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journal: move sockets into their own subdir
[thirdparty/systemd.git] / src / journal / journald.c
CommitLineData
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 34
81527be1
LP		 35#include <systemd/sd-journal.h>
36#include <systemd/sd-login.h>
37#include <systemd/sd-messages.h>
38#include <systemd/sd-daemon.h>
39
87d2c1ff 40#include "hashmap.h"
cec736d2 41#include "journal-file.h"
87d2c1ff 42#include "socket-util.h"
f4b47811 43#include "acl-util.h"
69e5d42d 44#include "cgroup-util.h"
fe652127 45#include "list.h"
6e409ce1 46#include "journal-rate-limit.h"
cf244689 47#include "journal-internal.h"
e6960940
LP		 48#include "conf-parser.h"
49#include "journald.h"
87d2c1ff 50
cab8ac60 51#define USER_JOURNALS_MAX 1024
fe652127
LP		 52#define STDOUT_STREAMS_MAX 4096
53
de97b26a
LP		 54#define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
55#define DEFAULT_RATE_LIMIT_BURST 200
56
9cfb57c9
LP		 57#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
58
54a7b863
LP		 59#define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
60
8b18eb67
LP		 61#define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
62
224f2ee2
LP		 63#define N_IOVEC_META_FIELDS 16
64
fe652127
LP		 65typedef enum StdoutStreamState {
66 STDOUT_STREAM_TAG,
67 STDOUT_STREAM_PRIORITY,
68 STDOUT_STREAM_PRIORITY_PREFIX,
224f2ee2
LP		 69 STDOUT_STREAM_FORWARD_TO_SYSLOG,
70 STDOUT_STREAM_FORWARD_TO_KMSG,
71 STDOUT_STREAM_FORWARD_TO_CONSOLE,
fe652127
LP		 72 STDOUT_STREAM_RUNNING
73} StdoutStreamState;
74
75struct StdoutStream {
76 Server *server;
77 StdoutStreamState state;
78
79 int fd;
80
81 struct ucred ucred;
82
83 char *tag;
84 int priority;
85 bool priority_prefix:1;
224f2ee2
LP		 86 bool forward_to_syslog:1;
87 bool forward_to_kmsg:1;
88 bool forward_to_console:1;
fe652127
LP		 89
90 char buffer[LINE_MAX+1];
91 size_t length;
92
93 LIST_FIELDS(StdoutStream, stdout_stream);
94};
95
cf244689
LP		 96static int server_flush_to_var(Server *s);
97
6e409ce1 98static uint64_t available_space(Server *s) {
babfc091 99 char ids[33], *p;
6e409ce1 100 const char *f;
babfc091 101 sd_id128_t machine;
6e409ce1
LP		 102 struct statvfs ss;
103 uint64_t sum = 0, avail = 0, ss_avail = 0;
104 int r;
105 DIR *d;
babfc091
LP		 106 usec_t ts;
107 JournalMetrics *m;
108
109 ts = now(CLOCK_MONOTONIC);
9cfb57c9
LP		 110
111 if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts)
112 return s->cached_available_space;
6e409ce1
LP		 113
114 r = sd_id128_get_machine(&machine);
115 if (r < 0)
116 return 0;
117
babfc091 118 if (s->system_journal) {
6e409ce1 119 f = "/var/log/journal/";
babfc091
LP		 120 m = &s->system_metrics;
121 } else {
6e409ce1 122 f = "/run/log/journal/";
babfc091
LP		 123 m = &s->runtime_metrics;
124 }
125
126 assert(m);
6e409ce1
LP		 127
128 p = strappend(f, sd_id128_to_string(machine, ids));
129 if (!p)
130 return 0;
131
132 d = opendir(p);
133 free(p);
134
135 if (!d)
136 return 0;
137
138 if (fstatvfs(dirfd(d), &ss) < 0)
139 goto finish;
140
141 for (;;) {
142 struct stat st;
143 struct dirent buf, *de;
144 int k;
145
146 k = readdir_r(d, &buf, &de);
147 if (k != 0) {
148 r = -k;
149 goto finish;
150 }
151
152 if (!de)
153 break;
154
155 if (!dirent_is_file_with_suffix(de, ".journal"))
156 continue;
157
158 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
159 continue;
160
161 sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
162 }
163
babfc091 164 avail = sum >= m->max_use ? 0 : m->max_use - sum;
6e409ce1
LP		 165
166 ss_avail = ss.f_bsize * ss.f_bavail;
167
babfc091 168 ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free;
6e409ce1
LP		 169
170 if (ss_avail < avail)
171 avail = ss_avail;
172
9cfb57c9
LP		 173 s->cached_available_space = avail;
174 s->cached_available_space_timestamp = ts;
175
6e409ce1
LP		 176finish:
177 closedir(d);
178
179 return avail;
180}
181
f4b47811
LP		 182static void fix_perms(JournalFile *f, uid_t uid) {
183 acl_t acl;
184 acl_entry_t entry;
185 acl_permset_t permset;
186 int r;
187
188 assert(f);
189
190 r = fchmod_and_fchown(f->fd, 0640, 0, 0);
191 if (r < 0)
192 log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
193
194 if (uid <= 0)
195 return;
196
197 acl = acl_get_fd(f->fd);
198 if (!acl) {
199 log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
200 return;
201 }
202
203 r = acl_find_uid(acl, uid, &entry);
204 if (r <= 0) {
205
206 if (acl_create_entry(&acl, &entry) < 0 ||
207 acl_set_tag_type(entry, ACL_USER) < 0 ||
208 acl_set_qualifier(entry, &uid) < 0) {
209 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
210 goto finish;
211 }
212 }
213
214 if (acl_get_permset(entry, &permset) < 0 ||
215 acl_add_perm(permset, ACL_READ) < 0 ||
216 acl_calc_mask(&acl) < 0) {
217 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
218 goto finish;
219 }
220
221 if (acl_set_fd(f->fd, acl) < 0)
222 log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
223
224finish:
225 acl_free(acl);
226}
227
228static JournalFile* find_journal(Server *s, uid_t uid) {
229 char *p;
230 int r;
231 JournalFile *f;
3fbf9cbb
LP		 232 char ids[33];
233 sd_id128_t machine;
f4b47811
LP		 234
235 assert(s);
236
cf244689
LP		 237 /* We split up user logs only on /var, not on /run. If the
238 * runtime file is open, we write to it exclusively, in order
239 * to guarantee proper order as soon as we flush /run to
240 * /var and close the runtime file. */
241
242 if (s->runtime_journal)
f4b47811
LP		 243 return s->runtime_journal;
244
245 if (uid <= 0)
246 return s->system_journal;
247
3fbf9cbb
LP		 248 r = sd_id128_get_machine(&machine);
249 if (r < 0)
250 return s->system_journal;
251
f4b47811
LP		 252 f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
253 if (f)
254 return f;
255
3fbf9cbb 256 if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0)
f4b47811
LP		 257 return s->system_journal;
258
cab8ac60
LP		 259 while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
260 /* Too many open? Then let's close one */
261 f = hashmap_steal_first(s->user_journals);
262 assert(f);
263 journal_file_close(f);
264 }
265
c2373f84 266 r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
f4b47811
LP		 267 free(p);
268
269 if (r < 0)
270 return s->system_journal;
271
272 fix_perms(f, uid);
babfc091 273 f->metrics = s->system_metrics;
807e17f0 274 f->compress = s->compress;
f4b47811
LP		 275
276 r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
277 if (r < 0) {
278 journal_file_close(f);
279 return s->system_journal;
280 }
281
282 return f;
283}
284
b1a0ab71
LP		 285static void server_rotate(Server *s) {
286 JournalFile *f;
bc85bfee 287 void *k;
b1a0ab71 288 Iterator i;
bc85bfee 289 int r;
bc85bfee
LP		 290
291 log_info("Rotating...");
292
293 if (s->runtime_journal) {
294 r = journal_file_rotate(&s->runtime_journal);
295 if (r < 0)
296 log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
297 }
298
299 if (s->system_journal) {
300 r = journal_file_rotate(&s->system_journal);
301 if (r < 0)
302 log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
303 }
304
305 HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
306 r = journal_file_rotate(&f);
307 if (r < 0)
308 log_error("Failed to rotate %s: %s", f->path, strerror(-r));
309 else
310 hashmap_replace(s->user_journals, k, f);
311 }
b1a0ab71
LP		 312}
313
314static void server_vacuum(Server *s) {
315 char *p;
316 char ids[33];
317 sd_id128_t machine;
318 int r;
bc85bfee
LP		 319
320 log_info("Vacuuming...");
321
322 r = sd_id128_get_machine(&machine);
323 if (r < 0) {
324 log_error("Failed to get machine ID: %s", strerror(-r));
325 return;
326 }
327
babfc091 328 sd_id128_to_string(machine, ids);
bc85bfee 329
babfc091
LP		 330 if (s->system_journal) {
331 if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
332 log_error("Out of memory.");
333 return;
334 }
bc85bfee 335
babfc091
LP		 336 r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free);
337 if (r < 0 && r != -ENOENT)
338 log_error("Failed to vacuum %s: %s", p, strerror(-r));
339 free(p);
bc85bfee
LP		 340 }
341
babfc091
LP		 342
343 if (s->runtime_journal) {
344 if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
345 log_error("Out of memory.");
346 return;
347 }
348
349 r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free);
350 if (r < 0 && r != -ENOENT)
351 log_error("Failed to vacuum %s: %s", p, strerror(-r));
352 free(p);
353 }
9cfb57c9
LP		 354
355 s->cached_available_space_timestamp = 0;
bc85bfee
LP		 356}
357
6e409ce1
LP		 358static char *shortened_cgroup_path(pid_t pid) {
359 int r;
360 char *process_path, *init_path, *path;
361
362 assert(pid > 0);
363
364 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path);
365 if (r < 0)
366 return NULL;
367
368 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path);
369 if (r < 0) {
370 free(process_path);
371 return NULL;
372 }
373
bad75c27
LP		 374 if (endswith(init_path, "/system"))
375 init_path[strlen(init_path) - 7] = 0;
376 else if (streq(init_path, "/"))
6e409ce1
LP		 377 init_path[0] = 0;
378
783d2675
LP		 379 if (startswith(process_path, init_path)) {
380 char *p;
381
382 p = strdup(process_path + strlen(init_path));
383 if (!p) {
384 free(process_path);
385 free(init_path);
386 return NULL;
387 }
388 path = p;
389 } else {
6e409ce1 390 path = process_path;
783d2675
LP		 391 process_path = NULL;
392 }
6e409ce1 393
783d2675 394 free(process_path);
6e409ce1
LP		 395 free(init_path);
396
397 return path;
398}
399
400static void dispatch_message_real(Server *s,
401 struct iovec *iovec, unsigned n, unsigned m,
402 struct ucred *ucred,
403 struct timeval *tv) {
404
7f3e6257 405 char *pid = NULL, *uid = NULL, *gid = NULL,
87d2c1ff
LP		 406 *source_time = NULL, *boot_id = NULL, *machine_id = NULL,
407 *comm = NULL, *cmdline = NULL, *hostname = NULL,
408 *audit_session = NULL, *audit_loginuid = NULL,
85d83bf4 409 *exe = NULL, *cgroup = NULL, *session = NULL,
94fb446e 410 *owner_uid = NULL, *unit = NULL;
7f3e6257 411
87d2c1ff
LP		 412 char idbuf[33];
413 sd_id128_t id;
414 int r;
415 char *t;
de190aef 416 uid_t loginuid = 0, realuid = 0;
f4b47811 417 JournalFile *f;
bc85bfee 418 bool vacuumed = false;
87d2c1ff 419
7f3e6257 420 assert(s);
6e409ce1
LP		 421 assert(iovec);
422 assert(n > 0);
224f2ee2 423 assert(n + N_IOVEC_META_FIELDS <= m);
87d2c1ff
LP		 424
425 if (ucred) {
85d83bf4
LP		 426 uint32_t audit;
427 uid_t owner;
87d2c1ff 428
de190aef
LP		 429 realuid = ucred->uid;
430
431 if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
87d2c1ff
LP		 432 IOVEC_SET_STRING(iovec[n++], pid);
433
de190aef 434 if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
87d2c1ff
LP		 435 IOVEC_SET_STRING(iovec[n++], uid);
436
de190aef 437 if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
87d2c1ff
LP		 438 IOVEC_SET_STRING(iovec[n++], gid);
439
440 r = get_process_comm(ucred->pid, &t);
441 if (r >= 0) {
de190aef 442 comm = strappend("_COMM=", t);
85d83bf4
LP		 443 free(t);
444
87d2c1ff
LP		 445 if (comm)
446 IOVEC_SET_STRING(iovec[n++], comm);
87d2c1ff
LP		 447 }
448
449 r = get_process_exe(ucred->pid, &t);
450 if (r >= 0) {
de190aef 451 exe = strappend("_EXE=", t);
85d83bf4
LP		 452 free(t);
453
87d2c1ff
LP		 454 if (comm)
455 IOVEC_SET_STRING(iovec[n++], exe);
87d2c1ff
LP		 456 }
457
458 r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
459 if (r >= 0) {
de190aef 460 cmdline = strappend("_CMDLINE=", t);
85d83bf4
LP		 461 free(t);
462
87d2c1ff
LP		 463 if (cmdline)
464 IOVEC_SET_STRING(iovec[n++], cmdline);
87d2c1ff
LP		 465 }
466
85d83bf4 467 r = audit_session_from_pid(ucred->pid, &audit);
87d2c1ff 468 if (r >= 0)
85d83bf4 469 if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0)
87d2c1ff
LP		 470 IOVEC_SET_STRING(iovec[n++], audit_session);
471
472 r = audit_loginuid_from_pid(ucred->pid, &loginuid);
473 if (r >= 0)
de190aef 474 if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
87d2c1ff 475 IOVEC_SET_STRING(iovec[n++], audit_loginuid);
69e5d42d 476
85d83bf4
LP		 477 t = shortened_cgroup_path(ucred->pid);
478 if (t) {
479 cgroup = strappend("_SYSTEMD_CGROUP=", t);
480 free(t);
481
69e5d42d
LP		 482 if (cgroup)
483 IOVEC_SET_STRING(iovec[n++], cgroup);
85d83bf4
LP		 484 }
485
486 if (sd_pid_get_session(ucred->pid, &t) >= 0) {
487 session = strappend("_SYSTEMD_SESSION=", t);
488 free(t);
489
490 if (session)
491 IOVEC_SET_STRING(iovec[n++], session);
492 }
6e409ce1 493
94fb446e
LP		 494 if (sd_pid_get_unit(ucred->pid, &t) >= 0) {
495 unit = strappend("_SYSTEMD_UNIT=", t);
85d83bf4
LP		 496 free(t);
497
94fb446e
LP		 498 if (unit)
499 IOVEC_SET_STRING(iovec[n++], unit);
69e5d42d 500 }
85d83bf4
LP		 501
502 if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0)
503 if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0)
504 IOVEC_SET_STRING(iovec[n++], owner_uid);
87d2c1ff
LP		 505 }
506
507 if (tv) {
de190aef 508 if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
87d2c1ff
LP		 509 (unsigned long long) timeval_load(tv)) >= 0)
510 IOVEC_SET_STRING(iovec[n++], source_time);
511 }
512
ed49ef3f
LP		 513 /* Note that strictly speaking storing the boot id here is
514 * redundant since the entry includes this in-line
515 * anyway. However, we need this indexed, too. */
87d2c1ff
LP		 516 r = sd_id128_get_boot(&id);
517 if (r >= 0)
de190aef 518 if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
87d2c1ff
LP		 519 IOVEC_SET_STRING(iovec[n++], boot_id);
520
521 r = sd_id128_get_machine(&id);
522 if (r >= 0)
de190aef 523 if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
87d2c1ff
LP		 524 IOVEC_SET_STRING(iovec[n++], machine_id);
525
526 t = gethostname_malloc();
527 if (t) {
de190aef 528 hostname = strappend("_HOSTNAME=", t);
85d83bf4 529 free(t);
87d2c1ff
LP		 530 if (hostname)
531 IOVEC_SET_STRING(iovec[n++], hostname);
87d2c1ff
LP		 532 }
533
7f3e6257
LP		 534 assert(n <= m);
535
cf244689
LP		 536 server_flush_to_var(s);
537
bc85bfee 538retry:
de190aef 539 f = find_journal(s, realuid == 0 ? 0 : loginuid);
f4b47811
LP		 540 if (!f)
541 log_warning("Dropping message, as we can't find a place to store the data.");
542 else {
c2373f84 543 r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
87d2c1ff 544
bc85bfee
LP		 545 if (r == -E2BIG && !vacuumed) {
546 log_info("Allocation limit reached.");
547
b1a0ab71 548 server_rotate(s);
bc85bfee
LP		 549 server_vacuum(s);
550 vacuumed = true;
551
552 log_info("Retrying write.");
553 goto retry;
554 }
555
f4b47811
LP		 556 if (r < 0)
557 log_error("Failed to write entry, ignoring: %s", strerror(-r));
558 }
87d2c1ff 559
87d2c1ff
LP		 560 free(pid);
561 free(uid);
562 free(gid);
563 free(comm);
69e5d42d 564 free(exe);
87d2c1ff
LP		 565 free(cmdline);
566 free(source_time);
567 free(boot_id);
568 free(machine_id);
569 free(hostname);
570 free(audit_session);
571 free(audit_loginuid);
7f3e6257 572 free(cgroup);
85d83bf4
LP		 573 free(session);
574 free(owner_uid);
94fb446e 575 free(unit);
7f3e6257
LP		 576}
577
224f2ee2
LP		 578static void driver_message(Server *s, sd_id128_t message_id, const char *format, ...) {
579 char mid[11 + 32 + 1];
580 char buffer[16 + LINE_MAX + 1];
581 struct iovec iovec[N_IOVEC_META_FIELDS + 3];
582 int n = 0;
583 va_list ap;
584 struct ucred ucred;
585
586 assert(s);
587 assert(format);
588
589 IOVEC_SET_STRING(iovec[n++], "PRIORITY=5");
590
591 memcpy(buffer, "MESSAGE=", 8);
592 va_start(ap, format);
593 vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap);
594 va_end(ap);
595 char_array_0(buffer);
596 IOVEC_SET_STRING(iovec[n++], buffer);
597
598 snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id));
599 char_array_0(mid);
600 IOVEC_SET_STRING(iovec[n++], mid);
601
602 zero(ucred);
603 ucred.pid = getpid();
604 ucred.uid = getuid();
605 ucred.gid = getgid();
606
607 dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL);
608}
609
6e409ce1
LP		 610static void dispatch_message(Server *s,
611 struct iovec *iovec, unsigned n, unsigned m,
612 struct ucred *ucred,
613 struct timeval *tv,
614 int priority) {
615 int rl;
783d2675 616 char *path = NULL, *c;
6e409ce1
LP		 617
618 assert(s);
619 assert(iovec || n == 0);
620
621 if (n == 0)
622 return;
623
624 if (!ucred)
625 goto finish;
626
627 path = shortened_cgroup_path(ucred->pid);
628 if (!path)
629 goto finish;
630
631 /* example: /user/lennart/3/foobar
632 * /system/dbus.service/foobar
633 *
634 * So let's cut of everything past the third /, since that is
635 * wher user directories start */
636
637 c = strchr(path, '/');
638 if (c) {
639 c = strchr(c+1, '/');
640 if (c) {
641 c = strchr(c+1, '/');
642 if (c)
643 *c = 0;
644 }
645 }
646
224f2ee2 647 rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available_space(s));
6e409ce1
LP		 648
649 if (rl == 0) {
650 free(path);
651 return;
652 }
653
224f2ee2
LP		 654 /* Write a suppression message if we suppressed something */
655 if (rl > 1)
656 driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path);
657
658 free(path);
659
660finish:
661 dispatch_message_real(s, iovec, n, m, ucred, tv);
662}
663
664static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, struct ucred *ucred, struct timeval *tv) {
665 struct msghdr msghdr;
666 struct cmsghdr *cmsg;
667 union {
668 struct cmsghdr cmsghdr;
669 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
670 } control;
671 union sockaddr_union sa;
672
673 assert(s);
674 assert(iovec);
675 assert(n_iovec > 0);
676
677 zero(msghdr);
678 msghdr.msg_iov = (struct iovec*) iovec;
679 msghdr.msg_iovlen = n_iovec;
680
681 zero(sa);
682 sa.un.sun_family = AF_UNIX;
259d2e76 683 strncpy(sa.un.sun_path, "/run/systemd/journal/syslog", sizeof(sa.un.sun_path));
224f2ee2
LP		 684 msghdr.msg_name = &sa;
685 msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
686
687 if (ucred) {
688 zero(control);
689 msghdr.msg_control = &control;
690 msghdr.msg_controllen = sizeof(control);
691
692 cmsg = CMSG_FIRSTHDR(&msghdr);
693 cmsg->cmsg_level = SOL_SOCKET;
694 cmsg->cmsg_type = SCM_CREDENTIALS;
695 cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
696 memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
697 msghdr.msg_controllen = cmsg->cmsg_len;
698 }
699
700 /* Forward the syslog message we received via /dev/log to
701 * /run/systemd/syslog. Unfortunately we currently can't set
702 * the SO_TIMESTAMP auxiliary data, and hence we don't. */
6e409ce1 703
224f2ee2
LP		 704 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
705 return;
6e409ce1 706
224f2ee2
LP		 707 if (ucred && errno == ESRCH) {
708 struct ucred u;
6e409ce1 709
224f2ee2
LP		 710 /* Hmm, presumably the sender process vanished
711 * by now, so let's fix it as good as we
712 * can, and retry */
6e409ce1 713
224f2ee2
LP		 714 u = *ucred;
715 u.pid = getpid();
716 memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
717
718 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
719 return;
6e409ce1
LP		 720 }
721
224f2ee2
LP		 722 log_debug("Failed to forward syslog message: %m");
723}
724
725static void forward_syslog_raw(Server *s, const char *buffer, struct ucred *ucred, struct timeval *tv) {
726 struct iovec iovec;
727
728 assert(s);
729 assert(buffer);
730
731 IOVEC_SET_STRING(iovec, buffer);
732 forward_syslog_iovec(s, &iovec, 1, ucred, tv);
733}
734
735static void forward_syslog(Server *s, int priority, const char *tag, const char *message, struct ucred *ucred, struct timeval *tv) {
736 struct iovec iovec[5];
737 char header_priority[6], header_time[64], header_pid[16];
738 int n = 0;
739 time_t t;
740 struct tm *tm;
741 char *tag_buf = NULL;
742
743 assert(s);
744 assert(priority >= 0);
745 assert(priority <= 999);
746 assert(message);
747
748 /* First: priority field */
749 snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
750 char_array_0(header_priority);
751 IOVEC_SET_STRING(iovec[n++], header_priority);
752
753 /* Second: timestamp */
754 t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC));
755 tm = localtime(&t);
756 if (!tm)
757 return;
758 if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
759 return;
760 IOVEC_SET_STRING(iovec[n++], header_time);
761
762 /* Third: tag and PID */
763 if (ucred) {
764 if (!tag) {
765 get_process_comm(ucred->pid, &tag_buf);
766 tag = tag_buf;
767 }
768
769 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
770 char_array_0(header_pid);
771
772 if (tag)
773 IOVEC_SET_STRING(iovec[n++], tag);
774
775 IOVEC_SET_STRING(iovec[n++], header_pid);
776 } else if (tag) {
777 IOVEC_SET_STRING(iovec[n++], tag);
778 IOVEC_SET_STRING(iovec[n++], ": ");
779 }
780
781 /* Fourth: message */
782 IOVEC_SET_STRING(iovec[n++], message);
783
784 forward_syslog_iovec(s, iovec, n, ucred, tv);
785
786 free(tag_buf);
787}
788
789static int fixup_priority(int priority) {
790
791 if ((priority & LOG_FACMASK) == 0)
792 return (priority & LOG_PRIMASK) | LOG_USER;
793
794 return priority;
795}
796
797static void forward_kmsg(Server *s, int priority, const char *tag, const char *message, struct ucred *ucred) {
798 struct iovec iovec[5];
799 char header_priority[6], header_pid[16];
800 int n = 0;
801 char *tag_buf = NULL;
802 int fd;
803
804 assert(s);
805 assert(priority >= 0);
806 assert(priority <= 999);
807 assert(message);
808
809 /* Never allow messages with kernel facility to be written to
810 * kmsg, regardless where the data comes from. */
811 priority = fixup_priority(priority);
812
813 /* First: priority field */
814 snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
815 char_array_0(header_priority);
816 IOVEC_SET_STRING(iovec[n++], header_priority);
817
818 /* Second: tag and PID */
819 if (ucred) {
820 if (!tag) {
821 get_process_comm(ucred->pid, &tag_buf);
822 tag = tag_buf;
823 }
824
825 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
826 char_array_0(header_pid);
827
828 if (tag)
829 IOVEC_SET_STRING(iovec[n++], tag);
830
831 IOVEC_SET_STRING(iovec[n++], header_pid);
832 } else if (tag) {
833 IOVEC_SET_STRING(iovec[n++], tag);
834 IOVEC_SET_STRING(iovec[n++], ": ");
835 }
836
837 /* Fourth: message */
838 IOVEC_SET_STRING(iovec[n++], message);
839 IOVEC_SET_STRING(iovec[n++], "\n");
840
841 fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
842 if (fd < 0) {
843 log_debug("Failed to open /dev/kmsg for logging: %s", strerror(errno));
844 goto finish;
845 }
846
847 if (writev(fd, iovec, n) < 0)
848 log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
849
850 close_nointr_nofail(fd);
6e409ce1
LP		 851
852finish:
224f2ee2
LP		 853 free(tag_buf);
854}
855
856static void forward_console(Server *s, const char *tag, const char *message, struct ucred *ucred) {
857 struct iovec iovec[4];
858 char header_pid[16];
859 int n = 0, fd;
860 char *tag_buf = NULL;
861
862 assert(s);
863 assert(message);
864
865 /* First: tag and PID */
866 if (ucred) {
867 if (!tag) {
868 get_process_comm(ucred->pid, &tag_buf);
869 tag = tag_buf;
870 }
871
872 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
873 char_array_0(header_pid);
874
875 if (tag)
876 IOVEC_SET_STRING(iovec[n++], tag);
877
878 IOVEC_SET_STRING(iovec[n++], header_pid);
879 } else if (tag) {
880 IOVEC_SET_STRING(iovec[n++], tag);
881 IOVEC_SET_STRING(iovec[n++], ": ");
882 }
883
884 /* Third: message */
885 IOVEC_SET_STRING(iovec[n++], message);
886 IOVEC_SET_STRING(iovec[n++], "\n");
887
888 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
889 if (fd < 0) {
890 log_debug("Failed to open /dev/console for logging: %s", strerror(errno));
891 goto finish;
892 }
893
894 if (writev(fd, iovec, n) < 0)
895 log_debug("Failed to write to /dev/console for logging: %s", strerror(errno));
896
897 close_nointr_nofail(fd);
898
899finish:
900 free(tag_buf);
901}
902
903static void read_tag(const char **buf, char **tag) {
904 const char *p;
905 char *t;
906 size_t l, e;
907
908 assert(buf);
909 assert(tag);
910
911 p = *buf;
912
913 p += strspn(p, WHITESPACE);
914 l = strcspn(p, WHITESPACE);
915
916 if (l <= 0 ||
917 p[l-1] != ':')
918 return;
919
920 e = l;
921 l--;
922
923 if (p[l-1] == ']') {
924 size_t k = l-1;
925
926 for (;;) {
927
928 if (p[k] == '[') {
929 l = k;
930 break;
931 }
932
933 if (k == 0)
934 break;
935
936 k--;
937 }
938 }
939
940 t = strndup(p, l);
941 if (t)
942 *tag = t;
943
944 *buf = p + e;
945 *buf += strspn(*buf, WHITESPACE);
6e409ce1
LP		 946}
947
7f3e6257 948static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
224f2ee2
LP		 949 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_tag = NULL;
950 struct iovec iovec[N_IOVEC_META_FIELDS + 4];
7f3e6257
LP		 951 unsigned n = 0;
952 int priority = LOG_USER | LOG_INFO;
224f2ee2 953 char *tag = NULL;
7f3e6257
LP		 954
955 assert(s);
956 assert(buf);
957
224f2ee2
LP		 958 if (s->forward_to_syslog)
959 forward_syslog_raw(s, buf, ucred, tv);
960
7f3e6257
LP		 961 parse_syslog_priority((char**) &buf, &priority);
962 skip_syslog_date((char**) &buf);
224f2ee2
LP		 963 read_tag(&buf, &tag);
964
965 if (s->forward_to_kmsg)
966 forward_kmsg(s, priority, tag, buf, ucred);
967
968 if (s->forward_to_console)
969 forward_console(s, tag, buf, ucred);
7f3e6257
LP		 970
971 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
972 IOVEC_SET_STRING(iovec[n++], syslog_priority);
973
224f2ee2
LP		 974 if (priority & LOG_FACMASK)
975 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
976 IOVEC_SET_STRING(iovec[n++], syslog_facility);
977
978 if (tag) {
979 syslog_tag = strappend("SYSLOG_TAG=", tag);
980 if (syslog_tag)
981 IOVEC_SET_STRING(iovec[n++], syslog_tag);
982 }
7f3e6257
LP		 983
984 message = strappend("MESSAGE=", buf);
985 if (message)
986 IOVEC_SET_STRING(iovec[n++], message);
987
224f2ee2 988 dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, priority);
7f3e6257
LP		 989
990 free(message);
224f2ee2 991 free(tag);
87d2c1ff 992 free(syslog_priority);
224f2ee2
LP		 993 free(syslog_facility);
994 free(syslog_tag);
7f3e6257
LP		 995}
996
6ad1d1c3
LP		 997static bool valid_user_field(const char *p, size_t l) {
998 const char *a;
999
1000 /* We kinda enforce POSIX syntax recommendations for
1001 environment variables here, but make a couple of additional
1002 requirements.
1003
1004 http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
1005
1006 /* No empty field names */
1007 if (l <= 0)
1008 return false;
1009
1010 /* Don't allow names longer than 64 chars */
1011 if (l > 64)
1012 return false;
1013
1014 /* Variables starting with an underscore are protected */
1015 if (p[0] == '_')
1016 return false;
1017
1018 /* Don't allow digits as first character */
1019 if (p[0] >= '0' && p[0] <= '9')
1020 return false;
1021
1022 /* Only allow A-Z0-9 and '_' */
1023 for (a = p; a < p + l; a++)
1024 if (!((*a >= 'A' && *a <= 'Z') ||
1025 (*a >= '0' && *a <= '9') ||
1026 *a == '_'))
1027 return false;
1028
1029 return true;
1030}
1031
7f3e6257
LP		 1032static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
1033 struct iovec *iovec = NULL;
1034 unsigned n = 0, m = 0, j;
1035 const char *p;
1036 size_t remaining;
6e409ce1 1037 int priority = LOG_INFO;
224f2ee2 1038 char *tag = NULL, *message = NULL;
7f3e6257
LP		 1039
1040 assert(s);
1041 assert(buffer || n == 0);
1042
1043 p = buffer;
1044 remaining = buffer_size;
1045
1046 while (remaining > 0) {
1047 const char *e, *q;
1048
1049 e = memchr(p, '\n', remaining);
1050
1051 if (!e) {
1052 /* Trailing noise, let's ignore it, and flush what we collected */
1053 log_debug("Received message with trailing noise, ignoring.");
1054 break;
1055 }
1056
1057 if (e == p) {
1058 /* Entry separator */
6e409ce1 1059 dispatch_message(s, iovec, n, m, ucred, tv, priority);
7f3e6257 1060 n = 0;
6e409ce1 1061 priority = LOG_INFO;
7f3e6257
LP		 1062
1063 p++;
1064 remaining--;
1065 continue;
1066 }
1067
6ad1d1c3
LP		 1068 if (*p == '.' || *p == '#') {
1069 /* Ignore control commands for now, and
1070 * comments too. */
7f3e6257
LP		 1071 remaining -= (e - p) + 1;
1072 p = e + 1;
1073 continue;
1074 }
1075
1076 /* A property follows */
1077
224f2ee2 1078 if (n+N_IOVEC_META_FIELDS >= m) {
7f3e6257
LP		 1079 struct iovec *c;
1080 unsigned u;
1081
224f2ee2 1082 u = MAX((n+N_IOVEC_META_FIELDS) * 2U, 4U);
7f3e6257
LP		 1083 c = realloc(iovec, u * sizeof(struct iovec));
1084 if (!c) {
1085 log_error("Out of memory");
1086 break;
1087 }
1088
1089 iovec = c;
1090 m = u;
1091 }
1092
1093 q = memchr(p, '=', e - p);
1094 if (q) {
6ad1d1c3 1095 if (valid_user_field(p, q - p)) {
224f2ee2
LP		 1096 size_t l;
1097
1098 l = e - p;
1099
2b0ba69b
LP		 1100 /* If the field name starts with an
1101 * underscore, skip the variable,
1102 * since that indidates a trusted
1103 * field */
1104 iovec[n].iov_base = (char*) p;
224f2ee2 1105 iovec[n].iov_len = l;
2b0ba69b 1106 n++;
6e409ce1
LP		 1107
1108 /* We need to determine the priority
1109 * of this entry for the rate limiting
1110 * logic */
224f2ee2
LP		 1111 if (l == 10 &&
1112 memcmp(p, "PRIORITY=", 9) == 0 &&
1113 p[9] >= '0' && p[9] <= '9')
1114 priority = (priority & LOG_FACMASK) | (p[9] - '0');
1115
1116 else if (l == 17 &&
1117 memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
1118 p[16] >= '0' && p[16] <= '9')
1119 priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
1120
1121 else if (l == 18 &&
1122 memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
1123 p[16] >= '0' && p[16] <= '9' &&
1124 p[17] >= '0' && p[17] <= '9')
1125 priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
1126
1127 else if (l >= 12 &&
1128 memcmp(p, "SYSLOG_TAG=", 11) == 0) {
1129 char *t;
1130
1131 t = strndup(p + 11, l - 11);
1132 if (t) {
1133 free(tag);
1134 tag = t;
1135 }
1136 } else if (l >= 8 &&
1137 memcmp(p, "MESSAGE=", 8) == 0) {
1138 char *t;
1139
1140 t = strndup(p + 8, l - 8);
1141 if (t) {
1142 free(message);
1143 message = t;
1144 }
1145 }
2b0ba69b 1146 }
7f3e6257
LP		 1147
1148 remaining -= (e - p) + 1;
1149 p = e + 1;
1150 continue;
1151 } else {
1152 uint64_t l;
1153 char *k;
1154
1155 if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
1156 log_debug("Failed to parse message, ignoring.");
1157 break;
1158 }
1159
1160 memcpy(&l, e + 1, sizeof(uint64_t));
1161 l = le64toh(l);
1162
1163 if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
1164 e[1+sizeof(uint64_t)+l] != '\n') {
1165 log_debug("Failed to parse message, ignoring.");
1166 break;
1167 }
1168
1169 k = malloc((e - p) + 1 + l);
1170 if (!k) {
1171 log_error("Out of memory");
1172 break;
1173 }
1174
1175 memcpy(k, p, e - p);
1176 k[e - p] = '=';
1177 memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
1178
6ad1d1c3 1179 if (valid_user_field(p, e - p)) {
2b0ba69b
LP		 1180 iovec[n].iov_base = k;
1181 iovec[n].iov_len = (e - p) + 1 + l;
1182 n++;
1183 } else
1184 free(k);
7f3e6257
LP		 1185
1186 remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
1187 p = e + 1 + sizeof(uint64_t) + l + 1;
1188 }
1189 }
1190
224f2ee2
LP		 1191 if (message) {
1192 if (s->forward_to_syslog)
1193 forward_syslog(s, priority, tag, message, ucred, tv);
1194
1195 if (s->forward_to_kmsg)
1196 forward_kmsg(s, priority, tag, message, ucred);
1197
1198 if (s->forward_to_console)
1199 forward_console(s, tag, message, ucred);
1200 }
1201
6e409ce1 1202 dispatch_message(s, iovec, n, m, ucred, tv, priority);
7f3e6257
LP		 1203
1204 for (j = 0; j < n; j++)
1205 if (iovec[j].iov_base < buffer ||
1206 (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
1207 free(iovec[j].iov_base);
224f2ee2
LP		 1208
1209 free(tag);
1210 free(message);
87d2c1ff
LP		 1211}
1212
224f2ee2
LP		 1213static int stdout_stream_log(StdoutStream *s, const char *p) {
1214 struct iovec iovec[N_IOVEC_META_FIELDS + 4];
1215 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_tag = NULL;
fe652127 1216 unsigned n = 0;
fe652127
LP		 1217 int priority;
1218
87d2c1ff 1219 assert(s);
fe652127
LP		 1220 assert(p);
1221
1222 priority = s->priority;
1223
224f2ee2
LP		 1224 if (s->priority_prefix)
1225 parse_syslog_priority((char**) &p, &priority);
fe652127 1226
224f2ee2
LP		 1227 if (s->forward_to_syslog || s->server->forward_to_syslog)
1228 forward_syslog(s->server, fixup_priority(priority), s->tag, p, &s->ucred, NULL);
fe652127 1229
224f2ee2
LP		 1230 if (s->forward_to_kmsg || s->server->forward_to_kmsg)
1231 forward_kmsg(s->server, priority, s->tag, p, &s->ucred);
fe652127 1232
224f2ee2
LP		 1233 if (s->forward_to_console || s->server->forward_to_console)
1234 forward_console(s->server, s->tag, p, &s->ucred);
1235
1236 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
fe652127
LP		 1237 IOVEC_SET_STRING(iovec[n++], syslog_priority);
1238
224f2ee2
LP		 1239 if (priority & LOG_FACMASK)
1240 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
1241 IOVEC_SET_STRING(iovec[n++], syslog_facility);
fe652127 1242
224f2ee2
LP		 1243 if (s->tag) {
1244 syslog_tag = strappend("SYSLOG_TAG=", s->tag);
1245 if (syslog_tag)
1246 IOVEC_SET_STRING(iovec[n++], syslog_tag);
87d2c1ff
LP		 1247 }
1248
224f2ee2
LP		 1249 message = strappend("MESSAGE=", p);
1250 if (message)
1251 IOVEC_SET_STRING(iovec[n++], message);
fe652127 1252
224f2ee2 1253 dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority);
fe652127
LP		 1254
1255 free(message);
1256 free(syslog_priority);
224f2ee2
LP		 1257 free(syslog_facility);
1258 free(syslog_tag);
fe652127
LP		 1259
1260 return 0;
1261}
1262
224f2ee2
LP		 1263static int stdout_stream_line(StdoutStream *s, char *p) {
1264 int r;
1265
fe652127
LP		 1266 assert(s);
1267 assert(p);
1268
224f2ee2 1269 p = strstrip(p);
fe652127
LP		 1270
1271 switch (s->state) {
1272
1273 case STDOUT_STREAM_TAG:
224f2ee2
LP		 1274 s->tag = strdup(p);
1275 if (!s->tag) {
1276 log_error("Out of memory");
1277 return -ENOMEM;
fe652127
LP		 1278 }
1279
1280 s->state = STDOUT_STREAM_PRIORITY;
1281 return 0;
1282
1283 case STDOUT_STREAM_PRIORITY:
224f2ee2
LP		 1284 r = safe_atoi(p, &s->priority);
1285 if (r < 0 || s->priority <= 0 || s->priority >= 999) {
fe652127
LP		 1286 log_warning("Failed to parse log priority line.");
1287 return -EINVAL;
1288 }
1289
fe652127
LP		 1290 s->state = STDOUT_STREAM_PRIORITY_PREFIX;
1291 return 0;
1292
1293 case STDOUT_STREAM_PRIORITY_PREFIX:
224f2ee2
LP		 1294 r = parse_boolean(p);
1295 if (r < 0) {
fe652127
LP		 1296 log_warning("Failed to parse priority prefix line.");
1297 return -EINVAL;
1298 }
1299
224f2ee2
LP		 1300 s->priority_prefix = !!r;
1301 s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
fe652127
LP		 1302 return 0;
1303
224f2ee2
LP		 1304 case STDOUT_STREAM_FORWARD_TO_SYSLOG:
1305 r = parse_boolean(p);
1306 if (r < 0) {
1307 log_warning("Failed to parse forward to syslog line.");
fe652127
LP		 1308 return -EINVAL;
1309 }
1310
224f2ee2
LP		 1311 s->forward_to_syslog = !!r;
1312 s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
1313 return 0;
1314
1315 case STDOUT_STREAM_FORWARD_TO_KMSG:
1316 r = parse_boolean(p);
1317 if (r < 0) {
1318 log_warning("Failed to parse copy to kmsg line.");
1319 return -EINVAL;
1320 }
1321
1322 s->forward_to_kmsg = !!r;
1323 s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
1324 return 0;
1325
1326 case STDOUT_STREAM_FORWARD_TO_CONSOLE:
1327 r = parse_boolean(p);
1328 if (r < 0) {
1329 log_warning("Failed to parse copy to console line.");
1330 return -EINVAL;
1331 }
1332
1333 s->forward_to_console = !!r;
fe652127
LP		 1334 s->state = STDOUT_STREAM_RUNNING;
1335 return 0;
1336
1337 case STDOUT_STREAM_RUNNING:
224f2ee2 1338 return stdout_stream_log(s, p);
fe652127
LP		 1339 }
1340
1341 assert_not_reached("Unknown stream state");
1342}
1343
1344static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
1345 char *p;
1346 size_t remaining;
1347 int r;
1348
1349 assert(s);
1350
1351 p = s->buffer;
1352 remaining = s->length;
1353 for (;;) {
1354 char *end;
1355 size_t skip;
1356
1357 end = memchr(p, '\n', remaining);
224f2ee2 1358 if (end)
fe652127 1359 skip = end - p + 1;
224f2ee2
LP		 1360 else if (remaining >= sizeof(s->buffer) - 1) {
1361 end = p + sizeof(s->buffer) - 1;
1362 skip = sizeof(s->buffer) - 1;
1363 } else
1364 break;
1365
1366 *end = 0;
fe652127 1367
224f2ee2 1368 r = stdout_stream_line(s, p);
fe652127
LP		 1369 if (r < 0)
1370 return r;
1371
1372 remaining -= skip;
1373 p += skip;
1374 }
1375
1376 if (force_flush && remaining > 0) {
224f2ee2
LP		 1377 p[remaining] = 0;
1378 r = stdout_stream_line(s, p);
fe652127
LP		 1379 if (r < 0)
1380 return r;
1381
1382 p += remaining;
1383 remaining = 0;
1384 }
1385
1386 if (p > s->buffer) {
1387 memmove(s->buffer, p, remaining);
1388 s->length = remaining;
1389 }
1390
1391 return 0;
1392}
1393
1394static int stdout_stream_process(StdoutStream *s) {
1395 ssize_t l;
1396 int r;
1397
1398 assert(s);
1399
1400 l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
1401 if (l < 0) {
1402
1403 if (errno == EAGAIN)
1404 return 0;
1405
1406 log_warning("Failed to read from stream: %m");
1407 return -errno;
1408 }
1409
1410 if (l == 0) {
1411 r = stdout_stream_scan(s, true);
1412 if (r < 0)
1413 return r;
1414
1415 return 0;
1416 }
1417
1418 s->length += l;
1419 r = stdout_stream_scan(s, false);
1420 if (r < 0)
1421 return r;
1422
1423 return 1;
1424
1425}
1426
1427static void stdout_stream_free(StdoutStream *s) {
1428 assert(s);
1429
1430 if (s->server) {
1431 assert(s->server->n_stdout_streams > 0);
1432 s->server->n_stdout_streams --;
1433 LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
1434 }
1435
1436 if (s->fd >= 0) {
1437 if (s->server)
1438 epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
1439
1440 close_nointr_nofail(s->fd);
1441 }
1442
1443 free(s->tag);
1444 free(s);
1445}
1446
1447static int stdout_stream_new(Server *s) {
1448 StdoutStream *stream;
1449 int fd, r;
1450 socklen_t len;
1451 struct epoll_event ev;
1452
1453 assert(s);
1454
1455 fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
1456 if (fd < 0) {
1457 if (errno == EAGAIN)
1458 return 0;
1459
1460 log_error("Failed to accept stdout connection: %m");
1461 return -errno;
1462 }
1463
1464 if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
1465 log_warning("Too many stdout streams, refusing connection.");
1466 close_nointr_nofail(fd);
1467 return 0;
1468 }
1469
1470 stream = new0(StdoutStream, 1);
1471 if (!stream) {
1472 log_error("Out of memory.");
1473 close_nointr_nofail(fd);
1474 return -ENOMEM;
1475 }
1476
1477 stream->fd = fd;
1478
1479 len = sizeof(stream->ucred);
1480 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
1481 log_error("Failed to determine peer credentials: %m");
1482 r = -errno;
1483 goto fail;
1484 }
1485
1486 if (shutdown(fd, SHUT_WR) < 0) {
1487 log_error("Failed to shutdown writing side of socket: %m");
1488 r = -errno;
1489 goto fail;
1490 }
1491
1492 zero(ev);
1493 ev.data.ptr = stream;
1494 ev.events = EPOLLIN;
1495 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
1496 log_error("Failed to add stream to event loop: %m");
1497 r = -errno;
1498 goto fail;
1499 }
1500
1501 stream->server = s;
1502 LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
1503 s->n_stdout_streams ++;
1504
1505 return 0;
1506
1507fail:
1508 stdout_stream_free(stream);
1509 return r;
1510}
1511
cf244689
LP		 1512static int system_journal_open(Server *s) {
1513 int r;
1514 char *fn;
1515 sd_id128_t machine;
1516 char ids[33];
1517
1518 r = sd_id128_get_machine(&machine);
1519 if (r < 0)
1520 return r;
1521
1522 sd_id128_to_string(machine, ids);
1523
1524 if (!s->system_journal) {
1525
1526 /* First try to create the machine path, but not the prefix */
1527 fn = strappend("/var/log/journal/", ids);
1528 if (!fn)
1529 return -ENOMEM;
1530 (void) mkdir(fn, 0755);
1531 free(fn);
1532
1533 /* The create the system journal file */
1534 fn = join("/var/log/journal/", ids, "/system.journal", NULL);
1535 if (!fn)
1536 return -ENOMEM;
1537
1538 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
1539 free(fn);
1540
1541 if (r >= 0) {
babfc091
LP		 1542 journal_default_metrics(&s->system_metrics, s->system_journal->fd);
1543
1544 s->system_journal->metrics = s->system_metrics;
cf244689
LP		 1545 s->system_journal->compress = s->compress;
1546
1547 fix_perms(s->system_journal, 0);
1548 } else if (r < 0) {
1549
adf7d506
LP		 1550 if (r != -ENOENT && r != -EROFS)
1551 log_warning("Failed to open system journal: %s", strerror(-r));
1552
1553 r = 0;
cf244689
LP		 1554 }
1555 }
1556
1557 if (!s->runtime_journal) {
1558
1559 fn = join("/run/log/journal/", ids, "/system.journal", NULL);
1560 if (!fn)
1561 return -ENOMEM;
1562
1563 if (s->system_journal) {
1564
1565 /* Try to open the runtime journal, but only
1566 * if it already exists, so that we can flush
1567 * it into the system journal */
1568
1569 r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal);
1570 free(fn);
1571
1572 if (r < 0) {
adf7d506
LP		 1573 if (r != -ENOENT)
1574 log_warning("Failed to open runtime journal: %s", strerror(-r));
cf244689 1575
adf7d506 1576 r = 0;
cf244689
LP		 1577 }
1578
1579 } else {
1580
1581 /* OK, we really need the runtime journal, so create
1582 * it if necessary. */
1583
1584 (void) mkdir_parents(fn, 0755);
1585 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
1586 free(fn);
1587
1588 if (r < 0) {
1589 log_error("Failed to open runtime journal: %s", strerror(-r));
1590 return r;
1591 }
1592 }
1593
1594 if (s->runtime_journal) {
babfc091
LP		 1595 journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
1596
1597 s->runtime_journal->metrics = s->runtime_metrics;
cf244689
LP		 1598 s->runtime_journal->compress = s->compress;
1599
1600 fix_perms(s->runtime_journal, 0);
1601 }
1602 }
1603
1604 return r;
1605}
1606
1607static int server_flush_to_var(Server *s) {
1608 char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
1609 Object *o = NULL;
1610 int r;
1611 sd_id128_t machine;
1612 sd_journal *j;
54a7b863 1613 usec_t ts;
cf244689
LP		 1614
1615 assert(s);
1616
54a7b863
LP		 1617 if (!s->runtime_journal)
1618 return 0;
1619
1620 ts = now(CLOCK_MONOTONIC);
1621 if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
1622 return 0;
1623
1624 s->var_available_timestamp = ts;
1625
cf244689
LP		 1626 system_journal_open(s);
1627
54a7b863 1628 if (!s->system_journal)
cf244689
LP		 1629 return 0;
1630
1631 r = sd_id128_get_machine(&machine);
1632 if (r < 0) {
1633 log_error("Failed to get machine id: %s", strerror(-r));
1634 return r;
1635 }
1636
1637 r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
1638 if (r < 0) {
1639 log_error("Failed to read runtime journal: %s", strerror(-r));
1640 return r;
1641 }
1642
1643 SD_JOURNAL_FOREACH(j) {
1644 JournalFile *f;
1645
1646 f = j->current_file;
1647 assert(f && f->current_offset > 0);
1648
1649 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1650 if (r < 0) {
1651 log_error("Can't read entry: %s", strerror(-r));
1652 goto finish;
1653 }
1654
1655 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
1656 if (r == -E2BIG) {
1657 log_info("Allocation limit reached.");
1658
1659 journal_file_post_change(s->system_journal);
b1a0ab71 1660 server_rotate(s);
cf244689
LP		 1661 server_vacuum(s);
1662
1663 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
1664 }
1665
1666 if (r < 0) {
1667 log_error("Can't write entry: %s", strerror(-r));
1668 goto finish;
1669 }
1670 }
1671
1672finish:
1673 journal_file_post_change(s->system_journal);
1674
1675 journal_file_close(s->runtime_journal);
1676 s->runtime_journal = NULL;
1677
1678 if (r >= 0) {
1679 sd_id128_to_string(machine, path + 17);
1680 rm_rf(path, false, true, false);
1681 }
1682
1683 return r;
1684}
1685
fe652127
LP		 1686static int process_event(Server *s, struct epoll_event *ev) {
1687 assert(s);
1688
87d2c1ff
LP		 1689 if (ev->data.fd == s->signal_fd) {
1690 struct signalfd_siginfo sfsi;
1691 ssize_t n;
1692
fe652127
LP		 1693 if (ev->events != EPOLLIN) {
1694 log_info("Got invalid event from epoll.");
1695 return -EIO;
1696 }
1697
87d2c1ff
LP		 1698 n = read(s->signal_fd, &sfsi, sizeof(sfsi));
1699 if (n != sizeof(sfsi)) {
1700
1701 if (n >= 0)
1702 return -EIO;
1703
1704 if (errno == EINTR || errno == EAGAIN)
1705 return 0;
1706
1707 return -errno;
1708 }
1709
cf244689
LP		 1710 if (sfsi.ssi_signo == SIGUSR1) {
1711 server_flush_to_var(s);
1712 return 0;
1713 }
1714
87d2c1ff
LP		 1715 log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
1716 return 0;
1717
fe652127
LP		 1718 } else if (ev->data.fd == s->native_fd ||
1719 ev->data.fd == s->syslog_fd) {
1720
1721 if (ev->events != EPOLLIN) {
1722 log_info("Got invalid event from epoll.");
1723 return -EIO;
1724 }
cec736d2 1725
87d2c1ff 1726 for (;;) {
87d2c1ff
LP		 1727 struct msghdr msghdr;
1728 struct iovec iovec;
1729 struct ucred *ucred = NULL;
1730 struct timeval *tv = NULL;
1731 struct cmsghdr *cmsg;
1732 union {
1733 struct cmsghdr cmsghdr;
1734 uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
1735 CMSG_SPACE(sizeof(struct timeval))];
1736 } control;
1737 ssize_t n;
7f3e6257
LP		 1738 int v;
1739
1740 if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
1741 log_error("SIOCINQ failed: %m");
1742 return -errno;
1743 }
1744
1745 if (v <= 0)
1746 return 1;
1747
1748 if (s->buffer_size < (size_t) v) {
1749 void *b;
1750 size_t l;
1751
1752 l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
1753 b = realloc(s->buffer, l+1);
1754
1755 if (!b) {
1756 log_error("Couldn't increase buffer.");
1757 return -ENOMEM;
1758 }
1759
1760 s->buffer_size = l;
1761 s->buffer = b;
1762 }
87d2c1ff
LP		 1763
1764 zero(iovec);
7f3e6257
LP		 1765 iovec.iov_base = s->buffer;
1766 iovec.iov_len = s->buffer_size;
87d2c1ff
LP		 1767
1768 zero(control);
1769 zero(msghdr);
1770 msghdr.msg_iov = &iovec;
1771 msghdr.msg_iovlen = 1;
1772 msghdr.msg_control = &control;
1773 msghdr.msg_controllen = sizeof(control);
1774
1775 n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT);
1776 if (n < 0) {
1777
1778 if (errno == EINTR || errno == EAGAIN)
1779 return 1;
1780
1781 log_error("recvmsg() failed: %m");
1782 return -errno;
1783 }
1784
1785 for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
1786
1787 if (cmsg->cmsg_level == SOL_SOCKET &&
1788 cmsg->cmsg_type == SCM_CREDENTIALS &&
1789 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
1790 ucred = (struct ucred*) CMSG_DATA(cmsg);
1791 else if (cmsg->cmsg_level == SOL_SOCKET &&
1792 cmsg->cmsg_type == SO_TIMESTAMP &&
1793 cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
1794 tv = (struct timeval*) CMSG_DATA(cmsg);
1795 }
1796
7f3e6257
LP		 1797 if (ev->data.fd == s->syslog_fd) {
1798 char *e;
1799
1800 e = memchr(s->buffer, '\n', n);
1801 if (e)
1802 *e = 0;
1803 else
1804 s->buffer[n] = 0;
87d2c1ff 1805
7f3e6257
LP		 1806 process_syslog_message(s, strstrip(s->buffer), ucred, tv);
1807 } else
1808 process_native_message(s, s->buffer, n, ucred, tv);
87d2c1ff 1809 }
cec736d2
LP		 1810
1811 return 1;
fe652127
LP		 1812
1813 } else if (ev->data.fd == s->stdout_fd) {
1814
1815 if (ev->events != EPOLLIN) {
1816 log_info("Got invalid event from epoll.");
1817 return -EIO;
1818 }
1819
1820 stdout_stream_new(s);
1821 return 1;
1822
1823 } else {
1824 StdoutStream *stream;
1825
1826 if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
1827 log_info("Got invalid event from epoll.");
1828 return -EIO;
1829 }
1830
1831 /* If it is none of the well-known fds, it must be an
1832 * stdout stream fd. Note that this is a bit ugly here
1833 * (since we rely that none of the well-known fds
1834 * could be interpreted as pointer), but nonetheless
1835 * safe, since the well-known fds would never get an
1836 * fd > 4096, i.e. beyond the first memory page */
1837
1838 stream = ev->data.ptr;
1839
1840 if (stdout_stream_process(stream) <= 0)
1841 stdout_stream_free(stream);
1842
1843 return 1;
87d2c1ff
LP		 1844 }
1845
cec736d2
LP		 1846 log_error("Unknown event.");
1847 return 0;
87d2c1ff
LP		 1848}
1849
7f3e6257
LP		 1850static int open_syslog_socket(Server *s) {
1851 union sockaddr_union sa;
1852 int one, r;
fe652127 1853 struct epoll_event ev;
8b18eb67 1854 struct timeval tv;
87d2c1ff
LP		 1855
1856 assert(s);
1857
7f3e6257 1858 if (s->syslog_fd < 0) {
87d2c1ff 1859
7f3e6257
LP		 1860 s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1861 if (s->syslog_fd < 0) {
1862 log_error("socket() failed: %m");
1863 return -errno;
1864 }
1865
1866 zero(sa);
1867 sa.un.sun_family = AF_UNIX;
8b18eb67 1868 strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
7f3e6257
LP		 1869
1870 unlink(sa.un.sun_path);
1871
1872 r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1873 if (r < 0) {
1874 log_error("bind() failed: %m");
1875 return -errno;
1876 }
1877
1878 chmod(sa.un.sun_path, 0666);
87d2c1ff
LP		 1879 }
1880
7f3e6257
LP		 1881 one = 1;
1882 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
1883 if (r < 0) {
1884 log_error("SO_PASSCRED failed: %m");
1885 return -errno;
87d2c1ff
LP		 1886 }
1887
7f3e6257
LP		 1888 one = 1;
1889 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
1890 if (r < 0) {
1891 log_error("SO_TIMESTAMP failed: %m");
1892 return -errno;
87d2c1ff
LP		 1893 }
1894
8b18eb67
LP		 1895 /* Since we use the same socket for forwarding this to some
1896 * other syslog implementation, make sure we don't hang
1897 * forever */
1898 timeval_store(&tv, SYSLOG_TIMEOUT_USEC);
1899 if (setsockopt(s->syslog_fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
1900 log_error("SO_SNDTIMEO failed: %m");
1901 return -errno;
1902 }
1903
fe652127
LP		 1904 zero(ev);
1905 ev.events = EPOLLIN;
1906 ev.data.fd = s->syslog_fd;
1907 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
1908 log_error("Failed to add syslog server fd to epoll object: %m");
1909 return -errno;
1910 }
1911
7f3e6257
LP		 1912 return 0;
1913}
87d2c1ff 1914
7f3e6257
LP		 1915static int open_native_socket(Server*s) {
1916 union sockaddr_union sa;
1917 int one, r;
fe652127 1918 struct epoll_event ev;
7f3e6257
LP		 1919
1920 assert(s);
1921
1922 if (s->native_fd < 0) {
1923
1924 s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1925 if (s->native_fd < 0) {
87d2c1ff
LP		 1926 log_error("socket() failed: %m");
1927 return -errno;
1928 }
1929
1930 zero(sa);
1931 sa.un.sun_family = AF_UNIX;
259d2e76 1932 strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
87d2c1ff
LP		 1933
1934 unlink(sa.un.sun_path);
1935
7f3e6257 1936 r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
87d2c1ff
LP		 1937 if (r < 0) {
1938 log_error("bind() failed: %m");
1939 return -errno;
1940 }
1941
1942 chmod(sa.un.sun_path, 0666);
1943 }
1944
1945 one = 1;
7f3e6257 1946 r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
87d2c1ff
LP		 1947 if (r < 0) {
1948 log_error("SO_PASSCRED failed: %m");
1949 return -errno;
1950 }
1951
1952 one = 1;
7f3e6257 1953 r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
87d2c1ff
LP		 1954 if (r < 0) {
1955 log_error("SO_TIMESTAMP failed: %m");
1956 return -errno;
1957 }
1958
fe652127
LP		 1959 zero(ev);
1960 ev.events = EPOLLIN;
1961 ev.data.fd = s->native_fd;
1962 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
1963 log_error("Failed to add native server fd to epoll object: %m");
1964 return -errno;
1965 }
1966
7f3e6257
LP		 1967 return 0;
1968}
1969
fe652127
LP		 1970static int open_stdout_socket(Server *s) {
1971 union sockaddr_union sa;
1972 int r;
7f3e6257 1973 struct epoll_event ev;
fe652127
LP		 1974
1975 assert(s);
1976
1977 if (s->stdout_fd < 0) {
1978
1979 s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
1980 if (s->stdout_fd < 0) {
1981 log_error("socket() failed: %m");
1982 return -errno;
1983 }
1984
1985 zero(sa);
1986 sa.un.sun_family = AF_UNIX;
259d2e76 1987 strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
fe652127
LP		 1988
1989 unlink(sa.un.sun_path);
1990
1991 r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1992 if (r < 0) {
1993 log_error("bind() failed: %m");
1994 return -errno;
1995 }
1996
1997 chmod(sa.un.sun_path, 0666);
1998
1999 if (listen(s->stdout_fd, SOMAXCONN) < 0) {
2000 log_error("liste() failed: %m");
2001 return -errno;
2002 }
2003 }
2004
2005 zero(ev);
2006 ev.events = EPOLLIN;
2007 ev.data.fd = s->stdout_fd;
2008 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) {
2009 log_error("Failed to add stdout server fd to epoll object: %m");
2010 return -errno;
2011 }
2012
2013 return 0;
2014}
2015
2016static int open_signalfd(Server *s) {
7f3e6257 2017 sigset_t mask;
fe652127
LP		 2018 struct epoll_event ev;
2019
2020 assert(s);
2021
2022 assert_se(sigemptyset(&mask) == 0);
cf244689 2023 sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, -1);
fe652127
LP		 2024 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
2025
2026 s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
2027 if (s->signal_fd < 0) {
2028 log_error("signalfd(): %m");
2029 return -errno;
2030 }
2031
2032 zero(ev);
2033 ev.events = EPOLLIN;
2034 ev.data.fd = s->signal_fd;
2035
2036 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) {
2037 log_error("epoll_ctl(): %m");
2038 return -errno;
2039 }
2040
2041 return 0;
2042}
2043
e6960940
LP		 2044static int server_parse_config_file(Server *s) {
2045 FILE *f;
2046 const char *fn;
2047 int r;
2048
2049 assert(s);
2050
2051 fn = "/etc/systemd/systemd-journald.conf";
2052 f = fopen(fn, "re");
2053 if (!f) {
2054 if (errno == ENOENT)
2055 return 0;
2056
2057 log_warning("Failed to open configuration file %s: %m", fn);
2058 return -errno;
2059 }
2060
2061 r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s);
2062 if (r < 0)
2063 log_warning("Failed to parse configuration file: %s", strerror(-r));
2064
2065 fclose(f);
2066
2067 return r;
2068}
2069
fe652127
LP		 2070static int server_init(Server *s) {
2071 int n, r, fd;
7f3e6257
LP		 2072
2073 assert(s);
2074
2075 zero(*s);
fe652127 2076 s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
807e17f0 2077 s->compress = true;
7f3e6257 2078
e6960940
LP		 2079 s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
2080 s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
2081
224f2ee2
LP		 2082 s->forward_to_syslog = true;
2083
babfc091
LP		 2084 memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
2085 memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
2086
e6960940
LP		 2087 server_parse_config_file(s);
2088
fe652127
LP		 2089 s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
2090 if (!s->user_journals) {
2091 log_error("Out of memory.");
2092 return -ENOMEM;
2093 }
2094
7f3e6257
LP		 2095 s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
2096 if (s->epoll_fd < 0) {
2097 log_error("Failed to create epoll object: %m");
2098 return -errno;
2099 }
2100
2101 n = sd_listen_fds(true);
2102 if (n < 0) {
2103 log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
2104 return n;
2105 }
2106
2107 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
2108
259d2e76 2109 if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) {
7f3e6257 2110
fe652127
LP		 2111 if (s->native_fd >= 0) {
2112 log_error("Too many native sockets passed.");
7f3e6257
LP		 2113 return -EINVAL;
2114 }
2115
fe652127 2116 s->native_fd = fd;
7f3e6257 2117
259d2e76 2118 } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) {
7f3e6257 2119
fe652127
LP		 2120 if (s->stdout_fd >= 0) {
2121 log_error("Too many stdout sockets passed.");
7f3e6257
LP		 2122 return -EINVAL;
2123 }
2124
fe652127
LP		 2125 s->stdout_fd = fd;
2126
2127 } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
2128
2129 if (s->syslog_fd >= 0) {
2130 log_error("Too many /dev/log sockets passed.");
2131 return -EINVAL;
2132 }
2133
2134 s->syslog_fd = fd;
2135
7f3e6257
LP		 2136 } else {
2137 log_error("Unknown socket passed.");
2138 return -EINVAL;
2139 }
2140 }
2141
2142 r = open_syslog_socket(s);
2143 if (r < 0)
2144 return r;
2145
7f3e6257
LP		 2146 r = open_native_socket(s);
2147 if (r < 0)
2148 return r;
2149
fe652127
LP		 2150 r = open_stdout_socket(s);
2151 if (r < 0)
2152 return r;
87d2c1ff 2153
ed49ef3f
LP		 2154 r = system_journal_open(s);
2155 if (r < 0)
87d2c1ff 2156 return r;
87d2c1ff 2157
fe652127
LP		 2158 r = open_signalfd(s);
2159 if (r < 0)
2160 return r;
87d2c1ff 2161
e6960940 2162 s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst);
6e409ce1
LP		 2163 if (!s->rate_limit)
2164 return -ENOMEM;
2165
87d2c1ff
LP		 2166 return 0;
2167}
2168
2169static void server_done(Server *s) {
2170 JournalFile *f;
2171 assert(s);
2172
fe652127
LP		 2173 while (s->stdout_streams)
2174 stdout_stream_free(s->stdout_streams);
2175
87d2c1ff
LP		 2176 if (s->system_journal)
2177 journal_file_close(s->system_journal);
2178
f4b47811
LP		 2179 if (s->runtime_journal)
2180 journal_file_close(s->runtime_journal);
2181
87d2c1ff
LP		 2182 while ((f = hashmap_steal_first(s->user_journals)))
2183 journal_file_close(f);
2184
2185 hashmap_free(s->user_journals);
2186
2187 if (s->epoll_fd >= 0)
2188 close_nointr_nofail(s->epoll_fd);
2189
2190 if (s->signal_fd >= 0)
2191 close_nointr_nofail(s->signal_fd);
2192
2193 if (s->syslog_fd >= 0)
2194 close_nointr_nofail(s->syslog_fd);
7f3e6257
LP		 2195
2196 if (s->native_fd >= 0)
2197 close_nointr_nofail(s->native_fd);
fe652127
LP		 2198
2199 if (s->stdout_fd >= 0)
2200 close_nointr_nofail(s->stdout_fd);
6e409ce1
LP		 2201
2202 if (s->rate_limit)
2203 journal_rate_limit_free(s->rate_limit);
783d2675
LP		 2204
2205 free(s->buffer);
87d2c1ff
LP		 2206}
2207
2208int main(int argc, char *argv[]) {
2209 Server server;
2210 int r;
2211
2212 /* if (getppid() != 1) { */
2213 /* log_error("This program should be invoked by init only."); */
2214 /* return EXIT_FAILURE; */
2215 /* } */
2216
2217 if (argc > 1) {
2218 log_error("This program does not take arguments.");
2219 return EXIT_FAILURE;
2220 }
2221
f4b47811 2222 log_set_target(LOG_TARGET_CONSOLE);
87d2c1ff
LP		 2223 log_parse_environment();
2224 log_open();
2225
2226 umask(0022);
2227
2228 r = server_init(&server);
2229 if (r < 0)
2230 goto finish;
2231
e6960940
LP		 2232 server_vacuum(&server);
2233 server_flush_to_var(&server);
2234
87d2c1ff 2235 log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
224f2ee2 2236 driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
87d2c1ff
LP		 2237
2238 sd_notify(false,
2239 "READY=1\n"
fe652127 2240 "STATUS=Processing requests...");
50f20cfd 2241
87d2c1ff
LP		 2242 for (;;) {
2243 struct epoll_event event;
2244
2245 r = epoll_wait(server.epoll_fd, &event, 1, -1);
2246 if (r < 0) {
2247
2248 if (errno == EINTR)
2249 continue;
2250
2251 log_error("epoll_wait() failed: %m");
2252 r = -errno;
2253 goto finish;
2254 } else if (r == 0)
2255 break;
2256
2257 r = process_event(&server, &event);
2258 if (r < 0)
2259 goto finish;
2260 else if (r == 0)
2261 break;
2262 }
2263
fe652127 2264 log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
224f2ee2 2265 driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
fe652127 2266
87d2c1ff
LP		 2267finish:
2268 sd_notify(false,
2269 "STATUS=Shutting down...");
2270
2271 server_done(&server);
2272
2273 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
2274}
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