build-sys: store journald code in a noinst library

The point is to allow the use of journald functions by other binaries.
Before, journald code was split into multiple files (journald-*.[ch]),
but all those files all required functions from journald.c. And
journald.c has its own main(). Now, it is possible to link against
those functions, e.g. from test binaries.

This constitutes a fix for https://bugzilla.redhat.com/show_bug.cgi?id=872638.

The patch does the following:
1. rename journald.h to journald-server.h and move corresponding code
   to journald-server.c.
2. add journald-server.c and other journald-*.c parts to
   libsystemd-journal-internal.
3. remove journald-syslog.c from test_journal_syslog_SOURCES, since
   it is now contained in libsystemd-journal-internal.
There are no code changes, apart from the removal of a few static's,
to allow function calls between files.

1 files changed, 1 insertions, 1475 deletions

diff --git a/src/journal/journald.c b/src/journal/journald.c
index f56e822428..d6b9be5974 100644
--- a/src/journal/journald.c
+++ b/src/journal/journald.c
@@ -22,1490 +22,16 @@
 #include <sys/epoll.h>
 #include <sys/socket.h>
 #include <errno.h>
-#include <sys/signalfd.h>
 #include <unistd.h>
-#include <fcntl.h>
-#include <stddef.h>
-#include <sys/ioctl.h>
-#include <linux/sockios.h>
-#include <sys/statvfs.h>
-#include <sys/mman.h>
 
-#include <libudev.h>
 #include <systemd/sd-journal.h>
 #include <systemd/sd-messages.h>
 #include <systemd/sd-daemon.h>
 
-#ifdef HAVE_LOGIND
-#include <systemd/sd-login.h>
-#endif
-
-#include "mkdir.h"
-#include "hashmap.h"
-#include "journal-file.h"
-#include "socket-util.h"
-#include "cgroup-util.h"
-#include "list.h"
-#include "virt.h"
-#include "missing.h"
-#include "conf-parser.h"
-#include "journal-internal.h"
-#include "journal-vacuum.h"
 #include "journal-authenticate.h"
-#include "journald.h"
-#include "journald-rate-limit.h"
+#include "journald-server.h"
 #include "journald-kmsg.h"
 #include "journald-syslog.h"
-#include "journald-stream.h"
-#include "journald-console.h"
-#include "journald-native.h"
-
-#ifdef HAVE_ACL
-#include <sys/acl.h>
-#include <acl/libacl.h>
-#include "acl-util.h"
-#endif
-
-#ifdef HAVE_SELINUX
-#include <selinux/selinux.h>
-#endif
-
-#define USER_JOURNALS_MAX 1024
-
-#define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
-#define DEFAULT_RATE_LIMIT_BURST 200
-
-#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
-
-static const char* const storage_table[] = {
-        [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_NONE] = "none",
-        [SPLIT_UID] = "uid",
-        [SPLIT_LOGIN] = "login"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(split_mode, SplitMode);
-DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed to parse split mode setting");
-
-static uint64_t available_space(Server *s) {
-        char ids[33], *p;
-        const char *f;
-        sd_id128_t machine;
-        struct statvfs ss;
-        uint64_t sum = 0, avail = 0, ss_avail = 0;
-        int r;
-        DIR *d;
-        usec_t ts;
-        JournalMetrics *m;
-
-        ts = now(CLOCK_MONOTONIC);
-
-        if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts)
-                return s->cached_available_space;
-
-        r = sd_id128_get_machine(&machine);
-        if (r < 0)
-                return 0;
-
-        if (s->system_journal) {
-                f = "/var/log/journal/";
-                m = &s->system_metrics;
-        } else {
-                f = "/run/log/journal/";
-                m = &s->runtime_metrics;
-        }
-
-        assert(m);
-
-        p = strappend(f, sd_id128_to_string(machine, ids));
-        if (!p)
-                return 0;
-
-        d = opendir(p);
-        free(p);
-
-        if (!d)
-                return 0;
-
-        if (fstatvfs(dirfd(d), &ss) < 0)
-                goto finish;
-
-        for (;;) {
-                struct stat st;
-                struct dirent *de;
-                union dirent_storage buf;
-
-                r = readdir_r(d, &buf.de, &de);
-                if (r != 0)
-                        break;
-
-                if (!de)
-                        break;
-
-                if (!endswith(de->d_name, ".journal") &&
-                    !endswith(de->d_name, ".journal~"))
-                        continue;
-
-                if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
-                        continue;
-
-                if (!S_ISREG(st.st_mode))
-                        continue;
-
-                sum += (uint64_t) st.st_blocks * 512UL;
-        }
-
-        avail = sum >= m->max_use ? 0 : m->max_use - sum;
-
-        ss_avail = ss.f_bsize * ss.f_bavail;
-
-        ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free;
-
-        if (ss_avail < avail)
-                avail = ss_avail;
-
-        s->cached_available_space = avail;
-        s->cached_available_space_timestamp = ts;
-
-finish:
-        closedir(d);
-
-        return avail;
-}
-
-static void server_read_file_gid(Server *s) {
-        const char *adm = "adm";
-        int r;
-
-        assert(s);
-
-        if (s->file_gid_valid)
-                return;
-
-        r = get_group_creds(&adm, &s->file_gid);
-        if (r < 0)
-                log_warning("Failed to resolve 'adm' group: %s", strerror(-r));
-
-        /* if we couldn't read the gid, then it will be 0, but that's
-         * fine and we shouldn't try to resolve the group again, so
-         * let's just pretend it worked right-away. */
-        s->file_gid_valid = true;
-}
-
-static void server_fix_perms(Server *s, JournalFile *f, uid_t uid) {
-        int r;
-#ifdef HAVE_ACL
-        acl_t acl;
-        acl_entry_t entry;
-        acl_permset_t permset;
-#endif
-
-        assert(f);
-
-        server_read_file_gid(s);
-
-        r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid);
-        if (r < 0)
-                log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
-
-#ifdef HAVE_ACL
-        if (uid <= 0)
-                return;
-
-        acl = acl_get_fd(f->fd);
-        if (!acl) {
-                log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
-                return;
-        }
-
-        r = acl_find_uid(acl, uid, &entry);
-        if (r <= 0) {
-
-                if (acl_create_entry(&acl, &entry) < 0 ||
-                    acl_set_tag_type(entry, ACL_USER) < 0 ||
-                    acl_set_qualifier(entry, &uid) < 0) {
-                        log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
-                        goto finish;
-                }
-        }
-
-        if (acl_get_permset(entry, &permset) < 0 ||
-            acl_add_perm(permset, ACL_READ) < 0 ||
-            acl_calc_mask(&acl) < 0) {
-                log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
-                goto finish;
-        }
-
-        if (acl_set_fd(f->fd, acl) < 0)
-                log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
-
-finish:
-        acl_free(acl);
-#endif
-}
-
-static JournalFile* find_journal(Server *s, uid_t uid) {
-        char *p;
-        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 <= 0)
-                return s->system_journal;
-
-        r = sd_id128_get_machine(&machine);
-        if (r < 0)
-                return s->system_journal;
-
-        f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
-        if (f)
-                return f;
-
-        if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/user-%lu.journal",
-                     SD_ID128_FORMAT_VAL(machine), (unsigned long) uid) < 0)
-                return s->system_journal;
-
-        while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
-                /* Too many open? Then let's close one */
-                f = hashmap_steal_first(s->user_journals);
-                assert(f);
-                journal_file_close(f);
-        }
-
-        r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, s->system_journal, &f);
-        free(p);
-
-        if (r < 0)
-                return s->system_journal;
-
-        server_fix_perms(s, f, uid);
-
-        r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
-        if (r < 0) {
-                journal_file_close(f);
-                return s->system_journal;
-        }
-
-        return f;
-}
-
-static void server_rotate(Server *s) {
-        JournalFile *f;
-        void *k;
-        Iterator i;
-        int r;
-
-        log_debug("Rotating...");
-
-        if (s->runtime_journal) {
-                r = journal_file_rotate(&s->runtime_journal, s->compress, false);
-                if (r < 0)
-                        if (s->runtime_journal)
-                                log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
-                        else
-                                log_error("Failed to create new runtime journal: %s", strerror(-r));
-                else
-                        server_fix_perms(s, s->runtime_journal, 0);
-        }
-
-        if (s->system_journal) {
-                r = journal_file_rotate(&s->system_journal, s->compress, s->seal);
-                if (r < 0)
-                        if (s->system_journal)
-                                log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
-                        else
-                                log_error("Failed to create new system journal: %s", strerror(-r));
-
-                else
-                        server_fix_perms(s, s->system_journal, 0);
-        }
-
-        HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
-                r = journal_file_rotate(&f, s->compress, s->seal);
-                if (r < 0)
-                        if (f->path)
-                                log_error("Failed to rotate %s: %s", f->path, strerror(-r));
-                        else
-                                log_error("Failed to create user journal: %s", strerror(-r));
-                else {
-                        hashmap_replace(s->user_journals, k, f);
-                        server_fix_perms(s, f, PTR_TO_UINT32(k));
-                }
-        }
-}
-
-static void server_vacuum(Server *s) {
-        char *p;
-        char ids[33];
-        sd_id128_t machine;
-        int r;
-
-        log_debug("Vacuuming...");
-
-        s->oldest_file_usec = 0;
-
-        r = sd_id128_get_machine(&machine);
-        if (r < 0) {
-                log_error("Failed to get machine ID: %s", strerror(-r));
-                return;
-        }
-
-        sd_id128_to_string(machine, ids);
-
-        if (s->system_journal) {
-                p = strappend("/var/log/journal/", ids);
-                if (!p) {
-                        log_oom();
-                        return;
-                }
-
-                r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec);
-                if (r < 0 && r != -ENOENT)
-                        log_error("Failed to vacuum %s: %s", p, strerror(-r));
-                free(p);
-        }
-
-        if (s->runtime_journal) {
-                p = strappend("/run/log/journal/", ids);
-                if (!p) {
-                        log_oom();
-                        return;
-                }
-
-                r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec);
-                if (r < 0 && r != -ENOENT)
-                        log_error("Failed to vacuum %s: %s", p, strerror(-r));
-                free(p);
-        }
-
-        s->cached_available_space_timestamp = 0;
-}
-
-static char *shortened_cgroup_path(pid_t pid) {
-        int r;
-        char *process_path, *init_path, *path;
-
-        assert(pid > 0);
-
-        r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path);
-        if (r < 0)
-                return NULL;
-
-        r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path);
-        if (r < 0) {
-                free(process_path);
-                return NULL;
-        }
-
-        if (endswith(init_path, "/system"))
-                init_path[strlen(init_path) - 7] = 0;
-        else if (streq(init_path, "/"))
-                init_path[0] = 0;
-
-        if (startswith(process_path, init_path)) {
-                char *p;
-
-                p = strdup(process_path + strlen(init_path));
-                if (!p) {
-                        free(process_path);
-                        free(init_path);
-                        return NULL;
-                }
-                path = p;
-        } else {
-                path = process_path;
-                process_path = NULL;
-        }
-
-        free(process_path);
-        free(init_path);
-
-        return path;
-}
-
-static bool shall_try_append_again(JournalFile *f, int r) {
-
-        /* -E2BIG            Hit configured limit
-           -EFBIG            Hit fs limit
-           -EDQUOT           Quota limit hit
-           -ENOSPC           Disk full
-           -EHOSTDOWN        Other machine
-           -EBUSY            Unclean shutdown
-           -EPROTONOSUPPORT  Unsupported feature
-           -EBADMSG          Corrupted
-           -ENODATA          Truncated
-           -ESHUTDOWN        Already archived */
-
-        if (r == -E2BIG || r == -EFBIG || r == -EDQUOT || r == -ENOSPC)
-                log_debug("%s: Allocation limit reached, rotating.", f->path);
-        else if (r == -EHOSTDOWN)
-                log_info("%s: Journal file from other machine, rotating.", f->path);
-        else if (r == -EBUSY)
-                log_info("%s: Unclean shutdown, rotating.", f->path);
-        else if (r == -EPROTONOSUPPORT)
-                log_info("%s: Unsupported feature, rotating.", f->path);
-        else if (r == -EBADMSG || r == -ENODATA || r == ESHUTDOWN)
-                log_warning("%s: Journal file corrupted, rotating.", f->path);
-        else
-                return false;
-
-        return true;
-}
-
-static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, unsigned n) {
-        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);
-                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)
-                return;
-
-        if (vacuumed || !shall_try_append_again(f, r)) {
-                log_error("Failed to write entry, ignoring: %s", strerror(-r));
-                return;
-        }
-
-        server_rotate(s);
-        server_vacuum(s);
-
-        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("Failed to write entry, ignoring: %s", strerror(-r));
-}
-
-static void dispatch_message_real(
-                Server *s,
-                struct iovec *iovec, unsigned n, unsigned m,
-                struct ucred *ucred,
-                struct timeval *tv,
-                const char *label, size_t label_len,
-                const char *unit_id) {
-
-        char *pid = NULL, *uid = NULL, *gid = NULL,
-                *source_time = NULL, *boot_id = NULL, *machine_id = NULL,
-                *comm = NULL, *cmdline = NULL, *hostname = NULL,
-                *audit_session = NULL, *audit_loginuid = NULL,
-                *exe = NULL, *cgroup = NULL, *session = NULL,
-                *owner_uid = NULL, *unit = NULL, *selinux_context = NULL;
-
-        char idbuf[33];
-        sd_id128_t id;
-        int r;
-        char *t;
-        uid_t loginuid = 0, realuid = 0;
-
-        assert(s);
-        assert(iovec);
-        assert(n > 0);
-        assert(n + N_IOVEC_META_FIELDS <= m);
-
-        if (ucred) {
-                uint32_t audit;
-#ifdef HAVE_LOGIND
-                uid_t owner;
-#endif
-
-                realuid = ucred->uid;
-
-                if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
-                        IOVEC_SET_STRING(iovec[n++], pid);
-
-                if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
-                        IOVEC_SET_STRING(iovec[n++], uid);
-
-                if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
-                        IOVEC_SET_STRING(iovec[n++], gid);
-
-                r = get_process_comm(ucred->pid, &t);
-                if (r >= 0) {
-                        comm = strappend("_COMM=", t);
-                        free(t);
-
-                        if (comm)
-                                IOVEC_SET_STRING(iovec[n++], comm);
-                }
-
-                r = get_process_exe(ucred->pid, &t);
-                if (r >= 0) {
-                        exe = strappend("_EXE=", t);
-                        free(t);
-
-                        if (exe)
-                                IOVEC_SET_STRING(iovec[n++], exe);
-                }
-
-                r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
-                if (r >= 0) {
-                        cmdline = strappend("_CMDLINE=", t);
-                        free(t);
-
-                        if (cmdline)
-                                IOVEC_SET_STRING(iovec[n++], cmdline);
-                }
-
-                r = audit_session_from_pid(ucred->pid, &audit);
-                if (r >= 0)
-                        if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0)
-                                IOVEC_SET_STRING(iovec[n++], audit_session);
-
-                r = audit_loginuid_from_pid(ucred->pid, &loginuid);
-                if (r >= 0)
-                        if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
-                                IOVEC_SET_STRING(iovec[n++], audit_loginuid);
-
-                t = shortened_cgroup_path(ucred->pid);
-                if (t) {
-                        cgroup = strappend("_SYSTEMD_CGROUP=", t);
-                        free(t);
-
-                        if (cgroup)
-                                IOVEC_SET_STRING(iovec[n++], cgroup);
-                }
-
-#ifdef HAVE_LOGIND
-                if (sd_pid_get_session(ucred->pid, &t) >= 0) {
-                        session = strappend("_SYSTEMD_SESSION=", t);
-                        free(t);
-
-                        if (session)
-                                IOVEC_SET_STRING(iovec[n++], session);
-                }
-
-                if (sd_pid_get_owner_uid(ucred->uid, &owner) >= 0)
-                        if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0)
-                                IOVEC_SET_STRING(iovec[n++], owner_uid);
-#endif
-
-                if (cg_pid_get_unit(ucred->pid, &t) >= 0) {
-                        unit = strappend("_SYSTEMD_UNIT=", t);
-                        free(t);
-                } else if (unit_id)
-                        unit = strappend("_SYSTEMD_UNIT=", unit_id);
-
-                if (unit)
-                        IOVEC_SET_STRING(iovec[n++], unit);
-
-#ifdef HAVE_SELINUX
-                if (label) {
-                        selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len);
-                        if (selinux_context) {
-                                memcpy(selinux_context, "_SELINUX_CONTEXT=", sizeof("_SELINUX_CONTEXT=")-1);
-                                memcpy(selinux_context+sizeof("_SELINUX_CONTEXT=")-1, label, label_len);
-                                selinux_context[sizeof("_SELINUX_CONTEXT=")-1+label_len] = 0;
-                                IOVEC_SET_STRING(iovec[n++], selinux_context);
-                        }
-                } else {
-                        security_context_t con;
-
-                        if (getpidcon(ucred->pid, &con) >= 0) {
-                                selinux_context = strappend("_SELINUX_CONTEXT=", con);
-                                if (selinux_context)
-                                        IOVEC_SET_STRING(iovec[n++], selinux_context);
-
-                                freecon(con);
-                        }
-                }
-#endif
-        }
-
-        if (tv) {
-                if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
-                             (unsigned long long) timeval_load(tv)) >= 0)
-                        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. */
-        r = sd_id128_get_boot(&id);
-        if (r >= 0)
-                if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
-                        IOVEC_SET_STRING(iovec[n++], boot_id);
-
-        r = sd_id128_get_machine(&id);
-        if (r >= 0)
-                if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
-                        IOVEC_SET_STRING(iovec[n++], machine_id);
-
-        t = gethostname_malloc();
-        if (t) {
-                hostname = strappend("_HOSTNAME=", t);
-                free(t);
-                if (hostname)
-                        IOVEC_SET_STRING(iovec[n++], hostname);
-        }
-
-        assert(n <= m);
-
-        write_to_journal(s,
-                         s->split_mode == SPLIT_NONE ? 0 :
-                         (s->split_mode == SPLIT_UID ? realuid :
-                          (realuid == 0 ? 0 : loginuid)), iovec, n);
-
-        free(pid);
-        free(uid);
-        free(gid);
-        free(comm);
-        free(exe);
-        free(cmdline);
-        free(source_time);
-        free(boot_id);
-        free(machine_id);
-        free(hostname);
-        free(audit_session);
-        free(audit_loginuid);
-        free(cgroup);
-        free(session);
-        free(owner_uid);
-        free(unit);
-        free(selinux_context);
-}
-
-void server_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=6");
-        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);
-
-        if (!sd_id128_equal(message_id, SD_ID128_NULL)) {
-                snprintf(mid, sizeof(mid), MESSAGE_ID(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, NULL, 0, NULL);
-}
-
-void server_dispatch_message(
-                Server *s,
-                struct iovec *iovec, unsigned n, unsigned m,
-                struct ucred *ucred,
-                struct timeval *tv,
-                const char *label, size_t label_len,
-                const char *unit_id,
-                int priority) {
-
-        int rl;
-        char *path = NULL, *c;
-
-        assert(s);
-        assert(iovec || n == 0);
-
-        if (n == 0)
-                return;
-
-        if (LOG_PRI(priority) > s->max_level_store)
-                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)
-                server_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, label, label_len, unit_id);
-}
-
-
-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 &&
-            (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) &&
-            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("/var/log/journal/", 0755);
-
-                fn = strappend("/var/log/journal/", ids);
-                if (!fn)
-                        return -ENOMEM;
-
-                (void) mkdir(fn, 0755);
-                free(fn);
-
-                fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL);
-                if (!fn)
-                        return -ENOMEM;
-
-                r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal);
-                free(fn);
-
-                if (r >= 0) {
-                        char fb[FORMAT_BYTES_MAX];
-
-                        server_fix_perms(s, s->system_journal, 0);
-                        server_driver_message(s, SD_ID128_NULL, "Allowing system journal files to grow to %s.",
-                                              format_bytes(fb, sizeof(fb), s->system_metrics.max_use));
-
-                } 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 &&
-            (s->storage != STORAGE_NONE)) {
-
-                fn = strjoin("/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, s->compress, false, &s->runtime_metrics, s->mmap, 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_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, false, &s->runtime_metrics, s->mmap, 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) {
-                        char fb[FORMAT_BYTES_MAX];
-
-                        server_fix_perms(s, s->runtime_journal, 0);
-                        server_driver_message(s, SD_ID128_NULL, "Allowing runtime journal files to grow to %s.",
-                                              format_bytes(fb, sizeof(fb), s->runtime_metrics.max_use));
-                }
-        }
-
-        return r;
-}
-
-static int server_flush_to_var(Server *s) {
-        int r;
-        sd_id128_t machine;
-        sd_journal *j = NULL;
-
-        assert(s);
-
-        if (s->storage != STORAGE_AUTO &&
-            s->storage != STORAGE_PERSISTENT)
-                return 0;
-
-        if (!s->runtime_journal)
-                return 0;
-
-        system_journal_open(s);
-
-        if (!s->system_journal)
-                return 0;
-
-        log_debug("Flushing to /var...");
-
-        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) {
-                Object *o = NULL;
-                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 >= 0)
-                        continue;
-
-                if (!shall_try_append_again(s->system_journal, r)) {
-                        log_error("Can't write entry: %s", strerror(-r));
-                        goto finish;
-                }
-
-                server_rotate(s);
-                server_vacuum(s);
-
-                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("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)
-                rm_rf("/run/log/journal", false, true, false);
-
-        if (j)
-                sd_journal_close(j);
-
-        return r;
-}
-
-static int process_event(Server *s, struct epoll_event *ev) {
-        assert(s);
-        assert(ev);
-
-        if (ev->data.fd == s->signal_fd) {
-                struct signalfd_siginfo sfsi;
-                ssize_t n;
-
-                if (ev->events != EPOLLIN) {
-                        log_error("Got invalid event from epoll.");
-                        return -EIO;
-                }
-
-                n = read(s->signal_fd, &sfsi, sizeof(sfsi));
-                if (n != sizeof(sfsi)) {
-
-                        if (n >= 0)
-                                return -EIO;
-
-                        if (errno == EINTR || errno == EAGAIN)
-                                return 1;
-
-                        return -errno;
-                }
-
-                log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo));
-
-                if (sfsi.ssi_signo == SIGUSR1) {
-                        touch("/run/systemd/journal/flushed");
-                        server_flush_to_var(s);
-                        return 1;
-                }
-
-                if (sfsi.ssi_signo == SIGUSR2) {
-                        server_rotate(s);
-                        server_vacuum(s);
-                        return 1;
-                }
-
-                return 0;
-
-        } else if (ev->data.fd == s->dev_kmsg_fd) {
-                int r;
-
-                if (ev->events != EPOLLIN) {
-                        log_error("Got invalid event from epoll.");
-                        return -EIO;
-                }
-
-                r = server_read_dev_kmsg(s);
-                if (r < 0)
-                        return r;
-
-                return 1;
-
-        } else if (ev->data.fd == s->native_fd ||
-                   ev->data.fd == s->syslog_fd) {
-
-                if (ev->events != EPOLLIN) {
-                        log_error("Got invalid event from epoll.");
-                        return -EIO;
-                }
-
-                for (;;) {
-                        struct msghdr msghdr;
-                        struct iovec iovec;
-                        struct ucred *ucred = NULL;
-                        struct timeval *tv = NULL;
-                        struct cmsghdr *cmsg;
-                        char *label = NULL;
-                        size_t label_len = 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;
-                        ssize_t n;
-                        int v;
-                        int *fds = NULL;
-                        unsigned n_fds = 0;
-
-                        if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
-                                log_error("SIOCINQ failed: %m");
-                                return -errno;
-                        }
-
-                        if (s->buffer_size < (size_t) v) {
-                                void *b;
-                                size_t l;
-
-                                l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2);
-                                b = realloc(s->buffer, l+1);
-
-                                if (!b) {
-                                        log_error("Couldn't increase buffer.");
-                                        return -ENOMEM;
-                                }
-
-                                s->buffer_size = l;
-                                s->buffer = b;
-                        }
-
-                        zero(iovec);
-                        iovec.iov_base = s->buffer;
-                        iovec.iov_len = s->buffer_size;
-
-                        zero(control);
-                        zero(msghdr);
-                        msghdr.msg_iov = &iovec;
-                        msghdr.msg_iovlen = 1;
-                        msghdr.msg_control = &control;
-                        msghdr.msg_controllen = sizeof(control);
-
-                        n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
-                        if (n < 0) {
-
-                                if (errno == EINTR || errno == EAGAIN)
-                                        return 1;
-
-                                log_error("recvmsg() failed: %m");
-                                return -errno;
-                        }
-
-                        for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
-
-                                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);
-                                }
-                        }
-
-                        if (ev->data.fd == s->syslog_fd) {
-                                char *e;
-
-                                if (n > 0 && n_fds == 0) {
-                                        e = memchr(s->buffer, '\n', n);
-                                        if (e)
-                                                *e = 0;
-                                        else
-                                                s->buffer[n] = 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 (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.");
-                        }
-
-                        close_many(fds, n_fds);
-                }
-
-                return 1;
-
-        } else if (ev->data.fd == s->stdout_fd) {
-
-                if (ev->events != EPOLLIN) {
-                        log_error("Got invalid event from epoll.");
-                        return -EIO;
-                }
-
-                stdout_stream_new(s);
-                return 1;
-
-        } else {
-                StdoutStream *stream;
-
-                if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
-                        log_error("Got invalid event from epoll.");
-                        return -EIO;
-                }
-
-                /* If it is none of the well-known fds, it must be an
-                 * stdout stream fd. Note that this is a bit ugly here
-                 * (since we rely that none of the well-known fds
-                 * could be interpreted as pointer), but nonetheless
-                 * safe, since the well-known fds would never get an
-                 * fd > 4096, i.e. beyond the first memory page */
-
-                stream = ev->data.ptr;
-
-                if (stdout_stream_process(stream) <= 0)
-                        stdout_stream_free(stream);
-
-                return 1;
-        }
-
-        log_error("Unknown event.");
-        return 0;
-}
-
-static int open_signalfd(Server *s) {
-        sigset_t mask;
-        struct epoll_event ev;
-
-        assert(s);
-
-        assert_se(sigemptyset(&mask) == 0);
-        sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1);
-        assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
-
-        s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
-        if (s->signal_fd < 0) {
-                log_error("signalfd(): %m");
-                return -errno;
-        }
-
-        zero(ev);
-        ev.events = EPOLLIN;
-        ev.data.fd = s->signal_fd;
-
-        if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) {
-                log_error("epoll_ctl(): %m");
-                return -errno;
-        }
-
-        return 0;
-}
-
-static int server_parse_proc_cmdline(Server *s) {
-        char *line, *w, *state;
-        int r;
-        size_t l;
-
-        if (detect_container(NULL) > 0)
-                return 0;
-
-        r = read_one_line_file("/proc/cmdline", &line);
-        if (r < 0) {
-                log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
-                return 0;
-        }
-
-        FOREACH_WORD_QUOTED(w, l, line, state) {
-                char *word;
-
-                word = strndup(w, l);
-                if (!word) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                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"))
-                        log_warning("Invalid systemd.journald parameter. Ignoring.");
-
-                free(word);
-        }
-
-        r = 0;
-
-finish:
-        free(line);
-        return r;
-}
-
-static int server_parse_config_file(Server *s) {
-        FILE *f;
-        const char *fn;
-        int r;
-
-        assert(s);
-
-        fn = "/etc/systemd/journald.conf";
-        f = fopen(fn, "re");
-        if (!f) {
-                if (errno == ENOENT)
-                        return 0;
-
-                log_warning("Failed to open configuration file %s: %m", fn);
-                return -errno;
-        }
-
-        r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, (void*) journald_gperf_lookup, false, s);
-        if (r < 0)
-                log_warning("Failed to parse configuration file: %s", strerror(-r));
-
-        fclose(f);
-
-        return r;
-}
-
-static int server_init(Server *s) {
-        int n, r, fd;
-
-        assert(s);
-
-        zero(*s);
-        s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1;
-        s->compress = true;
-        s->seal = true;
-
-        s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL;
-        s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST;
-
-        s->forward_to_syslog = true;
-
-        s->max_level_store = LOG_DEBUG;
-        s->max_level_syslog = LOG_DEBUG;
-        s->max_level_kmsg = LOG_NOTICE;
-        s->max_level_console = LOG_INFO;
-
-        memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
-        memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
-
-        server_parse_config_file(s);
-        server_parse_proc_cmdline(s);
-
-        mkdir_p("/run/systemd/journal", 0755);
-
-        s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
-        if (!s->user_journals)
-                return log_oom();
-
-        s->mmap = mmap_cache_new();
-        if (!s->mmap)
-                return log_oom();
-
-        s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
-        if (s->epoll_fd < 0) {
-                log_error("Failed to create epoll object: %m");
-                return -errno;
-        }
-
-        n = sd_listen_fds(true);
-        if (n < 0) {
-                log_error("Failed to read listening file descriptors from environment: %s", strerror(-n));
-                return n;
-        }
-
-        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) {
-
-                        if (s->syslog_fd >= 0) {
-                                log_error("Too many /dev/log sockets passed.");
-                                return -EINVAL;
-                        }
-
-                        s->syslog_fd = fd;
-
-                } else {
-                        log_error("Unknown socket passed.");
-                        return -EINVAL;
-                }
-        }
-
-        r = server_open_syslog_socket(s);
-        if (r < 0)
-                return r;
-
-        r = server_open_native_socket(s);
-        if (r < 0)
-                return r;
-
-        r = server_open_stdout_socket(s);
-        if (r < 0)
-                return r;
-
-        r = server_open_dev_kmsg(s);
-        if (r < 0)
-                return r;
-
-        r = server_open_kernel_seqnum(s);
-        if (r < 0)
-                return r;
-
-        r = open_signalfd(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 = system_journal_open(s);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-static 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);
-
-        HASHMAP_FOREACH(f, s->user_journals, i)
-                journal_file_maybe_append_tag(f, n);
-#endif
-}
-
-static void server_done(Server *s) {
-        JournalFile *f;
-        assert(s);
-
-        while (s->stdout_streams)
-                stdout_stream_free(s->stdout_streams);
-
-        if (s->system_journal)
-                journal_file_close(s->system_journal);
-
-        if (s->runtime_journal)
-                journal_file_close(s->runtime_journal);
-
-        while ((f = hashmap_steal_first(s->user_journals)))
-                journal_file_close(f);
-
-        hashmap_free(s->user_journals);
-
-        if (s->epoll_fd >= 0)
-                close_nointr_nofail(s->epoll_fd);
-
-        if (s->signal_fd >= 0)
-                close_nointr_nofail(s->signal_fd);
-
-        if (s->syslog_fd >= 0)
-                close_nointr_nofail(s->syslog_fd);
-
-        if (s->native_fd >= 0)
-                close_nointr_nofail(s->native_fd);
-
-        if (s->stdout_fd >= 0)
-                close_nointr_nofail(s->stdout_fd);
-
-        if (s->dev_kmsg_fd >= 0)
-                close_nointr_nofail(s->dev_kmsg_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);
-
-        if (s->mmap)
-                mmap_cache_unref(s->mmap);
-
-        if (s->udev)
-                udev_unref(s->udev);
-}
 
 int main(int argc, char *argv[]) {
         Server server;