+ free(cgroup);
+ free(session);
+ free(owner_uid);
+ free(unit);
+}
+
+static void driver_message(Server *s, sd_id128_t message_id, const char *format, ...) {
+ char mid[11 + 32 + 1];
+ char buffer[16 + LINE_MAX + 1];
+ struct iovec iovec[N_IOVEC_META_FIELDS + 4];
+ int n = 0;
+ va_list ap;
+ struct ucred ucred;
+
+ assert(s);
+ assert(format);
+
+ IOVEC_SET_STRING(iovec[n++], "PRIORITY=5");
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver");
+
+ memcpy(buffer, "MESSAGE=", 8);
+ va_start(ap, format);
+ vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap);
+ va_end(ap);
+ char_array_0(buffer);
+ IOVEC_SET_STRING(iovec[n++], buffer);
+
+ snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id));
+ char_array_0(mid);
+ IOVEC_SET_STRING(iovec[n++], mid);
+
+ zero(ucred);
+ ucred.pid = getpid();
+ ucred.uid = getuid();
+ ucred.gid = getgid();
+
+ dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL);
+}
+
+static void dispatch_message(Server *s,
+ struct iovec *iovec, unsigned n, unsigned m,
+ struct ucred *ucred,
+ struct timeval *tv,
+ int priority) {
+ int rl;
+ char *path = NULL, *c;
+
+ assert(s);
+ assert(iovec || n == 0);
+
+ if (n == 0)
+ return;
+
+ if (!ucred)
+ goto finish;
+
+ path = shortened_cgroup_path(ucred->pid);
+ if (!path)
+ goto finish;
+
+ /* example: /user/lennart/3/foobar
+ * /system/dbus.service/foobar
+ *
+ * So let's cut of everything past the third /, since that is
+ * wher user directories start */
+
+ c = strchr(path, '/');
+ if (c) {
+ c = strchr(c+1, '/');
+ if (c) {
+ c = strchr(c+1, '/');
+ if (c)
+ *c = 0;
+ }
+ }
+
+ rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available_space(s));
+
+ if (rl == 0) {
+ free(path);
+ return;
+ }
+
+ /* Write a suppression message if we suppressed something */
+ if (rl > 1)
+ driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path);
+
+ free(path);
+
+finish:
+ dispatch_message_real(s, iovec, n, m, ucred, tv);
+}
+
+static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, struct ucred *ucred, struct timeval *tv) {
+ struct msghdr msghdr;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
+ } control;
+ union sockaddr_union sa;
+
+ assert(s);
+ assert(iovec);
+ assert(n_iovec > 0);
+
+ zero(msghdr);
+ msghdr.msg_iov = (struct iovec*) iovec;
+ msghdr.msg_iovlen = n_iovec;
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/journal/syslog", sizeof(sa.un.sun_path));
+ msghdr.msg_name = &sa;
+ msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
+
+ if (ucred) {
+ zero(control);
+ msghdr.msg_control = &control;
+ msghdr.msg_controllen = sizeof(control);
+
+ cmsg = CMSG_FIRSTHDR(&msghdr);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_CREDENTIALS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
+ memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
+ msghdr.msg_controllen = cmsg->cmsg_len;
+ }
+
+ /* Forward the syslog message we received via /dev/log to
+ * /run/systemd/syslog. Unfortunately we currently can't set
+ * the SO_TIMESTAMP auxiliary data, and hence we don't. */
+
+ if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
+ return;
+
+ if (ucred && errno == ESRCH) {
+ struct ucred u;
+
+ /* Hmm, presumably the sender process vanished
+ * by now, so let's fix it as good as we
+ * can, and retry */
+
+ u = *ucred;
+ u.pid = getpid();
+ memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
+
+ if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
+ return;
+ }
+
+ log_debug("Failed to forward syslog message: %m");
+}
+
+static void forward_syslog_raw(Server *s, const char *buffer, struct ucred *ucred, struct timeval *tv) {
+ struct iovec iovec;
+
+ assert(s);
+ assert(buffer);
+
+ IOVEC_SET_STRING(iovec, buffer);
+ forward_syslog_iovec(s, &iovec, 1, ucred, tv);
+}
+
+static void forward_syslog(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred, struct timeval *tv) {
+ struct iovec iovec[5];
+ char header_priority[6], header_time[64], header_pid[16];
+ int n = 0;
+ time_t t;
+ struct tm *tm;
+ char *ident_buf = NULL;
+
+ assert(s);
+ assert(priority >= 0);
+ assert(priority <= 999);
+ assert(message);
+
+ /* First: priority field */
+ snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
+ char_array_0(header_priority);
+ IOVEC_SET_STRING(iovec[n++], header_priority);
+
+ /* Second: timestamp */
+ t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC));
+ tm = localtime(&t);
+ if (!tm)
+ return;
+ if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
+ return;
+ IOVEC_SET_STRING(iovec[n++], header_time);
+
+ /* Third: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Fourth: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ forward_syslog_iovec(s, iovec, n, ucred, tv);
+
+ free(ident_buf);
+}
+
+static int fixup_priority(int priority) {
+
+ if ((priority & LOG_FACMASK) == 0)
+ return (priority & LOG_PRIMASK) | LOG_USER;
+
+ return priority;
+}
+
+static void forward_kmsg(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) {
+ struct iovec iovec[5];
+ char header_priority[6], header_pid[16];
+ int n = 0;
+ char *ident_buf = NULL;
+ int fd;
+
+ assert(s);
+ assert(priority >= 0);
+ assert(priority <= 999);
+ assert(message);
+
+ /* Never allow messages with kernel facility to be written to
+ * kmsg, regardless where the data comes from. */
+ priority = fixup_priority(priority);
+
+ /* First: priority field */
+ snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
+ char_array_0(header_priority);
+ IOVEC_SET_STRING(iovec[n++], header_priority);
+
+ /* Second: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Fourth: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+ IOVEC_SET_STRING(iovec[n++], "\n");
+
+ fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0) {
+ log_debug("Failed to open /dev/kmsg for logging: %s", strerror(errno));
+ goto finish;
+ }
+
+ if (writev(fd, iovec, n) < 0)
+ log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
+
+ close_nointr_nofail(fd);
+
+finish:
+ free(ident_buf);
+}
+
+static void forward_console(Server *s, const char *identifier, const char *message, struct ucred *ucred) {
+ struct iovec iovec[4];
+ char header_pid[16];
+ int n = 0, fd;
+ char *ident_buf = NULL;
+
+ assert(s);
+ assert(message);
+
+ /* First: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Third: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+ IOVEC_SET_STRING(iovec[n++], "\n");
+
+ fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0) {
+ log_debug("Failed to open /dev/console for logging: %s", strerror(errno));
+ goto finish;
+ }
+
+ if (writev(fd, iovec, n) < 0)
+ log_debug("Failed to write to /dev/console for logging: %s", strerror(errno));
+
+ close_nointr_nofail(fd);
+
+finish:
+ free(ident_buf);
+}
+
+static void read_identifier(const char **buf, char **identifier) {
+ const char *p;
+ char *t;
+ size_t l, e;
+
+ assert(buf);
+ assert(identifier);
+
+ p = *buf;
+
+ p += strspn(p, WHITESPACE);
+ l = strcspn(p, WHITESPACE);
+
+ if (l <= 0 ||
+ p[l-1] != ':')
+ return;
+
+ e = l;
+ l--;
+
+ if (p[l-1] == ']') {
+ size_t k = l-1;
+
+ for (;;) {
+
+ if (p[k] == '[') {
+ l = k;
+ break;
+ }
+
+ if (k == 0)
+ break;
+
+ k--;
+ }
+ }
+
+ t = strndup(p, l);
+ if (t)
+ *identifier = t;
+
+ *buf = p + e;
+ *buf += strspn(*buf, WHITESPACE);
+}
+
+static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
+ struct iovec iovec[N_IOVEC_META_FIELDS + 5];
+ unsigned n = 0;
+ int priority = LOG_USER | LOG_INFO;
+ char *identifier = NULL;
+
+ assert(s);
+ assert(buf);
+
+ if (s->forward_to_syslog)
+ forward_syslog_raw(s, buf, ucred, tv);
+
+ parse_syslog_priority((char**) &buf, &priority);
+ skip_syslog_date((char**) &buf);
+ read_identifier(&buf, &identifier);
+
+ if (s->forward_to_kmsg)
+ forward_kmsg(s, priority, identifier, buf, ucred);
+
+ if (s->forward_to_console)
+ forward_console(s, identifier, buf, ucred);
+
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog");
+
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
+
+ if (priority & LOG_FACMASK)
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
+ if (identifier) {
+ syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
+ if (syslog_identifier)
+ IOVEC_SET_STRING(iovec[n++], syslog_identifier);
+ }
+
+ message = strappend("MESSAGE=", buf);
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, priority);
+
+ free(message);
+ free(identifier);
+ free(syslog_priority);
+ free(syslog_facility);
+ free(syslog_identifier);
+}
+
+static bool valid_user_field(const char *p, size_t l) {
+ const char *a;
+
+ /* We kinda enforce POSIX syntax recommendations for
+ environment variables here, but make a couple of additional
+ requirements.
+
+ http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
+
+ /* No empty field names */
+ if (l <= 0)
+ return false;
+
+ /* Don't allow names longer than 64 chars */
+ if (l > 64)
+ return false;
+
+ /* Variables starting with an underscore are protected */
+ if (p[0] == '_')
+ return false;
+
+ /* Don't allow digits as first character */
+ if (p[0] >= '0' && p[0] <= '9')
+ return false;
+
+ /* Only allow A-Z0-9 and '_' */
+ for (a = p; a < p + l; a++)
+ if (!((*a >= 'A' && *a <= 'Z') ||
+ (*a >= '0' && *a <= '9') ||
+ *a == '_'))
+ return false;
+
+ return true;
+}
+
+static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
+ struct iovec *iovec = NULL;
+ unsigned n = 0, m = 0, j, tn = (unsigned) -1;
+ const char *p;
+ size_t remaining;
+ int priority = LOG_INFO;
+ char *identifier = NULL, *message = NULL;
+
+ assert(s);
+ assert(buffer || n == 0);
+
+ p = buffer;
+ remaining = buffer_size;
+
+ while (remaining > 0) {
+ const char *e, *q;
+
+ e = memchr(p, '\n', remaining);
+
+ if (!e) {
+ /* Trailing noise, let's ignore it, and flush what we collected */
+ log_debug("Received message with trailing noise, ignoring.");
+ break;
+ }
+
+ if (e == p) {
+ /* Entry separator */
+ dispatch_message(s, iovec, n, m, ucred, tv, priority);
+ n = 0;
+ priority = LOG_INFO;
+
+ p++;
+ remaining--;
+ continue;
+ }
+
+ if (*p == '.' || *p == '#') {
+ /* Ignore control commands for now, and
+ * comments too. */
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ }
+
+ /* A property follows */
+
+ if (n+N_IOVEC_META_FIELDS >= m) {
+ struct iovec *c;
+ unsigned u;
+
+ u = MAX((n+N_IOVEC_META_FIELDS+1) * 2U, 4U);
+ c = realloc(iovec, u * sizeof(struct iovec));
+ if (!c) {
+ log_error("Out of memory");
+ break;
+ }
+
+ iovec = c;
+ m = u;
+ }
+
+ q = memchr(p, '=', e - p);
+ if (q) {
+ if (valid_user_field(p, q - p)) {
+ size_t l;
+
+ l = e - p;
+
+ /* If the field name starts with an
+ * underscore, skip the variable,
+ * since that indidates a trusted
+ * field */
+ iovec[n].iov_base = (char*) p;
+ iovec[n].iov_len = l;
+ n++;
+
+ /* We need to determine the priority
+ * of this entry for the rate limiting
+ * logic */
+ if (l == 10 &&
+ memcmp(p, "PRIORITY=", 9) == 0 &&
+ p[9] >= '0' && p[9] <= '9')
+ priority = (priority & LOG_FACMASK) | (p[9] - '0');
+
+ else if (l == 17 &&
+ memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
+ p[16] >= '0' && p[16] <= '9')
+ priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
+
+ else if (l == 18 &&
+ memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
+ p[16] >= '0' && p[16] <= '9' &&
+ p[17] >= '0' && p[17] <= '9')
+ priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
+
+ else if (l >= 12 &&
+ memcmp(p, "SYSLOG_IDENTIFIER=", 11) == 0) {
+ char *t;
+
+ t = strndup(p + 11, l - 11);
+ if (t) {
+ free(identifier);
+ identifier = t;
+ }
+ } else if (l >= 8 &&
+ memcmp(p, "MESSAGE=", 8) == 0) {
+ char *t;
+
+ t = strndup(p + 8, l - 8);
+ if (t) {
+ free(message);
+ message = t;
+ }
+ }
+ }
+
+ remaining -= (e - p) + 1;
+ p = e + 1;
+ continue;
+ } else {
+ uint64_t l;
+ char *k;
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ memcpy(&l, e + 1, sizeof(uint64_t));
+ l = le64toh(l);
+
+ if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
+ e[1+sizeof(uint64_t)+l] != '\n') {
+ log_debug("Failed to parse message, ignoring.");
+ break;
+ }
+
+ k = malloc((e - p) + 1 + l);
+ if (!k) {
+ log_error("Out of memory");
+ break;
+ }
+
+ memcpy(k, p, e - p);
+ k[e - p] = '=';
+ memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
+
+ if (valid_user_field(p, e - p)) {
+ iovec[n].iov_base = k;
+ iovec[n].iov_len = (e - p) + 1 + l;
+ n++;
+ } else
+ free(k);
+
+ remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
+ p = e + 1 + sizeof(uint64_t) + l + 1;
+ }
+ }
+
+ if (n <= 0)
+ goto finish;
+
+ tn = n++;
+ IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
+
+ if (message) {
+ if (s->forward_to_syslog)
+ forward_syslog(s, priority, identifier, message, ucred, tv);
+
+ if (s->forward_to_kmsg)
+ forward_kmsg(s, priority, identifier, message, ucred);
+
+ if (s->forward_to_console)
+ forward_console(s, identifier, message, ucred);
+ }
+
+ dispatch_message(s, iovec, n, m, ucred, tv, priority);
+
+finish:
+ for (j = 0; j < n; j++) {
+ if (j == tn)
+ continue;
+
+ if (iovec[j].iov_base < buffer ||
+ (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
+ free(iovec[j].iov_base);
+ }
+
+ free(identifier);
+ free(message);
+}
+
+static int stdout_stream_log(StdoutStream *s, const char *p) {
+ struct iovec iovec[N_IOVEC_META_FIELDS + 5];
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
+ unsigned n = 0;
+ int priority;
+
+ assert(s);
+ assert(p);
+
+ priority = s->priority;
+
+ if (s->level_prefix)
+ parse_syslog_priority((char**) &p, &priority);
+
+ if (s->forward_to_syslog || s->server->forward_to_syslog)
+ forward_syslog(s->server, fixup_priority(priority), s->identifier, p, &s->ucred, NULL);
+
+ if (s->forward_to_kmsg || s->server->forward_to_kmsg)
+ forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
+
+ if (s->forward_to_console || s->server->forward_to_console)
+ forward_console(s->server, s->identifier, p, &s->ucred);
+
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
+
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
+
+ if (priority & LOG_FACMASK)
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
+ if (s->identifier) {
+ syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
+ if (syslog_identifier)
+ IOVEC_SET_STRING(iovec[n++], syslog_identifier);
+ }
+
+ message = strappend("MESSAGE=", p);
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority);
+
+ free(message);
+ free(syslog_priority);
+ free(syslog_facility);
+ free(syslog_identifier);
+
+ return 0;
+}
+
+static int stdout_stream_line(StdoutStream *s, char *p) {
+ int r;
+
+ assert(s);
+ assert(p);
+
+ p = strstrip(p);
+
+ switch (s->state) {
+
+ case STDOUT_STREAM_IDENTIFIER:
+ s->identifier = strdup(p);
+ if (!s->identifier) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ s->state = STDOUT_STREAM_PRIORITY;
+ return 0;
+
+ case STDOUT_STREAM_PRIORITY:
+ r = safe_atoi(p, &s->priority);
+ if (r < 0 || s->priority <= 0 || s->priority >= 999) {
+ log_warning("Failed to parse log priority line.");
+ return -EINVAL;
+ }
+
+ s->state = STDOUT_STREAM_LEVEL_PREFIX;
+ return 0;
+
+ case STDOUT_STREAM_LEVEL_PREFIX:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse level prefix line.");
+ return -EINVAL;
+ }
+
+ s->level_prefix = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
+ return 0;
+
+ case STDOUT_STREAM_FORWARD_TO_SYSLOG:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse forward to syslog line.");
+ return -EINVAL;
+ }
+
+ s->forward_to_syslog = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
+ return 0;
+
+ case STDOUT_STREAM_FORWARD_TO_KMSG:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse copy to kmsg line.");
+ return -EINVAL;
+ }
+
+ s->forward_to_kmsg = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
+ return 0;
+
+ case STDOUT_STREAM_FORWARD_TO_CONSOLE:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse copy to console line.");
+ return -EINVAL;
+ }
+
+ s->forward_to_console = !!r;
+ s->state = STDOUT_STREAM_RUNNING;
+ return 0;
+
+ case STDOUT_STREAM_RUNNING:
+ return stdout_stream_log(s, p);
+ }
+
+ assert_not_reached("Unknown stream state");
+}
+
+static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
+ char *p;
+ size_t remaining;
+ int r;
+
+ assert(s);
+
+ p = s->buffer;
+ remaining = s->length;
+ for (;;) {
+ char *end;
+ size_t skip;
+
+ end = memchr(p, '\n', remaining);
+ if (end)
+ skip = end - p + 1;
+ else if (remaining >= sizeof(s->buffer) - 1) {
+ end = p + sizeof(s->buffer) - 1;
+ skip = sizeof(s->buffer) - 1;
+ } else
+ break;
+
+ *end = 0;
+
+ r = stdout_stream_line(s, p);
+ if (r < 0)
+ return r;
+
+ remaining -= skip;
+ p += skip;
+ }
+
+ if (force_flush && remaining > 0) {
+ p[remaining] = 0;
+ r = stdout_stream_line(s, p);
+ if (r < 0)
+ return r;
+
+ p += remaining;
+ remaining = 0;
+ }
+
+ if (p > s->buffer) {
+ memmove(s->buffer, p, remaining);
+ s->length = remaining;
+ }
+
+ return 0;
+}
+
+static int stdout_stream_process(StdoutStream *s) {
+ ssize_t l;
+ int r;
+
+ assert(s);
+
+ l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
+ if (l < 0) {
+
+ if (errno == EAGAIN)
+ return 0;
+
+ log_warning("Failed to read from stream: %m");
+ return -errno;
+ }
+
+ if (l == 0) {
+ r = stdout_stream_scan(s, true);
+ if (r < 0)
+ return r;
+
+ return 0;
+ }
+
+ s->length += l;
+ r = stdout_stream_scan(s, false);
+ if (r < 0)
+ return r;
+
+ return 1;
+
+}
+
+static void stdout_stream_free(StdoutStream *s) {
+ assert(s);
+
+ if (s->server) {
+ assert(s->server->n_stdout_streams > 0);
+ s->server->n_stdout_streams --;
+ LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
+ }
+
+ if (s->fd >= 0) {
+ if (s->server)
+ epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
+
+ close_nointr_nofail(s->fd);
+ }
+
+ free(s->identifier);
+ free(s);
+}
+
+static int stdout_stream_new(Server *s) {
+ StdoutStream *stream;
+ int fd, r;
+ socklen_t len;
+ struct epoll_event ev;
+
+ assert(s);
+
+ fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
+ if (fd < 0) {
+ if (errno == EAGAIN)
+ return 0;
+
+ log_error("Failed to accept stdout connection: %m");
+ return -errno;
+ }
+
+ if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
+ log_warning("Too many stdout streams, refusing connection.");
+ close_nointr_nofail(fd);
+ return 0;
+ }
+
+ stream = new0(StdoutStream, 1);
+ if (!stream) {
+ log_error("Out of memory.");
+ close_nointr_nofail(fd);
+ return -ENOMEM;
+ }
+
+ stream->fd = fd;
+
+ len = sizeof(stream->ucred);
+ if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
+ log_error("Failed to determine peer credentials: %m");
+ r = -errno;
+ goto fail;
+ }
+
+ if (shutdown(fd, SHUT_WR) < 0) {
+ log_error("Failed to shutdown writing side of socket: %m");
+ r = -errno;
+ goto fail;
+ }
+
+ zero(ev);
+ ev.data.ptr = stream;
+ ev.events = EPOLLIN;
+ if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
+ log_error("Failed to add stream to event loop: %m");
+ r = -errno;
+ goto fail;
+ }
+
+ stream->server = s;
+ LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
+ s->n_stdout_streams ++;
+
+ return 0;
+
+fail:
+ stdout_stream_free(stream);
+ return r;
+}
+
+static int system_journal_open(Server *s) {
+ int r;
+ char *fn;
+ sd_id128_t machine;
+ char ids[33];
+
+ r = sd_id128_get_machine(&machine);
+ if (r < 0)
+ return r;
+
+ sd_id128_to_string(machine, ids);
+
+ if (!s->system_journal) {
+
+ /* First try to create the machine path, but not the prefix */
+ fn = strappend("/var/log/journal/", ids);
+ if (!fn)
+ return -ENOMEM;
+ (void) mkdir(fn, 0755);
+ free(fn);
+
+ /* The create the system journal file */
+ fn = join("/var/log/journal/", ids, "/system.journal", NULL);
+ if (!fn)
+ return -ENOMEM;
+
+ r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
+ free(fn);
+
+ if (r >= 0) {
+ journal_default_metrics(&s->system_metrics, s->system_journal->fd);
+
+ s->system_journal->metrics = s->system_metrics;
+ s->system_journal->compress = s->compress;
+
+ fix_perms(s->system_journal, 0);
+ } else if (r < 0) {
+
+ if (r != -ENOENT && r != -EROFS)
+ log_warning("Failed to open system journal: %s", strerror(-r));
+
+ r = 0;
+ }
+ }
+
+ if (!s->runtime_journal) {
+
+ fn = join("/run/log/journal/", ids, "/system.journal", NULL);
+ if (!fn)
+ return -ENOMEM;
+
+ if (s->system_journal) {
+
+ /* Try to open the runtime journal, but only
+ * if it already exists, so that we can flush
+ * it into the system journal */
+
+ r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal);
+ free(fn);
+
+ if (r < 0) {
+ if (r != -ENOENT)
+ log_warning("Failed to open runtime journal: %s", strerror(-r));
+
+ r = 0;
+ }
+
+ } else {
+
+ /* OK, we really need the runtime journal, so create
+ * it if necessary. */
+
+ (void) mkdir_parents(fn, 0755);
+ r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
+ free(fn);
+
+ if (r < 0) {
+ log_error("Failed to open runtime journal: %s", strerror(-r));
+ return r;
+ }
+ }
+
+ if (s->runtime_journal) {
+ journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
+
+ s->runtime_journal->metrics = s->runtime_metrics;
+ s->runtime_journal->compress = s->compress;
+
+ fix_perms(s->runtime_journal, 0);
+ }
+ }
+
+ return r;
+}
+
+static int server_flush_to_var(Server *s) {
+ char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
+ Object *o = NULL;
+ int r;
+ sd_id128_t machine;
+ sd_journal *j;
+ usec_t ts;
+
+ assert(s);
+
+ if (!s->runtime_journal)
+ return 0;
+
+ ts = now(CLOCK_MONOTONIC);
+ if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
+ return 0;
+
+ s->var_available_timestamp = ts;
+
+ system_journal_open(s);
+
+ if (!s->system_journal)
+ return 0;
+
+ r = sd_id128_get_machine(&machine);
+ if (r < 0) {
+ log_error("Failed to get machine id: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
+ if (r < 0) {
+ log_error("Failed to read runtime journal: %s", strerror(-r));
+ return r;
+ }
+
+ SD_JOURNAL_FOREACH(j) {
+ JournalFile *f;
+
+ f = j->current_file;
+ assert(f && f->current_offset > 0);
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
+ if (r < 0) {
+ log_error("Can't read entry: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
+ if (r == -E2BIG) {
+ log_info("Allocation limit reached.");
+
+ journal_file_post_change(s->system_journal);
+ server_rotate(s);
+ server_vacuum(s);
+
+ r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
+ }
+
+ if (r < 0) {
+ log_error("Can't write entry: %s", strerror(-r));
+ goto finish;
+ }
+ }
+
+finish:
+ journal_file_post_change(s->system_journal);
+
+ journal_file_close(s->runtime_journal);
+ s->runtime_journal = NULL;
+
+ if (r >= 0) {
+ sd_id128_to_string(machine, path + 17);
+ rm_rf(path, false, true, false);
+ }
+
+ return r;