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87d2c1ff LP |
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 General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU 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> | |
f4b47811 LP |
28 | #include <sys/acl.h> |
29 | #include <acl/libacl.h> | |
7f3e6257 LP |
30 | #include <stddef.h> |
31 | #include <sys/ioctl.h> | |
32 | #include <linux/sockios.h> | |
6e409ce1 | 33 | #include <sys/statvfs.h> |
87d2c1ff LP |
34 | |
35 | #include "hashmap.h" | |
cec736d2 | 36 | #include "journal-file.h" |
87d2c1ff LP |
37 | #include "sd-daemon.h" |
38 | #include "socket-util.h" | |
f4b47811 | 39 | #include "acl-util.h" |
69e5d42d | 40 | #include "cgroup-util.h" |
fe652127 | 41 | #include "list.h" |
6e409ce1 | 42 | #include "journal-rate-limit.h" |
cf244689 | 43 | #include "sd-journal.h" |
85d83bf4 | 44 | #include "sd-login.h" |
cf244689 | 45 | #include "journal-internal.h" |
87d2c1ff | 46 | |
cab8ac60 | 47 | #define USER_JOURNALS_MAX 1024 |
fe652127 LP |
48 | #define STDOUT_STREAMS_MAX 4096 |
49 | ||
de97b26a LP |
50 | #define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC) |
51 | #define DEFAULT_RATE_LIMIT_BURST 200 | |
52 | ||
9cfb57c9 LP |
53 | #define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) |
54 | ||
54a7b863 LP |
55 | #define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC) |
56 | ||
8b18eb67 LP |
57 | #define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC) |
58 | ||
fe652127 | 59 | typedef struct StdoutStream StdoutStream; |
cab8ac60 | 60 | |
87d2c1ff | 61 | typedef struct Server { |
87d2c1ff LP |
62 | int epoll_fd; |
63 | int signal_fd; | |
7f3e6257 LP |
64 | int syslog_fd; |
65 | int native_fd; | |
fe652127 | 66 | int stdout_fd; |
87d2c1ff | 67 | |
f4b47811 | 68 | JournalFile *runtime_journal; |
87d2c1ff LP |
69 | JournalFile *system_journal; |
70 | Hashmap *user_journals; | |
c2373f84 LP |
71 | |
72 | uint64_t seqnum; | |
7f3e6257 LP |
73 | |
74 | char *buffer; | |
75 | size_t buffer_size; | |
bc85bfee | 76 | |
6e409ce1 LP |
77 | JournalRateLimit *rate_limit; |
78 | ||
babfc091 LP |
79 | JournalMetrics runtime_metrics; |
80 | JournalMetrics system_metrics; | |
81 | ||
807e17f0 | 82 | bool compress; |
fe652127 | 83 | |
9cfb57c9 LP |
84 | uint64_t cached_available_space; |
85 | usec_t cached_available_space_timestamp; | |
86 | ||
54a7b863 LP |
87 | uint64_t var_available_timestamp; |
88 | ||
fe652127 LP |
89 | LIST_HEAD(StdoutStream, stdout_streams); |
90 | unsigned n_stdout_streams; | |
87d2c1ff LP |
91 | } Server; |
92 | ||
fe652127 LP |
93 | typedef enum StdoutStreamState { |
94 | STDOUT_STREAM_TAG, | |
95 | STDOUT_STREAM_PRIORITY, | |
96 | STDOUT_STREAM_PRIORITY_PREFIX, | |
97 | STDOUT_STREAM_TEE_CONSOLE, | |
98 | STDOUT_STREAM_RUNNING | |
99 | } StdoutStreamState; | |
100 | ||
101 | struct StdoutStream { | |
102 | Server *server; | |
103 | StdoutStreamState state; | |
104 | ||
105 | int fd; | |
106 | ||
107 | struct ucred ucred; | |
108 | ||
109 | char *tag; | |
110 | int priority; | |
111 | bool priority_prefix:1; | |
112 | bool tee_console:1; | |
113 | ||
114 | char buffer[LINE_MAX+1]; | |
115 | size_t length; | |
116 | ||
117 | LIST_FIELDS(StdoutStream, stdout_stream); | |
118 | }; | |
119 | ||
cf244689 LP |
120 | static int server_flush_to_var(Server *s); |
121 | ||
6e409ce1 | 122 | static uint64_t available_space(Server *s) { |
babfc091 | 123 | char ids[33], *p; |
6e409ce1 | 124 | const char *f; |
babfc091 | 125 | sd_id128_t machine; |
6e409ce1 LP |
126 | struct statvfs ss; |
127 | uint64_t sum = 0, avail = 0, ss_avail = 0; | |
128 | int r; | |
129 | DIR *d; | |
babfc091 LP |
130 | usec_t ts; |
131 | JournalMetrics *m; | |
132 | ||
133 | ts = now(CLOCK_MONOTONIC); | |
9cfb57c9 LP |
134 | |
135 | if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts) | |
136 | return s->cached_available_space; | |
6e409ce1 LP |
137 | |
138 | r = sd_id128_get_machine(&machine); | |
139 | if (r < 0) | |
140 | return 0; | |
141 | ||
babfc091 | 142 | if (s->system_journal) { |
6e409ce1 | 143 | f = "/var/log/journal/"; |
babfc091 LP |
144 | m = &s->system_metrics; |
145 | } else { | |
6e409ce1 | 146 | f = "/run/log/journal/"; |
babfc091 LP |
147 | m = &s->runtime_metrics; |
148 | } | |
149 | ||
150 | assert(m); | |
6e409ce1 LP |
151 | |
152 | p = strappend(f, sd_id128_to_string(machine, ids)); | |
153 | if (!p) | |
154 | return 0; | |
155 | ||
156 | d = opendir(p); | |
157 | free(p); | |
158 | ||
159 | if (!d) | |
160 | return 0; | |
161 | ||
162 | if (fstatvfs(dirfd(d), &ss) < 0) | |
163 | goto finish; | |
164 | ||
165 | for (;;) { | |
166 | struct stat st; | |
167 | struct dirent buf, *de; | |
168 | int k; | |
169 | ||
170 | k = readdir_r(d, &buf, &de); | |
171 | if (k != 0) { | |
172 | r = -k; | |
173 | goto finish; | |
174 | } | |
175 | ||
176 | if (!de) | |
177 | break; | |
178 | ||
179 | if (!dirent_is_file_with_suffix(de, ".journal")) | |
180 | continue; | |
181 | ||
182 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
183 | continue; | |
184 | ||
185 | sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize; | |
186 | } | |
187 | ||
babfc091 | 188 | avail = sum >= m->max_use ? 0 : m->max_use - sum; |
6e409ce1 LP |
189 | |
190 | ss_avail = ss.f_bsize * ss.f_bavail; | |
191 | ||
babfc091 | 192 | ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free; |
6e409ce1 LP |
193 | |
194 | if (ss_avail < avail) | |
195 | avail = ss_avail; | |
196 | ||
9cfb57c9 LP |
197 | s->cached_available_space = avail; |
198 | s->cached_available_space_timestamp = ts; | |
199 | ||
6e409ce1 LP |
200 | finish: |
201 | closedir(d); | |
202 | ||
203 | return avail; | |
204 | } | |
205 | ||
f4b47811 LP |
206 | static void fix_perms(JournalFile *f, uid_t uid) { |
207 | acl_t acl; | |
208 | acl_entry_t entry; | |
209 | acl_permset_t permset; | |
210 | int r; | |
211 | ||
212 | assert(f); | |
213 | ||
214 | r = fchmod_and_fchown(f->fd, 0640, 0, 0); | |
215 | if (r < 0) | |
216 | log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r)); | |
217 | ||
218 | if (uid <= 0) | |
219 | return; | |
220 | ||
221 | acl = acl_get_fd(f->fd); | |
222 | if (!acl) { | |
223 | log_warning("Failed to read ACL on %s, ignoring: %m", f->path); | |
224 | return; | |
225 | } | |
226 | ||
227 | r = acl_find_uid(acl, uid, &entry); | |
228 | if (r <= 0) { | |
229 | ||
230 | if (acl_create_entry(&acl, &entry) < 0 || | |
231 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
232 | acl_set_qualifier(entry, &uid) < 0) { | |
233 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
234 | goto finish; | |
235 | } | |
236 | } | |
237 | ||
238 | if (acl_get_permset(entry, &permset) < 0 || | |
239 | acl_add_perm(permset, ACL_READ) < 0 || | |
240 | acl_calc_mask(&acl) < 0) { | |
241 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
242 | goto finish; | |
243 | } | |
244 | ||
245 | if (acl_set_fd(f->fd, acl) < 0) | |
246 | log_warning("Failed to set ACL on %s, ignoring: %m", f->path); | |
247 | ||
248 | finish: | |
249 | acl_free(acl); | |
250 | } | |
251 | ||
252 | static JournalFile* find_journal(Server *s, uid_t uid) { | |
253 | char *p; | |
254 | int r; | |
255 | JournalFile *f; | |
3fbf9cbb LP |
256 | char ids[33]; |
257 | sd_id128_t machine; | |
f4b47811 LP |
258 | |
259 | assert(s); | |
260 | ||
cf244689 LP |
261 | /* We split up user logs only on /var, not on /run. If the |
262 | * runtime file is open, we write to it exclusively, in order | |
263 | * to guarantee proper order as soon as we flush /run to | |
264 | * /var and close the runtime file. */ | |
265 | ||
266 | if (s->runtime_journal) | |
f4b47811 LP |
267 | return s->runtime_journal; |
268 | ||
269 | if (uid <= 0) | |
270 | return s->system_journal; | |
271 | ||
3fbf9cbb LP |
272 | r = sd_id128_get_machine(&machine); |
273 | if (r < 0) | |
274 | return s->system_journal; | |
275 | ||
f4b47811 LP |
276 | f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid)); |
277 | if (f) | |
278 | return f; | |
279 | ||
3fbf9cbb | 280 | if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0) |
f4b47811 LP |
281 | return s->system_journal; |
282 | ||
cab8ac60 LP |
283 | while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) { |
284 | /* Too many open? Then let's close one */ | |
285 | f = hashmap_steal_first(s->user_journals); | |
286 | assert(f); | |
287 | journal_file_close(f); | |
288 | } | |
289 | ||
c2373f84 | 290 | r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f); |
f4b47811 LP |
291 | free(p); |
292 | ||
293 | if (r < 0) | |
294 | return s->system_journal; | |
295 | ||
296 | fix_perms(f, uid); | |
babfc091 | 297 | f->metrics = s->system_metrics; |
807e17f0 | 298 | f->compress = s->compress; |
f4b47811 LP |
299 | |
300 | r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f); | |
301 | if (r < 0) { | |
302 | journal_file_close(f); | |
303 | return s->system_journal; | |
304 | } | |
305 | ||
306 | return f; | |
307 | } | |
308 | ||
bc85bfee LP |
309 | static void server_vacuum(Server *s) { |
310 | Iterator i; | |
311 | void *k; | |
312 | char *p; | |
313 | char ids[33]; | |
314 | sd_id128_t machine; | |
315 | int r; | |
316 | JournalFile *f; | |
317 | ||
318 | log_info("Rotating..."); | |
319 | ||
320 | if (s->runtime_journal) { | |
321 | r = journal_file_rotate(&s->runtime_journal); | |
322 | if (r < 0) | |
323 | log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r)); | |
324 | } | |
325 | ||
326 | if (s->system_journal) { | |
327 | r = journal_file_rotate(&s->system_journal); | |
328 | if (r < 0) | |
329 | log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r)); | |
330 | } | |
331 | ||
332 | HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { | |
333 | r = journal_file_rotate(&f); | |
334 | if (r < 0) | |
335 | log_error("Failed to rotate %s: %s", f->path, strerror(-r)); | |
336 | else | |
337 | hashmap_replace(s->user_journals, k, f); | |
338 | } | |
339 | ||
340 | log_info("Vacuuming..."); | |
341 | ||
342 | r = sd_id128_get_machine(&machine); | |
343 | if (r < 0) { | |
344 | log_error("Failed to get machine ID: %s", strerror(-r)); | |
345 | return; | |
346 | } | |
347 | ||
babfc091 | 348 | sd_id128_to_string(machine, ids); |
bc85bfee | 349 | |
babfc091 LP |
350 | if (s->system_journal) { |
351 | if (asprintf(&p, "/var/log/journal/%s", ids) < 0) { | |
352 | log_error("Out of memory."); | |
353 | return; | |
354 | } | |
bc85bfee | 355 | |
babfc091 LP |
356 | r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free); |
357 | if (r < 0 && r != -ENOENT) | |
358 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
359 | free(p); | |
bc85bfee LP |
360 | } |
361 | ||
babfc091 LP |
362 | |
363 | if (s->runtime_journal) { | |
364 | if (asprintf(&p, "/run/log/journal/%s", ids) < 0) { | |
365 | log_error("Out of memory."); | |
366 | return; | |
367 | } | |
368 | ||
369 | r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free); | |
370 | if (r < 0 && r != -ENOENT) | |
371 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
372 | free(p); | |
373 | } | |
9cfb57c9 LP |
374 | |
375 | s->cached_available_space_timestamp = 0; | |
bc85bfee LP |
376 | } |
377 | ||
6e409ce1 LP |
378 | static char *shortened_cgroup_path(pid_t pid) { |
379 | int r; | |
380 | char *process_path, *init_path, *path; | |
381 | ||
382 | assert(pid > 0); | |
383 | ||
384 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path); | |
385 | if (r < 0) | |
386 | return NULL; | |
387 | ||
388 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path); | |
389 | if (r < 0) { | |
390 | free(process_path); | |
391 | return NULL; | |
392 | } | |
393 | ||
bad75c27 LP |
394 | if (endswith(init_path, "/system")) |
395 | init_path[strlen(init_path) - 7] = 0; | |
396 | else if (streq(init_path, "/")) | |
6e409ce1 LP |
397 | init_path[0] = 0; |
398 | ||
783d2675 LP |
399 | if (startswith(process_path, init_path)) { |
400 | char *p; | |
401 | ||
402 | p = strdup(process_path + strlen(init_path)); | |
403 | if (!p) { | |
404 | free(process_path); | |
405 | free(init_path); | |
406 | return NULL; | |
407 | } | |
408 | path = p; | |
409 | } else { | |
6e409ce1 | 410 | path = process_path; |
783d2675 LP |
411 | process_path = NULL; |
412 | } | |
6e409ce1 | 413 | |
783d2675 | 414 | free(process_path); |
6e409ce1 LP |
415 | free(init_path); |
416 | ||
417 | return path; | |
418 | } | |
419 | ||
420 | static void dispatch_message_real(Server *s, | |
421 | struct iovec *iovec, unsigned n, unsigned m, | |
422 | struct ucred *ucred, | |
423 | struct timeval *tv) { | |
424 | ||
7f3e6257 | 425 | char *pid = NULL, *uid = NULL, *gid = NULL, |
87d2c1ff LP |
426 | *source_time = NULL, *boot_id = NULL, *machine_id = NULL, |
427 | *comm = NULL, *cmdline = NULL, *hostname = NULL, | |
428 | *audit_session = NULL, *audit_loginuid = NULL, | |
85d83bf4 LP |
429 | *exe = NULL, *cgroup = NULL, *session = NULL, |
430 | *owner_uid = NULL, *service = NULL; | |
7f3e6257 | 431 | |
87d2c1ff LP |
432 | char idbuf[33]; |
433 | sd_id128_t id; | |
434 | int r; | |
435 | char *t; | |
de190aef | 436 | uid_t loginuid = 0, realuid = 0; |
f4b47811 | 437 | JournalFile *f; |
bc85bfee | 438 | bool vacuumed = false; |
87d2c1ff | 439 | |
7f3e6257 | 440 | assert(s); |
6e409ce1 LP |
441 | assert(iovec); |
442 | assert(n > 0); | |
85d83bf4 | 443 | assert(n + 16 <= m); |
87d2c1ff LP |
444 | |
445 | if (ucred) { | |
85d83bf4 LP |
446 | uint32_t audit; |
447 | uid_t owner; | |
87d2c1ff | 448 | |
de190aef LP |
449 | realuid = ucred->uid; |
450 | ||
451 | if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0) | |
87d2c1ff LP |
452 | IOVEC_SET_STRING(iovec[n++], pid); |
453 | ||
de190aef | 454 | if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0) |
87d2c1ff LP |
455 | IOVEC_SET_STRING(iovec[n++], uid); |
456 | ||
de190aef | 457 | if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0) |
87d2c1ff LP |
458 | IOVEC_SET_STRING(iovec[n++], gid); |
459 | ||
460 | r = get_process_comm(ucred->pid, &t); | |
461 | if (r >= 0) { | |
de190aef | 462 | comm = strappend("_COMM=", t); |
85d83bf4 LP |
463 | free(t); |
464 | ||
87d2c1ff LP |
465 | if (comm) |
466 | IOVEC_SET_STRING(iovec[n++], comm); | |
87d2c1ff LP |
467 | } |
468 | ||
469 | r = get_process_exe(ucred->pid, &t); | |
470 | if (r >= 0) { | |
de190aef | 471 | exe = strappend("_EXE=", t); |
85d83bf4 LP |
472 | free(t); |
473 | ||
87d2c1ff LP |
474 | if (comm) |
475 | IOVEC_SET_STRING(iovec[n++], exe); | |
87d2c1ff LP |
476 | } |
477 | ||
478 | r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t); | |
479 | if (r >= 0) { | |
de190aef | 480 | cmdline = strappend("_CMDLINE=", t); |
85d83bf4 LP |
481 | free(t); |
482 | ||
87d2c1ff LP |
483 | if (cmdline) |
484 | IOVEC_SET_STRING(iovec[n++], cmdline); | |
87d2c1ff LP |
485 | } |
486 | ||
85d83bf4 | 487 | r = audit_session_from_pid(ucred->pid, &audit); |
87d2c1ff | 488 | if (r >= 0) |
85d83bf4 | 489 | if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0) |
87d2c1ff LP |
490 | IOVEC_SET_STRING(iovec[n++], audit_session); |
491 | ||
492 | r = audit_loginuid_from_pid(ucred->pid, &loginuid); | |
493 | if (r >= 0) | |
de190aef | 494 | if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0) |
87d2c1ff | 495 | IOVEC_SET_STRING(iovec[n++], audit_loginuid); |
69e5d42d | 496 | |
85d83bf4 LP |
497 | t = shortened_cgroup_path(ucred->pid); |
498 | if (t) { | |
499 | cgroup = strappend("_SYSTEMD_CGROUP=", t); | |
500 | free(t); | |
501 | ||
69e5d42d LP |
502 | if (cgroup) |
503 | IOVEC_SET_STRING(iovec[n++], cgroup); | |
85d83bf4 LP |
504 | } |
505 | ||
506 | if (sd_pid_get_session(ucred->pid, &t) >= 0) { | |
507 | session = strappend("_SYSTEMD_SESSION=", t); | |
508 | free(t); | |
509 | ||
510 | if (session) | |
511 | IOVEC_SET_STRING(iovec[n++], session); | |
512 | } | |
6e409ce1 | 513 | |
85d83bf4 LP |
514 | if (sd_pid_get_service(ucred->pid, &t) >= 0) { |
515 | service = strappend("_SYSTEMD_SERVICE=", t); | |
516 | free(t); | |
517 | ||
518 | if (service) | |
519 | IOVEC_SET_STRING(iovec[n++], service); | |
69e5d42d | 520 | } |
85d83bf4 LP |
521 | |
522 | if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0) | |
523 | if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0) | |
524 | IOVEC_SET_STRING(iovec[n++], owner_uid); | |
87d2c1ff LP |
525 | } |
526 | ||
527 | if (tv) { | |
de190aef | 528 | if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", |
87d2c1ff LP |
529 | (unsigned long long) timeval_load(tv)) >= 0) |
530 | IOVEC_SET_STRING(iovec[n++], source_time); | |
531 | } | |
532 | ||
ed49ef3f LP |
533 | /* Note that strictly speaking storing the boot id here is |
534 | * redundant since the entry includes this in-line | |
535 | * anyway. However, we need this indexed, too. */ | |
87d2c1ff LP |
536 | r = sd_id128_get_boot(&id); |
537 | if (r >= 0) | |
de190aef | 538 | if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) |
87d2c1ff LP |
539 | IOVEC_SET_STRING(iovec[n++], boot_id); |
540 | ||
541 | r = sd_id128_get_machine(&id); | |
542 | if (r >= 0) | |
de190aef | 543 | if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0) |
87d2c1ff LP |
544 | IOVEC_SET_STRING(iovec[n++], machine_id); |
545 | ||
546 | t = gethostname_malloc(); | |
547 | if (t) { | |
de190aef | 548 | hostname = strappend("_HOSTNAME=", t); |
85d83bf4 | 549 | free(t); |
87d2c1ff LP |
550 | if (hostname) |
551 | IOVEC_SET_STRING(iovec[n++], hostname); | |
87d2c1ff LP |
552 | } |
553 | ||
7f3e6257 LP |
554 | assert(n <= m); |
555 | ||
cf244689 LP |
556 | server_flush_to_var(s); |
557 | ||
bc85bfee | 558 | retry: |
de190aef | 559 | f = find_journal(s, realuid == 0 ? 0 : loginuid); |
f4b47811 LP |
560 | if (!f) |
561 | log_warning("Dropping message, as we can't find a place to store the data."); | |
562 | else { | |
c2373f84 | 563 | r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL); |
87d2c1ff | 564 | |
bc85bfee LP |
565 | if (r == -E2BIG && !vacuumed) { |
566 | log_info("Allocation limit reached."); | |
567 | ||
568 | server_vacuum(s); | |
569 | vacuumed = true; | |
570 | ||
571 | log_info("Retrying write."); | |
572 | goto retry; | |
573 | } | |
574 | ||
f4b47811 LP |
575 | if (r < 0) |
576 | log_error("Failed to write entry, ignoring: %s", strerror(-r)); | |
577 | } | |
87d2c1ff | 578 | |
87d2c1ff LP |
579 | free(pid); |
580 | free(uid); | |
581 | free(gid); | |
582 | free(comm); | |
69e5d42d | 583 | free(exe); |
87d2c1ff LP |
584 | free(cmdline); |
585 | free(source_time); | |
586 | free(boot_id); | |
587 | free(machine_id); | |
588 | free(hostname); | |
589 | free(audit_session); | |
590 | free(audit_loginuid); | |
7f3e6257 | 591 | free(cgroup); |
85d83bf4 LP |
592 | free(session); |
593 | free(owner_uid); | |
594 | free(service); | |
7f3e6257 LP |
595 | } |
596 | ||
6e409ce1 LP |
597 | static void dispatch_message(Server *s, |
598 | struct iovec *iovec, unsigned n, unsigned m, | |
599 | struct ucred *ucred, | |
600 | struct timeval *tv, | |
601 | int priority) { | |
602 | int rl; | |
783d2675 | 603 | char *path = NULL, *c; |
6e409ce1 LP |
604 | |
605 | assert(s); | |
606 | assert(iovec || n == 0); | |
607 | ||
608 | if (n == 0) | |
609 | return; | |
610 | ||
611 | if (!ucred) | |
612 | goto finish; | |
613 | ||
614 | path = shortened_cgroup_path(ucred->pid); | |
615 | if (!path) | |
616 | goto finish; | |
617 | ||
618 | /* example: /user/lennart/3/foobar | |
619 | * /system/dbus.service/foobar | |
620 | * | |
621 | * So let's cut of everything past the third /, since that is | |
622 | * wher user directories start */ | |
623 | ||
624 | c = strchr(path, '/'); | |
625 | if (c) { | |
626 | c = strchr(c+1, '/'); | |
627 | if (c) { | |
628 | c = strchr(c+1, '/'); | |
629 | if (c) | |
630 | *c = 0; | |
631 | } | |
632 | } | |
633 | ||
634 | rl = journal_rate_limit_test(s->rate_limit, path, priority, available_space(s)); | |
635 | ||
636 | if (rl == 0) { | |
637 | free(path); | |
638 | return; | |
639 | } | |
640 | ||
641 | if (rl > 1) { | |
642 | int j = 0; | |
643 | char suppress_message[LINE_MAX]; | |
85d83bf4 | 644 | struct iovec suppress_iovec[18]; |
6e409ce1 LP |
645 | |
646 | /* Write a suppression message if we suppressed something */ | |
647 | ||
648 | snprintf(suppress_message, sizeof(suppress_message), "MESSAGE=Suppressed %u messages from %s", rl - 1, path); | |
649 | char_array_0(suppress_message); | |
650 | ||
651 | IOVEC_SET_STRING(suppress_iovec[j++], "PRIORITY=5"); | |
652 | IOVEC_SET_STRING(suppress_iovec[j++], suppress_message); | |
653 | ||
654 | dispatch_message_real(s, suppress_iovec, j, ELEMENTSOF(suppress_iovec), NULL, NULL); | |
655 | } | |
656 | ||
657 | free(path); | |
658 | ||
659 | finish: | |
660 | dispatch_message_real(s, iovec, n, m, ucred, tv); | |
661 | } | |
662 | ||
7f3e6257 LP |
663 | static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) { |
664 | char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL; | |
85d83bf4 | 665 | struct iovec iovec[19]; |
7f3e6257 LP |
666 | unsigned n = 0; |
667 | int priority = LOG_USER | LOG_INFO; | |
668 | ||
669 | assert(s); | |
670 | assert(buf); | |
671 | ||
672 | parse_syslog_priority((char**) &buf, &priority); | |
673 | skip_syslog_date((char**) &buf); | |
674 | ||
675 | if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) | |
676 | IOVEC_SET_STRING(iovec[n++], syslog_priority); | |
677 | ||
678 | if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) | |
679 | IOVEC_SET_STRING(iovec[n++], syslog_facility); | |
680 | ||
681 | message = strappend("MESSAGE=", buf); | |
682 | if (message) | |
683 | IOVEC_SET_STRING(iovec[n++], message); | |
684 | ||
6e409ce1 | 685 | dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, priority & LOG_PRIMASK); |
7f3e6257 LP |
686 | |
687 | free(message); | |
87d2c1ff LP |
688 | free(syslog_facility); |
689 | free(syslog_priority); | |
7f3e6257 LP |
690 | } |
691 | ||
6ad1d1c3 LP |
692 | static bool valid_user_field(const char *p, size_t l) { |
693 | const char *a; | |
694 | ||
695 | /* We kinda enforce POSIX syntax recommendations for | |
696 | environment variables here, but make a couple of additional | |
697 | requirements. | |
698 | ||
699 | http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */ | |
700 | ||
701 | /* No empty field names */ | |
702 | if (l <= 0) | |
703 | return false; | |
704 | ||
705 | /* Don't allow names longer than 64 chars */ | |
706 | if (l > 64) | |
707 | return false; | |
708 | ||
709 | /* Variables starting with an underscore are protected */ | |
710 | if (p[0] == '_') | |
711 | return false; | |
712 | ||
713 | /* Don't allow digits as first character */ | |
714 | if (p[0] >= '0' && p[0] <= '9') | |
715 | return false; | |
716 | ||
717 | /* Only allow A-Z0-9 and '_' */ | |
718 | for (a = p; a < p + l; a++) | |
719 | if (!((*a >= 'A' && *a <= 'Z') || | |
720 | (*a >= '0' && *a <= '9') || | |
721 | *a == '_')) | |
722 | return false; | |
723 | ||
724 | return true; | |
725 | } | |
726 | ||
7f3e6257 LP |
727 | static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) { |
728 | struct iovec *iovec = NULL; | |
729 | unsigned n = 0, m = 0, j; | |
730 | const char *p; | |
731 | size_t remaining; | |
6e409ce1 | 732 | int priority = LOG_INFO; |
7f3e6257 LP |
733 | |
734 | assert(s); | |
735 | assert(buffer || n == 0); | |
736 | ||
737 | p = buffer; | |
738 | remaining = buffer_size; | |
739 | ||
740 | while (remaining > 0) { | |
741 | const char *e, *q; | |
742 | ||
743 | e = memchr(p, '\n', remaining); | |
744 | ||
745 | if (!e) { | |
746 | /* Trailing noise, let's ignore it, and flush what we collected */ | |
747 | log_debug("Received message with trailing noise, ignoring."); | |
748 | break; | |
749 | } | |
750 | ||
751 | if (e == p) { | |
752 | /* Entry separator */ | |
6e409ce1 | 753 | dispatch_message(s, iovec, n, m, ucred, tv, priority); |
7f3e6257 | 754 | n = 0; |
6e409ce1 | 755 | priority = LOG_INFO; |
7f3e6257 LP |
756 | |
757 | p++; | |
758 | remaining--; | |
759 | continue; | |
760 | } | |
761 | ||
6ad1d1c3 LP |
762 | if (*p == '.' || *p == '#') { |
763 | /* Ignore control commands for now, and | |
764 | * comments too. */ | |
7f3e6257 LP |
765 | remaining -= (e - p) + 1; |
766 | p = e + 1; | |
767 | continue; | |
768 | } | |
769 | ||
770 | /* A property follows */ | |
771 | ||
85d83bf4 | 772 | if (n+16 >= m) { |
7f3e6257 LP |
773 | struct iovec *c; |
774 | unsigned u; | |
775 | ||
85d83bf4 | 776 | u = MAX((n+16U) * 2U, 4U); |
7f3e6257 LP |
777 | c = realloc(iovec, u * sizeof(struct iovec)); |
778 | if (!c) { | |
779 | log_error("Out of memory"); | |
780 | break; | |
781 | } | |
782 | ||
783 | iovec = c; | |
784 | m = u; | |
785 | } | |
786 | ||
787 | q = memchr(p, '=', e - p); | |
788 | if (q) { | |
6ad1d1c3 | 789 | if (valid_user_field(p, q - p)) { |
2b0ba69b LP |
790 | /* If the field name starts with an |
791 | * underscore, skip the variable, | |
792 | * since that indidates a trusted | |
793 | * field */ | |
794 | iovec[n].iov_base = (char*) p; | |
795 | iovec[n].iov_len = e - p; | |
796 | n++; | |
6e409ce1 LP |
797 | |
798 | /* We need to determine the priority | |
799 | * of this entry for the rate limiting | |
800 | * logic */ | |
801 | if (e - p == 10 && | |
802 | memcmp(p, "PRIORITY=", 10) == 0 && | |
803 | p[10] >= '0' && | |
804 | p[10] <= '9') | |
805 | priority = p[10] - '0'; | |
2b0ba69b | 806 | } |
7f3e6257 LP |
807 | |
808 | remaining -= (e - p) + 1; | |
809 | p = e + 1; | |
810 | continue; | |
811 | } else { | |
812 | uint64_t l; | |
813 | char *k; | |
814 | ||
815 | if (remaining < e - p + 1 + sizeof(uint64_t) + 1) { | |
816 | log_debug("Failed to parse message, ignoring."); | |
817 | break; | |
818 | } | |
819 | ||
820 | memcpy(&l, e + 1, sizeof(uint64_t)); | |
821 | l = le64toh(l); | |
822 | ||
823 | if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 || | |
824 | e[1+sizeof(uint64_t)+l] != '\n') { | |
825 | log_debug("Failed to parse message, ignoring."); | |
826 | break; | |
827 | } | |
828 | ||
829 | k = malloc((e - p) + 1 + l); | |
830 | if (!k) { | |
831 | log_error("Out of memory"); | |
832 | break; | |
833 | } | |
834 | ||
835 | memcpy(k, p, e - p); | |
836 | k[e - p] = '='; | |
837 | memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l); | |
838 | ||
6ad1d1c3 | 839 | if (valid_user_field(p, e - p)) { |
2b0ba69b LP |
840 | iovec[n].iov_base = k; |
841 | iovec[n].iov_len = (e - p) + 1 + l; | |
842 | n++; | |
843 | } else | |
844 | free(k); | |
7f3e6257 LP |
845 | |
846 | remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1; | |
847 | p = e + 1 + sizeof(uint64_t) + l + 1; | |
848 | } | |
849 | } | |
850 | ||
6e409ce1 | 851 | dispatch_message(s, iovec, n, m, ucred, tv, priority); |
7f3e6257 LP |
852 | |
853 | for (j = 0; j < n; j++) | |
854 | if (iovec[j].iov_base < buffer || | |
855 | (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size) | |
856 | free(iovec[j].iov_base); | |
87d2c1ff LP |
857 | } |
858 | ||
fe652127 | 859 | static int stdout_stream_log(StdoutStream *s, const char *p, size_t l) { |
85d83bf4 | 860 | struct iovec iovec[18]; |
fe652127 LP |
861 | char *message = NULL, *syslog_priority = NULL; |
862 | unsigned n = 0; | |
863 | size_t tag_len; | |
864 | int priority; | |
865 | ||
87d2c1ff | 866 | assert(s); |
fe652127 LP |
867 | assert(p); |
868 | ||
869 | priority = s->priority; | |
870 | ||
871 | if (s->priority_prefix && | |
872 | l > 3 && | |
873 | p[0] == '<' && | |
874 | p[1] >= '0' && p[1] <= '7' && | |
875 | p[2] == '>') { | |
876 | ||
877 | priority = p[1] - '0'; | |
878 | p += 3; | |
879 | l -= 3; | |
880 | } | |
881 | ||
882 | if (l <= 0) | |
883 | return 0; | |
884 | ||
885 | if (asprintf(&syslog_priority, "PRIORITY=%i", priority) >= 0) | |
886 | IOVEC_SET_STRING(iovec[n++], syslog_priority); | |
887 | ||
888 | tag_len = s->tag ? strlen(s->tag) + 2: 0; | |
889 | message = malloc(8 + tag_len + l); | |
890 | if (message) { | |
891 | memcpy(message, "MESSAGE=", 8); | |
892 | ||
893 | if (s->tag) { | |
894 | memcpy(message+8, s->tag, tag_len-2); | |
895 | memcpy(message+8+tag_len-2, ": ", 2); | |
896 | } | |
87d2c1ff | 897 | |
fe652127 LP |
898 | memcpy(message+8+tag_len, p, l); |
899 | iovec[n].iov_base = message; | |
900 | iovec[n].iov_len = 8+tag_len+l; | |
901 | n++; | |
87d2c1ff LP |
902 | } |
903 | ||
6e409ce1 | 904 | dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority); |
fe652127 LP |
905 | |
906 | if (s->tee_console) { | |
907 | int console; | |
908 | ||
909 | console = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); | |
910 | if (console >= 0) { | |
911 | n = 0; | |
912 | if (s->tag) { | |
913 | IOVEC_SET_STRING(iovec[n++], s->tag); | |
914 | IOVEC_SET_STRING(iovec[n++], ": "); | |
915 | } | |
916 | ||
917 | iovec[n].iov_base = (void*) p; | |
918 | iovec[n].iov_len = l; | |
919 | n++; | |
920 | ||
921 | IOVEC_SET_STRING(iovec[n++], (char*) "\n"); | |
922 | ||
923 | writev(console, iovec, n); | |
924 | } | |
925 | } | |
926 | ||
927 | free(message); | |
928 | free(syslog_priority); | |
929 | ||
930 | return 0; | |
931 | } | |
932 | ||
933 | static int stdout_stream_line(StdoutStream *s, const char *p, size_t l) { | |
934 | assert(s); | |
935 | assert(p); | |
936 | ||
937 | while (l > 0 && strchr(WHITESPACE, *p)) { | |
938 | l--; | |
939 | p++; | |
940 | } | |
941 | ||
942 | while (l > 0 && strchr(WHITESPACE, *(p+l-1))) | |
943 | l--; | |
944 | ||
945 | switch (s->state) { | |
946 | ||
947 | case STDOUT_STREAM_TAG: | |
948 | ||
949 | if (l > 0) { | |
950 | s->tag = strndup(p, l); | |
951 | if (!s->tag) { | |
952 | log_error("Out of memory"); | |
953 | return -EINVAL; | |
954 | } | |
955 | } | |
956 | ||
957 | s->state = STDOUT_STREAM_PRIORITY; | |
958 | return 0; | |
959 | ||
960 | case STDOUT_STREAM_PRIORITY: | |
961 | if (l != 1 || *p < '0' || *p > '7') { | |
962 | log_warning("Failed to parse log priority line."); | |
963 | return -EINVAL; | |
964 | } | |
965 | ||
966 | s->priority = *p - '0'; | |
967 | s->state = STDOUT_STREAM_PRIORITY_PREFIX; | |
968 | return 0; | |
969 | ||
970 | case STDOUT_STREAM_PRIORITY_PREFIX: | |
971 | if (l != 1 || *p < '0' || *p > '1') { | |
972 | log_warning("Failed to parse priority prefix line."); | |
973 | return -EINVAL; | |
974 | } | |
975 | ||
976 | s->priority_prefix = *p - '0'; | |
977 | s->state = STDOUT_STREAM_TEE_CONSOLE; | |
978 | return 0; | |
979 | ||
980 | case STDOUT_STREAM_TEE_CONSOLE: | |
981 | if (l != 1 || *p < '0' || *p > '1') { | |
982 | log_warning("Failed to parse tee to console line."); | |
983 | return -EINVAL; | |
984 | } | |
985 | ||
986 | s->tee_console = *p - '0'; | |
987 | s->state = STDOUT_STREAM_RUNNING; | |
988 | return 0; | |
989 | ||
990 | case STDOUT_STREAM_RUNNING: | |
991 | return stdout_stream_log(s, p, l); | |
992 | } | |
993 | ||
994 | assert_not_reached("Unknown stream state"); | |
995 | } | |
996 | ||
997 | static int stdout_stream_scan(StdoutStream *s, bool force_flush) { | |
998 | char *p; | |
999 | size_t remaining; | |
1000 | int r; | |
1001 | ||
1002 | assert(s); | |
1003 | ||
1004 | p = s->buffer; | |
1005 | remaining = s->length; | |
1006 | for (;;) { | |
1007 | char *end; | |
1008 | size_t skip; | |
1009 | ||
1010 | end = memchr(p, '\n', remaining); | |
1011 | if (!end) { | |
1012 | if (remaining >= LINE_MAX) { | |
1013 | end = p + LINE_MAX; | |
1014 | skip = LINE_MAX; | |
1015 | } else | |
1016 | break; | |
1017 | } else | |
1018 | skip = end - p + 1; | |
1019 | ||
1020 | r = stdout_stream_line(s, p, end - p); | |
1021 | if (r < 0) | |
1022 | return r; | |
1023 | ||
1024 | remaining -= skip; | |
1025 | p += skip; | |
1026 | } | |
1027 | ||
1028 | if (force_flush && remaining > 0) { | |
1029 | r = stdout_stream_line(s, p, remaining); | |
1030 | if (r < 0) | |
1031 | return r; | |
1032 | ||
1033 | p += remaining; | |
1034 | remaining = 0; | |
1035 | } | |
1036 | ||
1037 | if (p > s->buffer) { | |
1038 | memmove(s->buffer, p, remaining); | |
1039 | s->length = remaining; | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | } | |
1044 | ||
1045 | static int stdout_stream_process(StdoutStream *s) { | |
1046 | ssize_t l; | |
1047 | int r; | |
1048 | ||
1049 | assert(s); | |
1050 | ||
1051 | l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length); | |
1052 | if (l < 0) { | |
1053 | ||
1054 | if (errno == EAGAIN) | |
1055 | return 0; | |
1056 | ||
1057 | log_warning("Failed to read from stream: %m"); | |
1058 | return -errno; | |
1059 | } | |
1060 | ||
1061 | if (l == 0) { | |
1062 | r = stdout_stream_scan(s, true); | |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | s->length += l; | |
1070 | r = stdout_stream_scan(s, false); | |
1071 | if (r < 0) | |
1072 | return r; | |
1073 | ||
1074 | return 1; | |
1075 | ||
1076 | } | |
1077 | ||
1078 | static void stdout_stream_free(StdoutStream *s) { | |
1079 | assert(s); | |
1080 | ||
1081 | if (s->server) { | |
1082 | assert(s->server->n_stdout_streams > 0); | |
1083 | s->server->n_stdout_streams --; | |
1084 | LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s); | |
1085 | } | |
1086 | ||
1087 | if (s->fd >= 0) { | |
1088 | if (s->server) | |
1089 | epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL); | |
1090 | ||
1091 | close_nointr_nofail(s->fd); | |
1092 | } | |
1093 | ||
1094 | free(s->tag); | |
1095 | free(s); | |
1096 | } | |
1097 | ||
1098 | static int stdout_stream_new(Server *s) { | |
1099 | StdoutStream *stream; | |
1100 | int fd, r; | |
1101 | socklen_t len; | |
1102 | struct epoll_event ev; | |
1103 | ||
1104 | assert(s); | |
1105 | ||
1106 | fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); | |
1107 | if (fd < 0) { | |
1108 | if (errno == EAGAIN) | |
1109 | return 0; | |
1110 | ||
1111 | log_error("Failed to accept stdout connection: %m"); | |
1112 | return -errno; | |
1113 | } | |
1114 | ||
1115 | if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { | |
1116 | log_warning("Too many stdout streams, refusing connection."); | |
1117 | close_nointr_nofail(fd); | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | stream = new0(StdoutStream, 1); | |
1122 | if (!stream) { | |
1123 | log_error("Out of memory."); | |
1124 | close_nointr_nofail(fd); | |
1125 | return -ENOMEM; | |
1126 | } | |
1127 | ||
1128 | stream->fd = fd; | |
1129 | ||
1130 | len = sizeof(stream->ucred); | |
1131 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) { | |
1132 | log_error("Failed to determine peer credentials: %m"); | |
1133 | r = -errno; | |
1134 | goto fail; | |
1135 | } | |
1136 | ||
1137 | if (shutdown(fd, SHUT_WR) < 0) { | |
1138 | log_error("Failed to shutdown writing side of socket: %m"); | |
1139 | r = -errno; | |
1140 | goto fail; | |
1141 | } | |
1142 | ||
1143 | zero(ev); | |
1144 | ev.data.ptr = stream; | |
1145 | ev.events = EPOLLIN; | |
1146 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) { | |
1147 | log_error("Failed to add stream to event loop: %m"); | |
1148 | r = -errno; | |
1149 | goto fail; | |
1150 | } | |
1151 | ||
1152 | stream->server = s; | |
1153 | LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream); | |
1154 | s->n_stdout_streams ++; | |
1155 | ||
1156 | return 0; | |
1157 | ||
1158 | fail: | |
1159 | stdout_stream_free(stream); | |
1160 | return r; | |
1161 | } | |
1162 | ||
cf244689 LP |
1163 | static int system_journal_open(Server *s) { |
1164 | int r; | |
1165 | char *fn; | |
1166 | sd_id128_t machine; | |
1167 | char ids[33]; | |
1168 | ||
1169 | r = sd_id128_get_machine(&machine); | |
1170 | if (r < 0) | |
1171 | return r; | |
1172 | ||
1173 | sd_id128_to_string(machine, ids); | |
1174 | ||
1175 | if (!s->system_journal) { | |
1176 | ||
1177 | /* First try to create the machine path, but not the prefix */ | |
1178 | fn = strappend("/var/log/journal/", ids); | |
1179 | if (!fn) | |
1180 | return -ENOMEM; | |
1181 | (void) mkdir(fn, 0755); | |
1182 | free(fn); | |
1183 | ||
1184 | /* The create the system journal file */ | |
1185 | fn = join("/var/log/journal/", ids, "/system.journal", NULL); | |
1186 | if (!fn) | |
1187 | return -ENOMEM; | |
1188 | ||
1189 | r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal); | |
1190 | free(fn); | |
1191 | ||
1192 | if (r >= 0) { | |
babfc091 LP |
1193 | journal_default_metrics(&s->system_metrics, s->system_journal->fd); |
1194 | ||
1195 | s->system_journal->metrics = s->system_metrics; | |
cf244689 LP |
1196 | s->system_journal->compress = s->compress; |
1197 | ||
1198 | fix_perms(s->system_journal, 0); | |
1199 | } else if (r < 0) { | |
1200 | ||
adf7d506 LP |
1201 | if (r != -ENOENT && r != -EROFS) |
1202 | log_warning("Failed to open system journal: %s", strerror(-r)); | |
1203 | ||
1204 | r = 0; | |
cf244689 LP |
1205 | } |
1206 | } | |
1207 | ||
1208 | if (!s->runtime_journal) { | |
1209 | ||
1210 | fn = join("/run/log/journal/", ids, "/system.journal", NULL); | |
1211 | if (!fn) | |
1212 | return -ENOMEM; | |
1213 | ||
1214 | if (s->system_journal) { | |
1215 | ||
1216 | /* Try to open the runtime journal, but only | |
1217 | * if it already exists, so that we can flush | |
1218 | * it into the system journal */ | |
1219 | ||
1220 | r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal); | |
1221 | free(fn); | |
1222 | ||
1223 | if (r < 0) { | |
adf7d506 LP |
1224 | if (r != -ENOENT) |
1225 | log_warning("Failed to open runtime journal: %s", strerror(-r)); | |
cf244689 | 1226 | |
adf7d506 | 1227 | r = 0; |
cf244689 LP |
1228 | } |
1229 | ||
1230 | } else { | |
1231 | ||
1232 | /* OK, we really need the runtime journal, so create | |
1233 | * it if necessary. */ | |
1234 | ||
1235 | (void) mkdir_parents(fn, 0755); | |
1236 | r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal); | |
1237 | free(fn); | |
1238 | ||
1239 | if (r < 0) { | |
1240 | log_error("Failed to open runtime journal: %s", strerror(-r)); | |
1241 | return r; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (s->runtime_journal) { | |
babfc091 LP |
1246 | journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd); |
1247 | ||
1248 | s->runtime_journal->metrics = s->runtime_metrics; | |
cf244689 LP |
1249 | s->runtime_journal->compress = s->compress; |
1250 | ||
1251 | fix_perms(s->runtime_journal, 0); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | return r; | |
1256 | } | |
1257 | ||
1258 | static int server_flush_to_var(Server *s) { | |
1259 | char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"; | |
1260 | Object *o = NULL; | |
1261 | int r; | |
1262 | sd_id128_t machine; | |
1263 | sd_journal *j; | |
54a7b863 | 1264 | usec_t ts; |
cf244689 LP |
1265 | |
1266 | assert(s); | |
1267 | ||
54a7b863 LP |
1268 | if (!s->runtime_journal) |
1269 | return 0; | |
1270 | ||
1271 | ts = now(CLOCK_MONOTONIC); | |
1272 | if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts) | |
1273 | return 0; | |
1274 | ||
1275 | s->var_available_timestamp = ts; | |
1276 | ||
cf244689 LP |
1277 | system_journal_open(s); |
1278 | ||
54a7b863 | 1279 | if (!s->system_journal) |
cf244689 LP |
1280 | return 0; |
1281 | ||
1282 | r = sd_id128_get_machine(&machine); | |
1283 | if (r < 0) { | |
1284 | log_error("Failed to get machine id: %s", strerror(-r)); | |
1285 | return r; | |
1286 | } | |
1287 | ||
1288 | r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY); | |
1289 | if (r < 0) { | |
1290 | log_error("Failed to read runtime journal: %s", strerror(-r)); | |
1291 | return r; | |
1292 | } | |
1293 | ||
1294 | SD_JOURNAL_FOREACH(j) { | |
1295 | JournalFile *f; | |
1296 | ||
1297 | f = j->current_file; | |
1298 | assert(f && f->current_offset > 0); | |
1299 | ||
1300 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); | |
1301 | if (r < 0) { | |
1302 | log_error("Can't read entry: %s", strerror(-r)); | |
1303 | goto finish; | |
1304 | } | |
1305 | ||
1306 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
1307 | if (r == -E2BIG) { | |
1308 | log_info("Allocation limit reached."); | |
1309 | ||
1310 | journal_file_post_change(s->system_journal); | |
1311 | server_vacuum(s); | |
1312 | ||
1313 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
1314 | } | |
1315 | ||
1316 | if (r < 0) { | |
1317 | log_error("Can't write entry: %s", strerror(-r)); | |
1318 | goto finish; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | finish: | |
1323 | journal_file_post_change(s->system_journal); | |
1324 | ||
1325 | journal_file_close(s->runtime_journal); | |
1326 | s->runtime_journal = NULL; | |
1327 | ||
1328 | if (r >= 0) { | |
1329 | sd_id128_to_string(machine, path + 17); | |
1330 | rm_rf(path, false, true, false); | |
1331 | } | |
1332 | ||
1333 | return r; | |
1334 | } | |
1335 | ||
8b18eb67 LP |
1336 | static void forward_syslog(Server *s, const void *buffer, size_t length, struct ucred *ucred, struct timeval *tv) { |
1337 | struct msghdr msghdr; | |
1338 | struct iovec iovec; | |
1339 | struct cmsghdr *cmsg; | |
1340 | union { | |
1341 | struct cmsghdr cmsghdr; | |
1342 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + | |
1343 | CMSG_SPACE(sizeof(struct timeval))]; | |
1344 | } control; | |
1345 | union sockaddr_union sa; | |
1346 | ||
1347 | assert(s); | |
1348 | ||
1349 | zero(msghdr); | |
1350 | ||
1351 | zero(iovec); | |
1352 | iovec.iov_base = (void*) buffer; | |
1353 | iovec.iov_len = length; | |
1354 | msghdr.msg_iov = &iovec; | |
1355 | msghdr.msg_iovlen = 1; | |
1356 | ||
1357 | zero(sa); | |
1358 | sa.un.sun_family = AF_UNIX; | |
1359 | strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path)); | |
1360 | msghdr.msg_name = &sa; | |
1361 | msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path); | |
1362 | ||
1363 | zero(control); | |
1364 | msghdr.msg_control = &control; | |
1365 | msghdr.msg_controllen = sizeof(control); | |
1366 | ||
1367 | cmsg = CMSG_FIRSTHDR(&msghdr); | |
1368 | cmsg->cmsg_level = SOL_SOCKET; | |
1369 | cmsg->cmsg_type = SCM_CREDENTIALS; | |
1370 | cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred)); | |
1371 | memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred)); | |
1372 | msghdr.msg_controllen = cmsg->cmsg_len; | |
1373 | ||
1374 | /* Forward the syslog message we received via /dev/log to | |
1375 | * /run/systemd/syslog. Unfortunately we currently can't set | |
1376 | * the SO_TIMESTAMP auxiliary data, and hence we don't. */ | |
1377 | ||
1378 | if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0) | |
1379 | return; | |
1380 | ||
1381 | if (errno == ESRCH) { | |
1382 | struct ucred u; | |
1383 | ||
1384 | /* Hmm, presumably the sender process vanished | |
1385 | * by now, so let's fix it as good as we | |
1386 | * can, and retry */ | |
1387 | ||
1388 | u = *ucred; | |
1389 | u.pid = getpid(); | |
1390 | memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred)); | |
1391 | ||
1392 | if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0) | |
1393 | return; | |
1394 | } | |
1395 | ||
1396 | log_debug("Failed to forward syslog message: %m"); | |
1397 | } | |
1398 | ||
fe652127 LP |
1399 | static int process_event(Server *s, struct epoll_event *ev) { |
1400 | assert(s); | |
1401 | ||
87d2c1ff LP |
1402 | if (ev->data.fd == s->signal_fd) { |
1403 | struct signalfd_siginfo sfsi; | |
1404 | ssize_t n; | |
1405 | ||
fe652127 LP |
1406 | if (ev->events != EPOLLIN) { |
1407 | log_info("Got invalid event from epoll."); | |
1408 | return -EIO; | |
1409 | } | |
1410 | ||
87d2c1ff LP |
1411 | n = read(s->signal_fd, &sfsi, sizeof(sfsi)); |
1412 | if (n != sizeof(sfsi)) { | |
1413 | ||
1414 | if (n >= 0) | |
1415 | return -EIO; | |
1416 | ||
1417 | if (errno == EINTR || errno == EAGAIN) | |
1418 | return 0; | |
1419 | ||
1420 | return -errno; | |
1421 | } | |
1422 | ||
cf244689 LP |
1423 | if (sfsi.ssi_signo == SIGUSR1) { |
1424 | server_flush_to_var(s); | |
1425 | return 0; | |
1426 | } | |
1427 | ||
87d2c1ff LP |
1428 | log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo)); |
1429 | return 0; | |
1430 | ||
fe652127 LP |
1431 | } else if (ev->data.fd == s->native_fd || |
1432 | ev->data.fd == s->syslog_fd) { | |
1433 | ||
1434 | if (ev->events != EPOLLIN) { | |
1435 | log_info("Got invalid event from epoll."); | |
1436 | return -EIO; | |
1437 | } | |
cec736d2 | 1438 | |
87d2c1ff | 1439 | for (;;) { |
87d2c1ff LP |
1440 | struct msghdr msghdr; |
1441 | struct iovec iovec; | |
1442 | struct ucred *ucred = NULL; | |
1443 | struct timeval *tv = NULL; | |
1444 | struct cmsghdr *cmsg; | |
1445 | union { | |
1446 | struct cmsghdr cmsghdr; | |
1447 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + | |
1448 | CMSG_SPACE(sizeof(struct timeval))]; | |
1449 | } control; | |
1450 | ssize_t n; | |
7f3e6257 LP |
1451 | int v; |
1452 | ||
1453 | if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) { | |
1454 | log_error("SIOCINQ failed: %m"); | |
1455 | return -errno; | |
1456 | } | |
1457 | ||
1458 | if (v <= 0) | |
1459 | return 1; | |
1460 | ||
1461 | if (s->buffer_size < (size_t) v) { | |
1462 | void *b; | |
1463 | size_t l; | |
1464 | ||
1465 | l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2); | |
1466 | b = realloc(s->buffer, l+1); | |
1467 | ||
1468 | if (!b) { | |
1469 | log_error("Couldn't increase buffer."); | |
1470 | return -ENOMEM; | |
1471 | } | |
1472 | ||
1473 | s->buffer_size = l; | |
1474 | s->buffer = b; | |
1475 | } | |
87d2c1ff LP |
1476 | |
1477 | zero(iovec); | |
7f3e6257 LP |
1478 | iovec.iov_base = s->buffer; |
1479 | iovec.iov_len = s->buffer_size; | |
87d2c1ff LP |
1480 | |
1481 | zero(control); | |
1482 | zero(msghdr); | |
1483 | msghdr.msg_iov = &iovec; | |
1484 | msghdr.msg_iovlen = 1; | |
1485 | msghdr.msg_control = &control; | |
1486 | msghdr.msg_controllen = sizeof(control); | |
1487 | ||
1488 | n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT); | |
1489 | if (n < 0) { | |
1490 | ||
1491 | if (errno == EINTR || errno == EAGAIN) | |
1492 | return 1; | |
1493 | ||
1494 | log_error("recvmsg() failed: %m"); | |
1495 | return -errno; | |
1496 | } | |
1497 | ||
1498 | for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) { | |
1499 | ||
1500 | if (cmsg->cmsg_level == SOL_SOCKET && | |
1501 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
1502 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
1503 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
1504 | else if (cmsg->cmsg_level == SOL_SOCKET && | |
1505 | cmsg->cmsg_type == SO_TIMESTAMP && | |
1506 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) | |
1507 | tv = (struct timeval*) CMSG_DATA(cmsg); | |
1508 | } | |
1509 | ||
7f3e6257 LP |
1510 | if (ev->data.fd == s->syslog_fd) { |
1511 | char *e; | |
1512 | ||
1513 | e = memchr(s->buffer, '\n', n); | |
1514 | if (e) | |
1515 | *e = 0; | |
1516 | else | |
1517 | s->buffer[n] = 0; | |
87d2c1ff | 1518 | |
8b18eb67 | 1519 | forward_syslog(s, s->buffer, n, ucred, tv); |
7f3e6257 LP |
1520 | process_syslog_message(s, strstrip(s->buffer), ucred, tv); |
1521 | } else | |
1522 | process_native_message(s, s->buffer, n, ucred, tv); | |
87d2c1ff | 1523 | } |
cec736d2 LP |
1524 | |
1525 | return 1; | |
fe652127 LP |
1526 | |
1527 | } else if (ev->data.fd == s->stdout_fd) { | |
1528 | ||
1529 | if (ev->events != EPOLLIN) { | |
1530 | log_info("Got invalid event from epoll."); | |
1531 | return -EIO; | |
1532 | } | |
1533 | ||
1534 | stdout_stream_new(s); | |
1535 | return 1; | |
1536 | ||
1537 | } else { | |
1538 | StdoutStream *stream; | |
1539 | ||
1540 | if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { | |
1541 | log_info("Got invalid event from epoll."); | |
1542 | return -EIO; | |
1543 | } | |
1544 | ||
1545 | /* If it is none of the well-known fds, it must be an | |
1546 | * stdout stream fd. Note that this is a bit ugly here | |
1547 | * (since we rely that none of the well-known fds | |
1548 | * could be interpreted as pointer), but nonetheless | |
1549 | * safe, since the well-known fds would never get an | |
1550 | * fd > 4096, i.e. beyond the first memory page */ | |
1551 | ||
1552 | stream = ev->data.ptr; | |
1553 | ||
1554 | if (stdout_stream_process(stream) <= 0) | |
1555 | stdout_stream_free(stream); | |
1556 | ||
1557 | return 1; | |
87d2c1ff LP |
1558 | } |
1559 | ||
cec736d2 LP |
1560 | log_error("Unknown event."); |
1561 | return 0; | |
87d2c1ff LP |
1562 | } |
1563 | ||
7f3e6257 LP |
1564 | static int open_syslog_socket(Server *s) { |
1565 | union sockaddr_union sa; | |
1566 | int one, r; | |
fe652127 | 1567 | struct epoll_event ev; |
8b18eb67 | 1568 | struct timeval tv; |
87d2c1ff LP |
1569 | |
1570 | assert(s); | |
1571 | ||
7f3e6257 | 1572 | if (s->syslog_fd < 0) { |
87d2c1ff | 1573 | |
7f3e6257 LP |
1574 | s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0); |
1575 | if (s->syslog_fd < 0) { | |
1576 | log_error("socket() failed: %m"); | |
1577 | return -errno; | |
1578 | } | |
1579 | ||
1580 | zero(sa); | |
1581 | sa.un.sun_family = AF_UNIX; | |
8b18eb67 | 1582 | strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path)); |
7f3e6257 LP |
1583 | |
1584 | unlink(sa.un.sun_path); | |
1585 | ||
1586 | r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); | |
1587 | if (r < 0) { | |
1588 | log_error("bind() failed: %m"); | |
1589 | return -errno; | |
1590 | } | |
1591 | ||
1592 | chmod(sa.un.sun_path, 0666); | |
87d2c1ff LP |
1593 | } |
1594 | ||
7f3e6257 LP |
1595 | one = 1; |
1596 | r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); | |
1597 | if (r < 0) { | |
1598 | log_error("SO_PASSCRED failed: %m"); | |
1599 | return -errno; | |
87d2c1ff LP |
1600 | } |
1601 | ||
7f3e6257 LP |
1602 | one = 1; |
1603 | r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one)); | |
1604 | if (r < 0) { | |
1605 | log_error("SO_TIMESTAMP failed: %m"); | |
1606 | return -errno; | |
87d2c1ff LP |
1607 | } |
1608 | ||
8b18eb67 LP |
1609 | /* Since we use the same socket for forwarding this to some |
1610 | * other syslog implementation, make sure we don't hang | |
1611 | * forever */ | |
1612 | timeval_store(&tv, SYSLOG_TIMEOUT_USEC); | |
1613 | if (setsockopt(s->syslog_fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) { | |
1614 | log_error("SO_SNDTIMEO failed: %m"); | |
1615 | return -errno; | |
1616 | } | |
1617 | ||
fe652127 LP |
1618 | zero(ev); |
1619 | ev.events = EPOLLIN; | |
1620 | ev.data.fd = s->syslog_fd; | |
1621 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) { | |
1622 | log_error("Failed to add syslog server fd to epoll object: %m"); | |
1623 | return -errno; | |
1624 | } | |
1625 | ||
7f3e6257 LP |
1626 | return 0; |
1627 | } | |
87d2c1ff | 1628 | |
7f3e6257 LP |
1629 | static int open_native_socket(Server*s) { |
1630 | union sockaddr_union sa; | |
1631 | int one, r; | |
fe652127 | 1632 | struct epoll_event ev; |
7f3e6257 LP |
1633 | |
1634 | assert(s); | |
1635 | ||
1636 | if (s->native_fd < 0) { | |
1637 | ||
1638 | s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0); | |
1639 | if (s->native_fd < 0) { | |
87d2c1ff LP |
1640 | log_error("socket() failed: %m"); |
1641 | return -errno; | |
1642 | } | |
1643 | ||
1644 | zero(sa); | |
1645 | sa.un.sun_family = AF_UNIX; | |
7f3e6257 | 1646 | strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path)); |
87d2c1ff LP |
1647 | |
1648 | unlink(sa.un.sun_path); | |
1649 | ||
7f3e6257 | 1650 | r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); |
87d2c1ff LP |
1651 | if (r < 0) { |
1652 | log_error("bind() failed: %m"); | |
1653 | return -errno; | |
1654 | } | |
1655 | ||
1656 | chmod(sa.un.sun_path, 0666); | |
1657 | } | |
1658 | ||
1659 | one = 1; | |
7f3e6257 | 1660 | r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)); |
87d2c1ff LP |
1661 | if (r < 0) { |
1662 | log_error("SO_PASSCRED failed: %m"); | |
1663 | return -errno; | |
1664 | } | |
1665 | ||
1666 | one = 1; | |
7f3e6257 | 1667 | r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one)); |
87d2c1ff LP |
1668 | if (r < 0) { |
1669 | log_error("SO_TIMESTAMP failed: %m"); | |
1670 | return -errno; | |
1671 | } | |
1672 | ||
fe652127 LP |
1673 | zero(ev); |
1674 | ev.events = EPOLLIN; | |
1675 | ev.data.fd = s->native_fd; | |
1676 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) { | |
1677 | log_error("Failed to add native server fd to epoll object: %m"); | |
1678 | return -errno; | |
1679 | } | |
1680 | ||
7f3e6257 LP |
1681 | return 0; |
1682 | } | |
1683 | ||
fe652127 LP |
1684 | static int open_stdout_socket(Server *s) { |
1685 | union sockaddr_union sa; | |
1686 | int r; | |
7f3e6257 | 1687 | struct epoll_event ev; |
fe652127 LP |
1688 | |
1689 | assert(s); | |
1690 | ||
1691 | if (s->stdout_fd < 0) { | |
1692 | ||
1693 | s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0); | |
1694 | if (s->stdout_fd < 0) { | |
1695 | log_error("socket() failed: %m"); | |
1696 | return -errno; | |
1697 | } | |
1698 | ||
1699 | zero(sa); | |
1700 | sa.un.sun_family = AF_UNIX; | |
1701 | strncpy(sa.un.sun_path, "/run/systemd/stdout", sizeof(sa.un.sun_path)); | |
1702 | ||
1703 | unlink(sa.un.sun_path); | |
1704 | ||
1705 | r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); | |
1706 | if (r < 0) { | |
1707 | log_error("bind() failed: %m"); | |
1708 | return -errno; | |
1709 | } | |
1710 | ||
1711 | chmod(sa.un.sun_path, 0666); | |
1712 | ||
1713 | if (listen(s->stdout_fd, SOMAXCONN) < 0) { | |
1714 | log_error("liste() failed: %m"); | |
1715 | return -errno; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | zero(ev); | |
1720 | ev.events = EPOLLIN; | |
1721 | ev.data.fd = s->stdout_fd; | |
1722 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) { | |
1723 | log_error("Failed to add stdout server fd to epoll object: %m"); | |
1724 | return -errno; | |
1725 | } | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | static int open_signalfd(Server *s) { | |
7f3e6257 | 1731 | sigset_t mask; |
fe652127 LP |
1732 | struct epoll_event ev; |
1733 | ||
1734 | assert(s); | |
1735 | ||
1736 | assert_se(sigemptyset(&mask) == 0); | |
cf244689 | 1737 | sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, -1); |
fe652127 LP |
1738 | assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); |
1739 | ||
1740 | s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
1741 | if (s->signal_fd < 0) { | |
1742 | log_error("signalfd(): %m"); | |
1743 | return -errno; | |
1744 | } | |
1745 | ||
1746 | zero(ev); | |
1747 | ev.events = EPOLLIN; | |
1748 | ev.data.fd = s->signal_fd; | |
1749 | ||
1750 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) { | |
1751 | log_error("epoll_ctl(): %m"); | |
1752 | return -errno; | |
1753 | } | |
1754 | ||
1755 | return 0; | |
1756 | } | |
1757 | ||
1758 | static int server_init(Server *s) { | |
1759 | int n, r, fd; | |
7f3e6257 LP |
1760 | |
1761 | assert(s); | |
1762 | ||
1763 | zero(*s); | |
fe652127 | 1764 | s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1; |
807e17f0 | 1765 | s->compress = true; |
7f3e6257 | 1766 | |
babfc091 LP |
1767 | memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics)); |
1768 | memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics)); | |
1769 | ||
fe652127 LP |
1770 | s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func); |
1771 | if (!s->user_journals) { | |
1772 | log_error("Out of memory."); | |
1773 | return -ENOMEM; | |
1774 | } | |
1775 | ||
7f3e6257 LP |
1776 | s->epoll_fd = epoll_create1(EPOLL_CLOEXEC); |
1777 | if (s->epoll_fd < 0) { | |
1778 | log_error("Failed to create epoll object: %m"); | |
1779 | return -errno; | |
1780 | } | |
1781 | ||
1782 | n = sd_listen_fds(true); | |
1783 | if (n < 0) { | |
1784 | log_error("Failed to read listening file descriptors from environment: %s", strerror(-n)); | |
1785 | return n; | |
1786 | } | |
1787 | ||
1788 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { | |
1789 | ||
fe652127 | 1790 | if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/native", 0) > 0) { |
7f3e6257 | 1791 | |
fe652127 LP |
1792 | if (s->native_fd >= 0) { |
1793 | log_error("Too many native sockets passed."); | |
7f3e6257 LP |
1794 | return -EINVAL; |
1795 | } | |
1796 | ||
fe652127 | 1797 | s->native_fd = fd; |
7f3e6257 | 1798 | |
fe652127 | 1799 | } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/stdout", 0) > 0) { |
7f3e6257 | 1800 | |
fe652127 LP |
1801 | if (s->stdout_fd >= 0) { |
1802 | log_error("Too many stdout sockets passed."); | |
7f3e6257 LP |
1803 | return -EINVAL; |
1804 | } | |
1805 | ||
fe652127 LP |
1806 | s->stdout_fd = fd; |
1807 | ||
1808 | } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) { | |
1809 | ||
1810 | if (s->syslog_fd >= 0) { | |
1811 | log_error("Too many /dev/log sockets passed."); | |
1812 | return -EINVAL; | |
1813 | } | |
1814 | ||
1815 | s->syslog_fd = fd; | |
1816 | ||
7f3e6257 LP |
1817 | } else { |
1818 | log_error("Unknown socket passed."); | |
1819 | return -EINVAL; | |
1820 | } | |
1821 | } | |
1822 | ||
1823 | r = open_syslog_socket(s); | |
1824 | if (r < 0) | |
1825 | return r; | |
1826 | ||
7f3e6257 LP |
1827 | r = open_native_socket(s); |
1828 | if (r < 0) | |
1829 | return r; | |
1830 | ||
fe652127 LP |
1831 | r = open_stdout_socket(s); |
1832 | if (r < 0) | |
1833 | return r; | |
87d2c1ff | 1834 | |
ed49ef3f LP |
1835 | r = system_journal_open(s); |
1836 | if (r < 0) | |
87d2c1ff | 1837 | return r; |
87d2c1ff | 1838 | |
fe652127 LP |
1839 | r = open_signalfd(s); |
1840 | if (r < 0) | |
1841 | return r; | |
87d2c1ff | 1842 | |
de97b26a | 1843 | s->rate_limit = journal_rate_limit_new(DEFAULT_RATE_LIMIT_INTERVAL, DEFAULT_RATE_LIMIT_BURST); |
6e409ce1 LP |
1844 | if (!s->rate_limit) |
1845 | return -ENOMEM; | |
1846 | ||
87d2c1ff LP |
1847 | return 0; |
1848 | } | |
1849 | ||
1850 | static void server_done(Server *s) { | |
1851 | JournalFile *f; | |
1852 | assert(s); | |
1853 | ||
fe652127 LP |
1854 | while (s->stdout_streams) |
1855 | stdout_stream_free(s->stdout_streams); | |
1856 | ||
87d2c1ff LP |
1857 | if (s->system_journal) |
1858 | journal_file_close(s->system_journal); | |
1859 | ||
f4b47811 LP |
1860 | if (s->runtime_journal) |
1861 | journal_file_close(s->runtime_journal); | |
1862 | ||
87d2c1ff LP |
1863 | while ((f = hashmap_steal_first(s->user_journals))) |
1864 | journal_file_close(f); | |
1865 | ||
1866 | hashmap_free(s->user_journals); | |
1867 | ||
1868 | if (s->epoll_fd >= 0) | |
1869 | close_nointr_nofail(s->epoll_fd); | |
1870 | ||
1871 | if (s->signal_fd >= 0) | |
1872 | close_nointr_nofail(s->signal_fd); | |
1873 | ||
1874 | if (s->syslog_fd >= 0) | |
1875 | close_nointr_nofail(s->syslog_fd); | |
7f3e6257 LP |
1876 | |
1877 | if (s->native_fd >= 0) | |
1878 | close_nointr_nofail(s->native_fd); | |
fe652127 LP |
1879 | |
1880 | if (s->stdout_fd >= 0) | |
1881 | close_nointr_nofail(s->stdout_fd); | |
6e409ce1 LP |
1882 | |
1883 | if (s->rate_limit) | |
1884 | journal_rate_limit_free(s->rate_limit); | |
783d2675 LP |
1885 | |
1886 | free(s->buffer); | |
87d2c1ff LP |
1887 | } |
1888 | ||
1889 | int main(int argc, char *argv[]) { | |
1890 | Server server; | |
1891 | int r; | |
1892 | ||
1893 | /* if (getppid() != 1) { */ | |
1894 | /* log_error("This program should be invoked by init only."); */ | |
1895 | /* return EXIT_FAILURE; */ | |
1896 | /* } */ | |
1897 | ||
1898 | if (argc > 1) { | |
1899 | log_error("This program does not take arguments."); | |
1900 | return EXIT_FAILURE; | |
1901 | } | |
1902 | ||
f4b47811 | 1903 | log_set_target(LOG_TARGET_CONSOLE); |
87d2c1ff LP |
1904 | log_parse_environment(); |
1905 | log_open(); | |
1906 | ||
1907 | umask(0022); | |
1908 | ||
1909 | r = server_init(&server); | |
1910 | if (r < 0) | |
1911 | goto finish; | |
1912 | ||
1913 | log_debug("systemd-journald running as pid %lu", (unsigned long) getpid()); | |
1914 | ||
1915 | sd_notify(false, | |
1916 | "READY=1\n" | |
fe652127 | 1917 | "STATUS=Processing requests..."); |
50f20cfd | 1918 | |
cf244689 LP |
1919 | server_vacuum(&server); |
1920 | server_flush_to_var(&server); | |
1921 | ||
87d2c1ff LP |
1922 | for (;;) { |
1923 | struct epoll_event event; | |
1924 | ||
1925 | r = epoll_wait(server.epoll_fd, &event, 1, -1); | |
1926 | if (r < 0) { | |
1927 | ||
1928 | if (errno == EINTR) | |
1929 | continue; | |
1930 | ||
1931 | log_error("epoll_wait() failed: %m"); | |
1932 | r = -errno; | |
1933 | goto finish; | |
1934 | } else if (r == 0) | |
1935 | break; | |
1936 | ||
1937 | r = process_event(&server, &event); | |
1938 | if (r < 0) | |
1939 | goto finish; | |
1940 | else if (r == 0) | |
1941 | break; | |
1942 | } | |
1943 | ||
fe652127 LP |
1944 | log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid()); |
1945 | ||
87d2c1ff LP |
1946 | finish: |
1947 | sd_notify(false, | |
1948 | "STATUS=Shutting down..."); | |
1949 | ||
1950 | server_done(&server); | |
1951 | ||
1952 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1953 | } |