Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/epoll.h>
#include <sys/socket.h>
#include <errno.h>
-#include <sys/signalfd.h>
#include <unistd.h>
-#include <fcntl.h>
-#include <sys/acl.h>
-#include <acl/libacl.h>
-#include <stddef.h>
-#include <sys/ioctl.h>
-#include <linux/sockios.h>
-#include <sys/statvfs.h>
-#include "hashmap.h"
-#include "journal-file.h"
-#include "sd-daemon.h"
-#include "socket-util.h"
-#include "acl-util.h"
-#include "cgroup-util.h"
-#include "list.h"
-#include "journal-rate-limit.h"
-#include "sd-journal.h"
-#include "sd-login.h"
-#include "journal-internal.h"
+#include "systemd/sd-journal.h"
+#include "systemd/sd-messages.h"
+#include "systemd/sd-daemon.h"
-#define USER_JOURNALS_MAX 1024
-#define STDOUT_STREAMS_MAX 4096
-
-#define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC)
-#define DEFAULT_RATE_LIMIT_BURST 200
-
-#define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC)
-
-#define RECHECK_VAR_AVAILABLE_USEC (30*USEC_PER_SEC)
-
-#define SYSLOG_TIMEOUT_USEC (5*USEC_PER_SEC)
-
-typedef struct StdoutStream StdoutStream;
-
-typedef struct Server {
- int epoll_fd;
- int signal_fd;
- int syslog_fd;
- int native_fd;
- int stdout_fd;
-
- JournalFile *runtime_journal;
- JournalFile *system_journal;
- Hashmap *user_journals;
-
- uint64_t seqnum;
-
- char *buffer;
- size_t buffer_size;
-
- JournalRateLimit *rate_limit;
-
- JournalMetrics runtime_metrics;
- JournalMetrics system_metrics;
-
- bool compress;
-
- uint64_t cached_available_space;
- usec_t cached_available_space_timestamp;
-
- uint64_t var_available_timestamp;
-
- LIST_HEAD(StdoutStream, stdout_streams);
- unsigned n_stdout_streams;
-} Server;
-
-typedef enum StdoutStreamState {
- STDOUT_STREAM_TAG,
- STDOUT_STREAM_PRIORITY,
- STDOUT_STREAM_PRIORITY_PREFIX,
- STDOUT_STREAM_TEE_CONSOLE,
- STDOUT_STREAM_RUNNING
-} StdoutStreamState;
-
-struct StdoutStream {
- Server *server;
- StdoutStreamState state;
-
- int fd;
-
- struct ucred ucred;
-
- char *tag;
- int priority;
- bool priority_prefix:1;
- bool tee_console:1;
-
- char buffer[LINE_MAX+1];
- size_t length;
-
- LIST_FIELDS(StdoutStream, stdout_stream);
-};
-
-static int server_flush_to_var(Server *s);
-
-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 buf, *de;
- int k;
-
- k = readdir_r(d, &buf, &de);
- if (k != 0) {
- r = -k;
- goto finish;
- }
-
- if (!de)
- break;
-
- if (!dirent_is_file_with_suffix(de, ".journal"))
- continue;
-
- if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
- continue;
-
- sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
- }
-
- 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 fix_perms(JournalFile *f, uid_t uid) {
- acl_t acl;
- acl_entry_t entry;
- acl_permset_t permset;
- int r;
-
- assert(f);
-
- r = fchmod_and_fchown(f->fd, 0640, 0, 0);
- if (r < 0)
- log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r));
-
- 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);
-}
-
-static JournalFile* find_journal(Server *s, uid_t uid) {
- char *p;
- int r;
- JournalFile *f;
- char ids[33];
- 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/%s/user-%lu.journal", sd_id128_to_string(machine, ids), (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(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
- free(p);
-
- if (r < 0)
- return s->system_journal;
-
- fix_perms(f, uid);
- f->metrics = s->system_metrics;
- f->compress = s->compress;
-
- 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_info("Rotating...");
-
- if (s->runtime_journal) {
- r = journal_file_rotate(&s->runtime_journal);
- if (r < 0)
- log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r));
- }
-
- if (s->system_journal) {
- r = journal_file_rotate(&s->system_journal);
- if (r < 0)
- log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
- }
-
- HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) {
- r = journal_file_rotate(&f);
- if (r < 0)
- log_error("Failed to rotate %s: %s", f->path, strerror(-r));
- else
- hashmap_replace(s->user_journals, k, f);
- }
-}
-
-static void server_vacuum(Server *s) {
- char *p;
- char ids[33];
- sd_id128_t machine;
- int r;
-
- log_info("Vacuuming...");
-
- 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) {
- if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
- log_error("Out of memory.");
- return;
- }
-
- r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free);
- if (r < 0 && r != -ENOENT)
- log_error("Failed to vacuum %s: %s", p, strerror(-r));
- free(p);
- }
-
-
- if (s->runtime_journal) {
- if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
- log_error("Out of memory.");
- return;
- }
-
- r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free);
- 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 void dispatch_message_real(Server *s,
- struct iovec *iovec, unsigned n, unsigned m,
- struct ucred *ucred,
- struct timeval *tv) {
-
- 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, *service = NULL;
-
- char idbuf[33];
- sd_id128_t id;
- int r;
- char *t;
- uid_t loginuid = 0, realuid = 0;
- JournalFile *f;
- bool vacuumed = false;
-
- assert(s);
- assert(iovec);
- assert(n > 0);
- assert(n + 16 <= m);
-
- if (ucred) {
- uint32_t audit;
- uid_t owner;
-
- 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 (comm)
- 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);
- }
-
- 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_service(ucred->pid, &t) >= 0) {
- service = strappend("_SYSTEMD_SERVICE=", t);
- free(t);
-
- if (service)
- IOVEC_SET_STRING(iovec[n++], service);
- }
-
- 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);
- }
-
- 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);
-
- server_flush_to_var(s);
-
-retry:
- f = find_journal(s, realuid == 0 ? 0 : loginuid);
- if (!f)
- log_warning("Dropping message, as we can't find a place to store the data.");
- else {
- r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
-
- if (r == -E2BIG && !vacuumed) {
- log_info("Allocation limit reached.");
-
- server_rotate(s);
- server_vacuum(s);
- vacuumed = true;
-
- log_info("Retrying write.");
- goto retry;
- }
-
- if (r < 0)
- log_error("Failed to write entry, ignoring: %s", strerror(-r));
- }
-
- 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(service);
-}
-
-static void dispatch_message(Server *s,
- struct iovec *iovec, unsigned n, unsigned m,
- struct ucred *ucred,
- struct timeval *tv,
- int priority) {
- int rl;
- char *path = NULL, *c;
-
- assert(s);
- assert(iovec || n == 0);
-
- if (n == 0)
- return;
-
- if (!ucred)
- goto finish;
-
- path = shortened_cgroup_path(ucred->pid);
- if (!path)
- goto finish;
-
- /* example: /user/lennart/3/foobar
- * /system/dbus.service/foobar
- *
- * So let's cut of everything past the third /, since that is
- * wher user directories start */
-
- c = strchr(path, '/');
- if (c) {
- c = strchr(c+1, '/');
- if (c) {
- c = strchr(c+1, '/');
- if (c)
- *c = 0;
- }
- }
-
- rl = journal_rate_limit_test(s->rate_limit, path, priority, available_space(s));
-
- if (rl == 0) {
- free(path);
- return;
- }
-
- if (rl > 1) {
- int j = 0;
- char suppress_message[LINE_MAX];
- struct iovec suppress_iovec[18];
-
- /* Write a suppression message if we suppressed something */
-
- snprintf(suppress_message, sizeof(suppress_message), "MESSAGE=Suppressed %u messages from %s", rl - 1, path);
- char_array_0(suppress_message);
-
- IOVEC_SET_STRING(suppress_iovec[j++], "PRIORITY=5");
- IOVEC_SET_STRING(suppress_iovec[j++], suppress_message);
-
- dispatch_message_real(s, suppress_iovec, j, ELEMENTSOF(suppress_iovec), NULL, NULL);
- }
-
- free(path);
-
-finish:
- dispatch_message_real(s, iovec, n, m, ucred, tv);
-}
-
-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[19];
- 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, priority & LOG_PRIMASK);
-
- free(message);
- free(syslog_facility);
- free(syslog_priority);
-}
-
-static bool valid_user_field(const char *p, size_t l) {
- const char *a;
-
- /* We kinda enforce POSIX syntax recommendations for
- environment variables here, but make a couple of additional
- requirements.
-
- http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
-
- /* No empty field names */
- if (l <= 0)
- return false;
-
- /* Don't allow names longer than 64 chars */
- if (l > 64)
- return false;
-
- /* Variables starting with an underscore are protected */
- if (p[0] == '_')
- return false;
-
- /* Don't allow digits as first character */
- if (p[0] >= '0' && p[0] <= '9')
- return false;
-
- /* Only allow A-Z0-9 and '_' */
- for (a = p; a < p + l; a++)
- if (!((*a >= 'A' && *a <= 'Z') ||
- (*a >= '0' && *a <= '9') ||
- *a == '_'))
- return false;
-
- return true;
-}
-
-static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
- struct iovec *iovec = NULL;
- unsigned n = 0, m = 0, j;
- const char *p;
- size_t remaining;
- int priority = LOG_INFO;
-
- assert(s);
- assert(buffer || n == 0);
-
- p = buffer;
- remaining = buffer_size;
-
- while (remaining > 0) {
- const char *e, *q;
-
- e = memchr(p, '\n', remaining);
-
- if (!e) {
- /* Trailing noise, let's ignore it, and flush what we collected */
- log_debug("Received message with trailing noise, ignoring.");
- break;
- }
-
- if (e == p) {
- /* Entry separator */
- dispatch_message(s, iovec, n, m, ucred, tv, priority);
- n = 0;
- priority = LOG_INFO;
-
- p++;
- remaining--;
- continue;
- }
-
- if (*p == '.' || *p == '#') {
- /* Ignore control commands for now, and
- * comments too. */
- remaining -= (e - p) + 1;
- p = e + 1;
- continue;
- }
-
- /* A property follows */
-
- if (n+16 >= m) {
- struct iovec *c;
- unsigned u;
-
- u = MAX((n+16U) * 2U, 4U);
- c = realloc(iovec, u * sizeof(struct iovec));
- if (!c) {
- log_error("Out of memory");
- break;
- }
-
- iovec = c;
- m = u;
- }
-
- q = memchr(p, '=', e - p);
- if (q) {
- if (valid_user_field(p, q - p)) {
- /* 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++;
-
- /* We need to determine the priority
- * of this entry for the rate limiting
- * logic */
- if (e - p == 10 &&
- memcmp(p, "PRIORITY=", 10) == 0 &&
- p[10] >= '0' &&
- p[10] <= '9')
- priority = p[10] - '0';
- }
-
- remaining -= (e - p) + 1;
- p = e + 1;
- continue;
- } else {
- uint64_t l;
- char *k;
-
- if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
- log_debug("Failed to parse message, ignoring.");
- break;
- }
-
- memcpy(&l, e + 1, sizeof(uint64_t));
- l = le64toh(l);
-
- if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
- e[1+sizeof(uint64_t)+l] != '\n') {
- log_debug("Failed to parse message, ignoring.");
- break;
- }
-
- k = malloc((e - p) + 1 + l);
- if (!k) {
- log_error("Out of memory");
- break;
- }
-
- memcpy(k, p, e - p);
- k[e - p] = '=';
- memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
-
- if (valid_user_field(p, e - p)) {
- iovec[n].iov_base = k;
- iovec[n].iov_len = (e - p) + 1 + l;
- n++;
- } else
- free(k);
-
- remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
- p = e + 1 + sizeof(uint64_t) + l + 1;
- }
- }
-
- dispatch_message(s, iovec, n, m, ucred, tv, priority);
-
- 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);
-}
-
-static int stdout_stream_log(StdoutStream *s, const char *p, size_t l) {
- struct iovec iovec[18];
- char *message = NULL, *syslog_priority = NULL;
- unsigned n = 0;
- size_t tag_len;
- int priority;
-
- assert(s);
- assert(p);
-
- priority = s->priority;
-
- if (s->priority_prefix &&
- l > 3 &&
- p[0] == '<' &&
- p[1] >= '0' && p[1] <= '7' &&
- p[2] == '>') {
-
- priority = p[1] - '0';
- p += 3;
- l -= 3;
- }
-
- if (l <= 0)
- return 0;
-
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
-
- tag_len = s->tag ? strlen(s->tag) + 2: 0;
- message = malloc(8 + tag_len + l);
- if (message) {
- memcpy(message, "MESSAGE=", 8);
-
- if (s->tag) {
- memcpy(message+8, s->tag, tag_len-2);
- memcpy(message+8+tag_len-2, ": ", 2);
- }
-
- memcpy(message+8+tag_len, p, l);
- iovec[n].iov_base = message;
- iovec[n].iov_len = 8+tag_len+l;
- n++;
- }
-
- dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority);
-
- if (s->tee_console) {
- int console;
-
- console = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
- if (console >= 0) {
- n = 0;
- if (s->tag) {
- IOVEC_SET_STRING(iovec[n++], s->tag);
- IOVEC_SET_STRING(iovec[n++], ": ");
- }
-
- iovec[n].iov_base = (void*) p;
- iovec[n].iov_len = l;
- n++;
-
- IOVEC_SET_STRING(iovec[n++], (char*) "\n");
-
- writev(console, iovec, n);
- }
- }
-
- free(message);
- free(syslog_priority);
-
- return 0;
-}
-
-static int stdout_stream_line(StdoutStream *s, const char *p, size_t l) {
- assert(s);
- assert(p);
-
- while (l > 0 && strchr(WHITESPACE, *p)) {
- l--;
- p++;
- }
-
- while (l > 0 && strchr(WHITESPACE, *(p+l-1)))
- l--;
-
- switch (s->state) {
-
- case STDOUT_STREAM_TAG:
-
- if (l > 0) {
- s->tag = strndup(p, l);
- if (!s->tag) {
- log_error("Out of memory");
- return -EINVAL;
- }
- }
-
- s->state = STDOUT_STREAM_PRIORITY;
- return 0;
-
- case STDOUT_STREAM_PRIORITY:
- if (l != 1 || *p < '0' || *p > '7') {
- log_warning("Failed to parse log priority line.");
- return -EINVAL;
- }
-
- s->priority = *p - '0';
- s->state = STDOUT_STREAM_PRIORITY_PREFIX;
- return 0;
-
- case STDOUT_STREAM_PRIORITY_PREFIX:
- if (l != 1 || *p < '0' || *p > '1') {
- log_warning("Failed to parse priority prefix line.");
- return -EINVAL;
- }
-
- s->priority_prefix = *p - '0';
- s->state = STDOUT_STREAM_TEE_CONSOLE;
- return 0;
-
- case STDOUT_STREAM_TEE_CONSOLE:
- if (l != 1 || *p < '0' || *p > '1') {
- log_warning("Failed to parse tee to console line.");
- return -EINVAL;
- }
-
- s->tee_console = *p - '0';
- s->state = STDOUT_STREAM_RUNNING;
- return 0;
-
- case STDOUT_STREAM_RUNNING:
- return stdout_stream_log(s, p, l);
- }
-
- assert_not_reached("Unknown stream state");
-}
-
-static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
- char *p;
- size_t remaining;
- int r;
-
- assert(s);
-
- p = s->buffer;
- remaining = s->length;
- for (;;) {
- char *end;
- size_t skip;
-
- end = memchr(p, '\n', remaining);
- if (!end) {
- if (remaining >= LINE_MAX) {
- end = p + LINE_MAX;
- skip = LINE_MAX;
- } else
- break;
- } else
- skip = end - p + 1;
-
- r = stdout_stream_line(s, p, end - p);
- if (r < 0)
- return r;
-
- remaining -= skip;
- p += skip;
- }
-
- if (force_flush && remaining > 0) {
- r = stdout_stream_line(s, p, remaining);
- if (r < 0)
- return r;
-
- p += remaining;
- remaining = 0;
- }
-
- if (p > s->buffer) {
- memmove(s->buffer, p, remaining);
- s->length = remaining;
- }
-
- return 0;
-}
-
-static int stdout_stream_process(StdoutStream *s) {
- ssize_t l;
- int r;
-
- assert(s);
-
- l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
- if (l < 0) {
-
- if (errno == EAGAIN)
- return 0;
-
- log_warning("Failed to read from stream: %m");
- return -errno;
- }
-
- if (l == 0) {
- r = stdout_stream_scan(s, true);
- if (r < 0)
- return r;
-
- return 0;
- }
-
- s->length += l;
- r = stdout_stream_scan(s, false);
- if (r < 0)
- return r;
-
- return 1;
-
-}
-
-static void stdout_stream_free(StdoutStream *s) {
- assert(s);
-
- if (s->server) {
- assert(s->server->n_stdout_streams > 0);
- s->server->n_stdout_streams --;
- LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
- }
-
- if (s->fd >= 0) {
- if (s->server)
- epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
-
- close_nointr_nofail(s->fd);
- }
-
- free(s->tag);
- free(s);
-}
-
-static int stdout_stream_new(Server *s) {
- StdoutStream *stream;
- int fd, r;
- socklen_t len;
- struct epoll_event ev;
-
- assert(s);
-
- fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
- if (fd < 0) {
- if (errno == EAGAIN)
- return 0;
-
- log_error("Failed to accept stdout connection: %m");
- return -errno;
- }
-
- if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
- log_warning("Too many stdout streams, refusing connection.");
- close_nointr_nofail(fd);
- return 0;
- }
-
- stream = new0(StdoutStream, 1);
- if (!stream) {
- log_error("Out of memory.");
- close_nointr_nofail(fd);
- return -ENOMEM;
- }
-
- stream->fd = fd;
-
- len = sizeof(stream->ucred);
- if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
- log_error("Failed to determine peer credentials: %m");
- r = -errno;
- goto fail;
- }
-
- if (shutdown(fd, SHUT_WR) < 0) {
- log_error("Failed to shutdown writing side of socket: %m");
- r = -errno;
- goto fail;
- }
-
- zero(ev);
- ev.data.ptr = stream;
- ev.events = EPOLLIN;
- if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
- log_error("Failed to add stream to event loop: %m");
- r = -errno;
- goto fail;
- }
-
- stream->server = s;
- LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
- s->n_stdout_streams ++;
-
- return 0;
-
-fail:
- stdout_stream_free(stream);
- return r;
-}
-
-static int system_journal_open(Server *s) {
- int r;
- char *fn;
- sd_id128_t machine;
- char ids[33];
-
- r = sd_id128_get_machine(&machine);
- if (r < 0)
- return r;
-
- sd_id128_to_string(machine, ids);
-
- if (!s->system_journal) {
-
- /* First try to create the machine path, but not the prefix */
- fn = strappend("/var/log/journal/", ids);
- if (!fn)
- return -ENOMEM;
- (void) mkdir(fn, 0755);
- free(fn);
-
- /* The create the system journal file */
- fn = join("/var/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->system_journal);
- free(fn);
-
- if (r >= 0) {
- journal_default_metrics(&s->system_metrics, s->system_journal->fd);
-
- s->system_journal->metrics = s->system_metrics;
- s->system_journal->compress = s->compress;
-
- fix_perms(s->system_journal, 0);
- } else if (r < 0) {
-
- if (r != -ENOENT && r != -EROFS)
- log_warning("Failed to open system journal: %s", strerror(-r));
-
- r = 0;
- }
- }
-
- if (!s->runtime_journal) {
-
- fn = join("/run/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- if (s->system_journal) {
-
- /* Try to open the runtime journal, but only
- * if it already exists, so that we can flush
- * it into the system journal */
-
- r = journal_file_open(fn, O_RDWR, 0640, NULL, &s->runtime_journal);
- free(fn);
-
- if (r < 0) {
- if (r != -ENOENT)
- log_warning("Failed to open runtime journal: %s", strerror(-r));
-
- r = 0;
- }
-
- } else {
-
- /* OK, we really need the runtime journal, so create
- * it if necessary. */
-
- (void) mkdir_parents(fn, 0755);
- r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
- free(fn);
-
- if (r < 0) {
- log_error("Failed to open runtime journal: %s", strerror(-r));
- return r;
- }
- }
-
- if (s->runtime_journal) {
- journal_default_metrics(&s->runtime_metrics, s->runtime_journal->fd);
-
- s->runtime_journal->metrics = s->runtime_metrics;
- s->runtime_journal->compress = s->compress;
-
- fix_perms(s->runtime_journal, 0);
- }
- }
-
- return r;
-}
-
-static int server_flush_to_var(Server *s) {
- char path[] = "/run/log/journal/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
- Object *o = NULL;
- int r;
- sd_id128_t machine;
- sd_journal *j;
- usec_t ts;
-
- assert(s);
-
- if (!s->runtime_journal)
- return 0;
-
- ts = now(CLOCK_MONOTONIC);
- if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
- return 0;
-
- s->var_available_timestamp = ts;
-
- system_journal_open(s);
-
- if (!s->system_journal)
- return 0;
-
- r = sd_id128_get_machine(&machine);
- if (r < 0) {
- log_error("Failed to get machine id: %s", strerror(-r));
- return r;
- }
-
- r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
- if (r < 0) {
- log_error("Failed to read runtime journal: %s", strerror(-r));
- return r;
- }
-
- SD_JOURNAL_FOREACH(j) {
- JournalFile *f;
-
- f = j->current_file;
- assert(f && f->current_offset > 0);
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0) {
- log_error("Can't read entry: %s", strerror(-r));
- goto finish;
- }
-
- r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
- if (r == -E2BIG) {
- log_info("Allocation limit reached.");
-
- journal_file_post_change(s->system_journal);
- server_rotate(s);
- server_vacuum(s);
-
- r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
- }
-
- if (r < 0) {
- log_error("Can't write entry: %s", strerror(-r));
- goto finish;
- }
- }
-
-finish:
- journal_file_post_change(s->system_journal);
-
- journal_file_close(s->runtime_journal);
- s->runtime_journal = NULL;
-
- if (r >= 0) {
- sd_id128_to_string(machine, path + 17);
- rm_rf(path, false, true, false);
- }
-
- return r;
-}
-
-static void forward_syslog(Server *s, const void *buffer, size_t length, struct ucred *ucred, struct timeval *tv) {
- struct msghdr msghdr;
- struct iovec iovec;
- struct cmsghdr *cmsg;
- union {
- struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
- CMSG_SPACE(sizeof(struct timeval))];
- } control;
- union sockaddr_union sa;
-
- assert(s);
-
- zero(msghdr);
-
- zero(iovec);
- iovec.iov_base = (void*) buffer;
- iovec.iov_len = length;
- msghdr.msg_iov = &iovec;
- msghdr.msg_iovlen = 1;
-
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/syslog", sizeof(sa.un.sun_path));
- msghdr.msg_name = &sa;
- msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
-
- zero(control);
- msghdr.msg_control = &control;
- msghdr.msg_controllen = sizeof(control);
-
- cmsg = CMSG_FIRSTHDR(&msghdr);
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_type = SCM_CREDENTIALS;
- cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
- memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
- msghdr.msg_controllen = cmsg->cmsg_len;
-
- /* Forward the syslog message we received via /dev/log to
- * /run/systemd/syslog. Unfortunately we currently can't set
- * the SO_TIMESTAMP auxiliary data, and hence we don't. */
-
- if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
- return;
-
- if (errno == ESRCH) {
- struct ucred u;
-
- /* Hmm, presumably the sender process vanished
- * by now, so let's fix it as good as we
- * can, and retry */
-
- u = *ucred;
- u.pid = getpid();
- memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
-
- if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
- return;
- }
-
- log_debug("Failed to forward syslog message: %m");
-}
-
-static int process_event(Server *s, struct epoll_event *ev) {
- assert(s);
-
- if (ev->data.fd == s->signal_fd) {
- struct signalfd_siginfo sfsi;
- ssize_t n;
-
- if (ev->events != EPOLLIN) {
- log_info("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 0;
-
- return -errno;
- }
-
- if (sfsi.ssi_signo == SIGUSR1) {
- server_flush_to_var(s);
- return 0;
- }
-
- log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
- return 0;
-
- } else if (ev->data.fd == s->native_fd ||
- ev->data.fd == s->syslog_fd) {
-
- if (ev->events != EPOLLIN) {
- log_info("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;
- union {
- struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) +
- CMSG_SPACE(sizeof(struct timeval))];
- } control;
- ssize_t n;
- 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;
- }
-
- 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);
- 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);
- }
-
- if (ev->data.fd == s->syslog_fd) {
- char *e;
-
- e = memchr(s->buffer, '\n', n);
- if (e)
- *e = 0;
- else
- s->buffer[n] = 0;
-
- forward_syslog(s, s->buffer, n, ucred, tv);
- process_syslog_message(s, strstrip(s->buffer), ucred, tv);
- } else
- process_native_message(s, s->buffer, n, ucred, tv);
- }
-
- return 1;
-
- } else if (ev->data.fd == s->stdout_fd) {
-
- if (ev->events != EPOLLIN) {
- log_info("Got invalid event from epoll.");
- return -EIO;
- }
-
- stdout_stream_new(s);
- return 1;
-
- } else {
- StdoutStream *stream;
-
- if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
- log_info("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_syslog_socket(Server *s) {
- union sockaddr_union sa;
- int one, r;
- struct epoll_event ev;
- struct timeval tv;
-
- assert(s);
-
- if (s->syslog_fd < 0) {
-
- 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, "/dev/log", 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);
- }
-
- 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;
- }
-
- 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;
- }
-
- /* Since we use the same socket for forwarding this to some
- * other syslog implementation, make sure we don't hang
- * forever */
- timeval_store(&tv, SYSLOG_TIMEOUT_USEC);
- if (setsockopt(s->syslog_fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
- log_error("SO_SNDTIMEO failed: %m");
- return -errno;
- }
-
- 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) {
- log_error("Failed to add syslog server fd to epoll object: %m");
- return -errno;
- }
-
- return 0;
-}
-
-static int open_native_socket(Server*s) {
- union sockaddr_union sa;
- int one, r;
- struct epoll_event ev;
-
- assert(s);
-
- if (s->native_fd < 0) {
-
- s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
- if (s->native_fd < 0) {
- log_error("socket() failed: %m");
- return -errno;
- }
-
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/journal", sizeof(sa.un.sun_path));
-
- unlink(sa.un.sun_path);
-
- r = bind(s->native_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);
- }
-
- one = 1;
- r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
- if (r < 0) {
- log_error("SO_PASSCRED failed: %m");
- return -errno;
- }
-
- one = 1;
- r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
- if (r < 0) {
- log_error("SO_TIMESTAMP failed: %m");
- return -errno;
- }
-
- 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");
- return -errno;
- }
-
- return 0;
-}
-
-static int open_stdout_socket(Server *s) {
- union sockaddr_union sa;
- int r;
- struct epoll_event ev;
-
- assert(s);
-
- if (s->stdout_fd < 0) {
-
- s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
- if (s->stdout_fd < 0) {
- log_error("socket() failed: %m");
- return -errno;
- }
-
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/systemd/stdout", sizeof(sa.un.sun_path));
-
- unlink(sa.un.sun_path);
-
- r = bind(s->stdout_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);
-
- if (listen(s->stdout_fd, SOMAXCONN) < 0) {
- log_error("liste() failed: %m");
- return -errno;
- }
- }
-
- zero(ev);
- ev.events = EPOLLIN;
- ev.data.fd = s->stdout_fd;
- if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) {
- log_error("Failed to add stdout server fd to epoll object: %m");
- return -errno;
- }
-
- 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, -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_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 = -1;
- s->compress = true;
-
- memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics));
- memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics));
-
- s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func);
- if (!s->user_journals) {
- log_error("Out of memory.");
- return -ENOMEM;
- }
-
- 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/native", 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/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 = open_syslog_socket(s);
- if (r < 0)
- return r;
-
- r = open_native_socket(s);
- if (r < 0)
- return r;
-
- r = open_stdout_socket(s);
- if (r < 0)
- return r;
-
- r = system_journal_open(s);
- if (r < 0)
- return r;
-
- r = open_signalfd(s);
- if (r < 0)
- return r;
-
- s->rate_limit = journal_rate_limit_new(DEFAULT_RATE_LIMIT_INTERVAL, DEFAULT_RATE_LIMIT_BURST);
- if (!s->rate_limit)
- return -ENOMEM;
-
- return 0;
-}
-
-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->rate_limit)
- journal_rate_limit_free(s->rate_limit);
-
- free(s->buffer);
-}
+#include "journal-authenticate.h"
+#include "journald-server.h"
+#include "journald-kmsg.h"
+#include "journald-syslog.h"
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;
}
- log_set_target(LOG_TARGET_CONSOLE);
+ log_set_target(LOG_TARGET_SAFE);
+ log_set_facility(LOG_SYSLOG);
log_parse_environment();
log_open();
if (r < 0)
goto finish;
- log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
+ server_vacuum(&server);
+ server_flush_to_var(&server);
+ server_flush_dev_kmsg(&server);
+
+ log_debug("systemd-journald running as pid "PID_FMT, getpid());
+ server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
sd_notify(false,
"READY=1\n"
"STATUS=Processing requests...");
- server_vacuum(&server);
- server_flush_to_var(&server);
-
for (;;) {
- struct epoll_event event;
+ usec_t t = USEC_INFINITY, n;
- r = epoll_wait(server.epoll_fd, &event, 1, -1);
- if (r < 0) {
+ r = sd_event_get_state(server.event);
+ if (r < 0)
+ goto finish;
+ if (r == SD_EVENT_FINISHED)
+ break;
- if (errno == EINTR)
+ n = now(CLOCK_REALTIME);
+
+ if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) {
+
+ /* The retention time is reached, so let's vacuum! */
+ if (server.oldest_file_usec + server.max_retention_usec < n) {
+ log_info("Retention time reached.");
+ server_rotate(&server);
+ server_vacuum(&server);
continue;
+ }
- log_error("epoll_wait() failed: %m");
- r = -errno;
- goto finish;
- } else if (r == 0)
- break;
+ /* Calculate when to rotate the next time */
+ t = server.oldest_file_usec + server.max_retention_usec - n;
+ }
- r = process_event(&server, &event);
- if (r < 0)
+#ifdef HAVE_GCRYPT
+ if (server.system_journal) {
+ usec_t u;
+
+ if (journal_file_next_evolve_usec(server.system_journal, &u)) {
+ if (n >= u)
+ t = 0;
+ else
+ t = MIN(t, u - n);
+ }
+ }
+#endif
+
+ r = sd_event_run(server.event, t);
+ if (r < 0) {
+ log_error_errno(r, "Failed to run event loop: %m");
goto finish;
- else if (r == 0)
- break;
+ }
+
+ server_maybe_append_tags(&server);
+ server_maybe_warn_forward_syslog_missed(&server);
}
- log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
+ log_debug("systemd-journald stopped as pid "PID_FMT, getpid());
+ server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
finish:
sd_notify(false,
+ "STOPPING=1\n"
"STATUS=Shutting down...");
server_done(&server);
~ianmdlvl / elogind.git / blobdiff