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journal: Don't hold pointers to journal while remapping
[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>
7f3e6257
LP		 28#include <stddef.h>
29#include <sys/ioctl.h>
30#include <linux/sockios.h>
6e409ce1 31#include <sys/statvfs.h>
2d44fc7b 32#include <sys/user.h>
87d2c1ff 33
81527be1
LP		 34#include <systemd/sd-journal.h>
35#include <systemd/sd-login.h>
36#include <systemd/sd-messages.h>
37#include <systemd/sd-daemon.h>
38
87d2c1ff 39#include "hashmap.h"
cec736d2 40#include "journal-file.h"
87d2c1ff 41#include "socket-util.h"
69e5d42d 42#include "cgroup-util.h"
fe652127 43#include "list.h"
6e409ce1 44#include "journal-rate-limit.h"
cf244689 45#include "journal-internal.h"
e6960940
LP		 46#include "conf-parser.h"
47#include "journald.h"
effb1102 48#include "virt.h"
7f2c63cb 49#include "missing.h"
87d2c1ff 50
e6520a0f
LP		 51#ifdef HAVE_ACL
52#include <sys/acl.h>
53#include <acl/libacl.h>
54#include "acl-util.h"
55#endif
56
8a0f04e6
LP		 57#ifdef HAVE_SELINUX
58#include <selinux/selinux.h>
59#endif
60
cab8ac60 61#define USER_JOURNALS_MAX 1024
fe652127
LP		 62#define STDOUT_STREAMS_MAX 4096
63
de97b26a
LP		 64#define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
65#define DEFAULT_RATE_LIMIT_BURST 200
66
9cfb57c9
LP		 67#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
68
54a7b863
LP		 69#define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
70
8a0f04e6 71#define N_IOVEC_META_FIELDS 17
224f2ee2 72
0dad12c1
LP		 73#define ENTRY_SIZE_MAX (1024*1024*32)
74
fe652127 75typedef enum StdoutStreamState {
4cd9a9d9 76 STDOUT_STREAM_IDENTIFIER,
fe652127 77 STDOUT_STREAM_PRIORITY,
258cdffc 78 STDOUT_STREAM_LEVEL_PREFIX,
224f2ee2
LP		 79 STDOUT_STREAM_FORWARD_TO_SYSLOG,
80 STDOUT_STREAM_FORWARD_TO_KMSG,
81 STDOUT_STREAM_FORWARD_TO_CONSOLE,
fe652127
LP		 82 STDOUT_STREAM_RUNNING
83} StdoutStreamState;
84
85struct StdoutStream {
86 Server *server;
87 StdoutStreamState state;
88
89 int fd;
90
91 struct ucred ucred;
7f2c63cb
LP		 92#ifdef HAVE_SELINUX
93 security_context_t security_context;
94#endif
fe652127 95
4cd9a9d9 96 char *identifier;
fe652127 97 int priority;
258cdffc 98 bool level_prefix:1;
224f2ee2
LP		 99 bool forward_to_syslog:1;
100 bool forward_to_kmsg:1;
101 bool forward_to_console:1;
fe652127
LP		 102
103 char buffer[LINE_MAX+1];
104 size_t length;
105
106 LIST_FIELDS(StdoutStream, stdout_stream);
107};
108
cf244689
LP		 109static int server_flush_to_var(Server *s);
110
6e409ce1 111static uint64_t available_space(Server *s) {
babfc091 112 char ids[33], *p;
6e409ce1 113 const char *f;
babfc091 114 sd_id128_t machine;
6e409ce1
LP		 115 struct statvfs ss;
116 uint64_t sum = 0, avail = 0, ss_avail = 0;
117 int r;
118 DIR *d;
babfc091
LP		 119 usec_t ts;
120 JournalMetrics *m;
121
122 ts = now(CLOCK_MONOTONIC);
9cfb57c9
LP		 123
124 if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts)
125 return s->cached_available_space;
6e409ce1
LP		 126
127 r = sd_id128_get_machine(&machine);
128 if (r < 0)
129 return 0;
130
babfc091 131 if (s->system_journal) {
6e409ce1 132 f = "/var/log/journal/";
babfc091
LP		 133 m = &s->system_metrics;
134 } else {
6e409ce1 135 f = "/run/log/journal/";
babfc091
LP		 136 m = &s->runtime_metrics;
137 }
138
139 assert(m);
6e409ce1
LP		 140
141 p = strappend(f, sd_id128_to_string(machine, ids));
142 if (!p)
143 return 0;
144
145 d = opendir(p);
146 free(p);
147
148 if (!d)
149 return 0;
150
151 if (fstatvfs(dirfd(d), &ss) < 0)
152 goto finish;
153
154 for (;;) {
155 struct stat st;
156 struct dirent buf, *de;
157 int k;
158
159 k = readdir_r(d, &buf, &de);
160 if (k != 0) {
161 r = -k;
162 goto finish;
163 }
164
165 if (!de)
166 break;
167
168 if (!dirent_is_file_with_suffix(de, ".journal"))
169 continue;
170
171 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
172 continue;
173
174 sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
175 }
176
babfc091 177 avail = sum >= m->max_use ? 0 : m->max_use - sum;
6e409ce1
LP		 178
179 ss_avail = ss.f_bsize * ss.f_bavail;
180
babfc091 181 ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free;
6e409ce1
LP		 182
183 if (ss_avail < avail)
184 avail = ss_avail;
185
9cfb57c9
LP		 186 s->cached_available_space = avail;
187 s->cached_available_space_timestamp = ts;
188
6e409ce1
LP		 189finish:
190 closedir(d);
191
192 return avail;
193}
194
5e41cfec
LP		 195static void server_read_file_gid(Server *s) {
196 const char *adm = "adm";
197 int r;
198
199 assert(s);
200
201 if (s->file_gid_valid)
202 return;
203
204 r = get_group_creds(&adm, &s->file_gid);
205 if (r < 0)
206 log_warning("Failed to resolve 'adm' group: %s", strerror(-r));
207
208 /* if we couldn't read the gid, then it will be 0, but that's
209 * fine and we shouldn't try to resolve the group again, so
210 * let's just pretend it worked right-away. */
211 s->file_gid_valid = true;
212}
213
214static void server_fix_perms(Server *s, JournalFile *f, uid_t uid) {
e6520a0f
LP		 215 int r;
216#ifdef HAVE_ACL
f4b47811
LP		 217 acl_t acl;
218 acl_entry_t entry;
219 acl_permset_t permset;
e6520a0f 220#endif
f4b47811
LP		 221
222 assert(f);
223
5e41cfec
LP		 224 server_read_file_gid(s);
225
226 r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid);
f4b47811
LP		 227 if (r < 0)
228 log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
229
e6520a0f 230#ifdef HAVE_ACL
f4b47811
LP		 231 if (uid <= 0)
232 return;
233
234 acl = acl_get_fd(f->fd);
235 if (!acl) {
236 log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
237 return;
238 }
239
240 r = acl_find_uid(acl, uid, &entry);
241 if (r <= 0) {
242
243 if (acl_create_entry(&acl, &entry) < 0 ||
244 acl_set_tag_type(entry, ACL_USER) < 0 ||
245 acl_set_qualifier(entry, &uid) < 0) {
246 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
247 goto finish;
248 }
249 }
250
251 if (acl_get_permset(entry, &permset) < 0 ||
252 acl_add_perm(permset, ACL_READ) < 0 ||
253 acl_calc_mask(&acl) < 0) {
254 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
255 goto finish;
256 }
257
258 if (acl_set_fd(f->fd, acl) < 0)
259 log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
260
261finish:
262 acl_free(acl);
e6520a0f 263#endif
f4b47811
LP		 264}
265
266static JournalFile* find_journal(Server *s, uid_t uid) {
267 char *p;
268 int r;
269 JournalFile *f;
3fbf9cbb
LP		 270 char ids[33];
271 sd_id128_t machine;
f4b47811
LP		 272
273 assert(s);
274
cf244689
LP		 275 /* We split up user logs only on /var, not on /run. If the
276 * runtime file is open, we write to it exclusively, in order
277 * to guarantee proper order as soon as we flush /run to
278 * /var and close the runtime file. */
279
280 if (s->runtime_journal)
f4b47811
LP		 281 return s->runtime_journal;
282
283 if (uid <= 0)
284 return s->system_journal;
285
3fbf9cbb
LP		 286 r = sd_id128_get_machine(&machine);
287 if (r < 0)
288 return s->system_journal;
289
f4b47811
LP		 290 f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
291 if (f)
292 return f;
293
3fbf9cbb 294 if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0)
f4b47811
LP		 295 return s->system_journal;
296
cab8ac60
LP		 297 while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
298 /* Too many open? Then let's close one */
299 f = hashmap_steal_first(s->user_journals);
300 assert(f);
301 journal_file_close(f);
302 }
303
c2373f84 304 r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
f4b47811
LP		 305 free(p);
306
307 if (r < 0)
308 return s->system_journal;
309
5e41cfec 310 server_fix_perms(s, f, uid);
babfc091 311 f->metrics = s->system_metrics;
807e17f0 312 f->compress = s->compress;
f4b47811
LP		 313
314 r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
315 if (r < 0) {
316 journal_file_close(f);
317 return s->system_journal;
318 }
319
320 return f;
321}
322
b1a0ab71
LP		 323static void server_rotate(Server *s) {
324 JournalFile *f;
bc85bfee 325 void *k;
b1a0ab71 326 Iterator i;
bc85bfee 327 int r;
bc85bfee
LP		 328
329 log_info("Rotating...");
330
331 if (s->runtime_journal) {
332 r = journal_file_rotate(&s->runtime_journal);
333 if (r < 0)
334 log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
335 }
336
337 if (s->system_journal) {
338 r = journal_file_rotate(&s->system_journal);
339 if (r < 0)
340 log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
341 }
342
343 HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
344 r = journal_file_rotate(&f);
345 if (r < 0)
346 log_error("Failed to rotate %s: %s", f->path, strerror(-r));
347 else
348 hashmap_replace(s->user_journals, k, f);
349 }
b1a0ab71
LP		 350}
351
352static void server_vacuum(Server *s) {
353 char *p;
354 char ids[33];
355 sd_id128_t machine;
356 int r;
bc85bfee
LP		 357
358 log_info("Vacuuming...");
359
360 r = sd_id128_get_machine(&machine);
361 if (r < 0) {
362 log_error("Failed to get machine ID: %s", strerror(-r));
363 return;
364 }
365
babfc091 366 sd_id128_to_string(machine, ids);
bc85bfee 367
babfc091
LP		 368 if (s->system_journal) {
369 if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
370 log_error("Out of memory.");
371 return;
372 }
bc85bfee 373
babfc091
LP		 374 r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free);
375 if (r < 0 && r != -ENOENT)
376 log_error("Failed to vacuum %s: %s", p, strerror(-r));
377 free(p);
bc85bfee
LP		 378 }
379
babfc091
LP		 380
381 if (s->runtime_journal) {
382 if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
383 log_error("Out of memory.");
384 return;
385 }
386
387 r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free);
388 if (r < 0 && r != -ENOENT)
389 log_error("Failed to vacuum %s: %s", p, strerror(-r));
390 free(p);
391 }
9cfb57c9
LP		 392
393 s->cached_available_space_timestamp = 0;
bc85bfee
LP		 394}
395
6e409ce1
LP		 396static char *shortened_cgroup_path(pid_t pid) {
397 int r;
398 char *process_path, *init_path, *path;
399
400 assert(pid > 0);
401
402 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path);
403 if (r < 0)
404 return NULL;
405
406 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path);
407 if (r < 0) {
408 free(process_path);
409 return NULL;
410 }
411
bad75c27
LP		 412 if (endswith(init_path, "/system"))
413 init_path[strlen(init_path) - 7] = 0;
414 else if (streq(init_path, "/"))
6e409ce1
LP		 415 init_path[0] = 0;
416
783d2675
LP		 417 if (startswith(process_path, init_path)) {
418 char *p;
419
420 p = strdup(process_path + strlen(init_path));
421 if (!p) {
422 free(process_path);
423 free(init_path);
424 return NULL;
425 }
426 path = p;
427 } else {
6e409ce1 428 path = process_path;
783d2675
LP		 429 process_path = NULL;
430 }
6e409ce1 431
783d2675 432 free(process_path);
6e409ce1
LP		 433 free(init_path);
434
435 return path;
436}
437
7f2c63cb
LP		 438static void dispatch_message_real(
439 Server *s,
440 struct iovec *iovec, unsigned n, unsigned m,
441 struct ucred *ucred,
442 struct timeval *tv,
443 const char *label, size_t label_len) {
6e409ce1 444
7f3e6257 445 char *pid = NULL, *uid = NULL, *gid = NULL,
87d2c1ff
LP		 446 *source_time = NULL, *boot_id = NULL, *machine_id = NULL,
447 *comm = NULL, *cmdline = NULL, *hostname = NULL,
448 *audit_session = NULL, *audit_loginuid = NULL,
85d83bf4 449 *exe = NULL, *cgroup = NULL, *session = NULL,
8a0f04e6 450 *owner_uid = NULL, *unit = NULL, *selinux_context = NULL;
7f3e6257 451
87d2c1ff
LP		 452 char idbuf[33];
453 sd_id128_t id;
454 int r;
455 char *t;
de190aef 456 uid_t loginuid = 0, realuid = 0;
f4b47811 457 JournalFile *f;
bc85bfee 458 bool vacuumed = false;
87d2c1ff 459
7f3e6257 460 assert(s);
6e409ce1
LP		 461 assert(iovec);
462 assert(n > 0);
224f2ee2 463 assert(n + N_IOVEC_META_FIELDS <= m);
87d2c1ff
LP		 464
465 if (ucred) {
85d83bf4
LP		 466 uint32_t audit;
467 uid_t owner;
87d2c1ff 468
de190aef
LP		 469 realuid = ucred->uid;
470
471 if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
87d2c1ff
LP		 472 IOVEC_SET_STRING(iovec[n++], pid);
473
de190aef 474 if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
87d2c1ff
LP		 475 IOVEC_SET_STRING(iovec[n++], uid);
476
de190aef 477 if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
87d2c1ff
LP		 478 IOVEC_SET_STRING(iovec[n++], gid);
479
480 r = get_process_comm(ucred->pid, &t);
481 if (r >= 0) {
de190aef 482 comm = strappend("_COMM=", t);
85d83bf4
LP		 483 free(t);
484
87d2c1ff
LP		 485 if (comm)
486 IOVEC_SET_STRING(iovec[n++], comm);
87d2c1ff
LP		 487 }
488
489 r = get_process_exe(ucred->pid, &t);
490 if (r >= 0) {
de190aef 491 exe = strappend("_EXE=", t);
85d83bf4
LP		 492 free(t);
493
5c3759bf 494 if (exe)
87d2c1ff 495 IOVEC_SET_STRING(iovec[n++], exe);
87d2c1ff
LP		 496 }
497
498 r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
499 if (r >= 0) {
de190aef 500 cmdline = strappend("_CMDLINE=", t);
85d83bf4
LP		 501 free(t);
502
87d2c1ff
LP		 503 if (cmdline)
504 IOVEC_SET_STRING(iovec[n++], cmdline);
87d2c1ff
LP		 505 }
506
85d83bf4 507 r = audit_session_from_pid(ucred->pid, &audit);
87d2c1ff 508 if (r >= 0)
85d83bf4 509 if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0)
87d2c1ff
LP		 510 IOVEC_SET_STRING(iovec[n++], audit_session);
511
512 r = audit_loginuid_from_pid(ucred->pid, &loginuid);
513 if (r >= 0)
de190aef 514 if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
87d2c1ff 515 IOVEC_SET_STRING(iovec[n++], audit_loginuid);
69e5d42d 516
85d83bf4
LP		 517 t = shortened_cgroup_path(ucred->pid);
518 if (t) {
519 cgroup = strappend("_SYSTEMD_CGROUP=", t);
520 free(t);
521
69e5d42d
LP		 522 if (cgroup)
523 IOVEC_SET_STRING(iovec[n++], cgroup);
85d83bf4
LP		 524 }
525
526 if (sd_pid_get_session(ucred->pid, &t) >= 0) {
527 session = strappend("_SYSTEMD_SESSION=", t);
528 free(t);
529
530 if (session)
531 IOVEC_SET_STRING(iovec[n++], session);
532 }
6e409ce1 533
94fb446e
LP		 534 if (sd_pid_get_unit(ucred->pid, &t) >= 0) {
535 unit = strappend("_SYSTEMD_UNIT=", t);
85d83bf4
LP		 536 free(t);
537
94fb446e
LP		 538 if (unit)
539 IOVEC_SET_STRING(iovec[n++], unit);
69e5d42d 540 }
85d83bf4
LP		 541
542 if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0)
543 if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0)
544 IOVEC_SET_STRING(iovec[n++], owner_uid);
8a0f04e6
LP		 545
546#ifdef HAVE_SELINUX
7f2c63cb
LP		 547 if (label) {
548 selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len);
549 if (selinux_context) {
550 memcpy(selinux_context, "_SELINUX_CONTEXT=", sizeof("_SELINUX_CONTEXT=")-1);
551 memcpy(selinux_context+sizeof("_SELINUX_CONTEXT=")-1, label, label_len);
552 selinux_context[sizeof("_SELINUX_CONTEXT=")-1+label_len] = 0;
8a0f04e6 553 IOVEC_SET_STRING(iovec[n++], selinux_context);
7f2c63cb
LP		 554 }
555 } else {
556 security_context_t con;
557
558 if (getpidcon(ucred->pid, &con) >= 0) {
559 selinux_context = strappend("_SELINUX_CONTEXT=", con);
560 if (selinux_context)
561 IOVEC_SET_STRING(iovec[n++], selinux_context);
8a0f04e6 562
7f2c63cb
LP		 563 freecon(con);
564 }
8a0f04e6
LP		 565 }
566#endif
87d2c1ff
LP		 567 }
568
569 if (tv) {
de190aef 570 if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
87d2c1ff
LP		 571 (unsigned long long) timeval_load(tv)) >= 0)
572 IOVEC_SET_STRING(iovec[n++], source_time);
573 }
574
ed49ef3f
LP		 575 /* Note that strictly speaking storing the boot id here is
576 * redundant since the entry includes this in-line
577 * anyway. However, we need this indexed, too. */
87d2c1ff
LP		 578 r = sd_id128_get_boot(&id);
579 if (r >= 0)
de190aef 580 if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
87d2c1ff
LP		 581 IOVEC_SET_STRING(iovec[n++], boot_id);
582
583 r = sd_id128_get_machine(&id);
584 if (r >= 0)
de190aef 585 if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
87d2c1ff
LP		 586 IOVEC_SET_STRING(iovec[n++], machine_id);
587
588 t = gethostname_malloc();
589 if (t) {
de190aef 590 hostname = strappend("_HOSTNAME=", t);
85d83bf4 591 free(t);
87d2c1ff
LP		 592 if (hostname)
593 IOVEC_SET_STRING(iovec[n++], hostname);
87d2c1ff
LP		 594 }
595
7f3e6257
LP		 596 assert(n <= m);
597
cf244689
LP		 598 server_flush_to_var(s);
599
bc85bfee 600retry:
de190aef 601 f = find_journal(s, realuid == 0 ? 0 : loginuid);
f4b47811
LP		 602 if (!f)
603 log_warning("Dropping message, as we can't find a place to store the data.");
604 else {
c2373f84 605 r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
87d2c1ff 606
bc85bfee
LP		 607 if (r == -E2BIG && !vacuumed) {
608 log_info("Allocation limit reached.");
609
b1a0ab71 610 server_rotate(s);
bc85bfee
LP		 611 server_vacuum(s);
612 vacuumed = true;
613
614 log_info("Retrying write.");
615 goto retry;
616 }
617
f4b47811
LP		 618 if (r < 0)
619 log_error("Failed to write entry, ignoring: %s", strerror(-r));
620 }
87d2c1ff 621
87d2c1ff
LP		 622 free(pid);
623 free(uid);
624 free(gid);
625 free(comm);
69e5d42d 626 free(exe);
87d2c1ff
LP		 627 free(cmdline);
628 free(source_time);
629 free(boot_id);
630 free(machine_id);
631 free(hostname);
632 free(audit_session);
633 free(audit_loginuid);
7f3e6257 634 free(cgroup);
85d83bf4
LP		 635 free(session);
636 free(owner_uid);
94fb446e 637 free(unit);
8a0f04e6 638 free(selinux_context);
7f3e6257
LP		 639}
640
224f2ee2
LP		 641static void driver_message(Server *s, sd_id128_t message_id, const char *format, ...) {
642 char mid[11 + 32 + 1];
643 char buffer[16 + LINE_MAX + 1];
33eb8abf 644 struct iovec iovec[N_IOVEC_META_FIELDS + 4];
224f2ee2
LP		 645 int n = 0;
646 va_list ap;
647 struct ucred ucred;
648
649 assert(s);
650 assert(format);
651
652 IOVEC_SET_STRING(iovec[n++], "PRIORITY=5");
33eb8abf 653 IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver");
224f2ee2
LP		 654
655 memcpy(buffer, "MESSAGE=", 8);
656 va_start(ap, format);
657 vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap);
658 va_end(ap);
659 char_array_0(buffer);
660 IOVEC_SET_STRING(iovec[n++], buffer);
661
662 snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id));
663 char_array_0(mid);
664 IOVEC_SET_STRING(iovec[n++], mid);
665
666 zero(ucred);
667 ucred.pid = getpid();
668 ucred.uid = getuid();
669 ucred.gid = getgid();
670
7f2c63cb 671 dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0);
224f2ee2
LP		 672}
673
6e409ce1
LP		 674static void dispatch_message(Server *s,
675 struct iovec *iovec, unsigned n, unsigned m,
676 struct ucred *ucred,
677 struct timeval *tv,
7f2c63cb 678 const char *label, size_t label_len,
6e409ce1
LP		 679 int priority) {
680 int rl;
783d2675 681 char *path = NULL, *c;
6e409ce1
LP		 682
683 assert(s);
684 assert(iovec || n == 0);
685
686 if (n == 0)
687 return;
688
689 if (!ucred)
690 goto finish;
691
692 path = shortened_cgroup_path(ucred->pid);
693 if (!path)
694 goto finish;
695
696 /* example: /user/lennart/3/foobar
697 * /system/dbus.service/foobar
698 *
699 * So let's cut of everything past the third /, since that is
700 * wher user directories start */
701
702 c = strchr(path, '/');
703 if (c) {
704 c = strchr(c+1, '/');
705 if (c) {
706 c = strchr(c+1, '/');
707 if (c)
708 *c = 0;
709 }
710 }
711
224f2ee2 712 rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available_space(s));
6e409ce1
LP		 713
714 if (rl == 0) {
715 free(path);
716 return;
717 }
718
224f2ee2
LP		 719 /* Write a suppression message if we suppressed something */
720 if (rl > 1)
721 driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path);
722
723 free(path);
724
725finish:
7f2c63cb 726 dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len);
224f2ee2
LP		 727}
728
729static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, struct ucred *ucred, struct timeval *tv) {
730 struct msghdr msghdr;
731 struct cmsghdr *cmsg;
732 union {
733 struct cmsghdr cmsghdr;
734 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
735 } control;
736 union sockaddr_union sa;
737
738 assert(s);
739 assert(iovec);
740 assert(n_iovec > 0);
741
742 zero(msghdr);
743 msghdr.msg_iov = (struct iovec*) iovec;
744 msghdr.msg_iovlen = n_iovec;
745
746 zero(sa);
747 sa.un.sun_family = AF_UNIX;
259d2e76 748 strncpy(sa.un.sun_path, "/run/systemd/journal/syslog", sizeof(sa.un.sun_path));
224f2ee2
LP		 749 msghdr.msg_name = &sa;
750 msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
751
752 if (ucred) {
753 zero(control);
754 msghdr.msg_control = &control;
755 msghdr.msg_controllen = sizeof(control);
756
757 cmsg = CMSG_FIRSTHDR(&msghdr);
758 cmsg->cmsg_level = SOL_SOCKET;
759 cmsg->cmsg_type = SCM_CREDENTIALS;
760 cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
761 memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
762 msghdr.msg_controllen = cmsg->cmsg_len;
763 }
764
765 /* Forward the syslog message we received via /dev/log to
766 * /run/systemd/syslog. Unfortunately we currently can't set
767 * the SO_TIMESTAMP auxiliary data, and hence we don't. */
6e409ce1 768
224f2ee2
LP		 769 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
770 return;
6e409ce1 771
7c8bbccd
LP		 772 /* The socket is full? I guess the syslog implementation is
773 * too slow, and we shouldn't wait for that... */
774 if (errno == EAGAIN)
775 return;
776
224f2ee2
LP		 777 if (ucred && errno == ESRCH) {
778 struct ucred u;
6e409ce1 779
224f2ee2
LP		 780 /* Hmm, presumably the sender process vanished
781 * by now, so let's fix it as good as we
782 * can, and retry */
6e409ce1 783
224f2ee2
LP		 784 u = *ucred;
785 u.pid = getpid();
786 memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
787
788 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
789 return;
7c8bbccd
LP		 790
791 if (errno == EAGAIN)
792 return;
6e409ce1
LP		 793 }
794
224f2ee2
LP		 795 log_debug("Failed to forward syslog message: %m");
796}
797
798static void forward_syslog_raw(Server *s, const char *buffer, struct ucred *ucred, struct timeval *tv) {
799 struct iovec iovec;
800
801 assert(s);
802 assert(buffer);
803
804 IOVEC_SET_STRING(iovec, buffer);
805 forward_syslog_iovec(s, &iovec, 1, ucred, tv);
806}
807
4cd9a9d9 808static void forward_syslog(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred, struct timeval *tv) {
224f2ee2
LP		 809 struct iovec iovec[5];
810 char header_priority[6], header_time[64], header_pid[16];
811 int n = 0;
812 time_t t;
813 struct tm *tm;
4cd9a9d9 814 char *ident_buf = NULL;
224f2ee2
LP		 815
816 assert(s);
817 assert(priority >= 0);
818 assert(priority <= 999);
819 assert(message);
820
821 /* First: priority field */
822 snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
823 char_array_0(header_priority);
824 IOVEC_SET_STRING(iovec[n++], header_priority);
825
826 /* Second: timestamp */
827 t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC));
828 tm = localtime(&t);
829 if (!tm)
830 return;
831 if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
832 return;
833 IOVEC_SET_STRING(iovec[n++], header_time);
834
4cd9a9d9 835 /* Third: identifier and PID */
224f2ee2 836 if (ucred) {
4cd9a9d9
LP		 837 if (!identifier) {
838 get_process_comm(ucred->pid, &ident_buf);
839 identifier = ident_buf;
224f2ee2
LP		 840 }
841
842 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
843 char_array_0(header_pid);
844
4cd9a9d9
LP		 845 if (identifier)
846 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 847
848 IOVEC_SET_STRING(iovec[n++], header_pid);
4cd9a9d9
LP		 849 } else if (identifier) {
850 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 851 IOVEC_SET_STRING(iovec[n++], ": ");
852 }
853
854 /* Fourth: message */
855 IOVEC_SET_STRING(iovec[n++], message);
856
857 forward_syslog_iovec(s, iovec, n, ucred, tv);
858
4cd9a9d9 859 free(ident_buf);
224f2ee2
LP		 860}
861
862static int fixup_priority(int priority) {
863
864 if ((priority & LOG_FACMASK) == 0)
865 return (priority & LOG_PRIMASK) | LOG_USER;
866
867 return priority;
868}
869
4cd9a9d9 870static void forward_kmsg(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) {
224f2ee2
LP		 871 struct iovec iovec[5];
872 char header_priority[6], header_pid[16];
873 int n = 0;
4cd9a9d9 874 char *ident_buf = NULL;
224f2ee2
LP		 875 int fd;
876
877 assert(s);
878 assert(priority >= 0);
879 assert(priority <= 999);
880 assert(message);
881
882 /* Never allow messages with kernel facility to be written to
883 * kmsg, regardless where the data comes from. */
884 priority = fixup_priority(priority);
885
886 /* First: priority field */
887 snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
888 char_array_0(header_priority);
889 IOVEC_SET_STRING(iovec[n++], header_priority);
890
4cd9a9d9 891 /* Second: identifier and PID */
224f2ee2 892 if (ucred) {
4cd9a9d9
LP		 893 if (!identifier) {
894 get_process_comm(ucred->pid, &ident_buf);
895 identifier = ident_buf;
224f2ee2
LP		 896 }
897
898 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
899 char_array_0(header_pid);
900
4cd9a9d9
LP		 901 if (identifier)
902 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 903
904 IOVEC_SET_STRING(iovec[n++], header_pid);
4cd9a9d9
LP		 905 } else if (identifier) {
906 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 907 IOVEC_SET_STRING(iovec[n++], ": ");
908 }
909
910 /* Fourth: message */
911 IOVEC_SET_STRING(iovec[n++], message);
912 IOVEC_SET_STRING(iovec[n++], "\n");
913
914 fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
915 if (fd < 0) {
916 log_debug("Failed to open /dev/kmsg for logging: %s", strerror(errno));
917 goto finish;
918 }
919
920 if (writev(fd, iovec, n) < 0)
921 log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
922
923 close_nointr_nofail(fd);
6e409ce1
LP		 924
925finish:
4cd9a9d9 926 free(ident_buf);
224f2ee2
LP		 927}
928
4cd9a9d9 929static void forward_console(Server *s, const char *identifier, const char *message, struct ucred *ucred) {
224f2ee2
LP		 930 struct iovec iovec[4];
931 char header_pid[16];
932 int n = 0, fd;
4cd9a9d9 933 char *ident_buf = NULL;
224f2ee2
LP		 934
935 assert(s);
936 assert(message);
937
4cd9a9d9 938 /* First: identifier and PID */
224f2ee2 939 if (ucred) {
4cd9a9d9
LP		 940 if (!identifier) {
941 get_process_comm(ucred->pid, &ident_buf);
942 identifier = ident_buf;
224f2ee2
LP		 943 }
944
945 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
946 char_array_0(header_pid);
947
4cd9a9d9
LP		 948 if (identifier)
949 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 950
951 IOVEC_SET_STRING(iovec[n++], header_pid);
4cd9a9d9
LP		 952 } else if (identifier) {
953 IOVEC_SET_STRING(iovec[n++], identifier);
224f2ee2
LP		 954 IOVEC_SET_STRING(iovec[n++], ": ");
955 }
956
957 /* Third: message */
958 IOVEC_SET_STRING(iovec[n++], message);
959 IOVEC_SET_STRING(iovec[n++], "\n");
960
961 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
962 if (fd < 0) {
963 log_debug("Failed to open /dev/console for logging: %s", strerror(errno));
964 goto finish;
965 }
966
967 if (writev(fd, iovec, n) < 0)
968 log_debug("Failed to write to /dev/console for logging: %s", strerror(errno));
969
970 close_nointr_nofail(fd);
971
972finish:
4cd9a9d9 973 free(ident_buf);
224f2ee2
LP		 974}
975
6c1e6b98 976static void read_identifier(const char **buf, char **identifier, char **pid) {
224f2ee2
LP		 977 const char *p;
978 char *t;
979 size_t l, e;
980
981 assert(buf);
4cd9a9d9 982 assert(identifier);
6c1e6b98 983 assert(pid);
224f2ee2
LP		 984
985 p = *buf;
986
987 p += strspn(p, WHITESPACE);
988 l = strcspn(p, WHITESPACE);
989
990 if (l <= 0 ||
991 p[l-1] != ':')
992 return;
993
994 e = l;
995 l--;
996
997 if (p[l-1] == ']') {
998 size_t k = l-1;
999
1000 for (;;) {
1001
1002 if (p[k] == '[') {
6c1e6b98
LP		 1003 t = strndup(p+k+1, l-k-2);
1004 if (t)
1005 *pid = t;
1006
224f2ee2
LP		 1007 l = k;
1008 break;
1009 }
1010
1011 if (k == 0)
1012 break;
1013
1014 k--;
1015 }
1016 }
1017
1018 t = strndup(p, l);
1019 if (t)
4cd9a9d9 1020 *identifier = t;
224f2ee2
LP		 1021
1022 *buf = p + e;
1023 *buf += strspn(*buf, WHITESPACE);
6e409ce1
LP		 1024}
1025
7f2c63cb 1026static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv, const char *label, size_t label_len) {
6c1e6b98
LP		 1027 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *syslog_pid = NULL;
1028 struct iovec iovec[N_IOVEC_META_FIELDS + 6];
7f3e6257
LP		 1029 unsigned n = 0;
1030 int priority = LOG_USER | LOG_INFO;
6c1e6b98 1031 char *identifier = NULL, *pid = NULL;
7f3e6257
LP		 1032
1033 assert(s);
1034 assert(buf);
1035
224f2ee2
LP		 1036 if (s->forward_to_syslog)
1037 forward_syslog_raw(s, buf, ucred, tv);
1038
7f3e6257
LP		 1039 parse_syslog_priority((char**) &buf, &priority);
1040 skip_syslog_date((char**) &buf);
6c1e6b98 1041 read_identifier(&buf, &identifier, &pid);
224f2ee2
LP		 1042
1043 if (s->forward_to_kmsg)
4cd9a9d9 1044 forward_kmsg(s, priority, identifier, buf, ucred);
224f2ee2
LP		 1045
1046 if (s->forward_to_console)
4cd9a9d9 1047 forward_console(s, identifier, buf, ucred);
7f3e6257 1048
33eb8abf
LP		 1049 IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog");
1050
7f3e6257
LP		 1051 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
1052 IOVEC_SET_STRING(iovec[n++], syslog_priority);
1053
224f2ee2
LP		 1054 if (priority & LOG_FACMASK)
1055 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
1056 IOVEC_SET_STRING(iovec[n++], syslog_facility);
1057
4cd9a9d9
LP		 1058 if (identifier) {
1059 syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
1060 if (syslog_identifier)
1061 IOVEC_SET_STRING(iovec[n++], syslog_identifier);
224f2ee2 1062 }
7f3e6257 1063
6c1e6b98
LP		 1064 if (pid) {
1065 syslog_pid = strappend("SYSLOG_PID=", pid);
1066 if (syslog_pid)
1067 IOVEC_SET_STRING(iovec[n++], syslog_pid);
1068 }
1069
7f3e6257
LP		 1070 message = strappend("MESSAGE=", buf);
1071 if (message)
1072 IOVEC_SET_STRING(iovec[n++], message);
1073
7f2c63cb 1074 dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, label, label_len, priority);
7f3e6257
LP		 1075
1076 free(message);
4cd9a9d9 1077 free(identifier);
6c1e6b98 1078 free(pid);
87d2c1ff 1079 free(syslog_priority);
224f2ee2 1080 free(syslog_facility);
4cd9a9d9 1081 free(syslog_identifier);
7f3e6257
LP		 1082}
1083
6ad1d1c3
LP		 1084static bool valid_user_field(const char *p, size_t l) {
1085 const char *a;
1086
1087 /* We kinda enforce POSIX syntax recommendations for
1088 environment variables here, but make a couple of additional
1089 requirements.
1090
1091 http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
1092
1093 /* No empty field names */
1094 if (l <= 0)
1095 return false;
1096
1097 /* Don't allow names longer than 64 chars */
1098 if (l > 64)
1099 return false;
1100
1101 /* Variables starting with an underscore are protected */
1102 if (p[0] == '_')
1103 return false;
1104
1105 /* Don't allow digits as first character */
1106 if (p[0] >= '0' && p[0] <= '9')
1107 return false;
1108
1109 /* Only allow A-Z0-9 and '_' */
1110 for (a = p; a < p + l; a++)
1111 if (!((*a >= 'A' && *a <= 'Z') ||
1112 (*a >= '0' && *a <= '9') ||
1113 *a == '_'))
1114 return false;
1115
1116 return true;
1117}
1118
7f2c63cb
LP		 1119static void process_native_message(
1120 Server *s,
1121 const void *buffer, size_t buffer_size,
1122 struct ucred *ucred,
1123 struct timeval *tv,
1124 const char *label, size_t label_len) {
1125
7f3e6257 1126 struct iovec *iovec = NULL;
33eb8abf 1127 unsigned n = 0, m = 0, j, tn = (unsigned) -1;
7f3e6257
LP		 1128 const char *p;
1129 size_t remaining;
6e409ce1 1130 int priority = LOG_INFO;
4cd9a9d9 1131 char *identifier = NULL, *message = NULL;
7f3e6257
LP		 1132
1133 assert(s);
1134 assert(buffer || n == 0);
1135
1136 p = buffer;
1137 remaining = buffer_size;
1138
1139 while (remaining > 0) {
1140 const char *e, *q;
1141
1142 e = memchr(p, '\n', remaining);
1143
1144 if (!e) {
1145 /* Trailing noise, let's ignore it, and flush what we collected */
1146 log_debug("Received message with trailing noise, ignoring.");
1147 break;
1148 }
1149
1150 if (e == p) {
1151 /* Entry separator */
7f2c63cb 1152 dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, priority);
7f3e6257 1153 n = 0;
6e409ce1 1154 priority = LOG_INFO;
7f3e6257
LP		 1155
1156 p++;
1157 remaining--;
1158 continue;
1159 }
1160
6ad1d1c3
LP		 1161 if (*p == '.' || *p == '#') {
1162 /* Ignore control commands for now, and
1163 * comments too. */
7f3e6257
LP		 1164 remaining -= (e - p) + 1;
1165 p = e + 1;
1166 continue;
1167 }
1168
1169 /* A property follows */
1170
224f2ee2 1171 if (n+N_IOVEC_META_FIELDS >= m) {
7f3e6257
LP		 1172 struct iovec *c;
1173 unsigned u;
1174
33eb8abf 1175 u = MAX((n+N_IOVEC_META_FIELDS+1) * 2U, 4U);
7f3e6257
LP		 1176 c = realloc(iovec, u * sizeof(struct iovec));
1177 if (!c) {
1178 log_error("Out of memory");
1179 break;
1180 }
1181
1182 iovec = c;
1183 m = u;
1184 }
1185
1186 q = memchr(p, '=', e - p);
1187 if (q) {
6ad1d1c3 1188 if (valid_user_field(p, q - p)) {
224f2ee2
LP		 1189 size_t l;
1190
1191 l = e - p;
1192
2b0ba69b
LP		 1193 /* If the field name starts with an
1194 * underscore, skip the variable,
1195 * since that indidates a trusted
1196 * field */
1197 iovec[n].iov_base = (char*) p;
224f2ee2 1198 iovec[n].iov_len = l;
2b0ba69b 1199 n++;
6e409ce1
LP		 1200
1201 /* We need to determine the priority
1202 * of this entry for the rate limiting
1203 * logic */
224f2ee2
LP		 1204 if (l == 10 &&
1205 memcmp(p, "PRIORITY=", 9) == 0 &&
1206 p[9] >= '0' && p[9] <= '9')
1207 priority = (priority & LOG_FACMASK) | (p[9] - '0');
1208
1209 else if (l == 17 &&
1210 memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
1211 p[16] >= '0' && p[16] <= '9')
1212 priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
1213
1214 else if (l == 18 &&
1215 memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
1216 p[16] >= '0' && p[16] <= '9' &&
1217 p[17] >= '0' && p[17] <= '9')
1218 priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
1219
1220 else if (l >= 12 &&
4cd9a9d9 1221 memcmp(p, "SYSLOG_IDENTIFIER=", 11) == 0) {
224f2ee2
LP		 1222 char *t;
1223
1224 t = strndup(p + 11, l - 11);
1225 if (t) {
4cd9a9d9
LP		 1226 free(identifier);
1227 identifier = t;
224f2ee2
LP		 1228 }
1229 } else if (l >= 8 &&
1230 memcmp(p, "MESSAGE=", 8) == 0) {
1231 char *t;
1232
1233 t = strndup(p + 8, l - 8);
1234 if (t) {
1235 free(message);
1236 message = t;
1237 }
1238 }
2b0ba69b 1239 }
7f3e6257
LP		 1240
1241 remaining -= (e - p) + 1;
1242 p = e + 1;
1243 continue;
1244 } else {
1245 uint64_t l;
1246 char *k;
1247
1248 if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
1249 log_debug("Failed to parse message, ignoring.");
1250 break;
1251 }
1252
1253 memcpy(&l, e + 1, sizeof(uint64_t));
1254 l = le64toh(l);
1255
1256 if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
1257 e[1+sizeof(uint64_t)+l] != '\n') {
1258 log_debug("Failed to parse message, ignoring.");
1259 break;
1260 }
1261
1262 k = malloc((e - p) + 1 + l);
1263 if (!k) {
1264 log_error("Out of memory");
1265 break;
1266 }
1267
1268 memcpy(k, p, e - p);
1269 k[e - p] = '=';
1270 memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
1271
6ad1d1c3 1272 if (valid_user_field(p, e - p)) {
2b0ba69b
LP		 1273 iovec[n].iov_base = k;
1274 iovec[n].iov_len = (e - p) + 1 + l;
1275 n++;
1276 } else
1277 free(k);
7f3e6257
LP		 1278
1279 remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
1280 p = e + 1 + sizeof(uint64_t) + l + 1;
1281 }
1282 }
1283
33eb8abf
LP		 1284 if (n <= 0)
1285 goto finish;
1286
1287 tn = n++;
1288 IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
1289
224f2ee2
LP		 1290 if (message) {
1291 if (s->forward_to_syslog)
4cd9a9d9 1292 forward_syslog(s, priority, identifier, message, ucred, tv);
224f2ee2
LP		 1293
1294 if (s->forward_to_kmsg)
4cd9a9d9 1295 forward_kmsg(s, priority, identifier, message, ucred);
224f2ee2
LP		 1296
1297 if (s->forward_to_console)
4cd9a9d9 1298 forward_console(s, identifier, message, ucred);
224f2ee2
LP		 1299 }
1300
7f2c63cb 1301 dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, priority);
7f3e6257 1302
33eb8abf
LP		 1303finish:
1304 for (j = 0; j < n; j++) {
1305 if (j == tn)
1306 continue;
1307
7f3e6257
LP		 1308 if (iovec[j].iov_base < buffer ||
1309 (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
1310 free(iovec[j].iov_base);
33eb8abf 1311 }
224f2ee2 1312
4cd9a9d9 1313 free(identifier);
224f2ee2 1314 free(message);
87d2c1ff
LP		 1315}
1316
7f2c63cb
LP		 1317static void process_native_file(
1318 Server *s,
1319 int fd,
1320 struct ucred *ucred,
1321 struct timeval *tv,
1322 const char *label, size_t label_len) {
1323
0dad12c1
LP		 1324 struct stat st;
1325 void *p;
1326 ssize_t n;
1327
1328 assert(s);
1329 assert(fd >= 0);
1330
1331 /* Data is in the passed file, since it didn't fit in a
1332 * datagram. We can't map the file here, since clients might
1333 * then truncate it and trigger a SIGBUS for us. So let's
1334 * stupidly read it */
1335
1336 if (fstat(fd, &st) < 0) {
1337 log_error("Failed to stat passed file, ignoring: %m");
1338 return;
1339 }
1340
1341 if (!S_ISREG(st.st_mode)) {
1342 log_error("File passed is not regular. Ignoring.");
1343 return;
1344 }
1345
1346 if (st.st_size <= 0)
1347 return;
1348
1349 if (st.st_size > ENTRY_SIZE_MAX) {
1350 log_error("File passed too large. Ignoring.");
1351 return;
1352 }
1353
1354 p = malloc(st.st_size);
1355 if (!p) {
1356 log_error("Out of memory");
1357 return;
1358 }
1359
1360 n = pread(fd, p, st.st_size, 0);
1361 if (n < 0)
1362 log_error("Failed to read file, ignoring: %s", strerror(-n));
1363 else if (n > 0)
7f2c63cb 1364 process_native_message(s, p, n, ucred, tv, label, label_len);
0dad12c1
LP		 1365
1366 free(p);
1367}
1368
224f2ee2 1369static int stdout_stream_log(StdoutStream *s, const char *p) {
33eb8abf 1370 struct iovec iovec[N_IOVEC_META_FIELDS + 5];
4cd9a9d9 1371 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
fe652127 1372 unsigned n = 0;
fe652127 1373 int priority;
7f2c63cb
LP		 1374 char *label = NULL;
1375 size_t label_len = 0;
fe652127 1376
87d2c1ff 1377 assert(s);
fe652127
LP		 1378 assert(p);
1379
0dad12c1
LP		 1380 if (isempty(p))
1381 return 0;
1382
fe652127
LP		 1383 priority = s->priority;
1384
258cdffc 1385 if (s->level_prefix)
224f2ee2 1386 parse_syslog_priority((char**) &p, &priority);
fe652127 1387
224f2ee2 1388 if (s->forward_to_syslog || s->server->forward_to_syslog)
4cd9a9d9 1389 forward_syslog(s->server, fixup_priority(priority), s->identifier, p, &s->ucred, NULL);
fe652127 1390
224f2ee2 1391 if (s->forward_to_kmsg || s->server->forward_to_kmsg)
4cd9a9d9 1392 forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
fe652127 1393
224f2ee2 1394 if (s->forward_to_console || s->server->forward_to_console)
4cd9a9d9 1395 forward_console(s->server, s->identifier, p, &s->ucred);
224f2ee2 1396
33eb8abf
LP		 1397 IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
1398
224f2ee2 1399 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
fe652127
LP		 1400 IOVEC_SET_STRING(iovec[n++], syslog_priority);
1401
224f2ee2
LP		 1402 if (priority & LOG_FACMASK)
1403 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
1404 IOVEC_SET_STRING(iovec[n++], syslog_facility);
fe652127 1405
4cd9a9d9
LP		 1406 if (s->identifier) {
1407 syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
1408 if (syslog_identifier)
1409 IOVEC_SET_STRING(iovec[n++], syslog_identifier);
87d2c1ff
LP		 1410 }
1411
224f2ee2
LP		 1412 message = strappend("MESSAGE=", p);
1413 if (message)
1414 IOVEC_SET_STRING(iovec[n++], message);
fe652127 1415
7f2c63cb
LP		 1416#ifdef HAVE_SELINUX
1417 if (s->security_context) {
1418 label = (char*) s->security_context;
1419 label_len = strlen((char*) s->security_context);
1420 }
1421#endif
1422
1423 dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, priority);
fe652127
LP		 1424
1425 free(message);
1426 free(syslog_priority);
224f2ee2 1427 free(syslog_facility);
4cd9a9d9 1428 free(syslog_identifier);
fe652127
LP		 1429
1430 return 0;
1431}
1432
224f2ee2
LP		 1433static int stdout_stream_line(StdoutStream *s, char *p) {
1434 int r;
1435
fe652127
LP		 1436 assert(s);
1437 assert(p);
1438
224f2ee2 1439 p = strstrip(p);
fe652127
LP		 1440
1441 switch (s->state) {
1442
4cd9a9d9 1443 case STDOUT_STREAM_IDENTIFIER:
4c7de074
LP		 1444 if (isempty(p))
1445 s->identifier = NULL;
1446 else {
1447 s->identifier = strdup(p);
1448 if (!s->identifier) {
1449 log_error("Out of memory");
1450 return -ENOMEM;
1451 }
fe652127
LP		 1452 }
1453
1454 s->state = STDOUT_STREAM_PRIORITY;
1455 return 0;
1456
1457 case STDOUT_STREAM_PRIORITY:
224f2ee2
LP		 1458 r = safe_atoi(p, &s->priority);
1459 if (r < 0 || s->priority <= 0 || s->priority >= 999) {
fe652127
LP		 1460 log_warning("Failed to parse log priority line.");
1461 return -EINVAL;
1462 }
1463
258cdffc 1464 s->state = STDOUT_STREAM_LEVEL_PREFIX;
fe652127
LP		 1465 return 0;
1466
258cdffc 1467 case STDOUT_STREAM_LEVEL_PREFIX:
224f2ee2
LP		 1468 r = parse_boolean(p);
1469 if (r < 0) {
258cdffc 1470 log_warning("Failed to parse level prefix line.");
fe652127
LP		 1471 return -EINVAL;
1472 }
1473
258cdffc 1474 s->level_prefix = !!r;
224f2ee2 1475 s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
fe652127
LP		 1476 return 0;
1477
224f2ee2
LP		 1478 case STDOUT_STREAM_FORWARD_TO_SYSLOG:
1479 r = parse_boolean(p);
1480 if (r < 0) {
1481 log_warning("Failed to parse forward to syslog line.");
fe652127
LP		 1482 return -EINVAL;
1483 }
1484
224f2ee2
LP		 1485 s->forward_to_syslog = !!r;
1486 s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
1487 return 0;
1488
1489 case STDOUT_STREAM_FORWARD_TO_KMSG:
1490 r = parse_boolean(p);
1491 if (r < 0) {
1492 log_warning("Failed to parse copy to kmsg line.");
1493 return -EINVAL;
1494 }
1495
1496 s->forward_to_kmsg = !!r;
1497 s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
1498 return 0;
1499
1500 case STDOUT_STREAM_FORWARD_TO_CONSOLE:
1501 r = parse_boolean(p);
1502 if (r < 0) {
1503 log_warning("Failed to parse copy to console line.");
1504 return -EINVAL;
1505 }
1506
1507 s->forward_to_console = !!r;
fe652127
LP		 1508 s->state = STDOUT_STREAM_RUNNING;
1509 return 0;
1510
1511 case STDOUT_STREAM_RUNNING:
224f2ee2 1512 return stdout_stream_log(s, p);
fe652127
LP		 1513 }
1514
1515 assert_not_reached("Unknown stream state");
1516}
1517
1518static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
1519 char *p;
1520 size_t remaining;
1521 int r;
1522
1523 assert(s);
1524
1525 p = s->buffer;
1526 remaining = s->length;
1527 for (;;) {
1528 char *end;
1529 size_t skip;
1530
1531 end = memchr(p, '\n', remaining);
224f2ee2 1532 if (end)
fe652127 1533 skip = end - p + 1;
224f2ee2
LP		 1534 else if (remaining >= sizeof(s->buffer) - 1) {
1535 end = p + sizeof(s->buffer) - 1;
6c1e6b98 1536 skip = remaining;
224f2ee2
LP		 1537 } else
1538 break;
1539
1540 *end = 0;
fe652127 1541
224f2ee2 1542 r = stdout_stream_line(s, p);
fe652127
LP		 1543 if (r < 0)
1544 return r;
1545
1546 remaining -= skip;
1547 p += skip;
1548 }
1549
1550 if (force_flush && remaining > 0) {
224f2ee2
LP		 1551 p[remaining] = 0;
1552 r = stdout_stream_line(s, p);
fe652127
LP		 1553 if (r < 0)
1554 return r;
1555
1556 p += remaining;
1557 remaining = 0;
1558 }
1559
1560 if (p > s->buffer) {
1561 memmove(s->buffer, p, remaining);
1562 s->length = remaining;
1563 }
1564
1565 return 0;
1566}
1567
1568static int stdout_stream_process(StdoutStream *s) {
1569 ssize_t l;
1570 int r;
1571
1572 assert(s);
1573
1574 l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
1575 if (l < 0) {
1576
1577 if (errno == EAGAIN)
1578 return 0;
1579
1580 log_warning("Failed to read from stream: %m");
1581 return -errno;
1582 }
1583
1584 if (l == 0) {
1585 r = stdout_stream_scan(s, true);
1586 if (r < 0)
1587 return r;
1588
1589 return 0;
1590 }
1591
1592 s->length += l;
1593 r = stdout_stream_scan(s, false);
1594 if (r < 0)
1595 return r;
1596
1597 return 1;
1598
1599}
1600
1601static void stdout_stream_free(StdoutStream *s) {
1602 assert(s);
1603
1604 if (s->server) {
1605 assert(s->server->n_stdout_streams > 0);
1606 s->server->n_stdout_streams --;
1607 LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
1608 }
1609
1610 if (s->fd >= 0) {
1611 if (s->server)
1612 epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
1613
1614 close_nointr_nofail(s->fd);
1615 }
1616
7f2c63cb
LP		 1617#ifdef HAVE_SELINUX
1618 if (s->security_context)
1619 freecon(s->security_context);
1620#endif
1621
4cd9a9d9 1622 free(s->identifier);
fe652127
LP		 1623 free(s);
1624}
1625
1626static int stdout_stream_new(Server *s) {
1627 StdoutStream *stream;
1628 int fd, r;
1629 socklen_t len;
1630 struct epoll_event ev;
1631
1632 assert(s);
1633
1634 fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
1635 if (fd < 0) {
1636 if (errno == EAGAIN)
1637 return 0;
1638
1639 log_error("Failed to accept stdout connection: %m");
1640 return -errno;
1641 }
1642
1643 if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
1644 log_warning("Too many stdout streams, refusing connection.");
1645 close_nointr_nofail(fd);
1646 return 0;
1647 }
1648
1649 stream = new0(StdoutStream, 1);
1650 if (!stream) {
1651 log_error("Out of memory.");
1652 close_nointr_nofail(fd);
1653 return -ENOMEM;
1654 }
1655
1656 stream->fd = fd;
1657
1658 len = sizeof(stream->ucred);
1659 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
1660 log_error("Failed to determine peer credentials: %m");
1661 r = -errno;
1662 goto fail;
1663 }
1664
7f2c63cb
LP		 1665#ifdef HAVE_SELINUX
1666 if (getpeercon(fd, &stream->security_context) < 0)
1667 log_error("Failed to determine peer security context.");
1668#endif
1669
fe652127
LP		 1670 if (shutdown(fd, SHUT_WR) < 0) {
1671 log_error("Failed to shutdown writing side of socket: %m");
1672 r = -errno;
1673 goto fail;
1674 }
1675
1676 zero(ev);
1677 ev.data.ptr = stream;
1678 ev.events = EPOLLIN;
1679 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
1680 log_error("Failed to add stream to event loop: %m");
1681 r = -errno;
1682 goto fail;
1683 }
1684
1685 stream->server = s;
1686 LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
1687 s->n_stdout_streams ++;
1688
1689 return 0;
1690
1691fail:
1692 stdout_stream_free(stream);
1693 return r;
1694}
1695
6c1e6b98
LP		 1696static int parse_kernel_timestamp(char **_p, usec_t *t) {
1697 usec_t r;
1698 int k, i;
1699 char *p;
1700
1701 assert(_p);
1702 assert(*_p);
1703 assert(t);
1704
1705 p = *_p;
1706
1707 if (strlen(p) < 14 || p[0] != '[' || p[13] != ']' || p[6] != '.')
1708 return 0;
1709
1710 r = 0;
1711
1712 for (i = 1; i <= 5; i++) {
1713 r *= 10;
1714
1715 if (p[i] == ' ')
1716 continue;
1717
1718 k = undecchar(p[i]);
1719 if (k < 0)
1720 return 0;
1721
1722 r += k;
1723 }
1724
1725 for (i = 7; i <= 12; i++) {
1726 r *= 10;
1727
1728 k = undecchar(p[i]);
1729 if (k < 0)
1730 return 0;
1731
1732 r += k;
1733 }
1734
1735 *t = r;
1736 *_p += 14;
1737 *_p += strspn(*_p, WHITESPACE);
1738
1739 return 1;
1740}
1741
1742static void proc_kmsg_line(Server *s, const char *p) {
1743 struct iovec iovec[N_IOVEC_META_FIELDS + 7];
1744 char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL;
1745 int priority = LOG_KERN | LOG_INFO;
1746 unsigned n = 0;
1747 usec_t usec;
1748 char *identifier = NULL, *pid = NULL;
1749
1750 assert(s);
1751 assert(p);
1752
0dad12c1
LP		 1753 if (isempty(p))
1754 return;
1755
6c1e6b98
LP		 1756 parse_syslog_priority((char **) &p, &priority);
1757
1758 if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
1759 return;
1760
1761 if (parse_kernel_timestamp((char **) &p, &usec) > 0) {
1762 if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu",
1763 (unsigned long long) usec) >= 0)
1764 IOVEC_SET_STRING(iovec[n++], source_time);
1765 }
1766
1767 IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=kernel");
1768
1769 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
1770 IOVEC_SET_STRING(iovec[n++], syslog_priority);
1771
1772 if ((priority & LOG_FACMASK) == LOG_KERN) {
1773
1774 if (s->forward_to_syslog)
1775 forward_syslog(s, priority, "kernel", p, NULL, NULL);
1776
1777 IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel");
1778 } else {
1779 read_identifier(&p, &identifier, &pid);
1780
1781 if (s->forward_to_syslog)
1782 forward_syslog(s, priority, identifier, p, NULL, NULL);
1783
1784 if (identifier) {
1785 syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
1786 if (syslog_identifier)
1787 IOVEC_SET_STRING(iovec[n++], syslog_identifier);
1788 }
1789
1790 if (pid) {
1791 syslog_pid = strappend("SYSLOG_PID=", pid);
1792 if (syslog_pid)
1793 IOVEC_SET_STRING(iovec[n++], syslog_pid);
1794 }
1795
1796 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
1797 IOVEC_SET_STRING(iovec[n++], syslog_facility);
1798 }
1799
1800 message = strappend("MESSAGE=", p);
1801 if (message)
1802 IOVEC_SET_STRING(iovec[n++], message);
1803
7f2c63cb 1804 dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, priority);
6c1e6b98
LP		 1805
1806 free(message);
1807 free(syslog_priority);
1808 free(syslog_identifier);
1809 free(syslog_pid);
1810 free(syslog_facility);
1811 free(source_time);
1812 free(identifier);
1813 free(pid);
1814}
1815
1816static void proc_kmsg_scan(Server *s) {
1817 char *p;
1818 size_t remaining;
1819
1820 assert(s);
1821
1822 p = s->proc_kmsg_buffer;
1823 remaining = s->proc_kmsg_length;
1824 for (;;) {
1825 char *end;
1826 size_t skip;
1827
1828 end = memchr(p, '\n', remaining);
1829 if (end)
1830 skip = end - p + 1;
1831 else if (remaining >= sizeof(s->proc_kmsg_buffer) - 1) {
1832 end = p + sizeof(s->proc_kmsg_buffer) - 1;
1833 skip = remaining;
1834 } else
1835 break;
1836
1837 *end = 0;
1838
1839 proc_kmsg_line(s, p);
1840
1841 remaining -= skip;
1842 p += skip;
1843 }
1844
1845 if (p > s->proc_kmsg_buffer) {
1846 memmove(s->proc_kmsg_buffer, p, remaining);
1847 s->proc_kmsg_length = remaining;
1848 }
1849}
1850
cf244689
LP		 1851static int system_journal_open(Server *s) {
1852 int r;
1853 char *fn;
1854 sd_id128_t machine;
1855 char ids[33];
1856
1857 r = sd_id128_get_machine(&machine);
1858 if (r < 0)
1859 return r;
1860
1861 sd_id128_to_string(machine, ids);
1862
1863 if (!s->system_journal) {
1864
1865 /* First try to create the machine path, but not the prefix */
1866 fn = strappend("/var/log/journal/", ids);
1867 if (!fn)
1868 return -ENOMEM;
1869 (void) mkdir(fn, 0755);
1870 free(fn);
1871
1872 /* The create the system journal file */
1873 fn = join("/var/log/journal/", ids, "/system.journal", NULL);
1874 if (!fn)
1875 return -ENOMEM;
1876
1877 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
1878 free(fn);
1879
1880 if (r >= 0) {
babfc091
LP		 1881 journal_default_metrics(&s->system_metrics, s->system_journal->fd);
1882
1883 s->system_journal->metrics = s->system_metrics;
cf244689
LP		 1884 s->system_journal->compress = s->compress;
1885
5e41cfec 1886 server_fix_perms(s, s->system_journal, 0);
cf244689
LP		 1887 } else if (r < 0) {
1888
adf7d506
LP		 1889 if (r != -ENOENT && r != -EROFS)
1890 log_warning("Failed to open system journal: %s", strerror(-r));
1891
1892 r = 0;
cf244689
LP		 1893 }
1894 }
1895
1896 if (!s->runtime_journal) {
1897
1898 fn = join("/run/log/journal/", ids, "/system.journal", NULL);
1899 if (!fn)
1900 return -ENOMEM;
1901
1902 if (s->system_journal) {
1903
1904 /* Try to open the runtime journal, but only
1905 * if it already exists, so that we can flush
1906 * it into the system journal */
1907
1908 r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal);
1909 free(fn);
1910
1911 if (r < 0) {
adf7d506
LP		 1912 if (r != -ENOENT)
1913 log_warning("Failed to open runtime journal: %s", strerror(-r));
cf244689 1914
adf7d506 1915 r = 0;
cf244689
LP		 1916 }
1917
1918 } else {
1919
1920 /* OK, we really need the runtime journal, so create
1921 * it if necessary. */
1922
1923 (void) mkdir_parents(fn, 0755);
1924 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
1925 free(fn);
1926
1927 if (r < 0) {
1928 log_error("Failed to open runtime journal: %s", strerror(-r));
1929 return r;
1930 }
1931 }
1932
1933 if (s->runtime_journal) {
babfc091
LP		 1934 journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
1935
1936 s->runtime_journal->metrics = s->runtime_metrics;
cf244689
LP		 1937 s->runtime_journal->compress = s->compress;
1938
5e41cfec 1939 server_fix_perms(s, s->runtime_journal, 0);
cf244689
LP		 1940 }
1941 }
1942
1943 return r;
1944}
1945
1946static int server_flush_to_var(Server *s) {
1947 char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
1948 Object *o = NULL;
1949 int r;
1950 sd_id128_t machine;
1951 sd_journal *j;
54a7b863 1952 usec_t ts;
cf244689
LP		 1953
1954 assert(s);
1955
54a7b863
LP		 1956 if (!s->runtime_journal)
1957 return 0;
1958
1959 ts = now(CLOCK_MONOTONIC);
1960 if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
1961 return 0;
1962
1963 s->var_available_timestamp = ts;
1964
cf244689
LP		 1965 system_journal_open(s);
1966
54a7b863 1967 if (!s->system_journal)
cf244689
LP		 1968 return 0;
1969
6c1e6b98
LP		 1970 log_info("Flushing to /var...");
1971
cf244689
LP		 1972 r = sd_id128_get_machine(&machine);
1973 if (r < 0) {
1974 log_error("Failed to get machine id: %s", strerror(-r));
1975 return r;
1976 }
1977
1978 r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
1979 if (r < 0) {
1980 log_error("Failed to read runtime journal: %s", strerror(-r));
1981 return r;
1982 }
1983
1984 SD_JOURNAL_FOREACH(j) {
1985 JournalFile *f;
1986
1987 f = j->current_file;
1988 assert(f && f->current_offset > 0);
1989
1990 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1991 if (r < 0) {
1992 log_error("Can't read entry: %s", strerror(-r));
1993 goto finish;
1994 }
1995
1996 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
1997 if (r == -E2BIG) {
1998 log_info("Allocation limit reached.");
1999
2000 journal_file_post_change(s->system_journal);
b1a0ab71 2001 server_rotate(s);
cf244689
LP		 2002 server_vacuum(s);
2003
2004 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
2005 }
2006
2007 if (r < 0) {
2008 log_error("Can't write entry: %s", strerror(-r));
2009 goto finish;
2010 }
2011 }
2012
2013finish:
2014 journal_file_post_change(s->system_journal);
2015
2016 journal_file_close(s->runtime_journal);
2017 s->runtime_journal = NULL;
2018
2019 if (r >= 0) {
2020 sd_id128_to_string(machine, path + 17);
2021 rm_rf(path, false, true, false);
2022 }
2023
2024 return r;
2025}
2026
6c1e6b98
LP		 2027static int server_read_proc_kmsg(Server *s) {
2028 ssize_t l;
2029 assert(s);
2030 assert(s->proc_kmsg_fd >= 0);
2031
2032 l = read(s->proc_kmsg_fd, s->proc_kmsg_buffer + s->proc_kmsg_length, sizeof(s->proc_kmsg_buffer) - 1 - s->proc_kmsg_length);
2033 if (l < 0) {
2034
2035 if (errno == EAGAIN || errno == EINTR)
2036 return 0;
2037
2038 log_error("Failed to read from kernel: %m");
2039 return -errno;
2040 }
2041
2042 s->proc_kmsg_length += l;
2043
2044 proc_kmsg_scan(s);
2045 return 1;
2046}
2047
2048static int server_flush_proc_kmsg(Server *s) {
2049 int r;
2050
2051 assert(s);
2052
2053 if (s->proc_kmsg_fd < 0)
2054 return 0;
2055
2056 log_info("Flushing /proc/kmsg...");
2057
2058 for (;;) {
2059 r = server_read_proc_kmsg(s);
2060 if (r < 0)
2061 return r;
2062
2063 if (r == 0)
2064 break;
2065 }
2066
2067 return 0;
2068}
2069
fe652127
LP		 2070static int process_event(Server *s, struct epoll_event *ev) {
2071 assert(s);
2072
87d2c1ff
LP		 2073 if (ev->data.fd == s->signal_fd) {
2074 struct signalfd_siginfo sfsi;
2075 ssize_t n;
2076
fe652127
LP		 2077 if (ev->events != EPOLLIN) {
2078 log_info("Got invalid event from epoll.");
2079 return -EIO;
2080 }
2081
87d2c1ff
LP		 2082 n = read(s->signal_fd, &sfsi, sizeof(sfsi));
2083 if (n != sizeof(sfsi)) {
2084
2085 if (n >= 0)
2086 return -EIO;
2087
2088 if (errno == EINTR || errno == EAGAIN)
6c1e6b98 2089 return 1;
87d2c1ff
LP		 2090
2091 return -errno;
2092 }
2093
cf244689
LP		 2094 if (sfsi.ssi_signo == SIGUSR1) {
2095 server_flush_to_var(s);
2096 return 0;
2097 }
2098
87d2c1ff
LP		 2099 log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
2100 return 0;
2101
6c1e6b98
LP		 2102 } else if (ev->data.fd == s->proc_kmsg_fd) {
2103 int r;
2104
2105 if (ev->events != EPOLLIN) {
2106 log_info("Got invalid event from epoll.");
2107 return -EIO;
2108 }
2109
2110 r = server_read_proc_kmsg(s);
2111 if (r < 0)
2112 return r;
2113
2114 return 1;
2115
fe652127
LP		 2116 } else if (ev->data.fd == s->native_fd ||
2117 ev->data.fd == s->syslog_fd) {
2118
2119 if (ev->events != EPOLLIN) {
2120 log_info("Got invalid event from epoll.");
2121 return -EIO;
2122 }
cec736d2 2123
87d2c1ff 2124 for (;;) {
87d2c1ff
LP		 2125 struct msghdr msghdr;
2126 struct iovec iovec;
2127 struct ucred *ucred = NULL;
2128 struct timeval *tv = NULL;
2129 struct cmsghdr *cmsg;
7f2c63cb
LP		 2130 char *label = NULL;
2131 size_t label_len = 0;
87d2c1ff
LP		 2132 union {
2133 struct cmsghdr cmsghdr;
2134 uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
0dad12c1 2135 CMSG_SPACE(sizeof(struct timeval)) +
7f2c63cb 2136 CMSG_SPACE(sizeof(int)) +
2d44fc7b 2137 CMSG_SPACE(PAGE_SIZE)]; /* selinux label */
87d2c1ff
LP		 2138 } control;
2139 ssize_t n;
7f3e6257 2140 int v;
0dad12c1
LP		 2141 int *fds = NULL;
2142 unsigned n_fds = 0;
7f3e6257
LP		 2143
2144 if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
2145 log_error("SIOCINQ failed: %m");
2146 return -errno;
2147 }
2148
7f3e6257
LP		 2149 if (s->buffer_size < (size_t) v) {
2150 void *b;
2151 size_t l;
2152
2153 l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
2154 b = realloc(s->buffer, l+1);
2155
2156 if (!b) {
2157 log_error("Couldn't increase buffer.");
2158 return -ENOMEM;
2159 }
2160
2161 s->buffer_size = l;
2162 s->buffer = b;
2163 }
87d2c1ff
LP		 2164
2165 zero(iovec);
7f3e6257
LP		 2166 iovec.iov_base = s->buffer;
2167 iovec.iov_len = s->buffer_size;
87d2c1ff
LP		 2168
2169 zero(control);
2170 zero(msghdr);
2171 msghdr.msg_iov = &iovec;
2172 msghdr.msg_iovlen = 1;
2173 msghdr.msg_control = &control;
2174 msghdr.msg_controllen = sizeof(control);
2175
0dad12c1 2176 n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
87d2c1ff
LP		 2177 if (n < 0) {
2178
2179 if (errno == EINTR || errno == EAGAIN)
2180 return 1;
2181
2182 log_error("recvmsg() failed: %m");
2183 return -errno;
2184 }
2185
2186 for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
2187
2188 if (cmsg->cmsg_level == SOL_SOCKET &&
2189 cmsg->cmsg_type == SCM_CREDENTIALS &&
2190 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
2191 ucred = (struct ucred*) CMSG_DATA(cmsg);
2192 else if (cmsg->cmsg_level == SOL_SOCKET &&
7f2c63cb
LP		 2193 cmsg->cmsg_type == SCM_SECURITY) {
2194 label = (char*) CMSG_DATA(cmsg);
2195 label_len = cmsg->cmsg_len - CMSG_LEN(0);
2196 } else if (cmsg->cmsg_level == SOL_SOCKET &&
87d2c1ff
LP		 2197 cmsg->cmsg_type == SO_TIMESTAMP &&
2198 cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
2199 tv = (struct timeval*) CMSG_DATA(cmsg);
0dad12c1
LP		 2200 else if (cmsg->cmsg_level == SOL_SOCKET &&
2201 cmsg->cmsg_type == SCM_RIGHTS) {
2202 fds = (int*) CMSG_DATA(cmsg);
2203 n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
2204 }
87d2c1ff
LP		 2205 }
2206
7f3e6257
LP		 2207 if (ev->data.fd == s->syslog_fd) {
2208 char *e;
2209
0dad12c1
LP		 2210 if (n > 0 && n_fds == 0) {
2211 e = memchr(s->buffer, '\n', n);
2212 if (e)
2213 *e = 0;
2214 else
2215 s->buffer[n] = 0;
2216
7f2c63cb 2217 process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len);
0dad12c1
LP		 2218 } else if (n_fds > 0)
2219 log_warning("Got file descriptors via syslog socket. Ignoring.");
2220
2221 } else {
2222 if (n > 0 && n_fds == 0)
7f2c63cb 2223 process_native_message(s, s->buffer, n, ucred, tv, label, label_len);
0dad12c1 2224 else if (n == 0 && n_fds == 1)
7f2c63cb 2225 process_native_file(s, fds[0], ucred, tv, label, label_len);
0dad12c1
LP		 2226 else if (n_fds > 0)
2227 log_warning("Got too many file descriptors via native socket. Ignoring.");
2228 }
87d2c1ff 2229
0dad12c1 2230 close_many(fds, n_fds);
87d2c1ff 2231 }
cec736d2
LP		 2232
2233 return 1;
fe652127
LP		 2234
2235 } else if (ev->data.fd == s->stdout_fd) {
2236
2237 if (ev->events != EPOLLIN) {
2238 log_info("Got invalid event from epoll.");
2239 return -EIO;
2240 }
2241
2242 stdout_stream_new(s);
2243 return 1;
2244
2245 } else {
2246 StdoutStream *stream;
2247
2248 if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
2249 log_info("Got invalid event from epoll.");
2250 return -EIO;
2251 }
2252
2253 /* If it is none of the well-known fds, it must be an
2254 * stdout stream fd. Note that this is a bit ugly here
2255 * (since we rely that none of the well-known fds
2256 * could be interpreted as pointer), but nonetheless
2257 * safe, since the well-known fds would never get an
2258 * fd > 4096, i.e. beyond the first memory page */
2259
2260 stream = ev->data.ptr;
2261
2262 if (stdout_stream_process(stream) <= 0)
2263 stdout_stream_free(stream);
2264
2265 return 1;
87d2c1ff
LP		 2266 }
2267
cec736d2
LP		 2268 log_error("Unknown event.");
2269 return 0;
87d2c1ff
LP		 2270}
2271
7f3e6257
LP		 2272static int open_syslog_socket(Server *s) {
2273 union sockaddr_union sa;
2274 int one, r;
fe652127 2275 struct epoll_event ev;
87d2c1ff
LP		 2276
2277 assert(s);
2278
7f3e6257 2279 if (s->syslog_fd < 0) {
87d2c1ff 2280
6c1e6b98 2281 s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
7f3e6257
LP		 2282 if (s->syslog_fd < 0) {
2283 log_error("socket() failed: %m");
2284 return -errno;
2285 }
2286
2287 zero(sa);
2288 sa.un.sun_family = AF_UNIX;
8b18eb67 2289 strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
7f3e6257
LP		 2290
2291 unlink(sa.un.sun_path);
2292
2293 r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
2294 if (r < 0) {
2295 log_error("bind() failed: %m");
2296 return -errno;
2297 }
2298
2299 chmod(sa.un.sun_path, 0666);
632117b7
LP		 2300 } else
2301 fd_nonblock(s->syslog_fd, 1);
87d2c1ff 2302
7f3e6257
LP		 2303 one = 1;
2304 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
2305 if (r < 0) {
2306 log_error("SO_PASSCRED failed: %m");
2307 return -errno;
87d2c1ff
LP		 2308 }
2309
54ecda32
LP		 2310 one = 1;
2311 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one));
2312 if (r < 0)
2313 log_warning("SO_PASSSEC failed: %m");
2314
7f3e6257
LP		 2315 one = 1;
2316 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
2317 if (r < 0) {
2318 log_error("SO_TIMESTAMP failed: %m");
2319 return -errno;
87d2c1ff
LP		 2320 }
2321
fe652127
LP		 2322 zero(ev);
2323 ev.events = EPOLLIN;
2324 ev.data.fd = s->syslog_fd;
2325 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
2326 log_error("Failed to add syslog server fd to epoll object: %m");
2327 return -errno;
2328 }
2329
7f3e6257
LP		 2330 return 0;
2331}
87d2c1ff 2332
7f3e6257
LP		 2333static int open_native_socket(Server*s) {
2334 union sockaddr_union sa;
2335 int one, r;
fe652127 2336 struct epoll_event ev;
7f3e6257
LP		 2337
2338 assert(s);
2339
2340 if (s->native_fd < 0) {
2341
6c1e6b98 2342 s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
7f3e6257 2343 if (s->native_fd < 0) {
87d2c1ff
LP		 2344 log_error("socket() failed: %m");
2345 return -errno;
2346 }
2347
2348 zero(sa);
2349 sa.un.sun_family = AF_UNIX;
259d2e76 2350 strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
87d2c1ff
LP		 2351
2352 unlink(sa.un.sun_path);
2353
7f3e6257 2354 r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
87d2c1ff
LP		 2355 if (r < 0) {
2356 log_error("bind() failed: %m");
2357 return -errno;
2358 }
2359
2360 chmod(sa.un.sun_path, 0666);
632117b7
LP		 2361 } else
2362 fd_nonblock(s->native_fd, 1);
87d2c1ff
LP		 2363
2364 one = 1;
7f3e6257 2365 r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
87d2c1ff
LP		 2366 if (r < 0) {
2367 log_error("SO_PASSCRED failed: %m");
2368 return -errno;
2369 }
2370
54ecda32
LP		 2371 one = 1;
2372 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one));
2373 if (r < 0)
2374 log_warning("SO_PASSSEC failed: %m");
2375
87d2c1ff 2376 one = 1;
7f3e6257 2377 r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
87d2c1ff
LP		 2378 if (r < 0) {
2379 log_error("SO_TIMESTAMP failed: %m");
2380 return -errno;
2381 }
2382
fe652127
LP		 2383 zero(ev);
2384 ev.events = EPOLLIN;
2385 ev.data.fd = s->native_fd;
2386 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
2387 log_error("Failed to add native server fd to epoll object: %m");
2388 return -errno;
2389 }
2390
7f3e6257
LP		 2391 return 0;
2392}
2393
fe652127
LP		 2394static int open_stdout_socket(Server *s) {
2395 union sockaddr_union sa;
2396 int r;
7f3e6257 2397 struct epoll_event ev;
fe652127
LP		 2398
2399 assert(s);
2400
2401 if (s->stdout_fd < 0) {
2402
6c1e6b98 2403 s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
fe652127
LP		 2404 if (s->stdout_fd < 0) {
2405 log_error("socket() failed: %m");
2406 return -errno;
2407 }
2408
2409 zero(sa);
2410 sa.un.sun_family = AF_UNIX;
259d2e76 2411 strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
fe652127
LP		 2412
2413 unlink(sa.un.sun_path);
2414
2415 r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
2416 if (r < 0) {
2417 log_error("bind() failed: %m");
2418 return -errno;
2419 }
2420
2421 chmod(sa.un.sun_path, 0666);
2422
2423 if (listen(s->stdout_fd, SOMAXCONN) < 0) {
2424 log_error("liste() failed: %m");
2425 return -errno;
2426 }
632117b7
LP		 2427 } else
2428 fd_nonblock(s->stdout_fd, 1);
fe652127
LP		 2429
2430 zero(ev);
2431 ev.events = EPOLLIN;
2432 ev.data.fd = s->stdout_fd;
2433 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) {
2434 log_error("Failed to add stdout server fd to epoll object: %m");
2435 return -errno;
2436 }
2437
2438 return 0;
2439}
2440
6c1e6b98
LP		 2441static int open_proc_kmsg(Server *s) {
2442 struct epoll_event ev;
2443
2444 assert(s);
2445
2446 if (!s->import_proc_kmsg)
2447 return 0;
2448
2449
2450 s->proc_kmsg_fd = open("/proc/kmsg", O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
2451 if (s->proc_kmsg_fd < 0) {
2452 log_warning("Failed to open /proc/kmsg, ignoring: %m");
2453 return 0;
2454 }
2455
2456 zero(ev);
2457 ev.events = EPOLLIN;
2458 ev.data.fd = s->proc_kmsg_fd;
2459 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->proc_kmsg_fd, &ev) < 0) {
2460 log_error("Failed to add /proc/kmsg fd to epoll object: %m");
2461 return -errno;
2462 }
2463
2464 return 0;
2465}
2466
fe652127 2467static int open_signalfd(Server *s) {
7f3e6257 2468 sigset_t mask;
fe652127
LP		 2469 struct epoll_event ev;
2470
2471 assert(s);
2472
2473 assert_se(sigemptyset(&mask) == 0);
cf244689 2474 sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, -1);
fe652127
LP		 2475 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
2476
2477 s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
2478 if (s->signal_fd < 0) {
2479 log_error("signalfd(): %m");
2480 return -errno;
2481 }
2482
2483 zero(ev);
2484 ev.events = EPOLLIN;
2485 ev.data.fd = s->signal_fd;
2486
2487 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) {
2488 log_error("epoll_ctl(): %m");
2489 return -errno;
2490 }
2491
2492 return 0;
2493}
2494
effb1102
LP		 2495static int server_parse_proc_cmdline(Server *s) {
2496 char *line, *w, *state;
2497 int r;
2498 size_t l;
2499
2500 if (detect_container(NULL) > 0)
2501 return 0;
2502
2503 r = read_one_line_file("/proc/cmdline", &line);
2504 if (r < 0) {
2505 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
2506 return 0;
2507 }
2508
2509 FOREACH_WORD_QUOTED(w, l, line, state) {
2510 char *word;
2511
2512 word = strndup(w, l);
2513 if (!word) {
2514 r = -ENOMEM;
2515 goto finish;
2516 }
2517
2518 if (startswith(word, "systemd_journald.forward_to_syslog=")) {
2519 r = parse_boolean(word + 35);
2520 if (r < 0)
2521 log_warning("Failed to parse forward to syslog switch %s. Ignoring.", word + 35);
2522 else
2523 s->forward_to_syslog = r;
2524 } else if (startswith(word, "systemd_journald.forward_to_kmsg=")) {
2525 r = parse_boolean(word + 33);
2526 if (r < 0)
2527 log_warning("Failed to parse forward to kmsg switch %s. Ignoring.", word + 33);
2528 else
2529 s->forward_to_kmsg = r;
2530 } else if (startswith(word, "systemd_journald.forward_to_console=")) {
2531 r = parse_boolean(word + 36);
2532 if (r < 0)
2533 log_warning("Failed to parse forward to console switch %s. Ignoring.", word + 36);
2534 else
2535 s->forward_to_console = r;
2536 }
2537
2538 free(word);
2539 }
2540
2541 r = 0;
2542
2543finish:
2544 free(line);
2545 return r;
2546}
2547
e6960940
LP		 2548static int server_parse_config_file(Server *s) {
2549 FILE *f;
2550 const char *fn;
2551 int r;
2552
2553 assert(s);
2554
2555 fn = "/etc/systemd/systemd-journald.conf";
2556 f = fopen(fn, "re");
2557 if (!f) {
2558 if (errno == ENOENT)
2559 return 0;
2560
2561 log_warning("Failed to open configuration file %s: %m", fn);
2562 return -errno;
2563 }
2564
2565 r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s);
2566 if (r < 0)
2567 log_warning("Failed to parse configuration file: %s", strerror(-r));
2568
2569 fclose(f);
2570
2571 return r;
2572}
2573
fe652127
LP		 2574static int server_init(Server *s) {
2575 int n, r, fd;
7f3e6257
LP		 2576
2577 assert(s);
2578
2579 zero(*s);
6c1e6b98 2580 s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->proc_kmsg_fd = -1;
807e17f0 2581 s->compress = true;
7f3e6257 2582
e6960940
LP		 2583 s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
2584 s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
2585
224f2ee2 2586 s->forward_to_syslog = true;
6c1e6b98 2587 s->import_proc_kmsg = true;
224f2ee2 2588
babfc091
LP		 2589 memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
2590 memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
2591
e6960940 2592 server_parse_config_file(s);
effb1102 2593 server_parse_proc_cmdline(s);
e6960940 2594
fe652127
LP		 2595 s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
2596 if (!s->user_journals) {
2597 log_error("Out of memory.");
2598 return -ENOMEM;
2599 }
2600
7f3e6257
LP		 2601 s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
2602 if (s->epoll_fd < 0) {
2603 log_error("Failed to create epoll object: %m");
2604 return -errno;
2605 }
2606
2607 n = sd_listen_fds(true);
2608 if (n < 0) {
2609 log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
2610 return n;
2611 }
2612
2613 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
2614
259d2e76 2615 if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) {
7f3e6257 2616
fe652127
LP		 2617 if (s->native_fd >= 0) {
2618 log_error("Too many native sockets passed.");
7f3e6257
LP		 2619 return -EINVAL;
2620 }
2621
fe652127 2622 s->native_fd = fd;
7f3e6257 2623
259d2e76 2624 } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) {
7f3e6257 2625
fe652127
LP		 2626 if (s->stdout_fd >= 0) {
2627 log_error("Too many stdout sockets passed.");
7f3e6257
LP		 2628 return -EINVAL;
2629 }
2630
fe652127
LP		 2631 s->stdout_fd = fd;
2632
2633 } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
2634
2635 if (s->syslog_fd >= 0) {
2636 log_error("Too many /dev/log sockets passed.");
2637 return -EINVAL;
2638 }
2639
2640 s->syslog_fd = fd;
2641
7f3e6257
LP		 2642 } else {
2643 log_error("Unknown socket passed.");
2644 return -EINVAL;
2645 }
2646 }
2647
2648 r = open_syslog_socket(s);
2649 if (r < 0)
2650 return r;
2651
7f3e6257
LP		 2652 r = open_native_socket(s);
2653 if (r < 0)
2654 return r;
2655
fe652127
LP		 2656 r = open_stdout_socket(s);
2657 if (r < 0)
2658 return r;
87d2c1ff 2659
6c1e6b98
LP		 2660 r = open_proc_kmsg(s);
2661 if (r < 0)
2662 return r;
2663
ed49ef3f
LP		 2664 r = system_journal_open(s);
2665 if (r < 0)
87d2c1ff 2666 return r;
87d2c1ff 2667
fe652127
LP		 2668 r = open_signalfd(s);
2669 if (r < 0)
2670 return r;
87d2c1ff 2671
e6960940 2672 s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst);
6e409ce1
LP		 2673 if (!s->rate_limit)
2674 return -ENOMEM;
2675
87d2c1ff
LP		 2676 return 0;
2677}
2678
2679static void server_done(Server *s) {
2680 JournalFile *f;
2681 assert(s);
2682
fe652127
LP		 2683 while (s->stdout_streams)
2684 stdout_stream_free(s->stdout_streams);
2685
87d2c1ff
LP		 2686 if (s->system_journal)
2687 journal_file_close(s->system_journal);
2688
f4b47811
LP		 2689 if (s->runtime_journal)
2690 journal_file_close(s->runtime_journal);
2691
87d2c1ff
LP		 2692 while ((f = hashmap_steal_first(s->user_journals)))
2693 journal_file_close(f);
2694
2695 hashmap_free(s->user_journals);
2696
2697 if (s->epoll_fd >= 0)
2698 close_nointr_nofail(s->epoll_fd);
2699
2700 if (s->signal_fd >= 0)
2701 close_nointr_nofail(s->signal_fd);
2702
2703 if (s->syslog_fd >= 0)
2704 close_nointr_nofail(s->syslog_fd);
7f3e6257
LP		 2705
2706 if (s->native_fd >= 0)
2707 close_nointr_nofail(s->native_fd);
fe652127
LP		 2708
2709 if (s->stdout_fd >= 0)
2710 close_nointr_nofail(s->stdout_fd);
6e409ce1 2711
6c1e6b98
LP		 2712 if (s->proc_kmsg_fd >= 0)
2713 close_nointr_nofail(s->proc_kmsg_fd);
2714
6e409ce1
LP		 2715 if (s->rate_limit)
2716 journal_rate_limit_free(s->rate_limit);
783d2675
LP		 2717
2718 free(s->buffer);
87d2c1ff
LP		 2719}
2720
2721int main(int argc, char *argv[]) {
2722 Server server;
2723 int r;
2724
2725 /* if (getppid() != 1) { */
2726 /* log_error("This program should be invoked by init only."); */
2727 /* return EXIT_FAILURE; */
2728 /* } */
2729
2730 if (argc > 1) {
2731 log_error("This program does not take arguments.");
2732 return EXIT_FAILURE;
2733 }
2734
f4b47811 2735 log_set_target(LOG_TARGET_CONSOLE);
87d2c1ff
LP		 2736 log_parse_environment();
2737 log_open();
2738
2739 umask(0022);
2740
2741 r = server_init(&server);
2742 if (r < 0)
2743 goto finish;
2744
e6960940
LP		 2745 server_vacuum(&server);
2746 server_flush_to_var(&server);
6c1e6b98 2747 server_flush_proc_kmsg(&server);
e6960940 2748
87d2c1ff 2749 log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
224f2ee2 2750 driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
87d2c1ff
LP		 2751
2752 sd_notify(false,
2753 "READY=1\n"
fe652127 2754 "STATUS=Processing requests...");
50f20cfd 2755
87d2c1ff
LP		 2756 for (;;) {
2757 struct epoll_event event;
2758
2759 r = epoll_wait(server.epoll_fd, &event, 1, -1);
2760 if (r < 0) {
2761
2762 if (errno == EINTR)
2763 continue;
2764
2765 log_error("epoll_wait() failed: %m");
2766 r = -errno;
2767 goto finish;
2768 } else if (r == 0)
2769 break;
2770
2771 r = process_event(&server, &event);
2772 if (r < 0)
2773 goto finish;
2774 else if (r == 0)
2775 break;
2776 }
2777
fe652127 2778 log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
224f2ee2 2779 driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
fe652127 2780
87d2c1ff
LP		 2781finish:
2782 sd_notify(false,
2783 "STATUS=Shutting down...");
2784
2785 server_done(&server);
2786
2787 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
2788}
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