1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
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.
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.
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/>.
22 #include <sys/epoll.h>
23 #include <sys/socket.h>
25 #include <sys/signalfd.h>
29 #include <acl/libacl.h>
31 #include <sys/ioctl.h>
32 #include <linux/sockios.h>
33 #include <sys/statvfs.h>
35 #include <systemd/sd-journal.h>
36 #include <systemd/sd-login.h>
37 #include <systemd/sd-messages.h>
38 #include <systemd/sd-daemon.h>
41 #include "journal-file.h"
42 #include "socket-util.h"
44 #include "cgroup-util.h"
46 #include "journal-rate-limit.h"
47 #include "journal-internal.h"
48 #include "conf-parser.h"
51 #define USER_JOURNALS_MAX 1024
52 #define STDOUT_STREAMS_MAX 4096
54 #define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
55 #define DEFAULT_RATE_LIMIT_BURST 200
57 #define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
59 #define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
61 #define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
63 #define N_IOVEC_META_FIELDS 16
65 typedef enum StdoutStreamState {
67 STDOUT_STREAM_PRIORITY,
68 STDOUT_STREAM_PRIORITY_PREFIX,
69 STDOUT_STREAM_FORWARD_TO_SYSLOG,
70 STDOUT_STREAM_FORWARD_TO_KMSG,
71 STDOUT_STREAM_FORWARD_TO_CONSOLE,
77 StdoutStreamState state;
85 bool priority_prefix:1;
86 bool forward_to_syslog:1;
87 bool forward_to_kmsg:1;
88 bool forward_to_console:1;
90 char buffer[LINE_MAX+1];
93 LIST_FIELDS(StdoutStream, stdout_stream);
96 static int server_flush_to_var(Server *s);
98 static uint64_t available_space(Server *s) {
103 uint64_t sum = 0, avail = 0, ss_avail = 0;
109 ts = now(CLOCK_MONOTONIC);
111 if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts)
112 return s->cached_available_space;
114 r = sd_id128_get_machine(&machine);
118 if (s->system_journal) {
119 f = "/var/log/journal/";
120 m = &s->system_metrics;
122 f = "/run/log/journal/";
123 m = &s->runtime_metrics;
128 p = strappend(f, sd_id128_to_string(machine, ids));
138 if (fstatvfs(dirfd(d), &ss) < 0)
143 struct dirent buf, *de;
146 k = readdir_r(d, &buf, &de);
155 if (!dirent_is_file_with_suffix(de, ".journal"))
158 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
161 sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
164 avail = sum >= m->max_use ? 0 : m->max_use - sum;
166 ss_avail = ss.f_bsize * ss.f_bavail;
168 ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free;
170 if (ss_avail < avail)
173 s->cached_available_space = avail;
174 s->cached_available_space_timestamp = ts;
182 static void fix_perms(JournalFile *f, uid_t uid) {
185 acl_permset_t permset;
190 r = fchmod_and_fchown(f->fd, 0640, 0, 0);
192 log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
197 acl = acl_get_fd(f->fd);
199 log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
203 r = acl_find_uid(acl, uid, &entry);
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);
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);
221 if (acl_set_fd(f->fd, acl) < 0)
222 log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
228 static JournalFile* find_journal(Server *s, uid_t uid) {
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. */
242 if (s->runtime_journal)
243 return s->runtime_journal;
246 return s->system_journal;
248 r = sd_id128_get_machine(&machine);
250 return s->system_journal;
252 f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
256 if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0)
257 return s->system_journal;
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);
263 journal_file_close(f);
266 r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
270 return s->system_journal;
273 f->metrics = s->system_metrics;
274 f->compress = s->compress;
276 r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
278 journal_file_close(f);
279 return s->system_journal;
285 static void server_rotate(Server *s) {
291 log_info("Rotating...");
293 if (s->runtime_journal) {
294 r = journal_file_rotate(&s->runtime_journal);
296 log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
299 if (s->system_journal) {
300 r = journal_file_rotate(&s->system_journal);
302 log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
305 HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
306 r = journal_file_rotate(&f);
308 log_error("Failed to rotate %s: %s", f->path, strerror(-r));
310 hashmap_replace(s->user_journals, k, f);
314 static void server_vacuum(Server *s) {
320 log_info("Vacuuming...");
322 r = sd_id128_get_machine(&machine);
324 log_error("Failed to get machine ID: %s", strerror(-r));
328 sd_id128_to_string(machine, ids);
330 if (s->system_journal) {
331 if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
332 log_error("Out of memory.");
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));
343 if (s->runtime_journal) {
344 if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
345 log_error("Out of memory.");
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));
355 s->cached_available_space_timestamp = 0;
358 static char *shortened_cgroup_path(pid_t pid) {
360 char *process_path, *init_path, *path;
364 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path);
368 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path);
374 if (endswith(init_path, "/system"))
375 init_path[strlen(init_path) - 7] = 0;
376 else if (streq(init_path, "/"))
379 if (startswith(process_path, init_path)) {
382 p = strdup(process_path + strlen(init_path));
400 static void dispatch_message_real(Server *s,
401 struct iovec *iovec, unsigned n, unsigned m,
403 struct timeval *tv) {
405 char *pid = NULL, *uid = NULL, *gid = NULL,
406 *source_time = NULL, *boot_id = NULL, *machine_id = NULL,
407 *comm = NULL, *cmdline = NULL, *hostname = NULL,
408 *audit_session = NULL, *audit_loginuid = NULL,
409 *exe = NULL, *cgroup = NULL, *session = NULL,
410 *owner_uid = NULL, *unit = NULL;
416 uid_t loginuid = 0, realuid = 0;
418 bool vacuumed = false;
423 assert(n + N_IOVEC_META_FIELDS <= m);
429 realuid = ucred->uid;
431 if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
432 IOVEC_SET_STRING(iovec[n++], pid);
434 if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
435 IOVEC_SET_STRING(iovec[n++], uid);
437 if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
438 IOVEC_SET_STRING(iovec[n++], gid);
440 r = get_process_comm(ucred->pid, &t);
442 comm = strappend("_COMM=", t);
446 IOVEC_SET_STRING(iovec[n++], comm);
449 r = get_process_exe(ucred->pid, &t);
451 exe = strappend("_EXE=", t);
455 IOVEC_SET_STRING(iovec[n++], exe);
458 r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
460 cmdline = strappend("_CMDLINE=", t);
464 IOVEC_SET_STRING(iovec[n++], cmdline);
467 r = audit_session_from_pid(ucred->pid, &audit);
469 if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0)
470 IOVEC_SET_STRING(iovec[n++], audit_session);
472 r = audit_loginuid_from_pid(ucred->pid, &loginuid);
474 if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
475 IOVEC_SET_STRING(iovec[n++], audit_loginuid);
477 t = shortened_cgroup_path(ucred->pid);
479 cgroup = strappend("_SYSTEMD_CGROUP=", t);
483 IOVEC_SET_STRING(iovec[n++], cgroup);
486 if (sd_pid_get_session(ucred->pid, &t) >= 0) {
487 session = strappend("_SYSTEMD_SESSION=", t);
491 IOVEC_SET_STRING(iovec[n++], session);
494 if (sd_pid_get_unit(ucred->pid, &t) >= 0) {
495 unit = strappend("_SYSTEMD_UNIT=", t);
499 IOVEC_SET_STRING(iovec[n++], unit);
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);
508 if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
509 (unsigned long long) timeval_load(tv)) >= 0)
510 IOVEC_SET_STRING(iovec[n++], source_time);
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. */
516 r = sd_id128_get_boot(&id);
518 if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
519 IOVEC_SET_STRING(iovec[n++], boot_id);
521 r = sd_id128_get_machine(&id);
523 if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
524 IOVEC_SET_STRING(iovec[n++], machine_id);
526 t = gethostname_malloc();
528 hostname = strappend("_HOSTNAME=", t);
531 IOVEC_SET_STRING(iovec[n++], hostname);
536 server_flush_to_var(s);
539 f = find_journal(s, realuid == 0 ? 0 : loginuid);
541 log_warning("Dropping message, as we can't find a place to store the data.");
543 r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
545 if (r == -E2BIG && !vacuumed) {
546 log_info("Allocation limit reached.");
552 log_info("Retrying write.");
557 log_error("Failed to write entry, ignoring: %s", strerror(-r));
571 free(audit_loginuid);
578 static 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];
589 IOVEC_SET_STRING(iovec[n++], "PRIORITY=5");
591 memcpy(buffer, "MESSAGE=", 8);
592 va_start(ap, format);
593 vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap);
595 char_array_0(buffer);
596 IOVEC_SET_STRING(iovec[n++], buffer);
598 snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id));
600 IOVEC_SET_STRING(iovec[n++], mid);
603 ucred.pid = getpid();
604 ucred.uid = getuid();
605 ucred.gid = getgid();
607 dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL);
610 static void dispatch_message(Server *s,
611 struct iovec *iovec, unsigned n, unsigned m,
616 char *path = NULL, *c;
619 assert(iovec || n == 0);
627 path = shortened_cgroup_path(ucred->pid);
631 /* example: /user/lennart/3/foobar
632 * /system/dbus.service/foobar
634 * So let's cut of everything past the third /, since that is
635 * wher user directories start */
637 c = strchr(path, '/');
639 c = strchr(c+1, '/');
641 c = strchr(c+1, '/');
647 rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available_space(s));
654 /* Write a suppression message if we suppressed something */
656 driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path);
661 dispatch_message_real(s, iovec, n, m, ucred, tv);
664 static 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;
668 struct cmsghdr cmsghdr;
669 uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
671 union sockaddr_union sa;
678 msghdr.msg_iov = (struct iovec*) iovec;
679 msghdr.msg_iovlen = n_iovec;
682 sa.un.sun_family = AF_UNIX;
683 strncpy(sa.un.sun_path, "/run/systemd/journal/syslog", sizeof(sa.un.sun_path));
684 msghdr.msg_name = &sa;
685 msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
689 msghdr.msg_control = &control;
690 msghdr.msg_controllen = sizeof(control);
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;
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. */
704 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
707 if (ucred && errno == ESRCH) {
710 /* Hmm, presumably the sender process vanished
711 * by now, so let's fix it as good as we
716 memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
718 if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
722 log_debug("Failed to forward syslog message: %m");
725 static void forward_syslog_raw(Server *s, const char *buffer, struct ucred *ucred, struct timeval *tv) {
731 IOVEC_SET_STRING(iovec, buffer);
732 forward_syslog_iovec(s, &iovec, 1, ucred, tv);
735 static 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];
741 char *tag_buf = NULL;
744 assert(priority >= 0);
745 assert(priority <= 999);
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);
753 /* Second: timestamp */
754 t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC));
758 if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
760 IOVEC_SET_STRING(iovec[n++], header_time);
762 /* Third: tag and PID */
765 get_process_comm(ucred->pid, &tag_buf);
769 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
770 char_array_0(header_pid);
773 IOVEC_SET_STRING(iovec[n++], tag);
775 IOVEC_SET_STRING(iovec[n++], header_pid);
777 IOVEC_SET_STRING(iovec[n++], tag);
778 IOVEC_SET_STRING(iovec[n++], ": ");
781 /* Fourth: message */
782 IOVEC_SET_STRING(iovec[n++], message);
784 forward_syslog_iovec(s, iovec, n, ucred, tv);
789 static int fixup_priority(int priority) {
791 if ((priority & LOG_FACMASK) == 0)
792 return (priority & LOG_PRIMASK) | LOG_USER;
797 static 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];
801 char *tag_buf = NULL;
805 assert(priority >= 0);
806 assert(priority <= 999);
809 /* Never allow messages with kernel facility to be written to
810 * kmsg, regardless where the data comes from. */
811 priority = fixup_priority(priority);
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);
818 /* Second: tag and PID */
821 get_process_comm(ucred->pid, &tag_buf);
825 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
826 char_array_0(header_pid);
829 IOVEC_SET_STRING(iovec[n++], tag);
831 IOVEC_SET_STRING(iovec[n++], header_pid);
833 IOVEC_SET_STRING(iovec[n++], tag);
834 IOVEC_SET_STRING(iovec[n++], ": ");
837 /* Fourth: message */
838 IOVEC_SET_STRING(iovec[n++], message);
839 IOVEC_SET_STRING(iovec[n++], "\n");
841 fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
843 log_debug("Failed to open /dev/kmsg for logging: %s", strerror(errno));
847 if (writev(fd, iovec, n) < 0)
848 log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
850 close_nointr_nofail(fd);
856 static void forward_console(Server *s, const char *tag, const char *message, struct ucred *ucred) {
857 struct iovec iovec[4];
860 char *tag_buf = NULL;
865 /* First: tag and PID */
868 get_process_comm(ucred->pid, &tag_buf);
872 snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
873 char_array_0(header_pid);
876 IOVEC_SET_STRING(iovec[n++], tag);
878 IOVEC_SET_STRING(iovec[n++], header_pid);
880 IOVEC_SET_STRING(iovec[n++], tag);
881 IOVEC_SET_STRING(iovec[n++], ": ");
885 IOVEC_SET_STRING(iovec[n++], message);
886 IOVEC_SET_STRING(iovec[n++], "\n");
888 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
890 log_debug("Failed to open /dev/console for logging: %s", strerror(errno));
894 if (writev(fd, iovec, n) < 0)
895 log_debug("Failed to write to /dev/console for logging: %s", strerror(errno));
897 close_nointr_nofail(fd);
903 static void read_tag(const char **buf, char **tag) {
913 p += strspn(p, WHITESPACE);
914 l = strcspn(p, WHITESPACE);
945 *buf += strspn(*buf, WHITESPACE);
948 static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
949 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_tag = NULL;
950 struct iovec iovec[N_IOVEC_META_FIELDS + 4];
952 int priority = LOG_USER | LOG_INFO;
958 if (s->forward_to_syslog)
959 forward_syslog_raw(s, buf, ucred, tv);
961 parse_syslog_priority((char**) &buf, &priority);
962 skip_syslog_date((char**) &buf);
963 read_tag(&buf, &tag);
965 if (s->forward_to_kmsg)
966 forward_kmsg(s, priority, tag, buf, ucred);
968 if (s->forward_to_console)
969 forward_console(s, tag, buf, ucred);
971 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
972 IOVEC_SET_STRING(iovec[n++], syslog_priority);
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);
979 syslog_tag = strappend("SYSLOG_TAG=", tag);
981 IOVEC_SET_STRING(iovec[n++], syslog_tag);
984 message = strappend("MESSAGE=", buf);
986 IOVEC_SET_STRING(iovec[n++], message);
988 dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, priority);
992 free(syslog_priority);
993 free(syslog_facility);
997 static bool valid_user_field(const char *p, size_t l) {
1000 /* We kinda enforce POSIX syntax recommendations for
1001 environment variables here, but make a couple of additional
1004 http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
1006 /* No empty field names */
1010 /* Don't allow names longer than 64 chars */
1014 /* Variables starting with an underscore are protected */
1018 /* Don't allow digits as first character */
1019 if (p[0] >= '0' && p[0] <= '9')
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') ||
1032 static 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;
1037 int priority = LOG_INFO;
1038 char *tag = NULL, *message = NULL;
1041 assert(buffer || n == 0);
1044 remaining = buffer_size;
1046 while (remaining > 0) {
1049 e = memchr(p, '\n', remaining);
1052 /* Trailing noise, let's ignore it, and flush what we collected */
1053 log_debug("Received message with trailing noise, ignoring.");
1058 /* Entry separator */
1059 dispatch_message(s, iovec, n, m, ucred, tv, priority);
1061 priority = LOG_INFO;
1068 if (*p == '.' || *p == '#') {
1069 /* Ignore control commands for now, and
1071 remaining -= (e - p) + 1;
1076 /* A property follows */
1078 if (n+N_IOVEC_META_FIELDS >= m) {
1082 u = MAX((n+N_IOVEC_META_FIELDS) * 2U, 4U);
1083 c = realloc(iovec, u * sizeof(struct iovec));
1085 log_error("Out of memory");
1093 q = memchr(p, '=', e - p);
1095 if (valid_user_field(p, q - p)) {
1100 /* If the field name starts with an
1101 * underscore, skip the variable,
1102 * since that indidates a trusted
1104 iovec[n].iov_base = (char*) p;
1105 iovec[n].iov_len = l;
1108 /* We need to determine the priority
1109 * of this entry for the rate limiting
1112 memcmp(p, "PRIORITY=", 9) == 0 &&
1113 p[9] >= '0' && p[9] <= '9')
1114 priority = (priority & LOG_FACMASK) | (p[9] - '0');
1117 memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
1118 p[16] >= '0' && p[16] <= '9')
1119 priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
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);
1128 memcmp(p, "SYSLOG_TAG=", 11) == 0) {
1131 t = strndup(p + 11, l - 11);
1136 } else if (l >= 8 &&
1137 memcmp(p, "MESSAGE=", 8) == 0) {
1140 t = strndup(p + 8, l - 8);
1148 remaining -= (e - p) + 1;
1155 if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
1156 log_debug("Failed to parse message, ignoring.");
1160 memcpy(&l, e + 1, sizeof(uint64_t));
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.");
1169 k = malloc((e - p) + 1 + l);
1171 log_error("Out of memory");
1175 memcpy(k, p, e - p);
1177 memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
1179 if (valid_user_field(p, e - p)) {
1180 iovec[n].iov_base = k;
1181 iovec[n].iov_len = (e - p) + 1 + l;
1186 remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
1187 p = e + 1 + sizeof(uint64_t) + l + 1;
1192 if (s->forward_to_syslog)
1193 forward_syslog(s, priority, tag, message, ucred, tv);
1195 if (s->forward_to_kmsg)
1196 forward_kmsg(s, priority, tag, message, ucred);
1198 if (s->forward_to_console)
1199 forward_console(s, tag, message, ucred);
1202 dispatch_message(s, iovec, n, m, ucred, tv, priority);
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);
1213 static 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;
1222 priority = s->priority;
1224 if (s->priority_prefix)
1225 parse_syslog_priority((char**) &p, &priority);
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);
1230 if (s->forward_to_kmsg || s->server->forward_to_kmsg)
1231 forward_kmsg(s->server, priority, s->tag, p, &s->ucred);
1233 if (s->forward_to_console || s->server->forward_to_console)
1234 forward_console(s->server, s->tag, p, &s->ucred);
1236 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
1237 IOVEC_SET_STRING(iovec[n++], syslog_priority);
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);
1244 syslog_tag = strappend("SYSLOG_TAG=", s->tag);
1246 IOVEC_SET_STRING(iovec[n++], syslog_tag);
1249 message = strappend("MESSAGE=", p);
1251 IOVEC_SET_STRING(iovec[n++], message);
1253 dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority);
1256 free(syslog_priority);
1257 free(syslog_facility);
1263 static int stdout_stream_line(StdoutStream *s, char *p) {
1273 case STDOUT_STREAM_TAG:
1276 log_error("Out of memory");
1280 s->state = STDOUT_STREAM_PRIORITY;
1283 case STDOUT_STREAM_PRIORITY:
1284 r = safe_atoi(p, &s->priority);
1285 if (r < 0 || s->priority <= 0 || s->priority >= 999) {
1286 log_warning("Failed to parse log priority line.");
1290 s->state = STDOUT_STREAM_PRIORITY_PREFIX;
1293 case STDOUT_STREAM_PRIORITY_PREFIX:
1294 r = parse_boolean(p);
1296 log_warning("Failed to parse priority prefix line.");
1300 s->priority_prefix = !!r;
1301 s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
1304 case STDOUT_STREAM_FORWARD_TO_SYSLOG:
1305 r = parse_boolean(p);
1307 log_warning("Failed to parse forward to syslog line.");
1311 s->forward_to_syslog = !!r;
1312 s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
1315 case STDOUT_STREAM_FORWARD_TO_KMSG:
1316 r = parse_boolean(p);
1318 log_warning("Failed to parse copy to kmsg line.");
1322 s->forward_to_kmsg = !!r;
1323 s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
1326 case STDOUT_STREAM_FORWARD_TO_CONSOLE:
1327 r = parse_boolean(p);
1329 log_warning("Failed to parse copy to console line.");
1333 s->forward_to_console = !!r;
1334 s->state = STDOUT_STREAM_RUNNING;
1337 case STDOUT_STREAM_RUNNING:
1338 return stdout_stream_log(s, p);
1341 assert_not_reached("Unknown stream state");
1344 static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
1352 remaining = s->length;
1357 end = memchr(p, '\n', remaining);
1360 else if (remaining >= sizeof(s->buffer) - 1) {
1361 end = p + sizeof(s->buffer) - 1;
1362 skip = sizeof(s->buffer) - 1;
1368 r = stdout_stream_line(s, p);
1376 if (force_flush && remaining > 0) {
1378 r = stdout_stream_line(s, p);
1386 if (p > s->buffer) {
1387 memmove(s->buffer, p, remaining);
1388 s->length = remaining;
1394 static int stdout_stream_process(StdoutStream *s) {
1400 l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
1403 if (errno == EAGAIN)
1406 log_warning("Failed to read from stream: %m");
1411 r = stdout_stream_scan(s, true);
1419 r = stdout_stream_scan(s, false);
1427 static void stdout_stream_free(StdoutStream *s) {
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);
1438 epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
1440 close_nointr_nofail(s->fd);
1447 static int stdout_stream_new(Server *s) {
1448 StdoutStream *stream;
1451 struct epoll_event ev;
1455 fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
1457 if (errno == EAGAIN)
1460 log_error("Failed to accept stdout connection: %m");
1464 if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
1465 log_warning("Too many stdout streams, refusing connection.");
1466 close_nointr_nofail(fd);
1470 stream = new0(StdoutStream, 1);
1472 log_error("Out of memory.");
1473 close_nointr_nofail(fd);
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");
1486 if (shutdown(fd, SHUT_WR) < 0) {
1487 log_error("Failed to shutdown writing side of socket: %m");
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");
1502 LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
1503 s->n_stdout_streams ++;
1508 stdout_stream_free(stream);
1512 static int system_journal_open(Server *s) {
1518 r = sd_id128_get_machine(&machine);
1522 sd_id128_to_string(machine, ids);
1524 if (!s->system_journal) {
1526 /* First try to create the machine path, but not the prefix */
1527 fn = strappend("/var/log/journal/", ids);
1530 (void) mkdir(fn, 0755);
1533 /* The create the system journal file */
1534 fn = join("/var/log/journal/", ids, "/system.journal", NULL);
1538 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
1542 journal_default_metrics(&s->system_metrics, s->system_journal->fd);
1544 s->system_journal->metrics = s->system_metrics;
1545 s->system_journal->compress = s->compress;
1547 fix_perms(s->system_journal, 0);
1550 if (r != -ENOENT && r != -EROFS)
1551 log_warning("Failed to open system journal: %s", strerror(-r));
1557 if (!s->runtime_journal) {
1559 fn = join("/run/log/journal/", ids, "/system.journal", NULL);
1563 if (s->system_journal) {
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 */
1569 r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal);
1574 log_warning("Failed to open runtime journal: %s", strerror(-r));
1581 /* OK, we really need the runtime journal, so create
1582 * it if necessary. */
1584 (void) mkdir_parents(fn, 0755);
1585 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
1589 log_error("Failed to open runtime journal: %s", strerror(-r));
1594 if (s->runtime_journal) {
1595 journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
1597 s->runtime_journal->metrics = s->runtime_metrics;
1598 s->runtime_journal->compress = s->compress;
1600 fix_perms(s->runtime_journal, 0);
1607 static int server_flush_to_var(Server *s) {
1608 char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
1617 if (!s->runtime_journal)
1620 ts = now(CLOCK_MONOTONIC);
1621 if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
1624 s->var_available_timestamp = ts;
1626 system_journal_open(s);
1628 if (!s->system_journal)
1631 r = sd_id128_get_machine(&machine);
1633 log_error("Failed to get machine id: %s", strerror(-r));
1637 r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
1639 log_error("Failed to read runtime journal: %s", strerror(-r));
1643 SD_JOURNAL_FOREACH(j) {
1646 f = j->current_file;
1647 assert(f && f->current_offset > 0);
1649 r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
1651 log_error("Can't read entry: %s", strerror(-r));
1655 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
1657 log_info("Allocation limit reached.");
1659 journal_file_post_change(s->system_journal);
1663 r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
1667 log_error("Can't write entry: %s", strerror(-r));
1673 journal_file_post_change(s->system_journal);
1675 journal_file_close(s->runtime_journal);
1676 s->runtime_journal = NULL;
1679 sd_id128_to_string(machine, path + 17);
1680 rm_rf(path, false, true, false);
1686 static int process_event(Server *s, struct epoll_event *ev) {
1689 if (ev->data.fd == s->signal_fd) {
1690 struct signalfd_siginfo sfsi;
1693 if (ev->events != EPOLLIN) {
1694 log_info("Got invalid event from epoll.");
1698 n = read(s->signal_fd, &sfsi, sizeof(sfsi));
1699 if (n != sizeof(sfsi)) {
1704 if (errno == EINTR || errno == EAGAIN)
1710 if (sfsi.ssi_signo == SIGUSR1) {
1711 server_flush_to_var(s);
1715 log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
1718 } else if (ev->data.fd == s->native_fd ||
1719 ev->data.fd == s->syslog_fd) {
1721 if (ev->events != EPOLLIN) {
1722 log_info("Got invalid event from epoll.");
1727 struct msghdr msghdr;
1729 struct ucred *ucred = NULL;
1730 struct timeval *tv = NULL;
1731 struct cmsghdr *cmsg;
1733 struct cmsghdr cmsghdr;
1734 uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
1735 CMSG_SPACE(sizeof(struct timeval))];
1740 if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
1741 log_error("SIOCINQ failed: %m");
1748 if (s->buffer_size < (size_t) v) {
1752 l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
1753 b = realloc(s->buffer, l+1);
1756 log_error("Couldn't increase buffer.");
1765 iovec.iov_base = s->buffer;
1766 iovec.iov_len = s->buffer_size;
1770 msghdr.msg_iov = &iovec;
1771 msghdr.msg_iovlen = 1;
1772 msghdr.msg_control = &control;
1773 msghdr.msg_controllen = sizeof(control);
1775 n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT);
1778 if (errno == EINTR || errno == EAGAIN)
1781 log_error("recvmsg() failed: %m");
1785 for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
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);
1797 if (ev->data.fd == s->syslog_fd) {
1800 e = memchr(s->buffer, '\n', n);
1806 process_syslog_message(s, strstrip(s->buffer), ucred, tv);
1808 process_native_message(s, s->buffer, n, ucred, tv);
1813 } else if (ev->data.fd == s->stdout_fd) {
1815 if (ev->events != EPOLLIN) {
1816 log_info("Got invalid event from epoll.");
1820 stdout_stream_new(s);
1824 StdoutStream *stream;
1826 if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
1827 log_info("Got invalid event from epoll.");
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 */
1838 stream = ev->data.ptr;
1840 if (stdout_stream_process(stream) <= 0)
1841 stdout_stream_free(stream);
1846 log_error("Unknown event.");
1850 static int open_syslog_socket(Server *s) {
1851 union sockaddr_union sa;
1853 struct epoll_event ev;
1858 if (s->syslog_fd < 0) {
1860 s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1861 if (s->syslog_fd < 0) {
1862 log_error("socket() failed: %m");
1867 sa.un.sun_family = AF_UNIX;
1868 strncpy(sa.un.sun_path, "/dev/log", sizeof(sa.un.sun_path));
1870 unlink(sa.un.sun_path);
1872 r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1874 log_error("bind() failed: %m");
1878 chmod(sa.un.sun_path, 0666);
1882 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
1884 log_error("SO_PASSCRED failed: %m");
1889 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
1891 log_error("SO_TIMESTAMP failed: %m");
1895 /* Since we use the same socket for forwarding this to some
1896 * other syslog implementation, make sure we don't hang
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");
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");
1915 static int open_native_socket(Server*s) {
1916 union sockaddr_union sa;
1918 struct epoll_event ev;
1922 if (s->native_fd < 0) {
1924 s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1925 if (s->native_fd < 0) {
1926 log_error("socket() failed: %m");
1931 sa.un.sun_family = AF_UNIX;
1932 strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
1934 unlink(sa.un.sun_path);
1936 r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1938 log_error("bind() failed: %m");
1942 chmod(sa.un.sun_path, 0666);
1946 r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
1948 log_error("SO_PASSCRED failed: %m");
1953 r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
1955 log_error("SO_TIMESTAMP failed: %m");
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");
1970 static int open_stdout_socket(Server *s) {
1971 union sockaddr_union sa;
1973 struct epoll_event ev;
1977 if (s->stdout_fd < 0) {
1979 s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
1980 if (s->stdout_fd < 0) {
1981 log_error("socket() failed: %m");
1986 sa.un.sun_family = AF_UNIX;
1987 strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
1989 unlink(sa.un.sun_path);
1991 r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1993 log_error("bind() failed: %m");
1997 chmod(sa.un.sun_path, 0666);
1999 if (listen(s->stdout_fd, SOMAXCONN) < 0) {
2000 log_error("liste() failed: %m");
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");
2016 static int open_signalfd(Server *s) {
2018 struct epoll_event ev;
2022 assert_se(sigemptyset(&mask) == 0);
2023 sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, -1);
2024 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
2026 s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
2027 if (s->signal_fd < 0) {
2028 log_error("signalfd(): %m");
2033 ev.events = EPOLLIN;
2034 ev.data.fd = s->signal_fd;
2036 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) {
2037 log_error("epoll_ctl(): %m");
2044 static int server_parse_config_file(Server *s) {
2051 fn = "/etc/systemd/systemd-journald.conf";
2052 f = fopen(fn, "re");
2054 if (errno == ENOENT)
2057 log_warning("Failed to open configuration file %s: %m", fn);
2061 r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s);
2063 log_warning("Failed to parse configuration file: %s", strerror(-r));
2070 static int server_init(Server *s) {
2076 s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
2079 s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
2080 s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
2082 s->forward_to_syslog = true;
2084 memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
2085 memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
2087 server_parse_config_file(s);
2089 s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
2090 if (!s->user_journals) {
2091 log_error("Out of memory.");
2095 s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
2096 if (s->epoll_fd < 0) {
2097 log_error("Failed to create epoll object: %m");
2101 n = sd_listen_fds(true);
2103 log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
2107 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
2109 if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) {
2111 if (s->native_fd >= 0) {
2112 log_error("Too many native sockets passed.");
2118 } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) {
2120 if (s->stdout_fd >= 0) {
2121 log_error("Too many stdout sockets passed.");
2127 } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
2129 if (s->syslog_fd >= 0) {
2130 log_error("Too many /dev/log sockets passed.");
2137 log_error("Unknown socket passed.");
2142 r = open_syslog_socket(s);
2146 r = open_native_socket(s);
2150 r = open_stdout_socket(s);
2154 r = system_journal_open(s);
2158 r = open_signalfd(s);
2162 s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst);
2169 static void server_done(Server *s) {
2173 while (s->stdout_streams)
2174 stdout_stream_free(s->stdout_streams);
2176 if (s->system_journal)
2177 journal_file_close(s->system_journal);
2179 if (s->runtime_journal)
2180 journal_file_close(s->runtime_journal);
2182 while ((f = hashmap_steal_first(s->user_journals)))
2183 journal_file_close(f);
2185 hashmap_free(s->user_journals);
2187 if (s->epoll_fd >= 0)
2188 close_nointr_nofail(s->epoll_fd);
2190 if (s->signal_fd >= 0)
2191 close_nointr_nofail(s->signal_fd);
2193 if (s->syslog_fd >= 0)
2194 close_nointr_nofail(s->syslog_fd);
2196 if (s->native_fd >= 0)
2197 close_nointr_nofail(s->native_fd);
2199 if (s->stdout_fd >= 0)
2200 close_nointr_nofail(s->stdout_fd);
2203 journal_rate_limit_free(s->rate_limit);
2208 int main(int argc, char *argv[]) {
2212 /* if (getppid() != 1) { */
2213 /* log_error("This program should be invoked by init only."); */
2214 /* return EXIT_FAILURE; */
2218 log_error("This program does not take arguments.");
2219 return EXIT_FAILURE;
2222 log_set_target(LOG_TARGET_CONSOLE);
2223 log_parse_environment();
2228 r = server_init(&server);
2232 server_vacuum(&server);
2233 server_flush_to_var(&server);
2235 log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
2236 driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
2240 "STATUS=Processing requests...");
2243 struct epoll_event event;
2245 r = epoll_wait(server.epoll_fd, &event, 1, -1);
2251 log_error("epoll_wait() failed: %m");
2257 r = process_event(&server, &event);
2264 log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
2265 driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
2269 "STATUS=Shutting down...");
2271 server_done(&server);
2273 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;