_string_set(&config->lock_file_path, str);
365 str = NULL;
366
367 ret = asprintf(&str, "%s/%s", config->rundir.value,
368 DEFAULT_LTTNG_SESSIOND_AGENTPORT_FILE);
369 if (ret < 0) {
370 ERR("Failed to set agent port file path");
c9a2957d 371 goto error;
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372 }
373 config_string_set(&config->agent_port_file_path, str);
374 str = NULL;
375
376 /*
377 * Allow INSTALL_BIN_PATH to be used as a target path for the
378 * native architecture size consumer if CONFIG_CONSUMER*_PATH
379 * has not been defined.
380 */
381#if (CAA_BITS_PER_LONG == 32)
382 config_string_set_static(&config->consumerd32_bin_path,
383 INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
384 config_string_set_static(&config->consumerd32_lib_dir,
385 INSTALL_LIB_PATH);
386#elif (CAA_BITS_PER_LONG == 64)
387 config_string_set_static(&config->consumerd64_bin_path,
388 INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE);
389 config_string_set_static(&config->consumerd64_lib_dir,
390 INSTALL_LIB_PATH);
391#else
392#error "Unknown bitness"
393#endif
394 ret = 0;
c9a2957d
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395 return ret;
396error:
397 sessiond_config_fini(config);
e6142f2e
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398 return ret;
399}
400
e6142f2e
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401void sessiond_config_fini(struct sessiond_config *config)
402{
403 config_string_fini(&config->tracing_group_name);
404 config_string_fini(&config->kmod_probes_list);
405 config_string_fini(&config->kmod_extra_probes_list);
16ffecdb 406 config_string_fini(&config->rundir);
e6142f2e
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407 config_string_fini(&config->apps_unix_sock_path);
408 config_string_fini(&config->client_unix_sock_path);
409 config_string_fini(&config->wait_shm_path);
410 config_string_fini(&config->health_unix_sock_path);
411 config_string_fini(&config->lttng_ust_clock_plugin);
412 config_string_fini(&config->pid_file_path);
413 config_string_fini(&config->lock_file_path);
414 config_string_fini(&config->load_session_path);
415 config_string_fini(&config->agent_port_file_path);
416 config_string_fini(&config->consumerd32_path);
417 config_string_fini(&config->consumerd32_bin_path);
418 config_string_fini(&config->consumerd32_lib_dir);
419 config_string_fini(&config->consumerd32_err_unix_sock_path);
420 config_string_fini(&config->consumerd32_cmd_unix_sock_path);
421 config_string_fini(&config->consumerd64_path);
422 config_string_fini(&config->consumerd64_bin_path);
423 config_string_fini(&config->consumerd64_lib_dir);
424 config_string_fini(&config->consumerd64_err_unix_sock_path);
425 config_string_fini(&config->consumerd64_cmd_unix_sock_path);
426 config_string_fini(&config->kconsumerd_path);
427 config_string_fini(&config->kconsumerd_err_unix_sock_path);
428 config_string_fini(&config->kconsumerd_cmd_unix_sock_path);
429}
430
431static
432int resolve_path(struct config_string *path)
433{
434 int ret = 0;
435 char *absolute_path;
436
437 if (!path->value || path->value[0] == '/') {
438 goto end;
439 }
440
441 absolute_path = utils_expand_path(path->value);
442 if (!absolute_path) {
443 ret = -1;
444 goto end;
445 }
446
447 config_string_set(path, absolute_path);
448end:
449 return ret;
450}
451
452#define RESOLVE_CHECK(path_config_str) \
453 if (resolve_path(path_config_str)) \
454 return -1
455
e6142f2e
JG
456int sessiond_config_resolve_paths(struct sessiond_config *config)
457{
458 RESOLVE_CHECK(&config->apps_unix_sock_path);
459 RESOLVE_CHECK(&config->client_unix_sock_path);
460 RESOLVE_CHECK(&config->wait_shm_path);
461 RESOLVE_CHECK(&config->health_unix_sock_path);
462 RESOLVE_CHECK(&config->lttng_ust_clock_plugin);
463 RESOLVE_CHECK(&config->pid_file_path);
464 RESOLVE_CHECK(&config->lock_file_path);
465 RESOLVE_CHECK(&config->load_session_path);
466 RESOLVE_CHECK(&config->agent_port_file_path);
467 RESOLVE_CHECK(&config->consumerd32_path);
468 RESOLVE_CHECK(&config->consumerd32_bin_path);
469 RESOLVE_CHECK(&config->consumerd32_lib_dir);
470 RESOLVE_CHECK(&config->consumerd32_err_unix_sock_path);
471 RESOLVE_CHECK(&config->consumerd32_cmd_unix_sock_path);
472 RESOLVE_CHECK(&config->consumerd64_path);
473 RESOLVE_CHECK(&config->consumerd64_bin_path);
474 RESOLVE_CHECK(&config->consumerd64_lib_dir);
475 RESOLVE_CHECK(&config->consumerd64_err_unix_sock_path);
476 RESOLVE_CHECK(&config->consumerd64_cmd_unix_sock_path);
477 RESOLVE_CHECK(&config->kconsumerd_path);
478 RESOLVE_CHECK(&config->kconsumerd_err_unix_sock_path);
479 RESOLVE_CHECK(&config->kconsumerd_cmd_unix_sock_path);
480 return 0;
481}
482
e6142f2e
JG
483void sessiond_config_log(struct sessiond_config *config)
484{
485 DBG_NO_LOC("[sessiond configuration]");
a3bc3918
JR
486 DBG_NO_LOC("\tversion %s", VERSION);
487 if (GIT_VERSION[0] != '\0') {
488 DBG_NO_LOC("\tgit version %s", GIT_VERSION);
489 }
490 if (EXTRA_VERSION_NAME[0] != '\0') {
491 DBG_NO_LOC("\textra version name %s", EXTRA_VERSION_NAME);
492 }
493 if (EXTRA_VERSION_DESCRIPTION[0] != '\0') {
494 DBG_NO_LOC("\textra version description:\n\t%s", EXTRA_VERSION_DESCRIPTION);
495 }
7f5ed73a
JR
496 if (EXTRA_VERSION_PATCHES[0] != '\0') {
497 DBG_NO_LOC("\textra version patches:\n\t%s", EXTRA_VERSION_PATCHES);
498 }
2ca43cb1
JR
499 DBG_NO_LOC("\tverbose: %i", config->verbose);
500 DBG_NO_LOC("\tverbose consumer: %i", config->verbose_consumer);
501 DBG_NO_LOC("\tquiet mode: %s", config->quiet ? "True" : "False");
2288467f 502 if (config->agent_tcp_port.begin == config->agent_tcp_port.end) {
2ca43cb1 503 DBG_NO_LOC("\tagent_tcp_port: %i", config->agent_tcp_port.begin);
2288467f 504 } else {
2ca43cb1 505 DBG_NO_LOC("\tagent_tcp_port: [%i, %i]",
2288467f
JG
506 config->agent_tcp_port.begin,
507 config->agent_tcp_port.end);
508 }
2ca43cb1
JR
509 DBG_NO_LOC("\tapplication socket timeout: %i", config->app_socket_timeout);
510 DBG_NO_LOC("\tno-kernel: %s", config->no_kernel ? "True" : "False");
511 DBG_NO_LOC("\tbackground: %s", config->background ? "True" : "False");
512 DBG_NO_LOC("\tdaemonize: %s", config->daemonize ? "True" : "False");
513 DBG_NO_LOC("\tsignal parent on start: %s", config->sig_parent ? "True" : "False");
514 DBG_NO_LOC("\ttracing group name: %s", config->tracing_group_name.value ? : "Unknown");
515 DBG_NO_LOC("\tkmod_probe_list: %s", config->kmod_probes_list.value ? : "None");
516 DBG_NO_LOC("\tkmod_extra_probe_list: %s", config->kmod_extra_probes_list.value ? : "None");
517 DBG_NO_LOC("\trundir: %s", config->rundir.value ? : "Unknown");
518 DBG_NO_LOC("\tapplication socket path: %s", config->apps_unix_sock_path.value ? : "Unknown");
519 DBG_NO_LOC("\tclient socket path: %s", config->client_unix_sock_path.value ? : "Unknown");
520 DBG_NO_LOC("\twait shm path: %s", config->wait_shm_path.value ? : "Unknown");
521 DBG_NO_LOC("\thealth socket path: %s", config->health_unix_sock_path.value ? : "Unknown");
522 DBG_NO_LOC("\tLTTNG_UST_CLOCK_PLUGIN: %s", config->lttng_ust_clock_plugin.value ? : "None");
523 DBG_NO_LOC("\tpid file path: %s", config->pid_file_path.value ? : "Unknown");
524 DBG_NO_LOC("\tlock file path: %s", config->lock_file_path.value ? : "Unknown");
525 DBG_NO_LOC("\tsession load path: %s", config->load_session_path.value ? : "None");
526 DBG_NO_LOC("\tagent port file path: %s", config->agent_port_file_path.value ? : "Unknown");
527 DBG_NO_LOC("\tconsumerd32 path: %s", config->consumerd32_path.value ? : "Unknown");
528 DBG_NO_LOC("\tconsumerd32 bin path: %s", config->consumerd32_bin_path.value ? : "Unknown");
529 DBG_NO_LOC("\tconsumerd32 lib dir: %s", config->consumerd32_lib_dir.value ? : "Unknown");
530 DBG_NO_LOC("\tconsumerd32 err unix sock path:%s", config->consumerd32_err_unix_sock_path.value ? : "Unknown");
531 DBG_NO_LOC("\tconsumerd32 cmd unix sock path:%s", config->consumerd32_cmd_unix_sock_path.value ? : "Unknown");
532 DBG_NO_LOC("\tconsumerd64 path: %s", config->consumerd64_path.value ? : "Unknown");
533 DBG_NO_LOC("\tconsumerd64 bin path: %s", config->consumerd64_bin_path.value ? : "Unknown");
534 DBG_NO_LOC("\tconsumerd64 lib dir: %s", config->consumerd64_lib_dir.value ? : "Unknown");
535 DBG_NO_LOC("\tconsumerd64 err unix sock path:%s", config->consumerd64_err_unix_sock_path.value ? : "Unknown");
536 DBG_NO_LOC("\tconsumerd64 cmd unix sock path:%s", config->consumerd64_cmd_unix_sock_path.value ? : "Unknown");
537 DBG_NO_LOC("\tkconsumerd path: %s", config->kconsumerd_path.value ? : "Unknown");
538 DBG_NO_LOC("\tkconsumerd err unix sock path: %s", config->kconsumerd_err_unix_sock_path.value ? : "Unknown");
539 DBG_NO_LOC("\tkconsumerd cmd unix sock path: %s", config->kconsumerd_cmd_unix_sock_path.value ? : "Unknown");
e6142f2e 540}
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