./tools/notsd-move

1 files changed, 2007 insertions, 0 deletions

diff --git a/src/grp-journal/libjournal-core/journald-server.c b/src/grp-journal/libjournal-core/journald-server.c
new file mode 100644
index 0000000000..8f82d2a838
--- /dev/null
+++ b/src/grp-journal/libjournal-core/journald-server.c
@@ -0,0 +1,2007 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2011 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/signalfd.h>
+#include <sys/statvfs.h>
+#include <linux/sockios.h>
+
+#include "libudev.h"
+#include "sd-daemon.h"
+#include "sd-journal.h"
+#include "sd-messages.h"
+
+#include "acl-util.h"
+#include "alloc-util.h"
+#include "audit-util.h"
+#include "cgroup-util.h"
+#include "conf-parser.h"
+#include "dirent-util.h"
+#include "extract-word.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "formats-util.h"
+#include "fs-util.h"
+#include "hashmap.h"
+#include "hostname-util.h"
+#include "io-util.h"
+#include "journal-authenticate.h"
+#include "journal-file.h"
+#include "journal-internal.h"
+#include "journal-vacuum.h"
+#include "journald-audit.h"
+#include "journald-kmsg.h"
+#include "journald-native.h"
+#include "journald-rate-limit.h"
+#include "journald-server.h"
+#include "journald-stream.h"
+#include "journald-syslog.h"
+#include "missing.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "proc-cmdline.h"
+#include "process-util.h"
+#include "rm-rf.h"
+#include "selinux-util.h"
+#include "signal-util.h"
+#include "socket-util.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "user-util.h"
+#include "log.h"
+
+#define USER_JOURNALS_MAX 1024
+
+#define DEFAULT_SYNC_INTERVAL_USEC (5*USEC_PER_MINUTE)
+#define DEFAULT_RATE_LIMIT_INTERVAL (30*USEC_PER_SEC)
+#define DEFAULT_RATE_LIMIT_BURST 1000
+#define DEFAULT_MAX_FILE_USEC USEC_PER_MONTH
+
+#define RECHECK_SPACE_USEC (30*USEC_PER_SEC)
+
+#define NOTIFY_SNDBUF_SIZE (8*1024*1024)
+
+/* The period to insert between posting changes for coalescing */
+#define POST_CHANGE_TIMER_INTERVAL_USEC (250*USEC_PER_MSEC)
+
+static int determine_space_for(
+                Server *s,
+                JournalMetrics *metrics,
+                const char *path,
+                const char *name,
+                bool verbose,
+                bool patch_min_use,
+                uint64_t *available,
+                uint64_t *limit) {
+
+        uint64_t sum = 0, ss_avail, avail;
+        _cleanup_closedir_ DIR *d = NULL;
+        struct dirent *de;
+        struct statvfs ss;
+        const char *p;
+        usec_t ts;
+
+        assert(s);
+        assert(metrics);
+        assert(path);
+        assert(name);
+
+        ts = now(CLOCK_MONOTONIC);
+
+        if (!verbose && s->cached_space_timestamp + RECHECK_SPACE_USEC > ts) {
+
+                if (available)
+                        *available = s->cached_space_available;
+                if (limit)
+                        *limit = s->cached_space_limit;
+
+                return 0;
+        }
+
+        p = strjoina(path, SERVER_MACHINE_ID(s));
+        d = opendir(p);
+        if (!d)
+                return log_full_errno(errno == ENOENT ? LOG_DEBUG : LOG_ERR, errno, "Failed to open %s: %m", p);
+
+        if (fstatvfs(dirfd(d), &ss) < 0)
+                return log_error_errno(errno, "Failed to fstatvfs(%s): %m", p);
+
+        FOREACH_DIRENT_ALL(de, d, break) {
+                struct stat st;
+
+                if (!endswith(de->d_name, ".journal") &&
+                    !endswith(de->d_name, ".journal~"))
+                        continue;
+
+                if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
+                        log_debug_errno(errno, "Failed to stat %s/%s, ignoring: %m", p, de->d_name);
+                        continue;
+                }
+
+                if (!S_ISREG(st.st_mode))
+                        continue;
+
+                sum += (uint64_t) st.st_blocks * 512UL;
+        }
+
+        /* If requested, then let's bump the min_use limit to the
+         * current usage on disk. We do this when starting up and
+         * first opening the journal files. This way sudden spikes in
+         * disk usage will not cause journald to vacuum files without
+         * bounds. Note that this means that only a restart of
+         * journald will make it reset this value. */
+
+        if (patch_min_use)
+                metrics->min_use = MAX(metrics->min_use, sum);
+
+        ss_avail = ss.f_bsize * ss.f_bavail;
+        avail = LESS_BY(ss_avail, metrics->keep_free);
+
+        s->cached_space_limit = MIN(MAX(sum + avail, metrics->min_use), metrics->max_use);
+        s->cached_space_available = LESS_BY(s->cached_space_limit, sum);
+        s->cached_space_timestamp = ts;
+
+        if (verbose) {
+                char    fb1[FORMAT_BYTES_MAX], fb2[FORMAT_BYTES_MAX], fb3[FORMAT_BYTES_MAX],
+                        fb4[FORMAT_BYTES_MAX], fb5[FORMAT_BYTES_MAX], fb6[FORMAT_BYTES_MAX];
+                format_bytes(fb1, sizeof(fb1), sum);
+                format_bytes(fb2, sizeof(fb2), metrics->max_use);
+                format_bytes(fb3, sizeof(fb3), metrics->keep_free);
+                format_bytes(fb4, sizeof(fb4), ss_avail);
+                format_bytes(fb5, sizeof(fb5), s->cached_space_limit);
+                format_bytes(fb6, sizeof(fb6), s->cached_space_available);
+
+                server_driver_message(s, SD_MESSAGE_JOURNAL_USAGE,
+                                      LOG_MESSAGE("%s (%s) is %s, max %s, %s free.",
+                                                  name, path, fb1, fb5, fb6),
+                                      "JOURNAL_NAME=%s", name,
+                                      "JOURNAL_PATH=%s", path,
+                                      "CURRENT_USE=%"PRIu64, sum,
+                                      "CURRENT_USE_PRETTY=%s", fb1,
+                                      "MAX_USE=%"PRIu64, metrics->max_use,
+                                      "MAX_USE_PRETTY=%s", fb2,
+                                      "DISK_KEEP_FREE=%"PRIu64, metrics->keep_free,
+                                      "DISK_KEEP_FREE_PRETTY=%s", fb3,
+                                      "DISK_AVAILABLE=%"PRIu64, ss_avail,
+                                      "DISK_AVAILABLE_PRETTY=%s", fb4,
+                                      "LIMIT=%"PRIu64, s->cached_space_limit,
+                                      "LIMIT_PRETTY=%s", fb5,
+                                      "AVAILABLE=%"PRIu64, s->cached_space_available,
+                                      "AVAILABLE_PRETTY=%s", fb6,
+                                      NULL);
+        }
+
+        if (available)
+                *available = s->cached_space_available;
+        if (limit)
+                *limit = s->cached_space_limit;
+
+        return 1;
+}
+
+static int determine_space(Server *s, bool verbose, bool patch_min_use, uint64_t *available, uint64_t *limit) {
+        JournalMetrics *metrics;
+        const char *path, *name;
+
+        assert(s);
+
+        if (s->system_journal) {
+                path = "/var/log/journal/";
+                metrics = &s->system_metrics;
+                name = "System journal";
+        } else {
+                path = "/run/log/journal/";
+                metrics = &s->runtime_metrics;
+                name = "Runtime journal";
+        }
+
+        return determine_space_for(s, metrics, path, name, verbose, patch_min_use, available, limit);
+}
+
+static void server_add_acls(JournalFile *f, uid_t uid) {
+#ifdef HAVE_ACL
+        int r;
+#endif
+        assert(f);
+
+#ifdef HAVE_ACL
+        if (uid <= SYSTEM_UID_MAX)
+                return;
+
+        r = add_acls_for_user(f->fd, uid);
+        if (r < 0)
+                log_warning_errno(r, "Failed to set ACL on %s, ignoring: %m", f->path);
+#endif
+}
+
+static int open_journal(
+                Server *s,
+                bool reliably,
+                const char *fname,
+                int flags,
+                bool seal,
+                JournalMetrics *metrics,
+                JournalFile **ret) {
+        int r;
+        JournalFile *f;
+
+        assert(s);
+        assert(fname);
+        assert(ret);
+
+        if (reliably)
+                r = journal_file_open_reliably(fname, flags, 0640, s->compress, seal, metrics, s->mmap, s->deferred_closes, NULL, &f);
+        else
+                r = journal_file_open(-1, fname, flags, 0640, s->compress, seal, metrics, s->mmap, s->deferred_closes, NULL, &f);
+        if (r < 0)
+                return r;
+
+        r = journal_file_enable_post_change_timer(f, s->event, POST_CHANGE_TIMER_INTERVAL_USEC);
+        if (r < 0) {
+                (void) journal_file_close(f);
+                return r;
+        }
+
+        *ret = f;
+        return r;
+}
+
+static JournalFile* find_journal(Server *s, uid_t uid) {
+        _cleanup_free_ char *p = NULL;
+        int r;
+        JournalFile *f;
+        sd_id128_t machine;
+
+        assert(s);
+
+        /* We split up user logs only on /var, not on /run. If the
+         * runtime file is open, we write to it exclusively, in order
+         * to guarantee proper order as soon as we flush /run to
+         * /var and close the runtime file. */
+
+        if (s->runtime_journal)
+                return s->runtime_journal;
+
+        if (uid <= SYSTEM_UID_MAX)
+                return s->system_journal;
+
+        r = sd_id128_get_machine(&machine);
+        if (r < 0)
+                return s->system_journal;
+
+        f = ordered_hashmap_get(s->user_journals, UID_TO_PTR(uid));
+        if (f)
+                return f;
+
+        if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/user-"UID_FMT".journal",
+                     SD_ID128_FORMAT_VAL(machine), uid) < 0)
+                return s->system_journal;
+
+        while (ordered_hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
+                /* Too many open? Then let's close one */
+                f = ordered_hashmap_steal_first(s->user_journals);
+                assert(f);
+                (void) journal_file_close(f);
+        }
+
+        r = open_journal(s, true, p, O_RDWR|O_CREAT, s->seal, &s->system_metrics, &f);
+        if (r < 0)
+                return s->system_journal;
+
+        server_add_acls(f, uid);
+
+        r = ordered_hashmap_put(s->user_journals, UID_TO_PTR(uid), f);
+        if (r < 0) {
+                (void) journal_file_close(f);
+                return s->system_journal;
+        }
+
+        return f;
+}
+
+static int do_rotate(
+                Server *s,
+                JournalFile **f,
+                const char* name,
+                bool seal,
+                uint32_t uid) {
+
+        int r;
+        assert(s);
+
+        if (!*f)
+                return -EINVAL;
+
+        r = journal_file_rotate(f, s->compress, seal, s->deferred_closes);
+        if (r < 0)
+                if (*f)
+                        log_error_errno(r, "Failed to rotate %s: %m", (*f)->path);
+                else
+                        log_error_errno(r, "Failed to create new %s journal: %m", name);
+        else
+                server_add_acls(*f, uid);
+
+        return r;
+}
+
+void server_rotate(Server *s) {
+        JournalFile *f;
+        void *k;
+        Iterator i;
+        int r;
+
+        log_debug("Rotating...");
+
+        (void) do_rotate(s, &s->runtime_journal, "runtime", false, 0);
+        (void) do_rotate(s, &s->system_journal, "system", s->seal, 0);
+
+        ORDERED_HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
+                r = do_rotate(s, &f, "user", s->seal, PTR_TO_UID(k));
+                if (r >= 0)
+                        ordered_hashmap_replace(s->user_journals, k, f);
+                else if (!f)
+                        /* Old file has been closed and deallocated */
+                        ordered_hashmap_remove(s->user_journals, k);
+        }
+
+        /* Perform any deferred closes which aren't still offlining. */
+        SET_FOREACH(f, s->deferred_closes, i)
+                if (!journal_file_is_offlining(f)) {
+                        (void) set_remove(s->deferred_closes, f);
+                        (void) journal_file_close(f);
+                }
+}
+
+void server_sync(Server *s) {
+        JournalFile *f;
+        Iterator i;
+        int r;
+
+        if (s->system_journal) {
+                r = journal_file_set_offline(s->system_journal, false);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to sync system journal, ignoring: %m");
+        }
+
+        ORDERED_HASHMAP_FOREACH(f, s->user_journals, i) {
+                r = journal_file_set_offline(f, false);
+                if (r < 0)
+                        log_warning_errno(r, "Failed to sync user journal, ignoring: %m");
+        }
+
+        if (s->sync_event_source) {
+                r = sd_event_source_set_enabled(s->sync_event_source, SD_EVENT_OFF);
+                if (r < 0)
+                        log_error_errno(r, "Failed to disable sync timer source: %m");
+        }
+
+        s->sync_scheduled = false;
+}
+
+static void do_vacuum(
+                Server *s,
+                JournalFile *f,
+                JournalMetrics *metrics,
+                const char *path,
+                const char *name,
+                bool verbose,
+                bool patch_min_use) {
+
+        const char *p;
+        uint64_t limit;
+        int r;
+
+        assert(s);
+        assert(metrics);
+        assert(path);
+        assert(name);
+
+        if (!f)
+                return;
+
+        p = strjoina(path, SERVER_MACHINE_ID(s));
+
+        limit = metrics->max_use;
+        (void) determine_space_for(s, metrics, path, name, verbose, patch_min_use, NULL, &limit);
+
+        r = journal_directory_vacuum(p, limit, metrics->n_max_files, s->max_retention_usec, &s->oldest_file_usec,  verbose);
+        if (r < 0 && r != -ENOENT)
+                log_warning_errno(r, "Failed to vacuum %s, ignoring: %m", p);
+}
+
+int server_vacuum(Server *s, bool verbose, bool patch_min_use) {
+        assert(s);
+
+        log_debug("Vacuuming...");
+
+        s->oldest_file_usec = 0;
+
+        do_vacuum(s, s->system_journal, &s->system_metrics, "/var/log/journal/", "System journal", verbose, patch_min_use);
+        do_vacuum(s, s->runtime_journal, &s->runtime_metrics, "/run/log/journal/", "Runtime journal", verbose, patch_min_use);
+
+        s->cached_space_limit = 0;
+        s->cached_space_available = 0;
+        s->cached_space_timestamp = 0;
+
+        return 0;
+}
+
+static void server_cache_machine_id(Server *s) {
+        sd_id128_t id;
+        int r;
+
+        assert(s);
+
+        r = sd_id128_get_machine(&id);
+        if (r < 0)
+                return;
+
+        sd_id128_to_string(id, stpcpy(s->machine_id_field, "_MACHINE_ID="));
+}
+
+static void server_cache_boot_id(Server *s) {
+        sd_id128_t id;
+        int r;
+
+        assert(s);
+
+        r = sd_id128_get_boot(&id);
+        if (r < 0)
+                return;
+
+        sd_id128_to_string(id, stpcpy(s->boot_id_field, "_BOOT_ID="));
+}
+
+static void server_cache_hostname(Server *s) {
+        _cleanup_free_ char *t = NULL;
+        char *x;
+
+        assert(s);
+
+        t = gethostname_malloc();
+        if (!t)
+                return;
+
+        x = strappend("_HOSTNAME=", t);
+        if (!x)
+                return;
+
+        free(s->hostname_field);
+        s->hostname_field = x;
+}
+
+static bool shall_try_append_again(JournalFile *f, int r) {
+        switch(r) {
+        case -E2BIG:           /* Hit configured limit          */
+        case -EFBIG:           /* Hit fs limit                  */
+        case -EDQUOT:          /* Quota limit hit               */
+        case -ENOSPC:          /* Disk full                     */
+                log_debug("%s: Allocation limit reached, rotating.", f->path);
+                return true;
+        case -EIO:             /* I/O error of some kind (mmap) */
+                log_warning("%s: IO error, rotating.", f->path);
+                return true;
+        case -EHOSTDOWN:       /* Other machine                 */
+                log_info("%s: Journal file from other machine, rotating.", f->path);
+                return true;
+        case -EBUSY:           /* Unclean shutdown              */
+                log_info("%s: Unclean shutdown, rotating.", f->path);
+                return true;
+        case -EPROTONOSUPPORT: /* Unsupported feature           */
+                log_info("%s: Unsupported feature, rotating.", f->path);
+                return true;
+        case -EBADMSG:         /* Corrupted                     */
+        case -ENODATA:         /* Truncated                     */
+        case -ESHUTDOWN:       /* Already archived              */
+                log_warning("%s: Journal file corrupted, rotating.", f->path);
+                return true;
+        case -EIDRM:           /* Journal file has been deleted */
+                log_warning("%s: Journal file has been deleted, rotating.", f->path);
+                return true;
+        default:
+                return false;
+        }
+}
+
+static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, unsigned n, int priority) {
+        JournalFile *f;
+        bool vacuumed = false;
+        int r;
+
+        assert(s);
+        assert(iovec);
+        assert(n > 0);
+
+        f = find_journal(s, uid);
+        if (!f)
+                return;
+
+        if (journal_file_rotate_suggested(f, s->max_file_usec)) {
+                log_debug("%s: Journal header limits reached or header out-of-date, rotating.", f->path);
+                server_rotate(s);
+                server_vacuum(s, false, false);
+                vacuumed = true;
+
+                f = find_journal(s, uid);
+                if (!f)
+                        return;
+        }
+
+        r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
+        if (r >= 0) {
+                server_schedule_sync(s, priority);
+                return;
+        }
+
+        if (vacuumed || !shall_try_append_again(f, r)) {
+                log_error_errno(r, "Failed to write entry (%d items, %zu bytes), ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n));
+                return;
+        }
+
+        server_rotate(s);
+        server_vacuum(s, false, false);
+
+        f = find_journal(s, uid);
+        if (!f)
+                return;
+
+        log_debug("Retrying write.");
+        r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
+        if (r < 0)
+                log_error_errno(r, "Failed to write entry (%d items, %zu bytes) despite vacuuming, ignoring: %m", n, IOVEC_TOTAL_SIZE(iovec, n));
+        else
+                server_schedule_sync(s, priority);
+}
+
+static void dispatch_message_real(
+                Server *s,
+                struct iovec *iovec, unsigned n, unsigned m,
+                const struct ucred *ucred,
+                const struct timeval *tv,
+                const char *label, size_t label_len,
+                const char *unit_id,
+                int priority,
+                pid_t object_pid) {
+
+        char    pid[sizeof("_PID=") + DECIMAL_STR_MAX(pid_t)],
+                uid[sizeof("_UID=") + DECIMAL_STR_MAX(uid_t)],
+                gid[sizeof("_GID=") + DECIMAL_STR_MAX(gid_t)],
+                owner_uid[sizeof("_SYSTEMD_OWNER_UID=") + DECIMAL_STR_MAX(uid_t)],
+                source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=") + DECIMAL_STR_MAX(usec_t)],
+                o_uid[sizeof("OBJECT_UID=") + DECIMAL_STR_MAX(uid_t)],
+                o_gid[sizeof("OBJECT_GID=") + DECIMAL_STR_MAX(gid_t)],
+                o_owner_uid[sizeof("OBJECT_SYSTEMD_OWNER_UID=") + DECIMAL_STR_MAX(uid_t)];
+        uid_t object_uid;
+        gid_t object_gid;
+        char *x;
+        int r;
+        char *t, *c;
+        uid_t realuid = 0, owner = 0, journal_uid;
+        bool owner_valid = false;
+#ifdef HAVE_AUDIT
+        char    audit_session[sizeof("_AUDIT_SESSION=") + DECIMAL_STR_MAX(uint32_t)],
+                audit_loginuid[sizeof("_AUDIT_LOGINUID=") + DECIMAL_STR_MAX(uid_t)],
+                o_audit_session[sizeof("OBJECT_AUDIT_SESSION=") + DECIMAL_STR_MAX(uint32_t)],
+                o_audit_loginuid[sizeof("OBJECT_AUDIT_LOGINUID=") + DECIMAL_STR_MAX(uid_t)];
+
+        uint32_t audit;
+        uid_t loginuid;
+#endif
+
+        assert(s);
+        assert(iovec);
+        assert(n > 0);
+        assert(n + N_IOVEC_META_FIELDS + (object_pid ? N_IOVEC_OBJECT_FIELDS : 0) <= m);
+
+        if (ucred) {
+                realuid = ucred->uid;
+
+                sprintf(pid, "_PID="PID_FMT, ucred->pid);
+                IOVEC_SET_STRING(iovec[n++], pid);
+
+                sprintf(uid, "_UID="UID_FMT, ucred->uid);
+                IOVEC_SET_STRING(iovec[n++], uid);
+
+                sprintf(gid, "_GID="GID_FMT, ucred->gid);
+                IOVEC_SET_STRING(iovec[n++], gid);
+
+                r = get_process_comm(ucred->pid, &t);
+                if (r >= 0) {
+                        x = strjoina("_COMM=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+                r = get_process_exe(ucred->pid, &t);
+                if (r >= 0) {
+                        x = strjoina("_EXE=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+                r = get_process_cmdline(ucred->pid, 0, false, &t);
+                if (r >= 0) {
+                        x = strjoina("_CMDLINE=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+                r = get_process_capeff(ucred->pid, &t);
+                if (r >= 0) {
+                        x = strjoina("_CAP_EFFECTIVE=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+#ifdef HAVE_AUDIT
+                r = audit_session_from_pid(ucred->pid, &audit);
+                if (r >= 0) {
+                        sprintf(audit_session, "_AUDIT_SESSION=%"PRIu32, audit);
+                        IOVEC_SET_STRING(iovec[n++], audit_session);
+                }
+
+                r = audit_loginuid_from_pid(ucred->pid, &loginuid);
+                if (r >= 0) {
+                        sprintf(audit_loginuid, "_AUDIT_LOGINUID="UID_FMT, loginuid);
+                        IOVEC_SET_STRING(iovec[n++], audit_loginuid);
+                }
+#endif
+
+                r = cg_pid_get_path_shifted(ucred->pid, s->cgroup_root, &c);
+                if (r >= 0) {
+                        char *session = NULL;
+
+                        x = strjoina("_SYSTEMD_CGROUP=", c);
+                        IOVEC_SET_STRING(iovec[n++], x);
+
+                        r = cg_path_get_session(c, &t);
+                        if (r >= 0) {
+                                session = strjoina("_SYSTEMD_SESSION=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], session);
+                        }
+
+                        if (cg_path_get_owner_uid(c, &owner) >= 0) {
+                                owner_valid = true;
+
+                                sprintf(owner_uid, "_SYSTEMD_OWNER_UID="UID_FMT, owner);
+                                IOVEC_SET_STRING(iovec[n++], owner_uid);
+                        }
+
+                        if (cg_path_get_unit(c, &t) >= 0) {
+                                x = strjoina("_SYSTEMD_UNIT=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        } else if (unit_id && !session) {
+                                x = strjoina("_SYSTEMD_UNIT=", unit_id);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        if (cg_path_get_user_unit(c, &t) >= 0) {
+                                x = strjoina("_SYSTEMD_USER_UNIT=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        } else if (unit_id && session) {
+                                x = strjoina("_SYSTEMD_USER_UNIT=", unit_id);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        if (cg_path_get_slice(c, &t) >= 0) {
+                                x = strjoina("_SYSTEMD_SLICE=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        free(c);
+                } else if (unit_id) {
+                        x = strjoina("_SYSTEMD_UNIT=", unit_id);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+#ifdef HAVE_SELINUX
+                if (mac_selinux_have()) {
+                        if (label) {
+                                x = alloca(strlen("_SELINUX_CONTEXT=") + label_len + 1);
+
+                                *((char*) mempcpy(stpcpy(x, "_SELINUX_CONTEXT="), label, label_len)) = 0;
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        } else {
+                                security_context_t con;
+
+                                if (getpidcon(ucred->pid, &con) >= 0) {
+                                        x = strjoina("_SELINUX_CONTEXT=", con);
+
+                                        freecon(con);
+                                        IOVEC_SET_STRING(iovec[n++], x);
+                                }
+                        }
+                }
+#endif
+        }
+        assert(n <= m);
+
+        if (object_pid) {
+                r = get_process_uid(object_pid, &object_uid);
+                if (r >= 0) {
+                        sprintf(o_uid, "OBJECT_UID="UID_FMT, object_uid);
+                        IOVEC_SET_STRING(iovec[n++], o_uid);
+                }
+
+                r = get_process_gid(object_pid, &object_gid);
+                if (r >= 0) {
+                        sprintf(o_gid, "OBJECT_GID="GID_FMT, object_gid);
+                        IOVEC_SET_STRING(iovec[n++], o_gid);
+                }
+
+                r = get_process_comm(object_pid, &t);
+                if (r >= 0) {
+                        x = strjoina("OBJECT_COMM=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+                r = get_process_exe(object_pid, &t);
+                if (r >= 0) {
+                        x = strjoina("OBJECT_EXE=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+                r = get_process_cmdline(object_pid, 0, false, &t);
+                if (r >= 0) {
+                        x = strjoina("OBJECT_CMDLINE=", t);
+                        free(t);
+                        IOVEC_SET_STRING(iovec[n++], x);
+                }
+
+#ifdef HAVE_AUDIT
+                r = audit_session_from_pid(object_pid, &audit);
+                if (r >= 0) {
+                        sprintf(o_audit_session, "OBJECT_AUDIT_SESSION=%"PRIu32, audit);
+                        IOVEC_SET_STRING(iovec[n++], o_audit_session);
+                }
+
+                r = audit_loginuid_from_pid(object_pid, &loginuid);
+                if (r >= 0) {
+                        sprintf(o_audit_loginuid, "OBJECT_AUDIT_LOGINUID="UID_FMT, loginuid);
+                        IOVEC_SET_STRING(iovec[n++], o_audit_loginuid);
+                }
+#endif
+
+                r = cg_pid_get_path_shifted(object_pid, s->cgroup_root, &c);
+                if (r >= 0) {
+                        x = strjoina("OBJECT_SYSTEMD_CGROUP=", c);
+                        IOVEC_SET_STRING(iovec[n++], x);
+
+                        r = cg_path_get_session(c, &t);
+                        if (r >= 0) {
+                                x = strjoina("OBJECT_SYSTEMD_SESSION=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        if (cg_path_get_owner_uid(c, &owner) >= 0) {
+                                sprintf(o_owner_uid, "OBJECT_SYSTEMD_OWNER_UID="UID_FMT, owner);
+                                IOVEC_SET_STRING(iovec[n++], o_owner_uid);
+                        }
+
+                        if (cg_path_get_unit(c, &t) >= 0) {
+                                x = strjoina("OBJECT_SYSTEMD_UNIT=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        if (cg_path_get_user_unit(c, &t) >= 0) {
+                                x = strjoina("OBJECT_SYSTEMD_USER_UNIT=", t);
+                                free(t);
+                                IOVEC_SET_STRING(iovec[n++], x);
+                        }
+
+                        free(c);
+                }
+        }
+        assert(n <= m);
+
+        if (tv) {
+                sprintf(source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu", (unsigned long long) timeval_load(tv));
+                IOVEC_SET_STRING(iovec[n++], source_time);
+        }
+
+        /* Note that strictly speaking storing the boot id here is
+         * redundant since the entry includes this in-line
+         * anyway. However, we need this indexed, too. */
+        if (!isempty(s->boot_id_field))
+                IOVEC_SET_STRING(iovec[n++], s->boot_id_field);
+
+        if (!isempty(s->machine_id_field))
+                IOVEC_SET_STRING(iovec[n++], s->machine_id_field);
+
+        if (!isempty(s->hostname_field))
+                IOVEC_SET_STRING(iovec[n++], s->hostname_field);
+
+        assert(n <= m);
+
+        if (s->split_mode == SPLIT_UID && realuid > 0)
+                /* Split up strictly by any UID */
+                journal_uid = realuid;
+        else if (s->split_mode == SPLIT_LOGIN && realuid > 0 && owner_valid && owner > 0)
+                /* Split up by login UIDs.  We do this only if the
+                 * realuid is not root, in order not to accidentally
+                 * leak privileged information to the user that is
+                 * logged by a privileged process that is part of an
+                 * unprivileged session. */
+                journal_uid = owner;
+        else
+                journal_uid = 0;
+
+        write_to_journal(s, journal_uid, iovec, n, priority);
+}
+
+void server_driver_message(Server *s, sd_id128_t message_id, const char *format, ...) {
+        char mid[11 + 32 + 1];
+        struct iovec iovec[N_IOVEC_META_FIELDS + 5 + N_IOVEC_PAYLOAD_FIELDS];
+        unsigned n = 0, m;
+        int r;
+        va_list ap;
+        struct ucred ucred = {};
+
+        assert(s);
+        assert(format);
+
+        assert_cc(3 == LOG_FAC(LOG_DAEMON));
+        IOVEC_SET_STRING(iovec[n++], "SYSLOG_FACILITY=3");
+        IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=systemd-journald");
+
+        IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver");
+        assert_cc(6 == LOG_INFO);
+        IOVEC_SET_STRING(iovec[n++], "PRIORITY=6");
+
+        if (!sd_id128_equal(message_id, SD_ID128_NULL)) {
+                snprintf(mid, sizeof(mid), LOG_MESSAGE_ID(message_id));
+                IOVEC_SET_STRING(iovec[n++], mid);
+        }
+
+        m = n;
+
+        va_start(ap, format);
+        r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, false, 0, format, ap);
+        /* Error handling below */
+        va_end(ap);
+
+        ucred.pid = getpid();
+        ucred.uid = getuid();
+        ucred.gid = getgid();
+
+        if (r >= 0)
+                dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL, LOG_INFO, 0);
+
+        while (m < n)
+                free(iovec[m++].iov_base);
+
+        if (r < 0) {
+                /* We failed to format the message. Emit a warning instead. */
+                char buf[LINE_MAX];
+
+                xsprintf(buf, "MESSAGE=Entry printing failed: %s", strerror(-r));
+
+                n = 3;
+                IOVEC_SET_STRING(iovec[n++], "PRIORITY=4");
+                IOVEC_SET_STRING(iovec[n++], buf);
+                dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL, LOG_INFO, 0);
+        }
+}
+
+void server_dispatch_message(
+                Server *s,
+                struct iovec *iovec, unsigned n, unsigned m,
+                const struct ucred *ucred,
+                const struct timeval *tv,
+                const char *label, size_t label_len,
+                const char *unit_id,
+                int priority,
+                pid_t object_pid) {
+
+        int rl, r;
+        _cleanup_free_ char *path = NULL;
+        uint64_t available = 0;
+        char *c;
+
+        assert(s);
+        assert(iovec || n == 0);
+
+        if (n == 0)
+                return;
+
+        if (LOG_PRI(priority) > s->max_level_store)
+                return;
+
+        /* Stop early in case the information will not be stored
+         * in a journal. */
+        if (s->storage == STORAGE_NONE)
+                return;
+
+        if (!ucred)
+                goto finish;
+
+        r = cg_pid_get_path_shifted(ucred->pid, s->cgroup_root, &path);
+        if (r < 0)
+                goto finish;
+
+        /* example: /user/lennart/3/foobar
+         *          /system/dbus.service/foobar
+         *
+         * So let's cut of everything past the third /, since that is
+         * where user directories start */
+
+        c = strchr(path, '/');
+        if (c) {
+                c = strchr(c+1, '/');
+                if (c) {
+                        c = strchr(c+1, '/');
+                        if (c)
+                                *c = 0;
+                }
+        }
+
+        (void) determine_space(s, false, false, &available, NULL);
+        rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, available);
+        if (rl == 0)
+                return;
+
+        /* Write a suppression message if we suppressed something */
+        if (rl > 1)
+                server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED,
+                                      LOG_MESSAGE("Suppressed %u messages from %s", rl - 1, path),
+                                      NULL);
+
+finish:
+        dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id, priority, object_pid);
+}
+
+
+static int system_journal_open(Server *s, bool flush_requested) {
+        const char *fn;
+        int r = 0;
+
+        if (!s->system_journal &&
+            (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) &&
+            (flush_requested
+             || access("/run/systemd/journal/flushed", F_OK) >= 0)) {
+
+                /* If in auto mode: first try to create the machine
+                 * path, but not the prefix.
+                 *
+                 * If in persistent mode: create /var/log/journal and
+                 * the machine path */
+
+                if (s->storage == STORAGE_PERSISTENT)
+                        (void) mkdir_p("/var/log/journal/", 0755);
+
+                fn = strjoina("/var/log/journal/", SERVER_MACHINE_ID(s));
+                (void) mkdir(fn, 0755);
+
+                fn = strjoina(fn, "/system.journal");
+                r = open_journal(s, true, fn, O_RDWR|O_CREAT, s->seal, &s->system_metrics, &s->system_journal);
+                if (r >= 0) {
+                        server_add_acls(s->system_journal, 0);
+                        (void) determine_space_for(s, &s->system_metrics, "/var/log/journal/", "System journal", true, true, NULL, NULL);
+                } else if (r < 0) {
+                        if (r != -ENOENT && r != -EROFS)
+                                log_warning_errno(r, "Failed to open system journal: %m");
+
+                        r = 0;
+                }
+        }
+
+        if (!s->runtime_journal &&
+            (s->storage != STORAGE_NONE)) {
+
+                fn = strjoina("/run/log/journal/", SERVER_MACHINE_ID(s), "/system.journal");
+
+                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 = open_journal(s, false, fn, O_RDWR, false, &s->runtime_metrics, &s->runtime_journal);
+                        if (r < 0) {
+                                if (r != -ENOENT)
+                                        log_warning_errno(r, "Failed to open runtime journal: %m");
+
+                                r = 0;
+                        }
+
+                } else {
+
+                        /* OK, we really need the runtime journal, so create
+                         * it if necessary. */
+
+                        (void) mkdir("/run/log", 0755);
+                        (void) mkdir("/run/log/journal", 0755);
+                        (void) mkdir_parents(fn, 0750);
+
+                        r = open_journal(s, true, fn, O_RDWR|O_CREAT, false, &s->runtime_metrics, &s->runtime_journal);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to open runtime journal: %m");
+                }
+
+                if (s->runtime_journal) {
+                        server_add_acls(s->runtime_journal, 0);
+                        (void) determine_space_for(s, &s->runtime_metrics, "/run/log/journal/", "Runtime journal", true, true, NULL, NULL);
+                }
+        }
+
+        return r;
+}
+
+int server_flush_to_var(Server *s) {
+        sd_id128_t machine;
+        sd_journal *j = NULL;
+        char ts[FORMAT_TIMESPAN_MAX];
+        usec_t start;
+        unsigned n = 0;
+        int r;
+
+        assert(s);
+
+        if (s->storage != STORAGE_AUTO &&
+            s->storage != STORAGE_PERSISTENT)
+                return 0;
+
+        if (!s->runtime_journal)
+                return 0;
+
+        (void) system_journal_open(s, true);
+
+        if (!s->system_journal)
+                return 0;
+
+        log_debug("Flushing to /var...");
+
+        start = now(CLOCK_MONOTONIC);
+
+        r = sd_id128_get_machine(&machine);
+        if (r < 0)
+                return r;
+
+        r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
+        if (r < 0)
+                return log_error_errno(r, "Failed to read runtime journal: %m");
+
+        sd_journal_set_data_threshold(j, 0);
+
+        SD_JOURNAL_FOREACH(j) {
+                Object *o = NULL;
+                JournalFile *f;
+
+                f = j->current_file;
+                assert(f && f->current_offset > 0);
+
+                n++;
+
+                r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
+                if (r < 0) {
+                        log_error_errno(r, "Can't read entry: %m");
+                        goto finish;
+                }
+
+                r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
+                if (r >= 0)
+                        continue;
+
+                if (!shall_try_append_again(s->system_journal, r)) {
+                        log_error_errno(r, "Can't write entry: %m");
+                        goto finish;
+                }
+
+                server_rotate(s);
+                server_vacuum(s, false, false);
+
+                if (!s->system_journal) {
+                        log_notice("Didn't flush runtime journal since rotation of system journal wasn't successful.");
+                        r = -EIO;
+                        goto finish;
+                }
+
+                log_debug("Retrying write.");
+                r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
+                if (r < 0) {
+                        log_error_errno(r, "Can't write entry: %m");
+                        goto finish;
+                }
+        }
+
+        r = 0;
+
+finish:
+        journal_file_post_change(s->system_journal);
+
+        s->runtime_journal = journal_file_close(s->runtime_journal);
+
+        if (r >= 0)
+                (void) rm_rf("/run/log/journal", REMOVE_ROOT);
+
+        sd_journal_close(j);
+
+        server_driver_message(s, SD_ID128_NULL,
+                              LOG_MESSAGE("Time spent on flushing to /var is %s for %u entries.",
+                                          format_timespan(ts, sizeof(ts), now(CLOCK_MONOTONIC) - start, 0),
+                                          n),
+                              NULL);
+
+        return r;
+}
+
+int server_process_datagram(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
+        Server *s = userdata;
+        struct ucred *ucred = NULL;
+        struct timeval *tv = NULL;
+        struct cmsghdr *cmsg;
+        char *label = NULL;
+        size_t label_len = 0, m;
+        struct iovec iovec;
+        ssize_t n;
+        int *fds = NULL, v = 0;
+        unsigned n_fds = 0;
+
+        union {
+                struct cmsghdr cmsghdr;
+
+                /* We use NAME_MAX space for the SELinux label
+                 * here. The kernel currently enforces no
+                 * limit, but according to suggestions from
+                 * the SELinux people this will change and it
+                 * will probably be identical to NAME_MAX. For
+                 * now we use that, but this should be updated
+                 * one day when the final limit is known. */
+                uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
+                            CMSG_SPACE(sizeof(struct timeval)) +
+                            CMSG_SPACE(sizeof(int)) + /* fd */
+                            CMSG_SPACE(NAME_MAX)]; /* selinux label */
+        } control = {};
+
+        union sockaddr_union sa = {};
+
+        struct msghdr msghdr = {
+                .msg_iov = &iovec,
+                .msg_iovlen = 1,
+                .msg_control = &control,
+                .msg_controllen = sizeof(control),
+                .msg_name = &sa,
+                .msg_namelen = sizeof(sa),
+        };
+
+        assert(s);
+        assert(fd == s->native_fd || fd == s->syslog_fd || fd == s->audit_fd);
+
+        if (revents != EPOLLIN) {
+                log_error("Got invalid event from epoll for datagram fd: %"PRIx32, revents);
+                return -EIO;
+        }
+
+        /* Try to get the right size, if we can. (Not all
+         * sockets support SIOCINQ, hence we just try, but
+         * don't rely on it. */
+        (void) ioctl(fd, SIOCINQ, &v);
+
+        /* Fix it up, if it is too small. We use the same fixed value as auditd here. Awful! */
+        m = PAGE_ALIGN(MAX3((size_t) v + 1,
+                            (size_t) LINE_MAX,
+                            ALIGN(sizeof(struct nlmsghdr)) + ALIGN((size_t) MAX_AUDIT_MESSAGE_LENGTH)) + 1);
+
+        if (!GREEDY_REALLOC(s->buffer, s->buffer_size, m))
+                return log_oom();
+
+        iovec.iov_base = s->buffer;
+        iovec.iov_len = s->buffer_size - 1; /* Leave room for trailing NUL we add later */
+
+        n = recvmsg(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
+        if (n < 0) {
+                if (errno == EINTR || errno == EAGAIN)
+                        return 0;
+
+                return log_error_errno(errno, "recvmsg() failed: %m");
+        }
+
+        CMSG_FOREACH(cmsg, &msghdr) {
+
+                if (cmsg->cmsg_level == SOL_SOCKET &&
+                    cmsg->cmsg_type == SCM_CREDENTIALS &&
+                    cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
+                        ucred = (struct ucred*) CMSG_DATA(cmsg);
+                else if (cmsg->cmsg_level == SOL_SOCKET &&
+                         cmsg->cmsg_type == SCM_SECURITY) {
+                        label = (char*) CMSG_DATA(cmsg);
+                        label_len = cmsg->cmsg_len - CMSG_LEN(0);
+                } else if (cmsg->cmsg_level == SOL_SOCKET &&
+                           cmsg->cmsg_type == SO_TIMESTAMP &&
+                           cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
+                        tv = (struct timeval*) CMSG_DATA(cmsg);
+                else if (cmsg->cmsg_level == SOL_SOCKET &&
+                         cmsg->cmsg_type == SCM_RIGHTS) {
+                        fds = (int*) CMSG_DATA(cmsg);
+                        n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int);
+                }
+        }
+
+        /* And a trailing NUL, just in case */
+        s->buffer[n] = 0;
+
+        if (fd == s->syslog_fd) {
+                if (n > 0 && n_fds == 0)
+                        server_process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len);
+                else if (n_fds > 0)
+                        log_warning("Got file descriptors via syslog socket. Ignoring.");
+
+        } else if (fd == s->native_fd) {
+                if (n > 0 && n_fds == 0)
+                        server_process_native_message(s, s->buffer, n, ucred, tv, label, label_len);
+                else if (n == 0 && n_fds == 1)
+                        server_process_native_file(s, fds[0], ucred, tv, label, label_len);
+                else if (n_fds > 0)
+                        log_warning("Got too many file descriptors via native socket. Ignoring.");
+
+        } else {
+                assert(fd == s->audit_fd);
+
+                if (n > 0 && n_fds == 0)
+                        server_process_audit_message(s, s->buffer, n, ucred, &sa, msghdr.msg_namelen);
+                else if (n_fds > 0)
+                        log_warning("Got file descriptors via audit socket. Ignoring.");
+        }
+
+        close_many(fds, n_fds);
+        return 0;
+}
+
+static int dispatch_sigusr1(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
+        Server *s = userdata;
+        int r;
+
+        assert(s);
+
+        log_info("Received request to flush runtime journal from PID " PID_FMT, si->ssi_pid);
+
+        server_flush_to_var(s);
+        server_sync(s);
+        server_vacuum(s, false, false);
+
+        r = touch("/run/systemd/journal/flushed");
+        if (r < 0)
+                log_warning_errno(r, "Failed to touch /run/systemd/journal/flushed, ignoring: %m");
+
+        return 0;
+}
+
+static int dispatch_sigusr2(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
+        Server *s = userdata;
+        int r;
+
+        assert(s);
+
+        log_info("Received request to rotate journal from PID " PID_FMT, si->ssi_pid);
+        server_rotate(s);
+        server_vacuum(s, true, true);
+
+        /* Let clients know when the most recent rotation happened. */
+        r = write_timestamp_file_atomic("/run/systemd/journal/rotated", now(CLOCK_MONOTONIC));
+        if (r < 0)
+                log_warning_errno(r, "Failed to write /run/systemd/journal/rotated, ignoring: %m");
+
+        return 0;
+}
+
+static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
+        Server *s = userdata;
+
+        assert(s);
+
+        log_received_signal(LOG_INFO, si);
+
+        sd_event_exit(s->event, 0);
+        return 0;
+}
+
+static int dispatch_sigrtmin1(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
+        Server *s = userdata;
+        int r;
+
+        assert(s);
+
+        log_debug("Received request to sync from PID " PID_FMT, si->ssi_pid);
+
+        server_sync(s);
+
+        /* Let clients know when the most recent sync happened. */
+        r = write_timestamp_file_atomic("/run/systemd/journal/synced", now(CLOCK_MONOTONIC));
+        if (r < 0)
+                log_warning_errno(r, "Failed to write /run/systemd/journal/synced, ignoring: %m");
+
+        return 0;
+}
+
+static int setup_signals(Server *s) {
+        int r;
+
+        assert(s);
+
+        assert(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, SIGRTMIN+1, -1) >= 0);
+
+        r = sd_event_add_signal(s->event, &s->sigusr1_event_source, SIGUSR1, dispatch_sigusr1, s);
+        if (r < 0)
+                return r;
+
+        r = sd_event_add_signal(s->event, &s->sigusr2_event_source, SIGUSR2, dispatch_sigusr2, s);
+        if (r < 0)
+                return r;
+
+        r = sd_event_add_signal(s->event, &s->sigterm_event_source, SIGTERM, dispatch_sigterm, s);
+        if (r < 0)
+                return r;
+
+        /* Let's process SIGTERM late, so that we flush all queued
+         * messages to disk before we exit */
+        r = sd_event_source_set_priority(s->sigterm_event_source, SD_EVENT_PRIORITY_NORMAL+20);
+        if (r < 0)
+                return r;
+
+        /* When journald is invoked on the terminal (when debugging),
+         * it's useful if C-c is handled equivalent to SIGTERM. */
+        r = sd_event_add_signal(s->event, &s->sigint_event_source, SIGINT, dispatch_sigterm, s);
+        if (r < 0)
+                return r;
+
+        r = sd_event_source_set_priority(s->sigint_event_source, SD_EVENT_PRIORITY_NORMAL+20);
+        if (r < 0)
+                return r;
+
+        /* SIGRTMIN+1 causes an immediate sync. We process this very
+         * late, so that everything else queued at this point is
+         * really written to disk. Clients can watch
+         * /run/systemd/journal/synced with inotify until its mtime
+         * changes to see when a sync happened. */
+        r = sd_event_add_signal(s->event, &s->sigrtmin1_event_source, SIGRTMIN+1, dispatch_sigrtmin1, s);
+        if (r < 0)
+                return r;
+
+        r = sd_event_source_set_priority(s->sigrtmin1_event_source, SD_EVENT_PRIORITY_NORMAL+15);
+        if (r < 0)
+                return r;
+
+        return 0;
+}
+
+static int server_parse_proc_cmdline(Server *s) {
+        _cleanup_free_ char *line = NULL;
+        const char *p;
+        int r;
+
+        r = proc_cmdline(&line);
+        if (r < 0) {
+                log_warning_errno(r, "Failed to read /proc/cmdline, ignoring: %m");
+                return 0;
+        }
+
+        p = line;
+        for (;;) {
+                _cleanup_free_ char *word = NULL;
+
+                r = extract_first_word(&p, &word, NULL, 0);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to parse journald syntax \"%s\": %m", line);
+
+                if (r == 0)
+                        break;
+
+                if (startswith(word, "systemd.journald.forward_to_syslog=")) {
+                        r = parse_boolean(word + 35);
+                        if (r < 0)
+                                log_warning("Failed to parse forward to syslog switch %s. Ignoring.", word + 35);
+                        else
+                                s->forward_to_syslog = r;
+                } else if (startswith(word, "systemd.journald.forward_to_kmsg=")) {
+                        r = parse_boolean(word + 33);
+                        if (r < 0)
+                                log_warning("Failed to parse forward to kmsg switch %s. Ignoring.", word + 33);
+                        else
+                                s->forward_to_kmsg = r;
+                } else if (startswith(word, "systemd.journald.forward_to_console=")) {
+                        r = parse_boolean(word + 36);
+                        if (r < 0)
+                                log_warning("Failed to parse forward to console switch %s. Ignoring.", word + 36);
+                        else
+                                s->forward_to_console = r;
+                } else if (startswith(word, "systemd.journald.forward_to_wall=")) {
+                        r = parse_boolean(word + 33);
+                        if (r < 0)
+                                log_warning("Failed to parse forward to wall switch %s. Ignoring.", word + 33);
+                        else
+                                s->forward_to_wall = r;
+                } else if (startswith(word, "systemd.journald"))
+                        log_warning("Invalid systemd.journald parameter. Ignoring.");
+        }
+
+        /* do not warn about state here, since probably systemd already did */
+        return 0;
+}
+
+static int server_parse_config_file(Server *s) {
+        assert(s);
+
+        return config_parse_many(PKGSYSCONFDIR "/journald.conf",
+                                 CONF_PATHS_NULSTR("systemd/journald.conf.d"),
+                                 "Journal\0",
+                                 config_item_perf_lookup, journald_gperf_lookup,
+                                 false, s);
+}
+
+static int server_dispatch_sync(sd_event_source *es, usec_t t, void *userdata) {
+        Server *s = userdata;
+
+        assert(s);
+
+        server_sync(s);
+        return 0;
+}
+
+int server_schedule_sync(Server *s, int priority) {
+        int r;
+
+        assert(s);
+
+        if (priority <= LOG_CRIT) {
+                /* Immediately sync to disk when this is of priority CRIT, ALERT, EMERG */
+                server_sync(s);
+                return 0;
+        }
+
+        if (s->sync_scheduled)
+                return 0;
+
+        if (s->sync_interval_usec > 0) {
+                usec_t when;
+
+                r = sd_event_now(s->event, CLOCK_MONOTONIC, &when);
+                if (r < 0)
+                        return r;
+
+                when += s->sync_interval_usec;
+
+                if (!s->sync_event_source) {
+                        r = sd_event_add_time(
+                                        s->event,
+                                        &s->sync_event_source,
+                                        CLOCK_MONOTONIC,
+                                        when, 0,
+                                        server_dispatch_sync, s);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_event_source_set_priority(s->sync_event_source, SD_EVENT_PRIORITY_IMPORTANT);
+                } else {
+                        r = sd_event_source_set_time(s->sync_event_source, when);
+                        if (r < 0)
+                                return r;
+
+                        r = sd_event_source_set_enabled(s->sync_event_source, SD_EVENT_ONESHOT);
+                }
+                if (r < 0)
+                        return r;
+
+                s->sync_scheduled = true;
+        }
+
+        return 0;
+}
+
+static int dispatch_hostname_change(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
+        Server *s = userdata;
+
+        assert(s);
+
+        server_cache_hostname(s);
+        return 0;
+}
+
+static int server_open_hostname(Server *s) {
+        int r;
+
+        assert(s);
+
+        s->hostname_fd = open("/proc/sys/kernel/hostname", O_RDONLY|O_CLOEXEC|O_NDELAY|O_NOCTTY);
+        if (s->hostname_fd < 0)
+                return log_error_errno(errno, "Failed to open /proc/sys/kernel/hostname: %m");
+
+        r = sd_event_add_io(s->event, &s->hostname_event_source, s->hostname_fd, 0, dispatch_hostname_change, s);
+        if (r < 0) {
+                /* kernels prior to 3.2 don't support polling this file. Ignore
+                 * the failure. */
+                if (r == -EPERM) {
+                        log_warning_errno(r, "Failed to register hostname fd in event loop, ignoring: %m");
+                        s->hostname_fd = safe_close(s->hostname_fd);
+                        return 0;
+                }
+
+                return log_error_errno(r, "Failed to register hostname fd in event loop: %m");
+        }
+
+        r = sd_event_source_set_priority(s->hostname_event_source, SD_EVENT_PRIORITY_IMPORTANT-10);
+        if (r < 0)
+                return log_error_errno(r, "Failed to adjust priority of host name event source: %m");
+
+        return 0;
+}
+
+static int dispatch_notify_event(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
+        Server *s = userdata;
+        int r;
+
+        assert(s);
+        assert(s->notify_event_source == es);
+        assert(s->notify_fd == fd);
+
+        /* The $NOTIFY_SOCKET is writable again, now send exactly one
+         * message on it. Either it's the wtachdog event, the initial
+         * READY=1 event or an stdout stream event. If there's nothing
+         * to write anymore, turn our event source off. The next time
+         * there's something to send it will be turned on again. */
+
+        if (!s->sent_notify_ready) {
+                static const char p[] =
+                        "READY=1\n"
+                        "STATUS=Processing requests...";
+                ssize_t l;
+
+                l = send(s->notify_fd, p, strlen(p), MSG_DONTWAIT);
+                if (l < 0) {
+                        if (errno == EAGAIN)
+                                return 0;
+
+                        return log_error_errno(errno, "Failed to send READY=1 notification message: %m");
+                }
+
+                s->sent_notify_ready = true;
+                log_debug("Sent READY=1 notification.");
+
+        } else if (s->send_watchdog) {
+
+                static const char p[] =
+                        "WATCHDOG=1";
+
+                ssize_t l;
+
+                l = send(s->notify_fd, p, strlen(p), MSG_DONTWAIT);
+                if (l < 0) {
+                        if (errno == EAGAIN)
+                                return 0;
+
+                        return log_error_errno(errno, "Failed to send WATCHDOG=1 notification message: %m");
+                }
+
+                s->send_watchdog = false;
+                log_debug("Sent WATCHDOG=1 notification.");
+
+        } else if (s->stdout_streams_notify_queue)
+                /* Dispatch one stream notification event */
+                stdout_stream_send_notify(s->stdout_streams_notify_queue);
+
+        /* Leave us enabled if there's still more to to do. */
+        if (s->send_watchdog || s->stdout_streams_notify_queue)
+                return 0;
+
+        /* There was nothing to do anymore, let's turn ourselves off. */
+        r = sd_event_source_set_enabled(es, SD_EVENT_OFF);
+        if (r < 0)
+                return log_error_errno(r, "Failed to turn off notify event source: %m");
+
+        return 0;
+}
+
+static int dispatch_watchdog(sd_event_source *es, uint64_t usec, void *userdata) {
+        Server *s = userdata;
+        int r;
+
+        assert(s);
+
+        s->send_watchdog = true;
+
+        r = sd_event_source_set_enabled(s->notify_event_source, SD_EVENT_ON);
+        if (r < 0)
+                log_warning_errno(r, "Failed to turn on notify event source: %m");
+
+        r = sd_event_source_set_time(s->watchdog_event_source, usec + s->watchdog_usec / 2);
+        if (r < 0)
+                return log_error_errno(r, "Failed to restart watchdog event source: %m");
+
+        r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ON);
+        if (r < 0)
+                return log_error_errno(r, "Failed to enable watchdog event source: %m");
+
+        return 0;
+}
+
+static int server_connect_notify(Server *s) {
+        union sockaddr_union sa = {
+                .un.sun_family = AF_UNIX,
+        };
+        const char *e;
+        int r;
+
+        assert(s);
+        assert(s->notify_fd < 0);
+        assert(!s->notify_event_source);
+
+        /*
+          So here's the problem: we'd like to send notification
+          messages to PID 1, but we cannot do that via sd_notify(),
+          since that's synchronous, and we might end up blocking on
+          it. Specifically: given that PID 1 might block on
+          dbus-daemon during IPC, and dbus-daemon is logging to us,
+          and might hence block on us, we might end up in a deadlock
+          if we block on sending PID 1 notification messages — by
+          generating a full blocking circle. To avoid this, let's
+          create a non-blocking socket, and connect it to the
+          notification socket, and then wait for POLLOUT before we
+          send anything. This should efficiently avoid any deadlocks,
+          as we'll never block on PID 1, hence PID 1 can safely block
+          on dbus-daemon which can safely block on us again.
+
+          Don't think that this issue is real? It is, see:
+          https://github.com/systemd/systemd/issues/1505
+        */
+
+        e = getenv("NOTIFY_SOCKET");
+        if (!e)
+                return 0;
+
+        if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
+                log_error("NOTIFY_SOCKET set to an invalid value: %s", e);
+                return -EINVAL;
+        }
+
+        if (strlen(e) > sizeof(sa.un.sun_path)) {
+                log_error("NOTIFY_SOCKET path too long: %s", e);
+                return -EINVAL;
+        }
+
+        s->notify_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+        if (s->notify_fd < 0)
+                return log_error_errno(errno, "Failed to create notify socket: %m");
+
+        (void) fd_inc_sndbuf(s->notify_fd, NOTIFY_SNDBUF_SIZE);
+
+        strncpy(sa.un.sun_path, e, sizeof(sa.un.sun_path));
+        if (sa.un.sun_path[0] == '@')
+                sa.un.sun_path[0] = 0;
+
+        r = connect(s->notify_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un));
+        if (r < 0)
+                return log_error_errno(errno, "Failed to connect to notify socket: %m");
+
+        r = sd_event_add_io(s->event, &s->notify_event_source, s->notify_fd, EPOLLOUT, dispatch_notify_event, s);
+        if (r < 0)
+                return log_error_errno(r, "Failed to watch notification socket: %m");
+
+        if (sd_watchdog_enabled(false, &s->watchdog_usec) > 0) {
+                s->send_watchdog = true;
+
+                r = sd_event_add_time(s->event, &s->watchdog_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + s->watchdog_usec/2, s->watchdog_usec/4, dispatch_watchdog, s);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to add watchdog time event: %m");
+        }
+
+        /* This should fire pretty soon, which we'll use to send the
+         * READY=1 event. */
+
+        return 0;
+}
+
+int server_init(Server *s) {
+        _cleanup_fdset_free_ FDSet *fds = NULL;
+        int n, r, fd;
+        bool no_sockets;
+
+        assert(s);
+
+        zero(*s);
+        s->syslog_fd = s->native_fd = s->stdout_fd = s->dev_kmsg_fd = s->audit_fd = s->hostname_fd = s->notify_fd = -1;
+        s->compress = true;
+        s->seal = true;
+
+        s->watchdog_usec = USEC_INFINITY;
+
+        s->sync_interval_usec = DEFAULT_SYNC_INTERVAL_USEC;
+        s->sync_scheduled = false;
+
+        s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
+        s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
+
+        s->forward_to_wall = true;
+
+        s->max_file_usec = DEFAULT_MAX_FILE_USEC;
+
+        s->max_level_store = LOG_DEBUG;
+        s->max_level_syslog = LOG_DEBUG;
+        s->max_level_kmsg = LOG_NOTICE;
+        s->max_level_console = LOG_INFO;
+        s->max_level_wall = LOG_EMERG;
+
+        journal_reset_metrics(&s->system_metrics);
+        journal_reset_metrics(&s->runtime_metrics);
+
+        server_parse_config_file(s);
+        server_parse_proc_cmdline(s);
+
+        if (!!s->rate_limit_interval ^ !!s->rate_limit_burst) {
+                log_debug("Setting both rate limit interval and burst from "USEC_FMT",%u to 0,0",
+                          s->rate_limit_interval, s->rate_limit_burst);
+                s->rate_limit_interval = s->rate_limit_burst = 0;
+        }
+
+        (void) mkdir_p("/run/systemd/journal", 0755);
+
+        s->user_journals = ordered_hashmap_new(NULL);
+        if (!s->user_journals)
+                return log_oom();
+
+        s->mmap = mmap_cache_new();
+        if (!s->mmap)
+                return log_oom();
+
+        s->deferred_closes = set_new(NULL);
+        if (!s->deferred_closes)
+                return log_oom();
+
+        r = sd_event_default(&s->event);
+        if (r < 0)
+                return log_error_errno(r, "Failed to create event loop: %m");
+
+        n = sd_listen_fds(true);
+        if (n < 0)
+                return log_error_errno(n, "Failed to read listening file descriptors from environment: %m");
+
+        for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) {
+
+                if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) {
+
+                        if (s->native_fd >= 0) {
+                                log_error("Too many native sockets passed.");
+                                return -EINVAL;
+                        }
+
+                        s->native_fd = fd;
+
+                } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) {
+
+                        if (s->stdout_fd >= 0) {
+                                log_error("Too many stdout sockets passed.");
+                                return -EINVAL;
+                        }
+
+                        s->stdout_fd = fd;
+
+                } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0 ||
+                           sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/dev-log", 0) > 0) {
+
+                        if (s->syslog_fd >= 0) {
+                                log_error("Too many /dev/log sockets passed.");
+                                return -EINVAL;
+                        }
+
+                        s->syslog_fd = fd;
+
+                } else if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1) > 0) {
+
+                        if (s->audit_fd >= 0) {
+                                log_error("Too many audit sockets passed.");
+                                return -EINVAL;
+                        }
+
+                        s->audit_fd = fd;
+
+                } else {
+
+                        if (!fds) {
+                                fds = fdset_new();
+                                if (!fds)
+                                        return log_oom();
+                        }
+
+                        r = fdset_put(fds, fd);
+                        if (r < 0)
+                                return log_oom();
+                }
+        }
+
+        /* Try to restore streams, but don't bother if this fails */
+        (void) server_restore_streams(s, fds);
+
+        if (fdset_size(fds) > 0) {
+                log_warning("%u unknown file descriptors passed, closing.", fdset_size(fds));
+                fds = fdset_free(fds);
+        }
+
+        no_sockets = s->native_fd < 0 && s->stdout_fd < 0 && s->syslog_fd < 0 && s->audit_fd < 0;
+
+        /* always open stdout, syslog, native, and kmsg sockets */
+
+        /* systemd-journald.socket: /run/systemd/journal/stdout */
+        r = server_open_stdout_socket(s);
+        if (r < 0)
+                return r;
+
+        /* systemd-journald-dev-log.socket: /run/systemd/journal/dev-log */
+        r = server_open_syslog_socket(s);
+        if (r < 0)
+                return r;
+
+        /* systemd-journald.socket: /run/systemd/journal/socket */
+        r = server_open_native_socket(s);
+        if (r < 0)
+                return r;
+
+        /* /dev/ksmg */
+        r = server_open_dev_kmsg(s);
+        if (r < 0)
+                return r;
+
+        /* Unless we got *some* sockets and not audit, open audit socket */
+        if (s->audit_fd >= 0 || no_sockets) {
+                r = server_open_audit(s);
+                if (r < 0)
+                        return r;
+        }
+
+        r = server_open_kernel_seqnum(s);
+        if (r < 0)
+                return r;
+
+        r = server_open_hostname(s);
+        if (r < 0)
+                return r;
+
+        r = setup_signals(s);
+        if (r < 0)
+                return r;
+
+        s->udev = udev_new();
+        if (!s->udev)
+                return -ENOMEM;
+
+        s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, s->rate_limit_burst);
+        if (!s->rate_limit)
+                return -ENOMEM;
+
+        r = cg_get_root_path(&s->cgroup_root);
+        if (r < 0)
+                return r;
+
+        server_cache_hostname(s);
+        server_cache_boot_id(s);
+        server_cache_machine_id(s);
+
+        (void) server_connect_notify(s);
+
+        return system_journal_open(s, false);
+}
+
+void server_maybe_append_tags(Server *s) {
+#ifdef HAVE_GCRYPT
+        JournalFile *f;
+        Iterator i;
+        usec_t n;
+
+        n = now(CLOCK_REALTIME);
+
+        if (s->system_journal)
+                journal_file_maybe_append_tag(s->system_journal, n);
+
+        ORDERED_HASHMAP_FOREACH(f, s->user_journals, i)
+                journal_file_maybe_append_tag(f, n);
+#endif
+}
+
+void server_done(Server *s) {
+        JournalFile *f;
+        assert(s);
+
+        if (s->deferred_closes) {
+                journal_file_close_set(s->deferred_closes);
+                set_free(s->deferred_closes);
+        }
+
+        while (s->stdout_streams)
+                stdout_stream_free(s->stdout_streams);
+
+        if (s->system_journal)
+                (void) journal_file_close(s->system_journal);
+
+        if (s->runtime_journal)
+                (void) journal_file_close(s->runtime_journal);
+
+        while ((f = ordered_hashmap_steal_first(s->user_journals)))
+                (void) journal_file_close(f);
+
+        ordered_hashmap_free(s->user_journals);
+
+        sd_event_source_unref(s->syslog_event_source);
+        sd_event_source_unref(s->native_event_source);
+        sd_event_source_unref(s->stdout_event_source);
+        sd_event_source_unref(s->dev_kmsg_event_source);
+        sd_event_source_unref(s->audit_event_source);
+        sd_event_source_unref(s->sync_event_source);
+        sd_event_source_unref(s->sigusr1_event_source);
+        sd_event_source_unref(s->sigusr2_event_source);
+        sd_event_source_unref(s->sigterm_event_source);
+        sd_event_source_unref(s->sigint_event_source);
+        sd_event_source_unref(s->sigrtmin1_event_source);
+        sd_event_source_unref(s->hostname_event_source);
+        sd_event_source_unref(s->notify_event_source);
+        sd_event_source_unref(s->watchdog_event_source);
+        sd_event_unref(s->event);
+
+        safe_close(s->syslog_fd);
+        safe_close(s->native_fd);
+        safe_close(s->stdout_fd);
+        safe_close(s->dev_kmsg_fd);
+        safe_close(s->audit_fd);
+        safe_close(s->hostname_fd);
+        safe_close(s->notify_fd);
+
+        if (s->rate_limit)
+                journal_rate_limit_free(s->rate_limit);
+
+        if (s->kernel_seqnum)
+                munmap(s->kernel_seqnum, sizeof(uint64_t));
+
+        free(s->buffer);
+        free(s->tty_path);
+        free(s->cgroup_root);
+        free(s->hostname_field);
+
+        if (s->mmap)
+                mmap_cache_unref(s->mmap);
+
+        udev_unref(s->udev);
+}
+
+static const char* const storage_table[_STORAGE_MAX] = {
+        [STORAGE_AUTO] = "auto",
+        [STORAGE_VOLATILE] = "volatile",
+        [STORAGE_PERSISTENT] = "persistent",
+        [STORAGE_NONE] = "none"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(storage, Storage);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting");
+
+static const char* const split_mode_table[_SPLIT_MAX] = {
+        [SPLIT_LOGIN] = "login",
+        [SPLIT_UID] = "uid",
+        [SPLIT_NONE] = "none",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(split_mode, SplitMode);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed to parse split mode setting");