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>
35 #include "journal-file.h"
36 #include "sd-daemon.h"
37 #include "socket-util.h"
39 #include "cgroup-util.h"
42 #define USER_JOURNALS_MAX 1024
43 #define STDOUT_STREAMS_MAX 4096
45 typedef struct StdoutStream StdoutStream;
47 typedef struct Server {
54 JournalFile *runtime_journal;
55 JournalFile *system_journal;
56 Hashmap *user_journals;
63 JournalMetrics metrics;
67 LIST_HEAD(StdoutStream, stdout_streams);
68 unsigned n_stdout_streams;
71 typedef enum StdoutStreamState {
73 STDOUT_STREAM_PRIORITY,
74 STDOUT_STREAM_PRIORITY_PREFIX,
75 STDOUT_STREAM_TEE_CONSOLE,
81 StdoutStreamState state;
89 bool priority_prefix:1;
92 char buffer[LINE_MAX+1];
95 LIST_FIELDS(StdoutStream, stdout_stream);
98 static void fix_perms(JournalFile *f, uid_t uid) {
101 acl_permset_t permset;
106 r = fchmod_and_fchown(f->fd, 0640, 0, 0);
108 log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
113 acl = acl_get_fd(f->fd);
115 log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
119 r = acl_find_uid(acl, uid, &entry);
122 if (acl_create_entry(&acl, &entry) < 0 ||
123 acl_set_tag_type(entry, ACL_USER) < 0 ||
124 acl_set_qualifier(entry, &uid) < 0) {
125 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
130 if (acl_get_permset(entry, &permset) < 0 ||
131 acl_add_perm(permset, ACL_READ) < 0 ||
132 acl_calc_mask(&acl) < 0) {
133 log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
137 if (acl_set_fd(f->fd, acl) < 0)
138 log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
144 static JournalFile* find_journal(Server *s, uid_t uid) {
153 /* We split up user logs only on /var, not on /run */
154 if (!s->system_journal)
155 return s->runtime_journal;
158 return s->system_journal;
160 r = sd_id128_get_machine(&machine);
162 return s->system_journal;
164 f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
168 if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0)
169 return s->system_journal;
171 while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
172 /* Too many open? Then let's close one */
173 f = hashmap_steal_first(s->user_journals);
175 journal_file_close(f);
178 r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
182 return s->system_journal;
185 f->metrics = s->metrics;
186 f->compress = s->compress;
188 r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
190 journal_file_close(f);
191 return s->system_journal;
197 static void server_vacuum(Server *s) {
206 log_info("Rotating...");
208 if (s->runtime_journal) {
209 r = journal_file_rotate(&s->runtime_journal);
211 log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
214 if (s->system_journal) {
215 r = journal_file_rotate(&s->system_journal);
217 log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
220 HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
221 r = journal_file_rotate(&f);
223 log_error("Failed to rotate %s: %s", f->path, strerror(-r));
225 hashmap_replace(s->user_journals, k, f);
228 log_info("Vacuuming...");
230 r = sd_id128_get_machine(&machine);
232 log_error("Failed to get machine ID: %s", strerror(-r));
236 if (asprintf(&p, "/var/log/journal/%s", sd_id128_to_string(machine, ids)) < 0) {
237 log_error("Out of memory.");
241 r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
242 if (r < 0 && r != -ENOENT)
243 log_error("Failed to vacuum %s: %s", p, strerror(-r));
246 if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
247 log_error("Out of memory.");
251 r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
252 if (r < 0 && r != -ENOENT)
253 log_error("Failed to vacuum %s: %s", p, strerror(-r));
257 static void dispatch_message(Server *s, struct iovec *iovec, unsigned n, unsigned m, struct ucred *ucred, struct timeval *tv) {
258 char *pid = NULL, *uid = NULL, *gid = NULL,
259 *source_time = NULL, *boot_id = NULL, *machine_id = NULL,
260 *comm = NULL, *cmdline = NULL, *hostname = NULL,
261 *audit_session = NULL, *audit_loginuid = NULL,
262 *exe = NULL, *cgroup = NULL;
268 uid_t loginuid = 0, realuid = 0;
270 bool vacuumed = false;
273 assert(iovec || n == 0);
284 realuid = ucred->uid;
286 if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
287 IOVEC_SET_STRING(iovec[n++], pid);
289 if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
290 IOVEC_SET_STRING(iovec[n++], uid);
292 if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
293 IOVEC_SET_STRING(iovec[n++], gid);
295 r = get_process_comm(ucred->pid, &t);
297 comm = strappend("_COMM=", t);
299 IOVEC_SET_STRING(iovec[n++], comm);
303 r = get_process_exe(ucred->pid, &t);
305 exe = strappend("_EXE=", t);
307 IOVEC_SET_STRING(iovec[n++], exe);
311 r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
313 cmdline = strappend("_CMDLINE=", t);
315 IOVEC_SET_STRING(iovec[n++], cmdline);
319 r = audit_session_from_pid(ucred->pid, &session);
321 if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) session) >= 0)
322 IOVEC_SET_STRING(iovec[n++], audit_session);
324 r = audit_loginuid_from_pid(ucred->pid, &loginuid);
326 if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
327 IOVEC_SET_STRING(iovec[n++], audit_loginuid);
329 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, ucred->pid, &path);
331 cgroup = strappend("_SYSTEMD_CGROUP=", path);
333 IOVEC_SET_STRING(iovec[n++], cgroup);
339 if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
340 (unsigned long long) timeval_load(tv)) >= 0)
341 IOVEC_SET_STRING(iovec[n++], source_time);
344 /* Note that strictly speaking storing the boot id here is
345 * redundant since the entry includes this in-line
346 * anyway. However, we need this indexed, too. */
347 r = sd_id128_get_boot(&id);
349 if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
350 IOVEC_SET_STRING(iovec[n++], boot_id);
352 r = sd_id128_get_machine(&id);
354 if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
355 IOVEC_SET_STRING(iovec[n++], machine_id);
357 t = gethostname_malloc();
359 hostname = strappend("_HOSTNAME=", t);
361 IOVEC_SET_STRING(iovec[n++], hostname);
368 f = find_journal(s, realuid == 0 ? 0 : loginuid);
370 log_warning("Dropping message, as we can't find a place to store the data.");
372 r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
374 if (r == -E2BIG && !vacuumed) {
375 log_info("Allocation limit reached.");
380 log_info("Retrying write.");
385 log_error("Failed to write entry, ignoring: %s", strerror(-r));
399 free(audit_loginuid);
403 static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
404 char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
405 struct iovec iovec[16];
407 int priority = LOG_USER | LOG_INFO;
412 parse_syslog_priority((char**) &buf, &priority);
413 skip_syslog_date((char**) &buf);
415 if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
416 IOVEC_SET_STRING(iovec[n++], syslog_priority);
418 if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
419 IOVEC_SET_STRING(iovec[n++], syslog_facility);
421 message = strappend("MESSAGE=", buf);
423 IOVEC_SET_STRING(iovec[n++], message);
425 dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv);
428 free(syslog_facility);
429 free(syslog_priority);
432 static bool valid_user_field(const char *p, size_t l) {
435 /* We kinda enforce POSIX syntax recommendations for
436 environment variables here, but make a couple of additional
439 http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
441 /* No empty field names */
445 /* Don't allow names longer than 64 chars */
449 /* Variables starting with an underscore are protected */
453 /* Don't allow digits as first character */
454 if (p[0] >= '0' && p[0] <= '9')
457 /* Only allow A-Z0-9 and '_' */
458 for (a = p; a < p + l; a++)
459 if (!((*a >= 'A' && *a <= 'Z') ||
460 (*a >= '0' && *a <= '9') ||
467 static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
468 struct iovec *iovec = NULL;
469 unsigned n = 0, m = 0, j;
474 assert(buffer || n == 0);
477 remaining = buffer_size;
479 while (remaining > 0) {
482 e = memchr(p, '\n', remaining);
485 /* Trailing noise, let's ignore it, and flush what we collected */
486 log_debug("Received message with trailing noise, ignoring.");
491 /* Entry separator */
492 dispatch_message(s, iovec, n, m, ucred, tv);
500 if (*p == '.' || *p == '#') {
501 /* Ignore control commands for now, and
503 remaining -= (e - p) + 1;
508 /* A property follows */
514 u = MAX((n+13U) * 2U, 4U);
515 c = realloc(iovec, u * sizeof(struct iovec));
517 log_error("Out of memory");
525 q = memchr(p, '=', e - p);
527 if (valid_user_field(p, q - p)) {
528 /* If the field name starts with an
529 * underscore, skip the variable,
530 * since that indidates a trusted
532 iovec[n].iov_base = (char*) p;
533 iovec[n].iov_len = e - p;
537 remaining -= (e - p) + 1;
544 if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
545 log_debug("Failed to parse message, ignoring.");
549 memcpy(&l, e + 1, sizeof(uint64_t));
552 if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
553 e[1+sizeof(uint64_t)+l] != '\n') {
554 log_debug("Failed to parse message, ignoring.");
558 k = malloc((e - p) + 1 + l);
560 log_error("Out of memory");
566 memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
568 if (valid_user_field(p, e - p)) {
569 iovec[n].iov_base = k;
570 iovec[n].iov_len = (e - p) + 1 + l;
575 remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
576 p = e + 1 + sizeof(uint64_t) + l + 1;
580 dispatch_message(s, iovec, n, m, ucred, tv);
582 for (j = 0; j < n; j++)
583 if (iovec[j].iov_base < buffer ||
584 (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
585 free(iovec[j].iov_base);
588 static int stdout_stream_log(StdoutStream *s, const char *p, size_t l) {
589 struct iovec iovec[15];
590 char *message = NULL, *syslog_priority = NULL;
598 priority = s->priority;
600 if (s->priority_prefix &&
603 p[1] >= '0' && p[1] <= '7' &&
606 priority = p[1] - '0';
614 if (asprintf(&syslog_priority, "PRIORITY=%i", priority) >= 0)
615 IOVEC_SET_STRING(iovec[n++], syslog_priority);
617 tag_len = s->tag ? strlen(s->tag) + 2: 0;
618 message = malloc(8 + tag_len + l);
620 memcpy(message, "MESSAGE=", 8);
623 memcpy(message+8, s->tag, tag_len-2);
624 memcpy(message+8+tag_len-2, ": ", 2);
627 memcpy(message+8+tag_len, p, l);
628 iovec[n].iov_base = message;
629 iovec[n].iov_len = 8+tag_len+l;
633 dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL);
635 if (s->tee_console) {
638 console = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
642 IOVEC_SET_STRING(iovec[n++], s->tag);
643 IOVEC_SET_STRING(iovec[n++], ": ");
646 iovec[n].iov_base = (void*) p;
647 iovec[n].iov_len = l;
650 IOVEC_SET_STRING(iovec[n++], (char*) "\n");
652 writev(console, iovec, n);
657 free(syslog_priority);
662 static int stdout_stream_line(StdoutStream *s, const char *p, size_t l) {
666 while (l > 0 && strchr(WHITESPACE, *p)) {
671 while (l > 0 && strchr(WHITESPACE, *(p+l-1)))
676 case STDOUT_STREAM_TAG:
679 s->tag = strndup(p, l);
681 log_error("Out of memory");
686 s->state = STDOUT_STREAM_PRIORITY;
689 case STDOUT_STREAM_PRIORITY:
690 if (l != 1 || *p < '0' || *p > '7') {
691 log_warning("Failed to parse log priority line.");
695 s->priority = *p - '0';
696 s->state = STDOUT_STREAM_PRIORITY_PREFIX;
699 case STDOUT_STREAM_PRIORITY_PREFIX:
700 if (l != 1 || *p < '0' || *p > '1') {
701 log_warning("Failed to parse priority prefix line.");
705 s->priority_prefix = *p - '0';
706 s->state = STDOUT_STREAM_TEE_CONSOLE;
709 case STDOUT_STREAM_TEE_CONSOLE:
710 if (l != 1 || *p < '0' || *p > '1') {
711 log_warning("Failed to parse tee to console line.");
715 s->tee_console = *p - '0';
716 s->state = STDOUT_STREAM_RUNNING;
719 case STDOUT_STREAM_RUNNING:
720 return stdout_stream_log(s, p, l);
723 assert_not_reached("Unknown stream state");
726 static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
734 remaining = s->length;
739 end = memchr(p, '\n', remaining);
741 if (remaining >= LINE_MAX) {
749 r = stdout_stream_line(s, p, end - p);
757 if (force_flush && remaining > 0) {
758 r = stdout_stream_line(s, p, remaining);
767 memmove(s->buffer, p, remaining);
768 s->length = remaining;
774 static int stdout_stream_process(StdoutStream *s) {
780 l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
786 log_warning("Failed to read from stream: %m");
791 r = stdout_stream_scan(s, true);
799 r = stdout_stream_scan(s, false);
807 static void stdout_stream_free(StdoutStream *s) {
811 assert(s->server->n_stdout_streams > 0);
812 s->server->n_stdout_streams --;
813 LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
818 epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
820 close_nointr_nofail(s->fd);
827 static int stdout_stream_new(Server *s) {
828 StdoutStream *stream;
831 struct epoll_event ev;
835 fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
840 log_error("Failed to accept stdout connection: %m");
844 if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
845 log_warning("Too many stdout streams, refusing connection.");
846 close_nointr_nofail(fd);
850 stream = new0(StdoutStream, 1);
852 log_error("Out of memory.");
853 close_nointr_nofail(fd);
859 len = sizeof(stream->ucred);
860 if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
861 log_error("Failed to determine peer credentials: %m");
866 if (shutdown(fd, SHUT_WR) < 0) {
867 log_error("Failed to shutdown writing side of socket: %m");
873 ev.data.ptr = stream;
875 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
876 log_error("Failed to add stream to event loop: %m");
882 LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
883 s->n_stdout_streams ++;
888 stdout_stream_free(stream);
892 static int process_event(Server *s, struct epoll_event *ev) {
895 if (ev->data.fd == s->signal_fd) {
896 struct signalfd_siginfo sfsi;
899 if (ev->events != EPOLLIN) {
900 log_info("Got invalid event from epoll.");
904 n = read(s->signal_fd, &sfsi, sizeof(sfsi));
905 if (n != sizeof(sfsi)) {
910 if (errno == EINTR || errno == EAGAIN)
916 log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
919 } else if (ev->data.fd == s->native_fd ||
920 ev->data.fd == s->syslog_fd) {
922 if (ev->events != EPOLLIN) {
923 log_info("Got invalid event from epoll.");
928 struct msghdr msghdr;
930 struct ucred *ucred = NULL;
931 struct timeval *tv = NULL;
932 struct cmsghdr *cmsg;
934 struct cmsghdr cmsghdr;
935 uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
936 CMSG_SPACE(sizeof(struct timeval))];
941 if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
942 log_error("SIOCINQ failed: %m");
949 if (s->buffer_size < (size_t) v) {
953 l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
954 b = realloc(s->buffer, l+1);
957 log_error("Couldn't increase buffer.");
966 iovec.iov_base = s->buffer;
967 iovec.iov_len = s->buffer_size;
971 msghdr.msg_iov = &iovec;
972 msghdr.msg_iovlen = 1;
973 msghdr.msg_control = &control;
974 msghdr.msg_controllen = sizeof(control);
976 n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT);
979 if (errno == EINTR || errno == EAGAIN)
982 log_error("recvmsg() failed: %m");
986 for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
988 if (cmsg->cmsg_level == SOL_SOCKET &&
989 cmsg->cmsg_type == SCM_CREDENTIALS &&
990 cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
991 ucred = (struct ucred*) CMSG_DATA(cmsg);
992 else if (cmsg->cmsg_level == SOL_SOCKET &&
993 cmsg->cmsg_type == SO_TIMESTAMP &&
994 cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
995 tv = (struct timeval*) CMSG_DATA(cmsg);
998 if (ev->data.fd == s->syslog_fd) {
1001 e = memchr(s->buffer, '\n', n);
1007 process_syslog_message(s, strstrip(s->buffer), ucred, tv);
1009 process_native_message(s, s->buffer, n, ucred, tv);
1014 } else if (ev->data.fd == s->stdout_fd) {
1016 if (ev->events != EPOLLIN) {
1017 log_info("Got invalid event from epoll.");
1021 stdout_stream_new(s);
1025 StdoutStream *stream;
1027 if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
1028 log_info("Got invalid event from epoll.");
1032 /* If it is none of the well-known fds, it must be an
1033 * stdout stream fd. Note that this is a bit ugly here
1034 * (since we rely that none of the well-known fds
1035 * could be interpreted as pointer), but nonetheless
1036 * safe, since the well-known fds would never get an
1037 * fd > 4096, i.e. beyond the first memory page */
1039 stream = ev->data.ptr;
1041 if (stdout_stream_process(stream) <= 0)
1042 stdout_stream_free(stream);
1047 log_error("Unknown event.");
1051 static int system_journal_open(Server *s) {
1057 r = sd_id128_get_machine(&machine);
1061 /* First try to create the machine path, but not the prefix */
1062 fn = strappend("/var/log/journal/", sd_id128_to_string(machine, ids));
1065 (void) mkdir(fn, 0755);
1068 /* The create the system journal file */
1069 fn = join("/var/log/journal/", ids, "/system.journal", NULL);
1073 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
1077 s->system_journal->metrics = s->metrics;
1078 s->system_journal->compress = s->compress;
1080 fix_perms(s->system_journal, 0);
1084 if (r < 0 && r != -ENOENT) {
1085 log_error("Failed to open system journal: %s", strerror(-r));
1089 /* /var didn't work, so try /run, but this time we
1090 * create the prefix too */
1091 fn = join("/run/log/journal/", ids, "/system.journal", NULL);
1095 (void) mkdir_parents(fn, 0755);
1096 r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
1100 log_error("Failed to open runtime journal: %s", strerror(-r));
1104 s->runtime_journal->metrics = s->metrics;
1105 s->runtime_journal->compress = s->compress;
1107 fix_perms(s->runtime_journal, 0);
1111 static int open_syslog_socket(Server *s) {
1112 union sockaddr_union sa;
1114 struct epoll_event ev;
1118 if (s->syslog_fd < 0) {
1120 s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1121 if (s->syslog_fd < 0) {
1122 log_error("socket() failed: %m");
1127 sa.un.sun_family = AF_UNIX;
1128 strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
1130 unlink(sa.un.sun_path);
1132 r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1134 log_error("bind() failed: %m");
1138 chmod(sa.un.sun_path, 0666);
1142 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
1144 log_error("SO_PASSCRED failed: %m");
1149 r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
1151 log_error("SO_TIMESTAMP failed: %m");
1156 ev.events = EPOLLIN;
1157 ev.data.fd = s->syslog_fd;
1158 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
1159 log_error("Failed to add syslog server fd to epoll object: %m");
1166 static int open_native_socket(Server*s) {
1167 union sockaddr_union sa;
1169 struct epoll_event ev;
1173 if (s->native_fd < 0) {
1175 s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
1176 if (s->native_fd < 0) {
1177 log_error("socket() failed: %m");
1182 sa.un.sun_family = AF_UNIX;
1183 strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path));
1185 unlink(sa.un.sun_path);
1187 r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1189 log_error("bind() failed: %m");
1193 chmod(sa.un.sun_path, 0666);
1197 r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
1199 log_error("SO_PASSCRED failed: %m");
1204 r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
1206 log_error("SO_TIMESTAMP failed: %m");
1211 ev.events = EPOLLIN;
1212 ev.data.fd = s->native_fd;
1213 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
1214 log_error("Failed to add native server fd to epoll object: %m");
1221 static int open_stdout_socket(Server *s) {
1222 union sockaddr_union sa;
1224 struct epoll_event ev;
1228 if (s->stdout_fd < 0) {
1230 s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
1231 if (s->stdout_fd < 0) {
1232 log_error("socket() failed: %m");
1237 sa.un.sun_family = AF_UNIX;
1238 strncpy(sa.un.sun_path, "/run/systemd/stdout", sizeof(sa.un.sun_path));
1240 unlink(sa.un.sun_path);
1242 r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
1244 log_error("bind() failed: %m");
1248 chmod(sa.un.sun_path, 0666);
1250 if (listen(s->stdout_fd, SOMAXCONN) < 0) {
1251 log_error("liste() failed: %m");
1257 ev.events = EPOLLIN;
1258 ev.data.fd = s->stdout_fd;
1259 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) {
1260 log_error("Failed to add stdout server fd to epoll object: %m");
1267 static int open_signalfd(Server *s) {
1269 struct epoll_event ev;
1273 assert_se(sigemptyset(&mask) == 0);
1274 sigset_add_many(&mask, SIGINT, SIGTERM, -1);
1275 assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
1277 s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
1278 if (s->signal_fd < 0) {
1279 log_error("signalfd(): %m");
1284 ev.events = EPOLLIN;
1285 ev.data.fd = s->signal_fd;
1287 if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) {
1288 log_error("epoll_ctl(): %m");
1295 static int server_init(Server *s) {
1301 s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = -1;
1302 s->metrics.max_size = DEFAULT_MAX_SIZE;
1303 s->metrics.min_size = DEFAULT_MIN_SIZE;
1304 s->metrics.keep_free = DEFAULT_KEEP_FREE;
1305 s->max_use = DEFAULT_MAX_USE;
1308 s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
1309 if (!s->user_journals) {
1310 log_error("Out of memory.");
1314 s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
1315 if (s->epoll_fd < 0) {
1316 log_error("Failed to create epoll object: %m");
1320 n = sd_listen_fds(true);
1322 log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
1326 for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
1328 if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/native", 0) > 0) {
1330 if (s->native_fd >= 0) {
1331 log_error("Too many native sockets passed.");
1337 } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/stdout", 0) > 0) {
1339 if (s->stdout_fd >= 0) {
1340 log_error("Too many stdout sockets passed.");
1346 } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) {
1348 if (s->syslog_fd >= 0) {
1349 log_error("Too many /dev/log sockets passed.");
1356 log_error("Unknown socket passed.");
1361 r = open_syslog_socket(s);
1365 r = open_native_socket(s);
1369 r = open_stdout_socket(s);
1373 r = system_journal_open(s);
1377 r = open_signalfd(s);
1384 static void server_done(Server *s) {
1388 while (s->stdout_streams)
1389 stdout_stream_free(s->stdout_streams);
1391 if (s->system_journal)
1392 journal_file_close(s->system_journal);
1394 if (s->runtime_journal)
1395 journal_file_close(s->runtime_journal);
1397 while ((f = hashmap_steal_first(s->user_journals)))
1398 journal_file_close(f);
1400 hashmap_free(s->user_journals);
1402 if (s->epoll_fd >= 0)
1403 close_nointr_nofail(s->epoll_fd);
1405 if (s->signal_fd >= 0)
1406 close_nointr_nofail(s->signal_fd);
1408 if (s->syslog_fd >= 0)
1409 close_nointr_nofail(s->syslog_fd);
1411 if (s->native_fd >= 0)
1412 close_nointr_nofail(s->native_fd);
1414 if (s->stdout_fd >= 0)
1415 close_nointr_nofail(s->stdout_fd);
1418 int main(int argc, char *argv[]) {
1422 /* if (getppid() != 1) { */
1423 /* log_error("This program should be invoked by init only."); */
1424 /* return EXIT_FAILURE; */
1428 log_error("This program does not take arguments.");
1429 return EXIT_FAILURE;
1432 log_set_target(LOG_TARGET_CONSOLE);
1433 log_set_max_level(LOG_DEBUG);
1434 log_parse_environment();
1439 r = server_init(&server);
1443 log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
1447 "STATUS=Processing requests...");
1450 struct epoll_event event;
1452 r = epoll_wait(server.epoll_fd, &event, 1, -1);
1458 log_error("epoll_wait() failed: %m");
1464 r = process_event(&server, &event);
1471 log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
1475 "STATUS=Shutting down...");
1477 server_done(&server);
1479 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;