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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/epoll.h> | |
23 | #include <sys/socket.h> | |
24 | #include <errno.h> | |
25 | #include <sys/signalfd.h> | |
26 | #include <unistd.h> | |
27 | #include <fcntl.h> | |
28 | #include <stddef.h> | |
29 | #include <sys/ioctl.h> | |
30 | #include <linux/sockios.h> | |
31 | #include <sys/statvfs.h> | |
32 | #include <sys/mman.h> | |
33 | ||
34 | #include <libudev.h> | |
35 | #include <systemd/sd-journal.h> | |
36 | #include <systemd/sd-messages.h> | |
37 | #include <systemd/sd-daemon.h> | |
38 | ||
39 | #ifdef HAVE_LOGIND | |
40 | #include <systemd/sd-login.h> | |
41 | #endif | |
42 | ||
43 | #include "mkdir.h" | |
44 | #include "hashmap.h" | |
45 | #include "journal-file.h" | |
46 | #include "socket-util.h" | |
47 | #include "cgroup-util.h" | |
48 | #include "list.h" | |
49 | #include "virt.h" | |
50 | #include "missing.h" | |
51 | #include "conf-parser.h" | |
52 | #include "journal-internal.h" | |
53 | #include "journal-vacuum.h" | |
54 | #include "journal-authenticate.h" | |
55 | #include "journald.h" | |
56 | #include "journald-rate-limit.h" | |
57 | #include "journald-kmsg.h" | |
58 | #include "journald-syslog.h" | |
59 | #include "journald-stream.h" | |
60 | #include "journald-console.h" | |
61 | #include "journald-native.h" | |
62 | ||
63 | #ifdef HAVE_ACL | |
64 | #include <sys/acl.h> | |
65 | #include <acl/libacl.h> | |
66 | #include "acl-util.h" | |
67 | #endif | |
68 | ||
69 | #ifdef HAVE_SELINUX | |
70 | #include <selinux/selinux.h> | |
71 | #endif | |
72 | ||
73 | #define USER_JOURNALS_MAX 1024 | |
74 | ||
75 | #define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC) | |
76 | #define DEFAULT_RATE_LIMIT_BURST 200 | |
77 | ||
78 | #define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) | |
79 | ||
80 | static const char* const storage_table[] = { | |
81 | [STORAGE_AUTO] = "auto", | |
82 | [STORAGE_VOLATILE] = "volatile", | |
83 | [STORAGE_PERSISTENT] = "persistent", | |
84 | [STORAGE_NONE] = "none" | |
85 | }; | |
86 | ||
87 | DEFINE_STRING_TABLE_LOOKUP(storage, Storage); | |
88 | DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting"); | |
89 | ||
90 | static uint64_t available_space(Server *s) { | |
91 | char ids[33], *p; | |
92 | const char *f; | |
93 | sd_id128_t machine; | |
94 | struct statvfs ss; | |
95 | uint64_t sum = 0, avail = 0, ss_avail = 0; | |
96 | int r; | |
97 | DIR *d; | |
98 | usec_t ts; | |
99 | JournalMetrics *m; | |
100 | ||
101 | ts = now(CLOCK_MONOTONIC); | |
102 | ||
103 | if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts) | |
104 | return s->cached_available_space; | |
105 | ||
106 | r = sd_id128_get_machine(&machine); | |
107 | if (r < 0) | |
108 | return 0; | |
109 | ||
110 | if (s->system_journal) { | |
111 | f = "/var/log/journal/"; | |
112 | m = &s->system_metrics; | |
113 | } else { | |
114 | f = "/run/log/journal/"; | |
115 | m = &s->runtime_metrics; | |
116 | } | |
117 | ||
118 | assert(m); | |
119 | ||
120 | p = strappend(f, sd_id128_to_string(machine, ids)); | |
121 | if (!p) | |
122 | return 0; | |
123 | ||
124 | d = opendir(p); | |
125 | free(p); | |
126 | ||
127 | if (!d) | |
128 | return 0; | |
129 | ||
130 | if (fstatvfs(dirfd(d), &ss) < 0) | |
131 | goto finish; | |
132 | ||
133 | for (;;) { | |
134 | struct stat st; | |
135 | struct dirent buf, *de; | |
136 | ||
137 | r = readdir_r(d, &buf, &de); | |
138 | if (r != 0) | |
139 | break; | |
140 | ||
141 | if (!de) | |
142 | break; | |
143 | ||
144 | if (!endswith(de->d_name, ".journal") && | |
145 | !endswith(de->d_name, ".journal~")) | |
146 | continue; | |
147 | ||
148 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
149 | continue; | |
150 | ||
151 | if (!S_ISREG(st.st_mode)) | |
152 | continue; | |
153 | ||
154 | sum += (uint64_t) st.st_blocks * 512UL; | |
155 | } | |
156 | ||
157 | avail = sum >= m->max_use ? 0 : m->max_use - sum; | |
158 | ||
159 | ss_avail = ss.f_bsize * ss.f_bavail; | |
160 | ||
161 | ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free; | |
162 | ||
163 | if (ss_avail < avail) | |
164 | avail = ss_avail; | |
165 | ||
166 | s->cached_available_space = avail; | |
167 | s->cached_available_space_timestamp = ts; | |
168 | ||
169 | finish: | |
170 | closedir(d); | |
171 | ||
172 | return avail; | |
173 | } | |
174 | ||
175 | static void server_read_file_gid(Server *s) { | |
176 | const char *adm = "adm"; | |
177 | int r; | |
178 | ||
179 | assert(s); | |
180 | ||
181 | if (s->file_gid_valid) | |
182 | return; | |
183 | ||
184 | r = get_group_creds(&adm, &s->file_gid); | |
185 | if (r < 0) | |
186 | log_warning("Failed to resolve 'adm' group: %s", strerror(-r)); | |
187 | ||
188 | /* if we couldn't read the gid, then it will be 0, but that's | |
189 | * fine and we shouldn't try to resolve the group again, so | |
190 | * let's just pretend it worked right-away. */ | |
191 | s->file_gid_valid = true; | |
192 | } | |
193 | ||
194 | static void server_fix_perms(Server *s, JournalFile *f, uid_t uid) { | |
195 | int r; | |
196 | #ifdef HAVE_ACL | |
197 | acl_t acl; | |
198 | acl_entry_t entry; | |
199 | acl_permset_t permset; | |
200 | #endif | |
201 | ||
202 | assert(f); | |
203 | ||
204 | server_read_file_gid(s); | |
205 | ||
206 | r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid); | |
207 | if (r < 0) | |
208 | log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r)); | |
209 | ||
210 | #ifdef HAVE_ACL | |
211 | if (uid <= 0) | |
212 | return; | |
213 | ||
214 | acl = acl_get_fd(f->fd); | |
215 | if (!acl) { | |
216 | log_warning("Failed to read ACL on %s, ignoring: %m", f->path); | |
217 | return; | |
218 | } | |
219 | ||
220 | r = acl_find_uid(acl, uid, &entry); | |
221 | if (r <= 0) { | |
222 | ||
223 | if (acl_create_entry(&acl, &entry) < 0 || | |
224 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
225 | acl_set_qualifier(entry, &uid) < 0) { | |
226 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
227 | goto finish; | |
228 | } | |
229 | } | |
230 | ||
231 | if (acl_get_permset(entry, &permset) < 0 || | |
232 | acl_add_perm(permset, ACL_READ) < 0 || | |
233 | acl_calc_mask(&acl) < 0) { | |
234 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
235 | goto finish; | |
236 | } | |
237 | ||
238 | if (acl_set_fd(f->fd, acl) < 0) | |
239 | log_warning("Failed to set ACL on %s, ignoring: %m", f->path); | |
240 | ||
241 | finish: | |
242 | acl_free(acl); | |
243 | #endif | |
244 | } | |
245 | ||
246 | static JournalFile* find_journal(Server *s, uid_t uid) { | |
247 | char *p; | |
248 | int r; | |
249 | JournalFile *f; | |
250 | sd_id128_t machine; | |
251 | ||
252 | assert(s); | |
253 | ||
254 | /* We split up user logs only on /var, not on /run. If the | |
255 | * runtime file is open, we write to it exclusively, in order | |
256 | * to guarantee proper order as soon as we flush /run to | |
257 | * /var and close the runtime file. */ | |
258 | ||
259 | if (s->runtime_journal) | |
260 | return s->runtime_journal; | |
261 | ||
262 | if (uid <= 0) | |
263 | return s->system_journal; | |
264 | ||
265 | r = sd_id128_get_machine(&machine); | |
266 | if (r < 0) | |
267 | return s->system_journal; | |
268 | ||
269 | f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid)); | |
270 | if (f) | |
271 | return f; | |
272 | ||
273 | if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/user-%lu.journal", | |
274 | SD_ID128_FORMAT_VAL(machine), (unsigned long) uid) < 0) | |
275 | return s->system_journal; | |
276 | ||
277 | while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) { | |
278 | /* Too many open? Then let's close one */ | |
279 | f = hashmap_steal_first(s->user_journals); | |
280 | assert(f); | |
281 | journal_file_close(f); | |
282 | } | |
283 | ||
284 | r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, s->system_journal, &f); | |
285 | free(p); | |
286 | ||
287 | if (r < 0) | |
288 | return s->system_journal; | |
289 | ||
290 | server_fix_perms(s, f, uid); | |
291 | ||
292 | r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f); | |
293 | if (r < 0) { | |
294 | journal_file_close(f); | |
295 | return s->system_journal; | |
296 | } | |
297 | ||
298 | return f; | |
299 | } | |
300 | ||
301 | static void server_rotate(Server *s) { | |
302 | JournalFile *f; | |
303 | void *k; | |
304 | Iterator i; | |
305 | int r; | |
306 | ||
307 | log_info("Rotating..."); | |
308 | ||
309 | if (s->runtime_journal) { | |
310 | r = journal_file_rotate(&s->runtime_journal, s->compress, false); | |
311 | if (r < 0) | |
312 | if (s->runtime_journal) | |
313 | log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r)); | |
314 | else | |
315 | log_error("Failed to create new runtime journal: %s", strerror(-r)); | |
316 | else | |
317 | server_fix_perms(s, s->runtime_journal, 0); | |
318 | } | |
319 | ||
320 | if (s->system_journal) { | |
321 | r = journal_file_rotate(&s->system_journal, s->compress, s->seal); | |
322 | if (r < 0) | |
323 | if (s->system_journal) | |
324 | log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r)); | |
325 | else | |
326 | log_error("Failed to create new system journal: %s", strerror(-r)); | |
327 | ||
328 | else | |
329 | server_fix_perms(s, s->system_journal, 0); | |
330 | } | |
331 | ||
332 | HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { | |
333 | r = journal_file_rotate(&f, s->compress, s->seal); | |
334 | if (r < 0) | |
335 | if (f->path) | |
336 | log_error("Failed to rotate %s: %s", f->path, strerror(-r)); | |
337 | else | |
338 | log_error("Failed to create user journal: %s", strerror(-r)); | |
339 | else { | |
340 | hashmap_replace(s->user_journals, k, f); | |
341 | server_fix_perms(s, s->system_journal, PTR_TO_UINT32(k)); | |
342 | } | |
343 | } | |
344 | } | |
345 | ||
346 | static void server_vacuum(Server *s) { | |
347 | char *p; | |
348 | char ids[33]; | |
349 | sd_id128_t machine; | |
350 | int r; | |
351 | ||
352 | log_info("Vacuuming..."); | |
353 | ||
354 | r = sd_id128_get_machine(&machine); | |
355 | if (r < 0) { | |
356 | log_error("Failed to get machine ID: %s", strerror(-r)); | |
357 | return; | |
358 | } | |
359 | ||
360 | sd_id128_to_string(machine, ids); | |
361 | ||
362 | if (s->system_journal) { | |
363 | p = strappend("/var/log/journal/", ids); | |
364 | if (!p) { | |
365 | log_oom(); | |
366 | return; | |
367 | } | |
368 | ||
369 | r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free); | |
370 | if (r < 0 && r != -ENOENT) | |
371 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
372 | free(p); | |
373 | } | |
374 | ||
375 | if (s->runtime_journal) { | |
376 | p = strappend("/run/log/journal/", ids); | |
377 | if (!p) { | |
378 | log_oom(); | |
379 | return; | |
380 | } | |
381 | ||
382 | r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free); | |
383 | if (r < 0 && r != -ENOENT) | |
384 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
385 | free(p); | |
386 | } | |
387 | ||
388 | s->cached_available_space_timestamp = 0; | |
389 | } | |
390 | ||
391 | static char *shortened_cgroup_path(pid_t pid) { | |
392 | int r; | |
393 | char *process_path, *init_path, *path; | |
394 | ||
395 | assert(pid > 0); | |
396 | ||
397 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path); | |
398 | if (r < 0) | |
399 | return NULL; | |
400 | ||
401 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path); | |
402 | if (r < 0) { | |
403 | free(process_path); | |
404 | return NULL; | |
405 | } | |
406 | ||
407 | if (endswith(init_path, "/system")) | |
408 | init_path[strlen(init_path) - 7] = 0; | |
409 | else if (streq(init_path, "/")) | |
410 | init_path[0] = 0; | |
411 | ||
412 | if (startswith(process_path, init_path)) { | |
413 | char *p; | |
414 | ||
415 | p = strdup(process_path + strlen(init_path)); | |
416 | if (!p) { | |
417 | free(process_path); | |
418 | free(init_path); | |
419 | return NULL; | |
420 | } | |
421 | path = p; | |
422 | } else { | |
423 | path = process_path; | |
424 | process_path = NULL; | |
425 | } | |
426 | ||
427 | free(process_path); | |
428 | free(init_path); | |
429 | ||
430 | return path; | |
431 | } | |
432 | ||
433 | static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, unsigned n) { | |
434 | JournalFile *f; | |
435 | bool vacuumed = false; | |
436 | int r; | |
437 | ||
438 | assert(s); | |
439 | assert(iovec); | |
440 | assert(n > 0); | |
441 | ||
442 | f = find_journal(s, uid); | |
443 | if (!f) | |
444 | return; | |
445 | ||
446 | if (journal_file_rotate_suggested(f)) { | |
447 | log_info("Journal header limits reached or header out-of-date, rotating."); | |
448 | server_rotate(s); | |
449 | server_vacuum(s); | |
450 | vacuumed = true; | |
451 | ||
452 | f = find_journal(s, uid); | |
453 | if (!f) | |
454 | return; | |
455 | } | |
456 | ||
457 | for (;;) { | |
458 | r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL); | |
459 | if (r >= 0) | |
460 | return; | |
461 | ||
462 | if (vacuumed || | |
463 | (r != -E2BIG && /* hit limit */ | |
464 | r != -EFBIG && /* hit fs limit */ | |
465 | r != -EDQUOT && /* quota hit */ | |
466 | r != -ENOSPC && /* disk full */ | |
467 | r != -EBADMSG && /* corrupted */ | |
468 | r != -ENODATA && /* truncated */ | |
469 | r != -EHOSTDOWN && /* other machine */ | |
470 | r != -EPROTONOSUPPORT && /* unsupported feature */ | |
471 | r != -EBUSY && /* unclean shutdown */ | |
472 | r != -ESHUTDOWN /* already archived */)) { | |
473 | log_error("Failed to write entry, ignoring: %s", strerror(-r)); | |
474 | return; | |
475 | } | |
476 | ||
477 | if (r == -E2BIG || r == -EFBIG || r == EDQUOT || r == ENOSPC) | |
478 | log_info("Allocation limit reached, rotating."); | |
479 | else if (r == -EHOSTDOWN) | |
480 | log_info("Journal file from other machine, rotating."); | |
481 | else if (r == -EBUSY) | |
482 | log_info("Unlcean shutdown, rotating."); | |
483 | else | |
484 | log_warning("Journal file corrupted, rotating."); | |
485 | ||
486 | server_rotate(s); | |
487 | server_vacuum(s); | |
488 | vacuumed = true; | |
489 | ||
490 | f = find_journal(s, uid); | |
491 | if (!f) | |
492 | return; | |
493 | ||
494 | log_info("Retrying write."); | |
495 | } | |
496 | } | |
497 | ||
498 | static void dispatch_message_real( | |
499 | Server *s, | |
500 | struct iovec *iovec, unsigned n, unsigned m, | |
501 | struct ucred *ucred, | |
502 | struct timeval *tv, | |
503 | const char *label, size_t label_len, | |
504 | const char *unit_id) { | |
505 | ||
506 | char *pid = NULL, *uid = NULL, *gid = NULL, | |
507 | *source_time = NULL, *boot_id = NULL, *machine_id = NULL, | |
508 | *comm = NULL, *cmdline = NULL, *hostname = NULL, | |
509 | *audit_session = NULL, *audit_loginuid = NULL, | |
510 | *exe = NULL, *cgroup = NULL, *session = NULL, | |
511 | *owner_uid = NULL, *unit = NULL, *selinux_context = NULL; | |
512 | ||
513 | char idbuf[33]; | |
514 | sd_id128_t id; | |
515 | int r; | |
516 | char *t; | |
517 | uid_t loginuid = 0, realuid = 0; | |
518 | ||
519 | assert(s); | |
520 | assert(iovec); | |
521 | assert(n > 0); | |
522 | assert(n + N_IOVEC_META_FIELDS <= m); | |
523 | ||
524 | if (ucred) { | |
525 | uint32_t audit; | |
526 | #ifdef HAVE_LOGIND | |
527 | uid_t owner; | |
528 | #endif | |
529 | ||
530 | realuid = ucred->uid; | |
531 | ||
532 | if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0) | |
533 | IOVEC_SET_STRING(iovec[n++], pid); | |
534 | ||
535 | if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0) | |
536 | IOVEC_SET_STRING(iovec[n++], uid); | |
537 | ||
538 | if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0) | |
539 | IOVEC_SET_STRING(iovec[n++], gid); | |
540 | ||
541 | r = get_process_comm(ucred->pid, &t); | |
542 | if (r >= 0) { | |
543 | comm = strappend("_COMM=", t); | |
544 | free(t); | |
545 | ||
546 | if (comm) | |
547 | IOVEC_SET_STRING(iovec[n++], comm); | |
548 | } | |
549 | ||
550 | r = get_process_exe(ucred->pid, &t); | |
551 | if (r >= 0) { | |
552 | exe = strappend("_EXE=", t); | |
553 | free(t); | |
554 | ||
555 | if (exe) | |
556 | IOVEC_SET_STRING(iovec[n++], exe); | |
557 | } | |
558 | ||
559 | r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t); | |
560 | if (r >= 0) { | |
561 | cmdline = strappend("_CMDLINE=", t); | |
562 | free(t); | |
563 | ||
564 | if (cmdline) | |
565 | IOVEC_SET_STRING(iovec[n++], cmdline); | |
566 | } | |
567 | ||
568 | r = audit_session_from_pid(ucred->pid, &audit); | |
569 | if (r >= 0) | |
570 | if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0) | |
571 | IOVEC_SET_STRING(iovec[n++], audit_session); | |
572 | ||
573 | r = audit_loginuid_from_pid(ucred->pid, &loginuid); | |
574 | if (r >= 0) | |
575 | if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0) | |
576 | IOVEC_SET_STRING(iovec[n++], audit_loginuid); | |
577 | ||
578 | t = shortened_cgroup_path(ucred->pid); | |
579 | if (t) { | |
580 | cgroup = strappend("_SYSTEMD_CGROUP=", t); | |
581 | free(t); | |
582 | ||
583 | if (cgroup) | |
584 | IOVEC_SET_STRING(iovec[n++], cgroup); | |
585 | } | |
586 | ||
587 | #ifdef HAVE_LOGIND | |
588 | if (sd_pid_get_session(ucred->pid, &t) >= 0) { | |
589 | session = strappend("_SYSTEMD_SESSION=", t); | |
590 | free(t); | |
591 | ||
592 | if (session) | |
593 | IOVEC_SET_STRING(iovec[n++], session); | |
594 | } | |
595 | ||
596 | if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0) | |
597 | if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0) | |
598 | IOVEC_SET_STRING(iovec[n++], owner_uid); | |
599 | #endif | |
600 | ||
601 | if (cg_pid_get_unit(ucred->pid, &t) >= 0) { | |
602 | unit = strappend("_SYSTEMD_UNIT=", t); | |
603 | free(t); | |
604 | } else if (unit_id) | |
605 | unit = strappend("_SYSTEMD_UNIT=", unit_id); | |
606 | ||
607 | if (unit) | |
608 | IOVEC_SET_STRING(iovec[n++], unit); | |
609 | ||
610 | #ifdef HAVE_SELINUX | |
611 | if (label) { | |
612 | selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len); | |
613 | if (selinux_context) { | |
614 | memcpy(selinux_context, "_SELINUX_CONTEXT=", sizeof("_SELINUX_CONTEXT=")-1); | |
615 | memcpy(selinux_context+sizeof("_SELINUX_CONTEXT=")-1, label, label_len); | |
616 | selinux_context[sizeof("_SELINUX_CONTEXT=")-1+label_len] = 0; | |
617 | IOVEC_SET_STRING(iovec[n++], selinux_context); | |
618 | } | |
619 | } else { | |
620 | security_context_t con; | |
621 | ||
622 | if (getpidcon(ucred->pid, &con) >= 0) { | |
623 | selinux_context = strappend("_SELINUX_CONTEXT=", con); | |
624 | if (selinux_context) | |
625 | IOVEC_SET_STRING(iovec[n++], selinux_context); | |
626 | ||
627 | freecon(con); | |
628 | } | |
629 | } | |
630 | #endif | |
631 | } | |
632 | ||
633 | if (tv) { | |
634 | if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", | |
635 | (unsigned long long) timeval_load(tv)) >= 0) | |
636 | IOVEC_SET_STRING(iovec[n++], source_time); | |
637 | } | |
638 | ||
639 | /* Note that strictly speaking storing the boot id here is | |
640 | * redundant since the entry includes this in-line | |
641 | * anyway. However, we need this indexed, too. */ | |
642 | r = sd_id128_get_boot(&id); | |
643 | if (r >= 0) | |
644 | if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) | |
645 | IOVEC_SET_STRING(iovec[n++], boot_id); | |
646 | ||
647 | r = sd_id128_get_machine(&id); | |
648 | if (r >= 0) | |
649 | if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) | |
650 | IOVEC_SET_STRING(iovec[n++], machine_id); | |
651 | ||
652 | t = gethostname_malloc(); | |
653 | if (t) { | |
654 | hostname = strappend("_HOSTNAME=", t); | |
655 | free(t); | |
656 | if (hostname) | |
657 | IOVEC_SET_STRING(iovec[n++], hostname); | |
658 | } | |
659 | ||
660 | assert(n <= m); | |
661 | ||
662 | write_to_journal(s, realuid == 0 ? 0 : loginuid, iovec, n); | |
663 | ||
664 | free(pid); | |
665 | free(uid); | |
666 | free(gid); | |
667 | free(comm); | |
668 | free(exe); | |
669 | free(cmdline); | |
670 | free(source_time); | |
671 | free(boot_id); | |
672 | free(machine_id); | |
673 | free(hostname); | |
674 | free(audit_session); | |
675 | free(audit_loginuid); | |
676 | free(cgroup); | |
677 | free(session); | |
678 | free(owner_uid); | |
679 | free(unit); | |
680 | free(selinux_context); | |
681 | } | |
682 | ||
683 | void server_driver_message(Server *s, sd_id128_t message_id, const char *format, ...) { | |
684 | char mid[11 + 32 + 1]; | |
685 | char buffer[16 + LINE_MAX + 1]; | |
686 | struct iovec iovec[N_IOVEC_META_FIELDS + 4]; | |
687 | int n = 0; | |
688 | va_list ap; | |
689 | struct ucred ucred; | |
690 | ||
691 | assert(s); | |
692 | assert(format); | |
693 | ||
694 | IOVEC_SET_STRING(iovec[n++], "PRIORITY=6"); | |
695 | IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver"); | |
696 | ||
697 | memcpy(buffer, "MESSAGE=", 8); | |
698 | va_start(ap, format); | |
699 | vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap); | |
700 | va_end(ap); | |
701 | char_array_0(buffer); | |
702 | IOVEC_SET_STRING(iovec[n++], buffer); | |
703 | ||
704 | snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id)); | |
705 | char_array_0(mid); | |
706 | IOVEC_SET_STRING(iovec[n++], mid); | |
707 | ||
708 | zero(ucred); | |
709 | ucred.pid = getpid(); | |
710 | ucred.uid = getuid(); | |
711 | ucred.gid = getgid(); | |
712 | ||
713 | dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL); | |
714 | } | |
715 | ||
716 | void server_dispatch_message( | |
717 | Server *s, | |
718 | struct iovec *iovec, unsigned n, unsigned m, | |
719 | struct ucred *ucred, | |
720 | struct timeval *tv, | |
721 | const char *label, size_t label_len, | |
722 | const char *unit_id, | |
723 | int priority) { | |
724 | ||
725 | int rl; | |
726 | char *path = NULL, *c; | |
727 | ||
728 | assert(s); | |
729 | assert(iovec || n == 0); | |
730 | ||
731 | if (n == 0) | |
732 | return; | |
733 | ||
734 | if (LOG_PRI(priority) > s->max_level_store) | |
735 | return; | |
736 | ||
737 | if (!ucred) | |
738 | goto finish; | |
739 | ||
740 | path = shortened_cgroup_path(ucred->pid); | |
741 | if (!path) | |
742 | goto finish; | |
743 | ||
744 | /* example: /user/lennart/3/foobar | |
745 | * /system/dbus.service/foobar | |
746 | * | |
747 | * So let's cut of everything past the third /, since that is | |
748 | * wher user directories start */ | |
749 | ||
750 | c = strchr(path, '/'); | |
751 | if (c) { | |
752 | c = strchr(c+1, '/'); | |
753 | if (c) { | |
754 | c = strchr(c+1, '/'); | |
755 | if (c) | |
756 | *c = 0; | |
757 | } | |
758 | } | |
759 | ||
760 | rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available_space(s)); | |
761 | ||
762 | if (rl == 0) { | |
763 | free(path); | |
764 | return; | |
765 | } | |
766 | ||
767 | /* Write a suppression message if we suppressed something */ | |
768 | if (rl > 1) | |
769 | server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path); | |
770 | ||
771 | free(path); | |
772 | ||
773 | finish: | |
774 | dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id); | |
775 | } | |
776 | ||
777 | ||
778 | static int system_journal_open(Server *s) { | |
779 | int r; | |
780 | char *fn; | |
781 | sd_id128_t machine; | |
782 | char ids[33]; | |
783 | ||
784 | r = sd_id128_get_machine(&machine); | |
785 | if (r < 0) | |
786 | return r; | |
787 | ||
788 | sd_id128_to_string(machine, ids); | |
789 | ||
790 | if (!s->system_journal && | |
791 | (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) && | |
792 | access("/run/systemd/journal/flushed", F_OK) >= 0) { | |
793 | ||
794 | /* If in auto mode: first try to create the machine | |
795 | * path, but not the prefix. | |
796 | * | |
797 | * If in persistent mode: create /var/log/journal and | |
798 | * the machine path */ | |
799 | ||
800 | if (s->storage == STORAGE_PERSISTENT) | |
801 | (void) mkdir("/var/log/journal/", 0755); | |
802 | ||
803 | fn = strappend("/var/log/journal/", ids); | |
804 | if (!fn) | |
805 | return -ENOMEM; | |
806 | ||
807 | (void) mkdir(fn, 0755); | |
808 | free(fn); | |
809 | ||
810 | fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL); | |
811 | if (!fn) | |
812 | return -ENOMEM; | |
813 | ||
814 | r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); | |
815 | free(fn); | |
816 | ||
817 | if (r >= 0) | |
818 | server_fix_perms(s, s->system_journal, 0); | |
819 | else if (r < 0) { | |
820 | ||
821 | if (r != -ENOENT && r != -EROFS) | |
822 | log_warning("Failed to open system journal: %s", strerror(-r)); | |
823 | ||
824 | r = 0; | |
825 | } | |
826 | } | |
827 | ||
828 | if (!s->runtime_journal && | |
829 | (s->storage != STORAGE_NONE)) { | |
830 | ||
831 | fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL); | |
832 | if (!fn) | |
833 | return -ENOMEM; | |
834 | ||
835 | if (s->system_journal) { | |
836 | ||
837 | /* Try to open the runtime journal, but only | |
838 | * if it already exists, so that we can flush | |
839 | * it into the system journal */ | |
840 | ||
841 | r = journal_file_open(fn, O_RDWR, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); | |
842 | free(fn); | |
843 | ||
844 | if (r < 0) { | |
845 | if (r != -ENOENT) | |
846 | log_warning("Failed to open runtime journal: %s", strerror(-r)); | |
847 | ||
848 | r = 0; | |
849 | } | |
850 | ||
851 | } else { | |
852 | ||
853 | /* OK, we really need the runtime journal, so create | |
854 | * it if necessary. */ | |
855 | ||
856 | (void) mkdir_parents(fn, 0755); | |
857 | r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); | |
858 | free(fn); | |
859 | ||
860 | if (r < 0) { | |
861 | log_error("Failed to open runtime journal: %s", strerror(-r)); | |
862 | return r; | |
863 | } | |
864 | } | |
865 | ||
866 | if (s->runtime_journal) | |
867 | server_fix_perms(s, s->runtime_journal, 0); | |
868 | } | |
869 | ||
870 | return r; | |
871 | } | |
872 | ||
873 | static int server_flush_to_var(Server *s) { | |
874 | Object *o = NULL; | |
875 | int r; | |
876 | sd_id128_t machine; | |
877 | sd_journal *j; | |
878 | ||
879 | assert(s); | |
880 | ||
881 | if (s->storage != STORAGE_AUTO && | |
882 | s->storage != STORAGE_PERSISTENT) | |
883 | return 0; | |
884 | ||
885 | if (!s->runtime_journal) | |
886 | return 0; | |
887 | ||
888 | system_journal_open(s); | |
889 | ||
890 | if (!s->system_journal) | |
891 | return 0; | |
892 | ||
893 | log_info("Flushing to /var..."); | |
894 | ||
895 | r = sd_id128_get_machine(&machine); | |
896 | if (r < 0) { | |
897 | log_error("Failed to get machine id: %s", strerror(-r)); | |
898 | return r; | |
899 | } | |
900 | ||
901 | r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY); | |
902 | if (r < 0) { | |
903 | log_error("Failed to read runtime journal: %s", strerror(-r)); | |
904 | return r; | |
905 | } | |
906 | ||
907 | SD_JOURNAL_FOREACH(j) { | |
908 | JournalFile *f; | |
909 | ||
910 | f = j->current_file; | |
911 | assert(f && f->current_offset > 0); | |
912 | ||
913 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); | |
914 | if (r < 0) { | |
915 | log_error("Can't read entry: %s", strerror(-r)); | |
916 | goto finish; | |
917 | } | |
918 | ||
919 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
920 | if (r == -E2BIG) { | |
921 | log_info("Allocation limit reached."); | |
922 | ||
923 | journal_file_post_change(s->system_journal); | |
924 | server_rotate(s); | |
925 | server_vacuum(s); | |
926 | ||
927 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
928 | } | |
929 | ||
930 | if (r < 0) { | |
931 | log_error("Can't write entry: %s", strerror(-r)); | |
932 | goto finish; | |
933 | } | |
934 | } | |
935 | ||
936 | finish: | |
937 | journal_file_post_change(s->system_journal); | |
938 | ||
939 | journal_file_close(s->runtime_journal); | |
940 | s->runtime_journal = NULL; | |
941 | ||
942 | if (r >= 0) | |
943 | rm_rf("/run/log/journal", false, true, false); | |
944 | ||
945 | return r; | |
946 | } | |
947 | ||
948 | static int process_event(Server *s, struct epoll_event *ev) { | |
949 | assert(s); | |
950 | assert(ev); | |
951 | ||
952 | if (ev->data.fd == s->signal_fd) { | |
953 | struct signalfd_siginfo sfsi; | |
954 | ssize_t n; | |
955 | ||
956 | if (ev->events != EPOLLIN) { | |
957 | log_info("Got invalid event from epoll."); | |
958 | return -EIO; | |
959 | } | |
960 | ||
961 | n = read(s->signal_fd, &sfsi, sizeof(sfsi)); | |
962 | if (n != sizeof(sfsi)) { | |
963 | ||
964 | if (n >= 0) | |
965 | return -EIO; | |
966 | ||
967 | if (errno == EINTR || errno == EAGAIN) | |
968 | return 1; | |
969 | ||
970 | return -errno; | |
971 | } | |
972 | ||
973 | log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo)); | |
974 | ||
975 | if (sfsi.ssi_signo == SIGUSR1) { | |
976 | touch("/run/systemd/journal/flushed"); | |
977 | server_flush_to_var(s); | |
978 | return 1; | |
979 | } | |
980 | ||
981 | if (sfsi.ssi_signo == SIGUSR2) { | |
982 | server_rotate(s); | |
983 | server_vacuum(s); | |
984 | return 1; | |
985 | } | |
986 | ||
987 | return 0; | |
988 | ||
989 | } else if (ev->data.fd == s->dev_kmsg_fd) { | |
990 | int r; | |
991 | ||
992 | if (ev->events != EPOLLIN) { | |
993 | log_info("Got invalid event from epoll."); | |
994 | return -EIO; | |
995 | } | |
996 | ||
997 | r = server_read_dev_kmsg(s); | |
998 | if (r < 0) | |
999 | return r; | |
1000 | ||
1001 | return 1; | |
1002 | ||
1003 | } else if (ev->data.fd == s->native_fd || | |
1004 | ev->data.fd == s->syslog_fd) { | |
1005 | ||
1006 | if (ev->events != EPOLLIN) { | |
1007 | log_info("Got invalid event from epoll."); | |
1008 | return -EIO; | |
1009 | } | |
1010 | ||
1011 | for (;;) { | |
1012 | struct msghdr msghdr; | |
1013 | struct iovec iovec; | |
1014 | struct ucred *ucred = NULL; | |
1015 | struct timeval *tv = NULL; | |
1016 | struct cmsghdr *cmsg; | |
1017 | char *label = NULL; | |
1018 | size_t label_len = 0; | |
1019 | union { | |
1020 | struct cmsghdr cmsghdr; | |
1021 | ||
1022 | /* We use NAME_MAX space for the | |
1023 | * SELinux label here. The kernel | |
1024 | * currently enforces no limit, but | |
1025 | * according to suggestions from the | |
1026 | * SELinux people this will change and | |
1027 | * it will probably be identical to | |
1028 | * NAME_MAX. For now we use that, but | |
1029 | * this should be updated one day when | |
1030 | * the final limit is known.*/ | |
1031 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + | |
1032 | CMSG_SPACE(sizeof(struct timeval)) + | |
1033 | CMSG_SPACE(sizeof(int)) + /* fd */ | |
1034 | CMSG_SPACE(NAME_MAX)]; /* selinux label */ | |
1035 | } control; | |
1036 | ssize_t n; | |
1037 | int v; | |
1038 | int *fds = NULL; | |
1039 | unsigned n_fds = 0; | |
1040 | ||
1041 | if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) { | |
1042 | log_error("SIOCINQ failed: %m"); | |
1043 | return -errno; | |
1044 | } | |
1045 | ||
1046 | if (s->buffer_size < (size_t) v) { | |
1047 | void *b; | |
1048 | size_t l; | |
1049 | ||
1050 | l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2); | |
1051 | b = realloc(s->buffer, l+1); | |
1052 | ||
1053 | if (!b) { | |
1054 | log_error("Couldn't increase buffer."); | |
1055 | return -ENOMEM; | |
1056 | } | |
1057 | ||
1058 | s->buffer_size = l; | |
1059 | s->buffer = b; | |
1060 | } | |
1061 | ||
1062 | zero(iovec); | |
1063 | iovec.iov_base = s->buffer; | |
1064 | iovec.iov_len = s->buffer_size; | |
1065 | ||
1066 | zero(control); | |
1067 | zero(msghdr); | |
1068 | msghdr.msg_iov = &iovec; | |
1069 | msghdr.msg_iovlen = 1; | |
1070 | msghdr.msg_control = &control; | |
1071 | msghdr.msg_controllen = sizeof(control); | |
1072 | ||
1073 | n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); | |
1074 | if (n < 0) { | |
1075 | ||
1076 | if (errno == EINTR || errno == EAGAIN) | |
1077 | return 1; | |
1078 | ||
1079 | log_error("recvmsg() failed: %m"); | |
1080 | return -errno; | |
1081 | } | |
1082 | ||
1083 | for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) { | |
1084 | ||
1085 | if (cmsg->cmsg_level == SOL_SOCKET && | |
1086 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
1087 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
1088 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
1089 | else if (cmsg->cmsg_level == SOL_SOCKET && | |
1090 | cmsg->cmsg_type == SCM_SECURITY) { | |
1091 | label = (char*) CMSG_DATA(cmsg); | |
1092 | label_len = cmsg->cmsg_len - CMSG_LEN(0); | |
1093 | } else if (cmsg->cmsg_level == SOL_SOCKET && | |
1094 | cmsg->cmsg_type == SO_TIMESTAMP && | |
1095 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) | |
1096 | tv = (struct timeval*) CMSG_DATA(cmsg); | |
1097 | else if (cmsg->cmsg_level == SOL_SOCKET && | |
1098 | cmsg->cmsg_type == SCM_RIGHTS) { | |
1099 | fds = (int*) CMSG_DATA(cmsg); | |
1100 | n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | if (ev->data.fd == s->syslog_fd) { | |
1105 | char *e; | |
1106 | ||
1107 | if (n > 0 && n_fds == 0) { | |
1108 | e = memchr(s->buffer, '\n', n); | |
1109 | if (e) | |
1110 | *e = 0; | |
1111 | else | |
1112 | s->buffer[n] = 0; | |
1113 | ||
1114 | server_process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len); | |
1115 | } else if (n_fds > 0) | |
1116 | log_warning("Got file descriptors via syslog socket. Ignoring."); | |
1117 | ||
1118 | } else { | |
1119 | if (n > 0 && n_fds == 0) | |
1120 | server_process_native_message(s, s->buffer, n, ucred, tv, label, label_len); | |
1121 | else if (n == 0 && n_fds == 1) | |
1122 | server_process_native_file(s, fds[0], ucred, tv, label, label_len); | |
1123 | else if (n_fds > 0) | |
1124 | log_warning("Got too many file descriptors via native socket. Ignoring."); | |
1125 | } | |
1126 | ||
1127 | close_many(fds, n_fds); | |
1128 | } | |
1129 | ||
1130 | return 1; | |
1131 | ||
1132 | } else if (ev->data.fd == s->stdout_fd) { | |
1133 | ||
1134 | if (ev->events != EPOLLIN) { | |
1135 | log_info("Got invalid event from epoll."); | |
1136 | return -EIO; | |
1137 | } | |
1138 | ||
1139 | stdout_stream_new(s); | |
1140 | return 1; | |
1141 | ||
1142 | } else { | |
1143 | StdoutStream *stream; | |
1144 | ||
1145 | if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { | |
1146 | log_info("Got invalid event from epoll."); | |
1147 | return -EIO; | |
1148 | } | |
1149 | ||
1150 | /* If it is none of the well-known fds, it must be an | |
1151 | * stdout stream fd. Note that this is a bit ugly here | |
1152 | * (since we rely that none of the well-known fds | |
1153 | * could be interpreted as pointer), but nonetheless | |
1154 | * safe, since the well-known fds would never get an | |
1155 | * fd > 4096, i.e. beyond the first memory page */ | |
1156 | ||
1157 | stream = ev->data.ptr; | |
1158 | ||
1159 | if (stdout_stream_process(stream) <= 0) | |
1160 | stdout_stream_free(stream); | |
1161 | ||
1162 | return 1; | |
1163 | } | |
1164 | ||
1165 | log_error("Unknown event."); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | static int open_signalfd(Server *s) { | |
1170 | sigset_t mask; | |
1171 | struct epoll_event ev; | |
1172 | ||
1173 | assert(s); | |
1174 | ||
1175 | assert_se(sigemptyset(&mask) == 0); | |
1176 | sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1); | |
1177 | assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); | |
1178 | ||
1179 | s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
1180 | if (s->signal_fd < 0) { | |
1181 | log_error("signalfd(): %m"); | |
1182 | return -errno; | |
1183 | } | |
1184 | ||
1185 | zero(ev); | |
1186 | ev.events = EPOLLIN; | |
1187 | ev.data.fd = s->signal_fd; | |
1188 | ||
1189 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) { | |
1190 | log_error("epoll_ctl(): %m"); | |
1191 | return -errno; | |
1192 | } | |
1193 | ||
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | static int server_parse_proc_cmdline(Server *s) { | |
1198 | char *line, *w, *state; | |
1199 | int r; | |
1200 | size_t l; | |
1201 | ||
1202 | if (detect_container(NULL) > 0) | |
1203 | return 0; | |
1204 | ||
1205 | r = read_one_line_file("/proc/cmdline", &line); | |
1206 | if (r < 0) { | |
1207 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
1212 | char *word; | |
1213 | ||
1214 | word = strndup(w, l); | |
1215 | if (!word) { | |
1216 | r = -ENOMEM; | |
1217 | goto finish; | |
1218 | } | |
1219 | ||
1220 | if (startswith(word, "systemd.journald.forward_to_syslog=")) { | |
1221 | r = parse_boolean(word + 35); | |
1222 | if (r < 0) | |
1223 | log_warning("Failed to parse forward to syslog switch %s. Ignoring.", word + 35); | |
1224 | else | |
1225 | s->forward_to_syslog = r; | |
1226 | } else if (startswith(word, "systemd.journald.forward_to_kmsg=")) { | |
1227 | r = parse_boolean(word + 33); | |
1228 | if (r < 0) | |
1229 | log_warning("Failed to parse forward to kmsg switch %s. Ignoring.", word + 33); | |
1230 | else | |
1231 | s->forward_to_kmsg = r; | |
1232 | } else if (startswith(word, "systemd.journald.forward_to_console=")) { | |
1233 | r = parse_boolean(word + 36); | |
1234 | if (r < 0) | |
1235 | log_warning("Failed to parse forward to console switch %s. Ignoring.", word + 36); | |
1236 | else | |
1237 | s->forward_to_console = r; | |
1238 | } else if (startswith(word, "systemd.journald")) | |
1239 | log_warning("Invalid systemd.journald parameter. Ignoring."); | |
1240 | ||
1241 | free(word); | |
1242 | } | |
1243 | ||
1244 | r = 0; | |
1245 | ||
1246 | finish: | |
1247 | free(line); | |
1248 | return r; | |
1249 | } | |
1250 | ||
1251 | static int server_parse_config_file(Server *s) { | |
1252 | FILE *f; | |
1253 | const char *fn; | |
1254 | int r; | |
1255 | ||
1256 | assert(s); | |
1257 | ||
1258 | fn = "/etc/systemd/journald.conf"; | |
1259 | f = fopen(fn, "re"); | |
1260 | if (!f) { | |
1261 | if (errno == ENOENT) | |
1262 | return 0; | |
1263 | ||
1264 | log_warning("Failed to open configuration file %s: %m", fn); | |
1265 | return -errno; | |
1266 | } | |
1267 | ||
1268 | r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s); | |
1269 | if (r < 0) | |
1270 | log_warning("Failed to parse configuration file: %s", strerror(-r)); | |
1271 | ||
1272 | fclose(f); | |
1273 | ||
1274 | return r; | |
1275 | } | |
1276 | ||
1277 | static int server_init(Server *s) { | |
1278 | int n, r, fd; | |
1279 | ||
1280 | assert(s); | |
1281 | ||
1282 | zero(*s); | |
1283 | s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1; | |
1284 | s->compress = true; | |
1285 | s->seal = true; | |
1286 | ||
1287 | s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL; | |
1288 | s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST; | |
1289 | ||
1290 | s->forward_to_syslog = true; | |
1291 | ||
1292 | s->max_level_store = LOG_DEBUG; | |
1293 | s->max_level_syslog = LOG_DEBUG; | |
1294 | s->max_level_kmsg = LOG_NOTICE; | |
1295 | s->max_level_console = LOG_INFO; | |
1296 | ||
1297 | memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics)); | |
1298 | memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics)); | |
1299 | ||
1300 | server_parse_config_file(s); | |
1301 | server_parse_proc_cmdline(s); | |
1302 | ||
1303 | mkdir_p("/run/systemd/journal", 0755); | |
1304 | ||
1305 | s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func); | |
1306 | if (!s->user_journals) | |
1307 | return log_oom(); | |
1308 | ||
1309 | s->mmap = mmap_cache_new(); | |
1310 | if (!s->mmap) | |
1311 | return log_oom(); | |
1312 | ||
1313 | s->epoll_fd = epoll_create1(EPOLL_CLOEXEC); | |
1314 | if (s->epoll_fd < 0) { | |
1315 | log_error("Failed to create epoll object: %m"); | |
1316 | return -errno; | |
1317 | } | |
1318 | ||
1319 | n = sd_listen_fds(true); | |
1320 | if (n < 0) { | |
1321 | log_error("Failed to read listening file descriptors from environment: %s", strerror(-n)); | |
1322 | return n; | |
1323 | } | |
1324 | ||
1325 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { | |
1326 | ||
1327 | if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) { | |
1328 | ||
1329 | if (s->native_fd >= 0) { | |
1330 | log_error("Too many native sockets passed."); | |
1331 | return -EINVAL; | |
1332 | } | |
1333 | ||
1334 | s->native_fd = fd; | |
1335 | ||
1336 | } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) { | |
1337 | ||
1338 | if (s->stdout_fd >= 0) { | |
1339 | log_error("Too many stdout sockets passed."); | |
1340 | return -EINVAL; | |
1341 | } | |
1342 | ||
1343 | s->stdout_fd = fd; | |
1344 | ||
1345 | } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) { | |
1346 | ||
1347 | if (s->syslog_fd >= 0) { | |
1348 | log_error("Too many /dev/log sockets passed."); | |
1349 | return -EINVAL; | |
1350 | } | |
1351 | ||
1352 | s->syslog_fd = fd; | |
1353 | ||
1354 | } else { | |
1355 | log_error("Unknown socket passed."); | |
1356 | return -EINVAL; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | r = server_open_syslog_socket(s); | |
1361 | if (r < 0) | |
1362 | return r; | |
1363 | ||
1364 | r = server_open_native_socket(s); | |
1365 | if (r < 0) | |
1366 | return r; | |
1367 | ||
1368 | r = server_open_stdout_socket(s); | |
1369 | if (r < 0) | |
1370 | return r; | |
1371 | ||
1372 | r = server_open_dev_kmsg(s); | |
1373 | if (r < 0) | |
1374 | return r; | |
1375 | ||
1376 | r = server_open_kernel_seqnum(s); | |
1377 | if (r < 0) | |
1378 | return r; | |
1379 | ||
1380 | r = open_signalfd(s); | |
1381 | if (r < 0) | |
1382 | return r; | |
1383 | ||
1384 | s->udev = udev_new(); | |
1385 | if (!s->udev) | |
1386 | return -ENOMEM; | |
1387 | ||
1388 | s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst); | |
1389 | if (!s->rate_limit) | |
1390 | return -ENOMEM; | |
1391 | ||
1392 | r = system_journal_open(s); | |
1393 | if (r < 0) | |
1394 | return r; | |
1395 | ||
1396 | return 0; | |
1397 | } | |
1398 | ||
1399 | static void server_maybe_append_tags(Server *s) { | |
1400 | #ifdef HAVE_GCRYPT | |
1401 | JournalFile *f; | |
1402 | Iterator i; | |
1403 | usec_t n; | |
1404 | ||
1405 | n = now(CLOCK_REALTIME); | |
1406 | ||
1407 | if (s->system_journal) | |
1408 | journal_file_maybe_append_tag(s->system_journal, n); | |
1409 | ||
1410 | HASHMAP_FOREACH(f, s->user_journals, i) | |
1411 | journal_file_maybe_append_tag(f, n); | |
1412 | #endif | |
1413 | } | |
1414 | ||
1415 | static void server_done(Server *s) { | |
1416 | JournalFile *f; | |
1417 | assert(s); | |
1418 | ||
1419 | while (s->stdout_streams) | |
1420 | stdout_stream_free(s->stdout_streams); | |
1421 | ||
1422 | if (s->system_journal) | |
1423 | journal_file_close(s->system_journal); | |
1424 | ||
1425 | if (s->runtime_journal) | |
1426 | journal_file_close(s->runtime_journal); | |
1427 | ||
1428 | while ((f = hashmap_steal_first(s->user_journals))) | |
1429 | journal_file_close(f); | |
1430 | ||
1431 | hashmap_free(s->user_journals); | |
1432 | ||
1433 | if (s->epoll_fd >= 0) | |
1434 | close_nointr_nofail(s->epoll_fd); | |
1435 | ||
1436 | if (s->signal_fd >= 0) | |
1437 | close_nointr_nofail(s->signal_fd); | |
1438 | ||
1439 | if (s->syslog_fd >= 0) | |
1440 | close_nointr_nofail(s->syslog_fd); | |
1441 | ||
1442 | if (s->native_fd >= 0) | |
1443 | close_nointr_nofail(s->native_fd); | |
1444 | ||
1445 | if (s->stdout_fd >= 0) | |
1446 | close_nointr_nofail(s->stdout_fd); | |
1447 | ||
1448 | if (s->dev_kmsg_fd >= 0) | |
1449 | close_nointr_nofail(s->dev_kmsg_fd); | |
1450 | ||
1451 | if (s->rate_limit) | |
1452 | journal_rate_limit_free(s->rate_limit); | |
1453 | ||
1454 | if (s->kernel_seqnum) | |
1455 | munmap(s->kernel_seqnum, sizeof(uint64_t)); | |
1456 | ||
1457 | free(s->buffer); | |
1458 | free(s->tty_path); | |
1459 | ||
1460 | if (s->mmap) | |
1461 | mmap_cache_unref(s->mmap); | |
1462 | ||
1463 | if (s->udev) | |
1464 | udev_unref(s->udev); | |
1465 | } | |
1466 | ||
1467 | int main(int argc, char *argv[]) { | |
1468 | Server server; | |
1469 | int r; | |
1470 | ||
1471 | /* if (getppid() != 1) { */ | |
1472 | /* log_error("This program should be invoked by init only."); */ | |
1473 | /* return EXIT_FAILURE; */ | |
1474 | /* } */ | |
1475 | ||
1476 | if (argc > 1) { | |
1477 | log_error("This program does not take arguments."); | |
1478 | return EXIT_FAILURE; | |
1479 | } | |
1480 | ||
1481 | log_set_target(LOG_TARGET_SAFE); | |
1482 | log_set_facility(LOG_SYSLOG); | |
1483 | log_set_max_level(LOG_DEBUG); | |
1484 | log_parse_environment(); | |
1485 | log_open(); | |
1486 | ||
1487 | umask(0022); | |
1488 | ||
1489 | r = server_init(&server); | |
1490 | if (r < 0) | |
1491 | goto finish; | |
1492 | ||
1493 | server_vacuum(&server); | |
1494 | server_flush_to_var(&server); | |
1495 | server_flush_dev_kmsg(&server); | |
1496 | ||
1497 | log_debug("systemd-journald running as pid %lu", (unsigned long) getpid()); | |
1498 | server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started"); | |
1499 | ||
1500 | sd_notify(false, | |
1501 | "READY=1\n" | |
1502 | "STATUS=Processing requests..."); | |
1503 | ||
1504 | for (;;) { | |
1505 | struct epoll_event event; | |
1506 | int t; | |
1507 | ||
1508 | #ifdef HAVE_GCRYPT | |
1509 | usec_t u; | |
1510 | ||
1511 | if (server.system_journal && | |
1512 | journal_file_next_evolve_usec(server.system_journal, &u)) { | |
1513 | usec_t n; | |
1514 | ||
1515 | n = now(CLOCK_REALTIME); | |
1516 | ||
1517 | if (n >= u) | |
1518 | t = 0; | |
1519 | else | |
1520 | t = (int) ((u - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC); | |
1521 | } else | |
1522 | #endif | |
1523 | t = -1; | |
1524 | ||
1525 | r = epoll_wait(server.epoll_fd, &event, 1, t); | |
1526 | if (r < 0) { | |
1527 | ||
1528 | if (errno == EINTR) | |
1529 | continue; | |
1530 | ||
1531 | log_error("epoll_wait() failed: %m"); | |
1532 | r = -errno; | |
1533 | goto finish; | |
1534 | } | |
1535 | ||
1536 | if (r > 0) { | |
1537 | r = process_event(&server, &event); | |
1538 | if (r < 0) | |
1539 | goto finish; | |
1540 | else if (r == 0) | |
1541 | break; | |
1542 | } | |
1543 | ||
1544 | server_maybe_append_tags(&server); | |
1545 | } | |
1546 | ||
1547 | log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid()); | |
1548 | server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped"); | |
1549 | ||
1550 | finish: | |
1551 | sd_notify(false, | |
1552 | "STATUS=Shutting down..."); | |
1553 | ||
1554 | server_done(&server); | |
1555 | ||
1556 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1557 | } |