2011-10-07 21:06:39 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/epoll.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <sys/signalfd.h>
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#include <unistd.h>
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#include <fcntl.h>
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2011-10-07 23:03:07 +02:00
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#include <sys/acl.h>
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#include <acl/libacl.h>
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2011-12-17 00:56:34 +01:00
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#include <stddef.h>
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#include <sys/ioctl.h>
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#include <linux/sockios.h>
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2011-10-07 21:06:39 +02:00
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#include "hashmap.h"
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2011-10-08 02:20:44 +02:00
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#include "journal-file.h"
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2011-10-07 21:06:39 +02:00
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#include "sd-daemon.h"
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#include "socket-util.h"
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2011-10-07 23:03:07 +02:00
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#include "acl-util.h"
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2011-10-12 05:28:39 +02:00
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#include "cgroup-util.h"
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2011-10-07 21:06:39 +02:00
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2011-12-17 01:13:55 +01:00
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#define USER_JOURNALS_MAX 1024
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2011-10-07 21:06:39 +02:00
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typedef struct Server {
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int epoll_fd;
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int signal_fd;
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2011-12-17 00:56:34 +01:00
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int syslog_fd;
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int native_fd;
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2011-10-07 21:06:39 +02:00
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2011-10-07 23:03:07 +02:00
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JournalFile *runtime_journal;
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2011-10-07 21:06:39 +02:00
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JournalFile *system_journal;
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Hashmap *user_journals;
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2011-10-14 05:12:58 +02:00
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uint64_t seqnum;
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2011-12-17 00:56:34 +01:00
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char *buffer;
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size_t buffer_size;
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2011-12-20 02:38:36 +01:00
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JournalMetrics metrics;
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uint64_t max_use;
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2011-12-21 02:40:59 +01:00
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bool compress;
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2011-10-07 21:06:39 +02:00
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} Server;
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2011-10-07 23:03:07 +02:00
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static void fix_perms(JournalFile *f, uid_t uid) {
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acl_t acl;
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acl_entry_t entry;
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acl_permset_t permset;
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int r;
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assert(f);
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r = fchmod_and_fchown(f->fd, 0640, 0, 0);
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if (r < 0)
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log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
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if (uid <= 0)
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return;
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acl = acl_get_fd(f->fd);
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if (!acl) {
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log_warning("Failed to read ACL on %s, ignoring: %m", f->path);
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return;
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}
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r = acl_find_uid(acl, uid, &entry);
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if (r <= 0) {
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if (acl_create_entry(&acl, &entry) < 0 ||
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acl_set_tag_type(entry, ACL_USER) < 0 ||
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acl_set_qualifier(entry, &uid) < 0) {
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log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
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goto finish;
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}
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}
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if (acl_get_permset(entry, &permset) < 0 ||
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acl_add_perm(permset, ACL_READ) < 0 ||
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acl_calc_mask(&acl) < 0) {
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log_warning("Failed to patch ACL on %s, ignoring: %m", f->path);
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goto finish;
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}
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if (acl_set_fd(f->fd, acl) < 0)
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log_warning("Failed to set ACL on %s, ignoring: %m", f->path);
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finish:
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acl_free(acl);
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}
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static JournalFile* find_journal(Server *s, uid_t uid) {
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char *p;
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int r;
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JournalFile *f;
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2011-10-14 04:44:50 +02:00
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char ids[33];
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sd_id128_t machine;
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2011-10-07 23:03:07 +02:00
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assert(s);
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/* We split up user logs only on /var, not on /run */
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if (!s->system_journal)
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return s->runtime_journal;
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if (uid <= 0)
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return s->system_journal;
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2011-10-14 04:44:50 +02:00
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r = sd_id128_get_machine(&machine);
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if (r < 0)
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return s->system_journal;
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2011-10-07 23:03:07 +02:00
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f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid));
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if (f)
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return f;
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2011-10-14 04:44:50 +02:00
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if (asprintf(&p, "/var/log/journal/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (unsigned long) uid) < 0)
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2011-10-07 23:03:07 +02:00
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return s->system_journal;
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2011-12-17 01:13:55 +01:00
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while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) {
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/* Too many open? Then let's close one */
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f = hashmap_steal_first(s->user_journals);
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assert(f);
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journal_file_close(f);
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}
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2011-10-14 05:12:58 +02:00
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r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
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2011-10-07 23:03:07 +02:00
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free(p);
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if (r < 0)
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return s->system_journal;
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fix_perms(f, uid);
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2011-12-21 02:40:59 +01:00
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f->metrics = s->metrics;
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f->compress = s->compress;
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2011-10-07 23:03:07 +02:00
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r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
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if (r < 0) {
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journal_file_close(f);
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return s->system_journal;
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}
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return f;
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}
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2011-12-20 02:38:36 +01:00
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static void server_vacuum(Server *s) {
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Iterator i;
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void *k;
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char *p;
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char ids[33];
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sd_id128_t machine;
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int r;
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JournalFile *f;
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log_info("Rotating...");
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if (s->runtime_journal) {
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r = journal_file_rotate(&s->runtime_journal);
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if (r < 0)
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log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
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}
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if (s->system_journal) {
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r = journal_file_rotate(&s->system_journal);
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if (r < 0)
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log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
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}
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HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
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r = journal_file_rotate(&f);
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if (r < 0)
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log_error("Failed to rotate %s: %s", f->path, strerror(-r));
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else
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hashmap_replace(s->user_journals, k, f);
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}
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log_info("Vacuuming...");
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r = sd_id128_get_machine(&machine);
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if (r < 0) {
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log_error("Failed to get machine ID: %s", strerror(-r));
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return;
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}
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if (asprintf(&p, "/var/log/journal/%s", sd_id128_to_string(machine, ids)) < 0) {
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log_error("Out of memory.");
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return;
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}
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r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
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if (r < 0 && r != -ENOENT)
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log_error("Failed to vacuum %s: %s", p, strerror(-r));
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free(p);
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if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
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log_error("Out of memory.");
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return;
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}
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r = journal_directory_vacuum(p, s->max_use, s->metrics.keep_free);
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if (r < 0 && r != -ENOENT)
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log_error("Failed to vacuum %s: %s", p, strerror(-r));
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free(p);
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}
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2011-12-17 00:56:34 +01:00
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static void dispatch_message(Server *s, struct iovec *iovec, unsigned n, unsigned m, struct ucred *ucred, struct timeval *tv) {
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char *pid = NULL, *uid = NULL, *gid = NULL,
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2011-10-07 21:06:39 +02:00
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*source_time = NULL, *boot_id = NULL, *machine_id = NULL,
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*comm = NULL, *cmdline = NULL, *hostname = NULL,
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*audit_session = NULL, *audit_loginuid = NULL,
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2011-10-12 05:28:39 +02:00
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*exe = NULL, *cgroup = NULL;
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2011-12-17 00:56:34 +01:00
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2011-10-07 21:06:39 +02:00
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char idbuf[33];
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sd_id128_t id;
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int r;
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char *t;
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2011-11-08 18:20:03 +01:00
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uid_t loginuid = 0, realuid = 0;
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2011-10-07 23:03:07 +02:00
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JournalFile *f;
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2011-12-20 02:38:36 +01:00
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bool vacuumed = false;
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2011-10-07 21:06:39 +02:00
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2011-12-17 00:56:34 +01:00
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assert(s);
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assert(iovec || n == 0);
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2011-10-07 21:06:39 +02:00
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2011-12-17 00:56:34 +01:00
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if (n == 0)
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return;
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2011-10-07 21:06:39 +02:00
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2011-12-17 00:56:34 +01:00
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assert(n + 13 <= m);
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2011-10-07 21:06:39 +02:00
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if (ucred) {
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uint32_t session;
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2011-10-12 05:28:39 +02:00
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char *path;
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2011-10-07 21:06:39 +02:00
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2011-11-08 18:20:03 +01:00
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realuid = ucred->uid;
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if (asprintf(&pid, "_PID=%lu", (unsigned long) ucred->pid) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], pid);
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2011-11-08 18:20:03 +01:00
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if (asprintf(&uid, "_UID=%lu", (unsigned long) ucred->uid) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], uid);
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2011-11-08 18:20:03 +01:00
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if (asprintf(&gid, "_GID=%lu", (unsigned long) ucred->gid) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], gid);
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r = get_process_comm(ucred->pid, &t);
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if (r >= 0) {
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2011-11-08 18:20:03 +01:00
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comm = strappend("_COMM=", t);
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2011-10-07 21:06:39 +02:00
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if (comm)
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IOVEC_SET_STRING(iovec[n++], comm);
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free(t);
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}
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r = get_process_exe(ucred->pid, &t);
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if (r >= 0) {
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2011-11-08 18:20:03 +01:00
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exe = strappend("_EXE=", t);
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2011-10-07 21:06:39 +02:00
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if (comm)
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IOVEC_SET_STRING(iovec[n++], exe);
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free(t);
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}
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r = get_process_cmdline(ucred->pid, LINE_MAX, false, &t);
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if (r >= 0) {
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2011-11-08 18:20:03 +01:00
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cmdline = strappend("_CMDLINE=", t);
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2011-10-07 21:06:39 +02:00
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if (cmdline)
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IOVEC_SET_STRING(iovec[n++], cmdline);
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free(t);
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}
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r = audit_session_from_pid(ucred->pid, &session);
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if (r >= 0)
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2011-11-08 18:20:03 +01:00
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if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) session) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], audit_session);
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r = audit_loginuid_from_pid(ucred->pid, &loginuid);
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if (r >= 0)
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2011-11-08 18:20:03 +01:00
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if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], audit_loginuid);
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2011-10-12 05:28:39 +02:00
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r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, ucred->pid, &path);
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if (r >= 0) {
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2011-11-08 18:20:03 +01:00
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cgroup = strappend("_SYSTEMD_CGROUP=", path);
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2011-10-12 05:28:39 +02:00
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if (cgroup)
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IOVEC_SET_STRING(iovec[n++], cgroup);
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free(path);
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}
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2011-10-07 21:06:39 +02:00
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}
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if (tv) {
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2011-11-08 18:20:03 +01:00
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if (asprintf(&source_time, "_SOURCE_REALTIME_TIMESTAMP=%llu",
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2011-10-07 21:06:39 +02:00
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(unsigned long long) timeval_load(tv)) >= 0)
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IOVEC_SET_STRING(iovec[n++], source_time);
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}
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2011-10-12 05:06:09 +02:00
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/* Note that strictly speaking storing the boot id here is
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* redundant since the entry includes this in-line
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* anyway. However, we need this indexed, too. */
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2011-10-07 21:06:39 +02:00
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r = sd_id128_get_boot(&id);
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if (r >= 0)
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2011-11-08 18:20:03 +01:00
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if (asprintf(&boot_id, "_BOOT_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
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2011-10-07 21:06:39 +02:00
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IOVEC_SET_STRING(iovec[n++], boot_id);
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r = sd_id128_get_machine(&id);
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if (r >= 0)
|
2011-11-08 18:20:03 +01:00
|
|
|
if (asprintf(&machine_id, "_MACHINE_ID=%s", sd_id128_to_string(id, idbuf)) >= 0)
|
2011-10-07 21:06:39 +02:00
|
|
|
IOVEC_SET_STRING(iovec[n++], machine_id);
|
|
|
|
|
|
|
|
t = gethostname_malloc();
|
|
|
|
if (t) {
|
2011-11-08 18:20:03 +01:00
|
|
|
hostname = strappend("_HOSTNAME=", t);
|
2011-10-07 21:06:39 +02:00
|
|
|
if (hostname)
|
|
|
|
IOVEC_SET_STRING(iovec[n++], hostname);
|
|
|
|
free(t);
|
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
assert(n <= m);
|
|
|
|
|
2011-12-20 02:38:36 +01:00
|
|
|
retry:
|
2011-11-08 18:20:03 +01:00
|
|
|
f = find_journal(s, realuid == 0 ? 0 : loginuid);
|
2011-10-07 23:03:07 +02:00
|
|
|
if (!f)
|
|
|
|
log_warning("Dropping message, as we can't find a place to store the data.");
|
|
|
|
else {
|
2011-10-14 05:12:58 +02:00
|
|
|
r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
|
2011-10-07 21:06:39 +02:00
|
|
|
|
2011-12-20 02:38:36 +01:00
|
|
|
if (r == -E2BIG && !vacuumed) {
|
|
|
|
log_info("Allocation limit reached.");
|
|
|
|
|
|
|
|
server_vacuum(s);
|
|
|
|
vacuumed = true;
|
|
|
|
|
|
|
|
log_info("Retrying write.");
|
|
|
|
goto retry;
|
|
|
|
}
|
|
|
|
|
2011-10-07 23:03:07 +02:00
|
|
|
if (r < 0)
|
|
|
|
log_error("Failed to write entry, ignoring: %s", strerror(-r));
|
|
|
|
}
|
2011-10-07 21:06:39 +02:00
|
|
|
|
|
|
|
free(pid);
|
|
|
|
free(uid);
|
|
|
|
free(gid);
|
|
|
|
free(comm);
|
2011-10-12 05:28:39 +02:00
|
|
|
free(exe);
|
2011-10-07 21:06:39 +02:00
|
|
|
free(cmdline);
|
|
|
|
free(source_time);
|
|
|
|
free(boot_id);
|
|
|
|
free(machine_id);
|
|
|
|
free(hostname);
|
|
|
|
free(audit_session);
|
|
|
|
free(audit_loginuid);
|
2011-12-17 00:56:34 +01:00
|
|
|
free(cgroup);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
|
|
|
|
char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
|
|
|
|
struct iovec iovec[16];
|
|
|
|
unsigned n = 0;
|
|
|
|
int priority = LOG_USER | LOG_INFO;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
assert(buf);
|
|
|
|
|
|
|
|
parse_syslog_priority((char**) &buf, &priority);
|
|
|
|
skip_syslog_date((char**) &buf);
|
|
|
|
|
|
|
|
if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
|
|
|
|
IOVEC_SET_STRING(iovec[n++], syslog_priority);
|
|
|
|
|
|
|
|
if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
|
|
|
|
IOVEC_SET_STRING(iovec[n++], syslog_facility);
|
|
|
|
|
|
|
|
message = strappend("MESSAGE=", buf);
|
|
|
|
if (message)
|
|
|
|
IOVEC_SET_STRING(iovec[n++], message);
|
|
|
|
|
|
|
|
dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv);
|
|
|
|
|
|
|
|
free(message);
|
2011-10-07 21:06:39 +02:00
|
|
|
free(syslog_facility);
|
|
|
|
free(syslog_priority);
|
2011-12-17 00:56:34 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
|
|
|
|
struct iovec *iovec = NULL;
|
|
|
|
unsigned n = 0, m = 0, j;
|
|
|
|
const char *p;
|
|
|
|
size_t remaining;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
assert(buffer || n == 0);
|
|
|
|
|
|
|
|
p = buffer;
|
|
|
|
remaining = buffer_size;
|
|
|
|
|
|
|
|
while (remaining > 0) {
|
|
|
|
const char *e, *q;
|
|
|
|
|
|
|
|
e = memchr(p, '\n', remaining);
|
|
|
|
|
|
|
|
if (!e) {
|
|
|
|
/* Trailing noise, let's ignore it, and flush what we collected */
|
|
|
|
log_debug("Received message with trailing noise, ignoring.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (e == p) {
|
|
|
|
/* Entry separator */
|
|
|
|
dispatch_message(s, iovec, n, m, ucred, tv);
|
|
|
|
n = 0;
|
|
|
|
|
|
|
|
p++;
|
|
|
|
remaining--;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (*p == '.') {
|
|
|
|
/* Control command, ignore for now */
|
|
|
|
remaining -= (e - p) + 1;
|
|
|
|
p = e + 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* A property follows */
|
|
|
|
|
|
|
|
if (n+13 >= m) {
|
|
|
|
struct iovec *c;
|
|
|
|
unsigned u;
|
|
|
|
|
|
|
|
u = MAX((n+13U) * 2U, 4U);
|
|
|
|
c = realloc(iovec, u * sizeof(struct iovec));
|
|
|
|
if (!c) {
|
|
|
|
log_error("Out of memory");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
iovec = c;
|
|
|
|
m = u;
|
|
|
|
}
|
|
|
|
|
|
|
|
q = memchr(p, '=', e - p);
|
|
|
|
if (q) {
|
2011-12-17 01:36:47 +01:00
|
|
|
if (p[0] != '_') {
|
|
|
|
/* If the field name starts with an
|
|
|
|
* underscore, skip the variable,
|
|
|
|
* since that indidates a trusted
|
|
|
|
* field */
|
|
|
|
iovec[n].iov_base = (char*) p;
|
|
|
|
iovec[n].iov_len = e - p;
|
|
|
|
n++;
|
|
|
|
}
|
2011-12-17 00:56:34 +01:00
|
|
|
|
|
|
|
remaining -= (e - p) + 1;
|
|
|
|
p = e + 1;
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
uint64_t l;
|
|
|
|
char *k;
|
|
|
|
|
|
|
|
if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
|
|
|
|
log_debug("Failed to parse message, ignoring.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(&l, e + 1, sizeof(uint64_t));
|
|
|
|
l = le64toh(l);
|
|
|
|
|
|
|
|
if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
|
|
|
|
e[1+sizeof(uint64_t)+l] != '\n') {
|
|
|
|
log_debug("Failed to parse message, ignoring.");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
k = malloc((e - p) + 1 + l);
|
|
|
|
if (!k) {
|
|
|
|
log_error("Out of memory");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(k, p, e - p);
|
|
|
|
k[e - p] = '=';
|
|
|
|
memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
|
|
|
|
|
2011-12-17 01:36:47 +01:00
|
|
|
if (k[0] != '_') {
|
|
|
|
iovec[n].iov_base = k;
|
|
|
|
iovec[n].iov_len = (e - p) + 1 + l;
|
|
|
|
n++;
|
|
|
|
} else
|
|
|
|
free(k);
|
2011-12-17 00:56:34 +01:00
|
|
|
|
|
|
|
remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
|
|
|
|
p = e + 1 + sizeof(uint64_t) + l + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dispatch_message(s, iovec, n, m, ucred, tv);
|
|
|
|
|
|
|
|
for (j = 0; j < n; j++)
|
|
|
|
if (iovec[j].iov_base < buffer ||
|
|
|
|
(const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
|
|
|
|
free(iovec[j].iov_base);
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static int process_event(Server *s, struct epoll_event *ev) {
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
if (ev->events != EPOLLIN) {
|
|
|
|
log_info("Got invalid event from epoll.");
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ev->data.fd == s->signal_fd) {
|
|
|
|
struct signalfd_siginfo sfsi;
|
|
|
|
ssize_t n;
|
|
|
|
|
|
|
|
n = read(s->signal_fd, &sfsi, sizeof(sfsi));
|
|
|
|
if (n != sizeof(sfsi)) {
|
|
|
|
|
|
|
|
if (n >= 0)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
if (errno == EINTR || errno == EAGAIN)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
|
|
|
|
return 0;
|
|
|
|
|
2011-10-08 02:20:44 +02:00
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
if (ev->data.fd == s->native_fd ||
|
|
|
|
ev->data.fd == s->syslog_fd) {
|
2011-10-07 21:06:39 +02:00
|
|
|
for (;;) {
|
|
|
|
struct msghdr msghdr;
|
|
|
|
struct iovec iovec;
|
|
|
|
struct ucred *ucred = NULL;
|
|
|
|
struct timeval *tv = NULL;
|
|
|
|
struct cmsghdr *cmsg;
|
|
|
|
union {
|
|
|
|
struct cmsghdr cmsghdr;
|
|
|
|
uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
|
|
|
|
CMSG_SPACE(sizeof(struct timeval))];
|
|
|
|
} control;
|
|
|
|
ssize_t n;
|
2011-12-17 00:56:34 +01:00
|
|
|
int v;
|
|
|
|
|
|
|
|
if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) {
|
|
|
|
log_error("SIOCINQ failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (v <= 0)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
2011-10-07 21:06:39 +02:00
|
|
|
|
|
|
|
zero(iovec);
|
2011-12-17 00:56:34 +01:00
|
|
|
iovec.iov_base = s->buffer;
|
|
|
|
iovec.iov_len = s->buffer_size;
|
2011-10-07 21:06:39 +02:00
|
|
|
|
|
|
|
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);
|
|
|
|
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 == SO_TIMESTAMP &&
|
|
|
|
cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval)))
|
|
|
|
tv = (struct timeval*) CMSG_DATA(cmsg);
|
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
if (ev->data.fd == s->syslog_fd) {
|
|
|
|
char *e;
|
|
|
|
|
|
|
|
e = memchr(s->buffer, '\n', n);
|
|
|
|
if (e)
|
|
|
|
*e = 0;
|
|
|
|
else
|
|
|
|
s->buffer[n] = 0;
|
2011-10-07 21:06:39 +02:00
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
process_syslog_message(s, strstrip(s->buffer), ucred, tv);
|
|
|
|
} else
|
|
|
|
process_native_message(s, s->buffer, n, ucred, tv);
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
2011-10-08 02:20:44 +02:00
|
|
|
|
|
|
|
return 1;
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
2011-10-08 02:20:44 +02:00
|
|
|
log_error("Unknown event.");
|
|
|
|
return 0;
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
2011-10-12 05:06:09 +02:00
|
|
|
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;
|
|
|
|
|
|
|
|
/* First try to create the machine path, but not the prefix */
|
2011-10-12 05:29:08 +02:00
|
|
|
fn = strappend("/var/log/journal/", sd_id128_to_string(machine, ids));
|
2011-10-12 05:06:09 +02:00
|
|
|
if (!fn)
|
|
|
|
return -ENOMEM;
|
|
|
|
(void) mkdir(fn, 0755);
|
|
|
|
free(fn);
|
|
|
|
|
|
|
|
/* The create the system journal file */
|
|
|
|
fn = join("/var/log/journal/", ids, "/system.journal", NULL);
|
|
|
|
if (!fn)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
2011-10-13 05:19:35 +02:00
|
|
|
r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
|
2011-10-12 05:06:09 +02:00
|
|
|
free(fn);
|
|
|
|
|
2011-10-12 05:29:08 +02:00
|
|
|
if (r >= 0) {
|
2011-12-21 02:40:59 +01:00
|
|
|
s->system_journal->metrics = s->metrics;
|
|
|
|
s->system_journal->compress = s->compress;
|
|
|
|
|
2011-10-12 05:06:09 +02:00
|
|
|
fix_perms(s->system_journal, 0);
|
2011-10-12 05:29:08 +02:00
|
|
|
return r;
|
2011-10-12 05:06:09 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (r < 0 && r != -ENOENT) {
|
2011-10-12 05:29:08 +02:00
|
|
|
log_error("Failed to open system journal: %s", strerror(-r));
|
2011-10-12 05:06:09 +02:00
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
2011-10-12 05:29:08 +02:00
|
|
|
/* /var didn't work, so try /run, but this time we
|
|
|
|
* create the prefix too */
|
|
|
|
fn = join("/run/log/journal/", ids, "/system.journal", NULL);
|
|
|
|
if (!fn)
|
|
|
|
return -ENOMEM;
|
2011-10-14 04:44:50 +02:00
|
|
|
|
|
|
|
(void) mkdir_parents(fn, 0755);
|
2011-10-13 05:19:35 +02:00
|
|
|
r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
|
2011-10-12 05:29:08 +02:00
|
|
|
free(fn);
|
|
|
|
|
|
|
|
if (r < 0) {
|
|
|
|
log_error("Failed to open runtime journal: %s", strerror(-r));
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
2011-12-21 02:40:59 +01:00
|
|
|
s->runtime_journal->metrics = s->metrics;
|
|
|
|
s->runtime_journal->compress = s->compress;
|
|
|
|
|
2011-10-12 05:29:08 +02:00
|
|
|
fix_perms(s->runtime_journal, 0);
|
|
|
|
return r;
|
2011-10-12 05:06:09 +02:00
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
static int open_syslog_socket(Server *s) {
|
|
|
|
union sockaddr_union sa;
|
|
|
|
int one, r;
|
2011-10-07 21:06:39 +02:00
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
if (s->syslog_fd < 0) {
|
2011-10-07 21:06:39 +02:00
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
|
|
|
|
if (s->syslog_fd < 0) {
|
|
|
|
log_error("socket() failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
zero(sa);
|
|
|
|
sa.un.sun_family = AF_UNIX;
|
|
|
|
strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
|
|
|
|
|
|
|
|
unlink(sa.un.sun_path);
|
|
|
|
|
|
|
|
r = bind(s->syslog_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
|
|
|
|
if (r < 0) {
|
|
|
|
log_error("bind() failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
chmod(sa.un.sun_path, 0666);
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
one = 1;
|
|
|
|
r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
|
|
|
|
if (r < 0) {
|
|
|
|
log_error("SO_PASSCRED failed: %m");
|
|
|
|
return -errno;
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
one = 1;
|
|
|
|
r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
|
|
|
|
if (r < 0) {
|
|
|
|
log_error("SO_TIMESTAMP failed: %m");
|
|
|
|
return -errno;
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
return 0;
|
|
|
|
}
|
2011-10-07 21:06:39 +02:00
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
static int open_native_socket(Server*s) {
|
|
|
|
union sockaddr_union sa;
|
|
|
|
int one, r;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
if (s->native_fd < 0) {
|
|
|
|
|
|
|
|
s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
|
|
|
|
if (s->native_fd < 0) {
|
2011-10-07 21:06:39 +02:00
|
|
|
log_error("socket() failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
zero(sa);
|
|
|
|
sa.un.sun_family = AF_UNIX;
|
2011-12-17 00:56:34 +01:00
|
|
|
strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path));
|
2011-10-07 21:06:39 +02:00
|
|
|
|
|
|
|
unlink(sa.un.sun_path);
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
r = bind(s->native_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
|
2011-10-07 21:06:39 +02:00
|
|
|
if (r < 0) {
|
|
|
|
log_error("bind() failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
chmod(sa.un.sun_path, 0666);
|
|
|
|
}
|
|
|
|
|
|
|
|
one = 1;
|
2011-12-17 00:56:34 +01:00
|
|
|
r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
|
2011-10-07 21:06:39 +02:00
|
|
|
if (r < 0) {
|
|
|
|
log_error("SO_PASSCRED failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
one = 1;
|
2011-12-17 00:56:34 +01:00
|
|
|
r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
|
2011-10-07 21:06:39 +02:00
|
|
|
if (r < 0) {
|
|
|
|
log_error("SO_TIMESTAMP failed: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
2011-12-17 00:56:34 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int server_init(Server *s) {
|
|
|
|
int n, r, fd;
|
|
|
|
struct epoll_event ev;
|
|
|
|
sigset_t mask;
|
|
|
|
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
zero(*s);
|
|
|
|
s->syslog_fd = s->native_fd = s->signal_fd = -1;
|
2011-12-20 02:38:36 +01:00
|
|
|
s->metrics.max_size = DEFAULT_MAX_SIZE;
|
|
|
|
s->metrics.min_size = DEFAULT_MIN_SIZE;
|
|
|
|
s->metrics.keep_free = DEFAULT_KEEP_FREE;
|
|
|
|
s->max_use = DEFAULT_MAX_USE;
|
2011-12-21 02:40:59 +01:00
|
|
|
s->compress = true;
|
2011-12-17 00:56:34 +01:00
|
|
|
|
|
|
|
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, "/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_UNIX, SOCK_DGRAM, -1) > 0) {
|
|
|
|
|
|
|
|
if (s->native_fd >= 0) {
|
|
|
|
log_error("Too many native sockets passed.");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->native_fd = fd;
|
|
|
|
} else {
|
|
|
|
log_error("Unknown socket passed.");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
r = open_syslog_socket(s);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
2011-10-07 21:06:39 +02:00
|
|
|
zero(ev);
|
|
|
|
ev.events = EPOLLIN;
|
|
|
|
ev.data.fd = s->syslog_fd;
|
|
|
|
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->syslog_fd, &ev) < 0) {
|
2011-12-17 00:56:34 +01:00
|
|
|
log_error("Failed to add syslog server fd to epoll object: %m");
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
r = open_native_socket(s);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
zero(ev);
|
|
|
|
ev.events = EPOLLIN;
|
|
|
|
ev.data.fd = s->native_fd;
|
|
|
|
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->native_fd, &ev) < 0) {
|
|
|
|
log_error("Failed to add native server fd to epoll object: %m");
|
2011-10-07 21:06:39 +02:00
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
|
|
|
|
if (!s->user_journals) {
|
|
|
|
log_error("Out of memory.");
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2011-10-12 05:06:09 +02:00
|
|
|
r = system_journal_open(s);
|
|
|
|
if (r < 0)
|
2011-10-07 21:06:39 +02:00
|
|
|
return r;
|
|
|
|
|
|
|
|
assert_se(sigemptyset(&mask) == 0);
|
|
|
|
sigset_add_many(&mask, SIGINT, SIGTERM, -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 void server_done(Server *s) {
|
|
|
|
JournalFile *f;
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
if (s->system_journal)
|
|
|
|
journal_file_close(s->system_journal);
|
|
|
|
|
2011-10-07 23:03:07 +02:00
|
|
|
if (s->runtime_journal)
|
|
|
|
journal_file_close(s->runtime_journal);
|
|
|
|
|
2011-10-07 21:06:39 +02:00
|
|
|
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);
|
2011-12-17 00:56:34 +01:00
|
|
|
|
|
|
|
if (s->native_fd >= 0)
|
|
|
|
close_nointr_nofail(s->native_fd);
|
2011-10-07 21:06:39 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
|
|
Server server;
|
|
|
|
int r;
|
|
|
|
|
|
|
|
/* if (getppid() != 1) { */
|
|
|
|
/* log_error("This program should be invoked by init only."); */
|
|
|
|
/* return EXIT_FAILURE; */
|
|
|
|
/* } */
|
|
|
|
|
|
|
|
if (argc > 1) {
|
|
|
|
log_error("This program does not take arguments.");
|
|
|
|
return EXIT_FAILURE;
|
|
|
|
}
|
|
|
|
|
2011-10-07 23:03:07 +02:00
|
|
|
log_set_target(LOG_TARGET_CONSOLE);
|
2011-12-21 02:40:59 +01:00
|
|
|
log_set_max_level(LOG_DEBUG);
|
2011-10-07 21:06:39 +02:00
|
|
|
log_parse_environment();
|
|
|
|
log_open();
|
|
|
|
|
|
|
|
umask(0022);
|
|
|
|
|
|
|
|
r = server_init(&server);
|
|
|
|
if (r < 0)
|
|
|
|
goto finish;
|
|
|
|
|
|
|
|
log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
|
|
|
|
|
|
|
|
sd_notify(false,
|
|
|
|
"READY=1\n"
|
|
|
|
"STATUS=Processing messages...");
|
2011-12-19 22:35:46 +01:00
|
|
|
|
2011-10-07 21:06:39 +02:00
|
|
|
for (;;) {
|
|
|
|
struct epoll_event event;
|
|
|
|
|
|
|
|
r = epoll_wait(server.epoll_fd, &event, 1, -1);
|
|
|
|
if (r < 0) {
|
|
|
|
|
|
|
|
if (errno == EINTR)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
log_error("epoll_wait() failed: %m");
|
|
|
|
r = -errno;
|
|
|
|
goto finish;
|
|
|
|
} else if (r == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
r = process_event(&server, &event);
|
|
|
|
if (r < 0)
|
|
|
|
goto finish;
|
|
|
|
else if (r == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
finish:
|
|
|
|
sd_notify(false,
|
|
|
|
"STATUS=Shutting down...");
|
|
|
|
|
|
|
|
server_done(&server);
|
|
|
|
|
|
|
|
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
|
|
}
|