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acddc0ed | 1 | // SPDX-License-Identifier: ISC |
0bdeb5e5 DL |
2 | /* |
3 | * Copyright (c) 2015-19 David Lamparter, for NetDEF, Inc. | |
0bdeb5e5 DL |
4 | */ |
5 | ||
6 | #include "zebra.h" | |
7 | ||
8 | #include <sys/un.h> | |
9 | #include <syslog.h> | |
10 | ||
11 | #include "memory.h" | |
12 | #include "frrcu.h" | |
13 | #include "frr_pthread.h" | |
14 | #include "printfrr.h" | |
15 | #include "zlog.h" | |
16 | #include "zlog_targets.h" | |
17 | ||
767439c5 DL |
18 | /* these allocations are intentionally left active even when doing full exit |
19 | * cleanup, in order to keep the logging subsystem fully functional until the | |
20 | * absolute end. | |
21 | */ | |
22 | ||
bf8d3d6a | 23 | DEFINE_MGROUP_ACTIVEATEXIT(LOG, "logging subsystem"); |
767439c5 | 24 | |
bf8d3d6a DL |
25 | DEFINE_MTYPE_STATIC(LOG, LOG_FD, "log file target"); |
26 | DEFINE_MTYPE_STATIC(LOG, LOG_FD_NAME, "log file name"); | |
27 | DEFINE_MTYPE_STATIC(LOG, LOG_FD_ROTATE, "log file rotate helper"); | |
28 | DEFINE_MTYPE_STATIC(LOG, LOG_SYSL, "syslog target"); | |
0bdeb5e5 DL |
29 | |
30 | struct zlt_fd { | |
31 | struct zlog_target zt; | |
32 | ||
33 | atomic_uint_fast32_t fd; | |
34 | ||
35 | char ts_subsec; | |
36 | bool record_priority; | |
37 | ||
38 | struct rcu_head_close head_close; | |
39 | }; | |
40 | ||
41 | static const char * const prionames[] = { | |
42 | [LOG_EMERG] = "emergencies: ", | |
43 | [LOG_ALERT] = "alerts: ", | |
44 | [LOG_CRIT] = "critical: ", | |
45 | [LOG_ERR] = "errors: ", | |
46 | [LOG_WARNING] = "warnings: ", | |
47 | [LOG_NOTICE] = "notifications: ", | |
48 | [LOG_INFO] = "informational: ", | |
49 | [LOG_DEBUG] = "debugging: ", | |
50 | }; | |
51 | ||
1c408628 | 52 | void zlog_fd(struct zlog_target *zt, struct zlog_msg *msgs[], size_t nmsgs) |
0bdeb5e5 DL |
53 | { |
54 | struct zlt_fd *zte = container_of(zt, struct zlt_fd, zt); | |
55 | int fd; | |
56 | size_t i, textlen, iovpos = 0; | |
57 | size_t niov = MIN(4 * nmsgs + 1, IOV_MAX); | |
58 | struct iovec iov[niov]; | |
59 | /* "\nYYYY-MM-DD HH:MM:SS.NNNNNNNNN+ZZ:ZZ " = 37 chars */ | |
60 | #define TS_LEN 40 | |
61 | char ts_buf[TS_LEN * nmsgs], *ts_pos = ts_buf; | |
62 | ||
63 | fd = atomic_load_explicit(&zte->fd, memory_order_relaxed); | |
64 | ||
65 | for (i = 0; i < nmsgs; i++) { | |
66 | struct zlog_msg *msg = msgs[i]; | |
67 | int prio = zlog_msg_prio(msg); | |
68 | ||
db2baed1 | 69 | if (prio <= zt->prio_min) { |
f6caaa65 DL |
70 | struct fbuf fbuf = { |
71 | .buf = ts_buf, | |
72 | .pos = ts_pos, | |
73 | .len = sizeof(ts_buf), | |
74 | }; | |
8b94cb43 DL |
75 | |
76 | iov[iovpos].iov_base = ts_pos; | |
f6caaa65 DL |
77 | zlog_msg_ts(msg, &fbuf, |
78 | ZLOG_TS_LEGACY | zte->ts_subsec); | |
79 | ts_pos = fbuf.pos; | |
80 | ||
db2baed1 DL |
81 | *ts_pos++ = ' '; |
82 | iov[iovpos].iov_len = | |
83 | ts_pos - (char *)iov[iovpos].iov_base; | |
0bdeb5e5 | 84 | |
db2baed1 | 85 | iovpos++; |
0bdeb5e5 | 86 | |
db2baed1 DL |
87 | if (zte->record_priority) { |
88 | iov[iovpos].iov_base = (char *)prionames[prio]; | |
89 | iov[iovpos].iov_len = | |
90 | strlen(iov[iovpos].iov_base); | |
0bdeb5e5 | 91 | |
db2baed1 DL |
92 | iovpos++; |
93 | } | |
0bdeb5e5 | 94 | |
db2baed1 DL |
95 | iov[iovpos].iov_base = zlog_prefix; |
96 | iov[iovpos].iov_len = zlog_prefixsz; | |
0bdeb5e5 | 97 | |
db2baed1 | 98 | iovpos++; |
0bdeb5e5 | 99 | |
db2baed1 DL |
100 | iov[iovpos].iov_base = |
101 | (char *)zlog_msg_text(msg, &textlen); | |
8b94cb43 | 102 | iov[iovpos].iov_len = textlen + 1; |
0bdeb5e5 | 103 | |
db2baed1 DL |
104 | iovpos++; |
105 | } | |
0bdeb5e5 | 106 | |
db2baed1 DL |
107 | /* conditions that trigger writing: |
108 | * - out of space for more timestamps/headers | |
109 | * - this being the last message in the batch | |
110 | * - not enough remaining iov entries | |
111 | */ | |
112 | if (iovpos > 0 && (ts_buf + sizeof(ts_buf) - ts_pos < TS_LEN | |
113 | || i + 1 == nmsgs | |
114 | || array_size(iov) - iovpos < 5)) { | |
0bdeb5e5 DL |
115 | writev(fd, iov, iovpos); |
116 | ||
117 | iovpos = 0; | |
118 | ts_pos = ts_buf; | |
119 | } | |
120 | } | |
121 | ||
122 | assert(iovpos == 0); | |
123 | } | |
124 | ||
125 | static void zlog_fd_sigsafe(struct zlog_target *zt, const char *text, | |
126 | size_t len) | |
127 | { | |
128 | struct zlt_fd *zte = container_of(zt, struct zlt_fd, zt); | |
129 | struct iovec iov[4]; | |
130 | int fd; | |
131 | ||
132 | iov[0].iov_base = (char *)prionames[LOG_CRIT]; | |
133 | iov[0].iov_len = zte->record_priority ? strlen(iov[0].iov_base) : 0; | |
134 | ||
135 | iov[1].iov_base = zlog_prefix; | |
136 | iov[1].iov_len = zlog_prefixsz; | |
137 | ||
138 | iov[2].iov_base = (char *)text; | |
139 | iov[2].iov_len = len; | |
140 | ||
141 | iov[3].iov_base = (char *)"\n"; | |
142 | iov[3].iov_len = 1; | |
143 | ||
144 | fd = atomic_load_explicit(&zte->fd, memory_order_relaxed); | |
145 | ||
146 | writev(fd, iov, array_size(iov)); | |
147 | } | |
148 | ||
149 | /* | |
150 | * (re-)configuration | |
151 | */ | |
152 | ||
153 | void zlog_file_init(struct zlog_cfg_file *zcf) | |
154 | { | |
155 | memset(zcf, 0, sizeof(*zcf)); | |
156 | zcf->prio_min = ZLOG_DISABLED; | |
157 | zcf->fd = -1; | |
158 | pthread_mutex_init(&zcf->cfg_mtx, NULL); | |
159 | } | |
160 | ||
161 | static void zlog_file_target_free(struct zlt_fd *zlt) | |
162 | { | |
163 | if (!zlt) | |
164 | return; | |
165 | ||
166 | rcu_close(&zlt->head_close, zlt->fd); | |
167 | rcu_free(MTYPE_LOG_FD, zlt, zt.rcu_head); | |
168 | } | |
169 | ||
170 | void zlog_file_fini(struct zlog_cfg_file *zcf) | |
171 | { | |
172 | if (zcf->active) { | |
173 | struct zlt_fd *ztf; | |
174 | struct zlog_target *zt; | |
175 | ||
176 | zt = zlog_target_replace(&zcf->active->zt, NULL); | |
177 | ztf = container_of(zt, struct zlt_fd, zt); | |
178 | zlog_file_target_free(ztf); | |
179 | } | |
180 | XFREE(MTYPE_LOG_FD_NAME, zcf->filename); | |
181 | pthread_mutex_destroy(&zcf->cfg_mtx); | |
182 | } | |
183 | ||
184 | static bool zlog_file_cycle(struct zlog_cfg_file *zcf) | |
185 | { | |
186 | struct zlog_target *zt, *old; | |
187 | struct zlt_fd *zlt = NULL; | |
188 | int fd; | |
189 | bool rv = true; | |
190 | ||
191 | do { | |
192 | if (zcf->prio_min == ZLOG_DISABLED) | |
193 | break; | |
194 | ||
195 | if (zcf->fd != -1) | |
196 | fd = dup(zcf->fd); | |
197 | else if (zcf->filename) | |
198 | fd = open(zcf->filename, | |
199 | O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC | |
200 | | O_NOCTTY, | |
201 | LOGFILE_MASK); | |
202 | else | |
203 | fd = -1; | |
204 | ||
205 | if (fd < 0) { | |
206 | rv = false; | |
207 | break; | |
208 | } | |
209 | ||
210 | zt = zlog_target_clone(MTYPE_LOG_FD, &zcf->active->zt, | |
211 | sizeof(*zlt)); | |
212 | zlt = container_of(zt, struct zlt_fd, zt); | |
213 | ||
214 | zlt->fd = fd; | |
215 | zlt->record_priority = zcf->record_priority; | |
216 | zlt->ts_subsec = zcf->ts_subsec; | |
217 | ||
218 | zlt->zt.prio_min = zcf->prio_min; | |
1c408628 | 219 | zlt->zt.logfn = zcf->zlog_wrap ? zcf->zlog_wrap : zlog_fd; |
0bdeb5e5 DL |
220 | zlt->zt.logfn_sigsafe = zlog_fd_sigsafe; |
221 | } while (0); | |
222 | ||
589b5e48 QY |
223 | old = zlog_target_replace(zcf->active ? &zcf->active->zt : NULL, |
224 | zlt ? &zlt->zt : NULL); | |
0bdeb5e5 DL |
225 | zcf->active = zlt; |
226 | ||
589b5e48 | 227 | zlog_file_target_free(container_of_null(old, struct zlt_fd, zt)); |
0bdeb5e5 DL |
228 | |
229 | return rv; | |
230 | } | |
231 | ||
232 | void zlog_file_set_other(struct zlog_cfg_file *zcf) | |
233 | { | |
cb1991af | 234 | frr_with_mutex (&zcf->cfg_mtx) { |
0bdeb5e5 DL |
235 | zlog_file_cycle(zcf); |
236 | } | |
237 | } | |
238 | ||
239 | bool zlog_file_set_filename(struct zlog_cfg_file *zcf, const char *filename) | |
240 | { | |
cb1991af | 241 | frr_with_mutex (&zcf->cfg_mtx) { |
0bdeb5e5 DL |
242 | XFREE(MTYPE_LOG_FD_NAME, zcf->filename); |
243 | zcf->filename = XSTRDUP(MTYPE_LOG_FD_NAME, filename); | |
244 | zcf->fd = -1; | |
245 | ||
246 | return zlog_file_cycle(zcf); | |
247 | } | |
248 | assert(0); | |
16c150f2 | 249 | return false; |
0bdeb5e5 DL |
250 | } |
251 | ||
252 | bool zlog_file_set_fd(struct zlog_cfg_file *zcf, int fd) | |
253 | { | |
cb1991af | 254 | frr_with_mutex (&zcf->cfg_mtx) { |
0bdeb5e5 DL |
255 | if (zcf->fd == fd) |
256 | return true; | |
257 | ||
258 | XFREE(MTYPE_LOG_FD_NAME, zcf->filename); | |
259 | zcf->fd = fd; | |
260 | ||
261 | return zlog_file_cycle(zcf); | |
262 | } | |
263 | assert(0); | |
16c150f2 | 264 | return false; |
0bdeb5e5 DL |
265 | } |
266 | ||
267 | struct rcu_close_rotate { | |
268 | struct rcu_head_close head_close; | |
269 | struct rcu_head head_self; | |
270 | }; | |
271 | ||
272 | bool zlog_file_rotate(struct zlog_cfg_file *zcf) | |
273 | { | |
274 | struct rcu_close_rotate *rcr; | |
275 | int fd; | |
276 | ||
cb1991af | 277 | frr_with_mutex (&zcf->cfg_mtx) { |
0bdeb5e5 DL |
278 | if (!zcf->active || !zcf->filename) |
279 | return true; | |
280 | ||
281 | fd = open(zcf->filename, | |
282 | O_WRONLY | O_APPEND | O_CREAT | O_CLOEXEC | O_NOCTTY, | |
283 | LOGFILE_MASK); | |
284 | if (fd < 0) | |
285 | return false; | |
286 | ||
287 | fd = atomic_exchange_explicit(&zcf->active->fd, | |
288 | (uint_fast32_t)fd, | |
289 | memory_order_relaxed); | |
290 | } | |
291 | ||
292 | rcr = XCALLOC(MTYPE_LOG_FD_ROTATE, sizeof(*rcr)); | |
293 | rcu_close(&rcr->head_close, fd); | |
294 | rcu_free(MTYPE_LOG_FD_ROTATE, rcr, head_self); | |
295 | ||
296 | return true; | |
297 | } | |
298 | ||
299 | /* fixed crash logging */ | |
300 | ||
301 | static struct zlt_fd zlog_crashlog; | |
302 | ||
303 | static void zlog_crashlog_sigsafe(struct zlog_target *zt, const char *text, | |
304 | size_t len) | |
305 | { | |
306 | static int crashlog_fd = -1; | |
307 | ||
308 | if (crashlog_fd == -1) { | |
309 | #ifdef HAVE_OPENAT | |
310 | crashlog_fd = openat(zlog_tmpdirfd, "crashlog", | |
311 | O_WRONLY | O_APPEND | O_CREAT, | |
312 | LOGFILE_MASK); | |
313 | #endif | |
314 | if (crashlog_fd < 0) | |
315 | crashlog_fd = -2; | |
316 | } | |
317 | ||
318 | if (crashlog_fd == -2) | |
319 | return; | |
320 | ||
321 | zlog_crashlog.fd = crashlog_fd; | |
322 | zlog_fd_sigsafe(&zlog_crashlog.zt, text, len); | |
323 | } | |
324 | ||
325 | /* this is used for assert failures (they don't need AS-Safe logging) */ | |
326 | static void zlog_crashlog_plain(struct zlog_target *zt, struct zlog_msg *msgs[], | |
327 | size_t nmsgs) | |
328 | { | |
329 | size_t i, len; | |
330 | const char *text; | |
331 | ||
332 | for (i = 0; i < nmsgs; i++) { | |
333 | if (zlog_msg_prio(msgs[i]) > zt->prio_min) | |
334 | continue; | |
335 | ||
336 | text = zlog_msg_text(msgs[i], &len); | |
337 | zlog_crashlog_sigsafe(zt, text, len); | |
338 | } | |
339 | } | |
340 | ||
341 | static void zlog_crashlog_init(void) | |
342 | { | |
343 | zlog_crashlog.zt.prio_min = LOG_CRIT; | |
344 | zlog_crashlog.zt.logfn = zlog_crashlog_plain; | |
345 | zlog_crashlog.zt.logfn_sigsafe = zlog_crashlog_sigsafe; | |
346 | zlog_crashlog.fd = -1; | |
347 | ||
348 | zlog_target_replace(NULL, &zlog_crashlog.zt); | |
349 | } | |
350 | ||
351 | /* fixed logging for test/auxiliary programs */ | |
352 | ||
353 | static struct zlt_fd zlog_aux_stdout; | |
354 | static bool zlog_is_aux; | |
355 | ||
356 | static int zlt_aux_init(const char *prefix, int prio_min) | |
357 | { | |
358 | zlog_is_aux = true; | |
359 | ||
360 | zlog_aux_stdout.zt.prio_min = prio_min; | |
361 | zlog_aux_stdout.zt.logfn = zlog_fd; | |
362 | zlog_aux_stdout.zt.logfn_sigsafe = zlog_fd_sigsafe; | |
363 | zlog_aux_stdout.fd = STDOUT_FILENO; | |
364 | ||
365 | zlog_target_replace(NULL, &zlog_aux_stdout.zt); | |
366 | zlog_startup_end(); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static int zlt_init(const char *progname, const char *protoname, | |
371 | unsigned short instance, uid_t uid, gid_t gid) | |
372 | { | |
373 | openlog(progname, LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | static int zlt_fini(void) | |
378 | { | |
379 | closelog(); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* fixed startup logging to stderr */ | |
384 | ||
385 | static struct zlt_fd zlog_startup_stderr; | |
386 | ||
387 | __attribute__((_CONSTRUCTOR(450))) static void zlog_startup_init(void) | |
388 | { | |
389 | zlog_startup_stderr.zt.prio_min = LOG_WARNING; | |
390 | zlog_startup_stderr.zt.logfn = zlog_fd; | |
391 | zlog_startup_stderr.zt.logfn_sigsafe = zlog_fd_sigsafe; | |
392 | zlog_startup_stderr.fd = STDERR_FILENO; | |
393 | ||
394 | zlog_target_replace(NULL, &zlog_startup_stderr.zt); | |
395 | ||
396 | hook_register(zlog_aux_init, zlt_aux_init); | |
397 | hook_register(zlog_init, zlt_init); | |
398 | hook_register(zlog_fini, zlt_fini); | |
399 | } | |
400 | ||
401 | void zlog_startup_end(void) | |
402 | { | |
403 | static bool startup_ended = false; | |
404 | ||
405 | if (startup_ended) | |
406 | return; | |
407 | startup_ended = true; | |
408 | ||
409 | zlog_target_replace(&zlog_startup_stderr.zt, NULL); | |
410 | ||
411 | if (zlog_is_aux) | |
412 | return; | |
413 | ||
414 | /* until here, crashlogs go to stderr */ | |
415 | zlog_crashlog_init(); | |
416 | } | |
417 | ||
418 | /* syslog */ | |
419 | ||
420 | struct zlt_syslog { | |
421 | struct zlog_target zt; | |
422 | ||
423 | int syslog_facility; | |
424 | }; | |
425 | ||
426 | static void zlog_syslog(struct zlog_target *zt, struct zlog_msg *msgs[], | |
427 | size_t nmsgs) | |
428 | { | |
429 | size_t i; | |
430 | struct zlt_syslog *zte = container_of(zt, struct zlt_syslog, zt); | |
8b94cb43 DL |
431 | const char *text; |
432 | size_t text_len; | |
0bdeb5e5 DL |
433 | |
434 | for (i = 0; i < nmsgs; i++) { | |
435 | if (zlog_msg_prio(msgs[i]) > zt->prio_min) | |
436 | continue; | |
437 | ||
8b94cb43 DL |
438 | text = zlog_msg_text(msgs[i], &text_len); |
439 | syslog(zlog_msg_prio(msgs[i]) | zte->syslog_facility, "%.*s", | |
440 | (int)text_len, text); | |
0bdeb5e5 DL |
441 | } |
442 | } | |
443 | ||
444 | #ifndef _PATH_LOG | |
445 | #define _PATH_LOG "/dev/log" | |
446 | #endif | |
447 | ||
448 | static void zlog_syslog_sigsafe(struct zlog_target *zt, const char *text, | |
449 | size_t len) | |
450 | { | |
451 | static int syslog_fd = -1; | |
452 | ||
453 | char hdr[192]; | |
454 | size_t hdrlen; | |
455 | struct iovec iov[2]; | |
456 | ||
457 | if (syslog_fd == -1) { | |
458 | syslog_fd = socket(AF_UNIX, SOCK_DGRAM, 0); | |
459 | if (syslog_fd >= 0) { | |
460 | struct sockaddr_un sa; | |
461 | socklen_t salen = sizeof(sa); | |
462 | ||
463 | sa.sun_family = AF_UNIX; | |
464 | strlcpy(sa.sun_path, _PATH_LOG, sizeof(sa.sun_path)); | |
465 | #ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN | |
466 | salen = sa.sun_len = SUN_LEN(&sa); | |
467 | #endif | |
468 | if (connect(syslog_fd, (struct sockaddr *)&sa, salen)) { | |
469 | close(syslog_fd); | |
470 | syslog_fd = -1; | |
471 | } | |
472 | } | |
473 | ||
474 | /* /dev/log could be a fifo instead of a socket */ | |
475 | if (syslog_fd == -1) { | |
476 | syslog_fd = open(_PATH_LOG, O_WRONLY | O_NOCTTY); | |
477 | if (syslog_fd < 0) | |
478 | /* give up ... */ | |
479 | syslog_fd = -2; | |
480 | } | |
481 | } | |
482 | ||
483 | if (syslog_fd == -2) | |
484 | return; | |
485 | ||
486 | /* note zlog_prefix includes trailing ": ", need to cut off 2 chars */ | |
487 | hdrlen = snprintfrr(hdr, sizeof(hdr), "<%d>%.*s[%ld]: ", LOG_CRIT, | |
488 | zlog_prefixsz > 2 ? (int)(zlog_prefixsz - 2) : 0, | |
489 | zlog_prefix, (long)getpid()); | |
490 | ||
491 | iov[0].iov_base = hdr; | |
492 | iov[0].iov_len = hdrlen; | |
493 | ||
494 | iov[1].iov_base = (char *)text; | |
495 | iov[1].iov_len = len; | |
496 | ||
497 | writev(syslog_fd, iov, array_size(iov)); | |
498 | } | |
499 | ||
500 | ||
501 | static pthread_mutex_t syslog_cfg_mutex = PTHREAD_MUTEX_INITIALIZER; | |
502 | static struct zlt_syslog *zlt_syslog; | |
503 | static int syslog_facility = LOG_DAEMON; | |
504 | static int syslog_prio_min = ZLOG_DISABLED; | |
505 | ||
506 | void zlog_syslog_set_facility(int facility) | |
507 | { | |
508 | struct zlog_target *newztc; | |
509 | struct zlt_syslog *newzt; | |
510 | ||
cb1991af | 511 | frr_with_mutex (&syslog_cfg_mutex) { |
0bdeb5e5 DL |
512 | if (facility == syslog_facility) |
513 | return; | |
514 | syslog_facility = facility; | |
515 | ||
516 | if (syslog_prio_min == ZLOG_DISABLED) | |
517 | return; | |
518 | ||
519 | newztc = zlog_target_clone(MTYPE_LOG_SYSL, &zlt_syslog->zt, | |
520 | sizeof(*newzt)); | |
521 | newzt = container_of(newztc, struct zlt_syslog, zt); | |
522 | newzt->syslog_facility = syslog_facility; | |
523 | ||
524 | zlog_target_free(MTYPE_LOG_SYSL, | |
525 | zlog_target_replace(&zlt_syslog->zt, | |
526 | &newzt->zt)); | |
527 | ||
528 | zlt_syslog = newzt; | |
529 | } | |
530 | } | |
531 | ||
532 | int zlog_syslog_get_facility(void) | |
533 | { | |
cb1991af | 534 | frr_with_mutex (&syslog_cfg_mutex) { |
0bdeb5e5 DL |
535 | return syslog_facility; |
536 | } | |
537 | assert(0); | |
16c150f2 | 538 | return 0; |
0bdeb5e5 DL |
539 | } |
540 | ||
541 | void zlog_syslog_set_prio_min(int prio_min) | |
542 | { | |
543 | struct zlog_target *newztc; | |
544 | struct zlt_syslog *newzt = NULL; | |
545 | ||
cb1991af | 546 | frr_with_mutex (&syslog_cfg_mutex) { |
0bdeb5e5 DL |
547 | if (prio_min == syslog_prio_min) |
548 | return; | |
549 | syslog_prio_min = prio_min; | |
550 | ||
551 | if (syslog_prio_min != ZLOG_DISABLED) { | |
552 | newztc = zlog_target_clone(MTYPE_LOG_SYSL, | |
553 | &zlt_syslog->zt, | |
554 | sizeof(*newzt)); | |
555 | newzt = container_of(newztc, struct zlt_syslog, zt); | |
556 | newzt->zt.prio_min = prio_min; | |
557 | newzt->zt.logfn = zlog_syslog; | |
558 | newzt->zt.logfn_sigsafe = zlog_syslog_sigsafe; | |
559 | newzt->syslog_facility = syslog_facility; | |
560 | } | |
561 | ||
562 | zlog_target_free(MTYPE_LOG_SYSL, | |
563 | zlog_target_replace(&zlt_syslog->zt, | |
564 | &newzt->zt)); | |
565 | ||
566 | zlt_syslog = newzt; | |
567 | } | |
568 | } | |
569 | ||
570 | int zlog_syslog_get_prio_min(void) | |
571 | { | |
cb1991af | 572 | frr_with_mutex (&syslog_cfg_mutex) { |
0bdeb5e5 DL |
573 | return syslog_prio_min; |
574 | } | |
575 | assert(0); | |
16c150f2 | 576 | return 0; |
0bdeb5e5 | 577 | } |