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/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 <sys/mman.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 "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 "conf-parser.h"
+#include "journald.h"
+#include "virt.h"
+#include "missing.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 STDOUT_STREAMS_MAX 4096
#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;
+#define N_IOVEC_META_FIELDS 17
+#define N_IOVEC_KERNEL_FIELDS 64
- 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;
+#define ENTRY_SIZE_MAX (1024*1024*32)
typedef enum StdoutStreamState {
- STDOUT_STREAM_TAG,
+ STDOUT_STREAM_IDENTIFIER,
+ STDOUT_STREAM_UNIT_ID,
STDOUT_STREAM_PRIORITY,
- STDOUT_STREAM_PRIORITY_PREFIX,
- STDOUT_STREAM_TEE_CONSOLE,
+ STDOUT_STREAM_LEVEL_PREFIX,
+ STDOUT_STREAM_FORWARD_TO_SYSLOG,
+ STDOUT_STREAM_FORWARD_TO_KMSG,
+ STDOUT_STREAM_FORWARD_TO_CONSOLE,
STDOUT_STREAM_RUNNING
} StdoutStreamState;
int fd;
struct ucred ucred;
+#ifdef HAVE_SELINUX
+ security_context_t security_context;
+#endif
- char *tag;
+ char *identifier;
+ char *unit_id;
int priority;
- bool priority_prefix:1;
- bool tee_console:1;
+ bool level_prefix:1;
+ bool forward_to_syslog:1;
+ bool forward_to_kmsg:1;
+ bool forward_to_console:1;
char buffer[LINE_MAX+1];
size_t length;
LIST_FIELDS(StdoutStream, stdout_stream);
};
-static int server_flush_to_var(Server *s);
+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 uint64_t available_space(Server *s) {
char ids[33], *p;
for (;;) {
struct stat st;
struct dirent buf, *de;
- int k;
- k = readdir_r(d, &buf, &de);
- if (k != 0) {
- r = -k;
- goto finish;
- }
+ r = readdir_r(d, &buf, &de);
+ if (r != 0)
+ break;
if (!de)
break;
- if (!dirent_is_file_with_suffix(de, ".journal"))
+ 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;
- sum += (uint64_t) st.st_blocks * (uint64_t) st.st_blksize;
+ if (!S_ISREG(st.st_mode))
+ continue;
+
+ sum += (uint64_t) st.st_blocks * 512UL;
}
avail = sum >= m->max_use ? 0 : m->max_use - sum;
return avail;
}
-static void fix_perms(JournalFile *f, uid_t uid) {
+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;
- int r;
+#endif
assert(f);
- r = fchmod_and_fchown(f->fd, 0640, 0, 0);
+ 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;
finish:
acl_free(acl);
+#endif
}
static JournalFile* find_journal(Server *s, uid_t uid) {
journal_file_close(f);
}
- r = journal_file_open(p, O_RDWR|O_CREAT, 0640, s->system_journal, &f);
+ r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, &s->system_metrics, 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;
+ server_fix_perms(s, f, uid);
r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f);
if (r < 0) {
return f;
}
-static void server_vacuum(Server *s) {
- Iterator i;
+static void server_rotate(Server *s) {
+ JournalFile *f;
void *k;
- char *p;
- char ids[33];
- sd_id128_t machine;
+ Iterator i;
int r;
- JournalFile *f;
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->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);
if (r < 0)
- log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r));
+ 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);
if (r < 0)
- log_error("Failed to rotate %s: %s", f->path, strerror(-r));
- else
+ 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, s->system_journal, PTR_TO_UINT32(k));
+ }
}
+}
+
+static void server_vacuum(Server *s) {
+ char *p;
+ char ids[33];
+ sd_id128_t machine;
+ int r;
log_info("Vacuuming...");
if (s->system_journal) {
if (asprintf(&p, "/var/log/journal/%s", ids) < 0) {
- log_error("Out of memory.");
+ log_oom();
return;
}
free(p);
}
-
if (s->runtime_journal) {
if (asprintf(&p, "/run/log/journal/%s", ids) < 0) {
- log_error("Out of memory.");
+ log_oom();
return;
}
return path;
}
-static void dispatch_message_real(Server *s,
- struct iovec *iovec, unsigned n, unsigned m,
- struct ucred *ucred,
- struct timeval *tv) {
+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)) {
+ log_info("Journal header limits reached or header out-of-date, rotating.");
+ server_rotate(s);
+ server_vacuum(s);
+ vacuumed = true;
+
+ f = find_journal(s, uid);
+ if (!f)
+ return;
+ }
+
+ for (;;) {
+ r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL);
+ if (r >= 0)
+ return;
+
+ if (vacuumed ||
+ (r != -E2BIG && /* hit limit */
+ r != -EFBIG && /* hit fs limit */
+ r != -EDQUOT && /* quota hit */
+ r != -ENOSPC && /* disk full */
+ r != -EBADMSG && /* corrupted */
+ r != -ENODATA && /* truncated */
+ r != -EHOSTDOWN && /* other machine */
+ r != -EPROTONOSUPPORT && /* unsupported feature */
+ r != -EBUSY && /* unclean shutdown */
+ r != -ESHUTDOWN /* already archived */)) {
+ log_error("Failed to write entry, ignoring: %s", strerror(-r));
+ return;
+ }
+
+ if (r == -E2BIG || r == -EFBIG || r == EDQUOT || r == ENOSPC)
+ log_info("Allocation limit reached, rotating.");
+ else if (r == -EHOSTDOWN)
+ log_info("Journal file from other machine, rotating.");
+ else if (r == -EBUSY)
+ log_info("Unlcean shutdown, rotating.");
+ else
+ log_warning("Journal file corrupted, rotating.");
+
+ server_rotate(s);
+ server_vacuum(s);
+ vacuumed = true;
+
+ f = find_journal(s, uid);
+ if (!f)
+ return;
+
+ log_info("Retrying write.");
+ }
+}
+
+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, *service = 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;
- JournalFile *f;
- bool vacuumed = false;
assert(s);
assert(iovec);
assert(n > 0);
- assert(n + 16 <= m);
+ assert(n + N_IOVEC_META_FIELDS <= m);
if (ucred) {
uint32_t audit;
+#ifdef HAVE_LOGIND
uid_t owner;
+#endif
realuid = ucred->uid;
exe = strappend("_EXE=", t);
free(t);
- if (comm)
+ if (exe)
IOVEC_SET_STRING(iovec[n++], exe);
}
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);
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);
+#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) {
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_vacuum(s);
- vacuumed = true;
-
- log_info("Retrying write.");
- goto retry;
- }
-
- if (r < 0)
- log_error("Failed to write entry, ignoring: %s", strerror(-r));
- }
+ write_to_journal(s, realuid == 0 ? 0 : loginuid, iovec, n);
free(pid);
free(uid);
free(cgroup);
free(session);
free(owner_uid);
- free(service);
+ free(unit);
+ free(selinux_context);
+}
+
+static void driver_message(Server *s, sd_id128_t message_id, const char *format, ...) {
+ char mid[11 + 32 + 1];
+ char buffer[16 + LINE_MAX + 1];
+ struct iovec iovec[N_IOVEC_META_FIELDS + 4];
+ int n = 0;
+ va_list ap;
+ struct ucred ucred;
+
+ assert(s);
+ assert(format);
+
+ IOVEC_SET_STRING(iovec[n++], "PRIORITY=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);
+
+ snprintf(mid, sizeof(mid), "MESSAGE_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(message_id));
+ char_array_0(mid);
+ IOVEC_SET_STRING(iovec[n++], mid);
+
+ zero(ucred);
+ ucred.pid = getpid();
+ ucred.uid = getuid();
+ ucred.gid = getgid();
+
+ dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL);
}
static void 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;
if (n == 0)
return;
+ if (LOG_PRI(priority) > s->max_level_store)
+ return;
+
if (!ucred)
goto finish;
}
}
- rl = journal_rate_limit_test(s->rate_limit, path, priority, available_space(s));
+ rl = journal_rate_limit_test(s->rate_limit, path, priority & LOG_PRIMASK, 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 */
+ if (rl > 1)
+ driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, "Suppressed %u messages from %s", rl - 1, path);
+
+ free(path);
+
+finish:
+ dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id);
+}
+
+static void forward_syslog_iovec(Server *s, const struct iovec *iovec, unsigned n_iovec, struct ucred *ucred, struct timeval *tv) {
+ struct msghdr msghdr;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
+ } control;
+ union sockaddr_union sa;
+
+ assert(s);
+ assert(iovec);
+ assert(n_iovec > 0);
+
+ zero(msghdr);
+ msghdr.msg_iov = (struct iovec*) iovec;
+ msghdr.msg_iovlen = n_iovec;
+
+ zero(sa);
+ sa.un.sun_family = AF_UNIX;
+ strncpy(sa.un.sun_path, "/run/systemd/journal/syslog", sizeof(sa.un.sun_path));
+ msghdr.msg_name = &sa;
+ msghdr.msg_namelen = offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path);
+
+ if (ucred) {
+ zero(control);
+ msghdr.msg_control = &control;
+ msghdr.msg_controllen = sizeof(control);
+
+ cmsg = CMSG_FIRSTHDR(&msghdr);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_CREDENTIALS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
+ memcpy(CMSG_DATA(cmsg), ucred, sizeof(struct ucred));
+ msghdr.msg_controllen = cmsg->cmsg_len;
+ }
+
+ /* Forward the syslog message we received via /dev/log to
+ * /run/systemd/syslog. Unfortunately we currently can't set
+ * the SO_TIMESTAMP auxiliary data, and hence we don't. */
- /* Write a suppression message if we suppressed something */
+ if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
+ return;
- snprintf(suppress_message, sizeof(suppress_message), "MESSAGE=Suppressed %u messages from %s", rl - 1, path);
- char_array_0(suppress_message);
+ /* The socket is full? I guess the syslog implementation is
+ * too slow, and we shouldn't wait for that... */
+ if (errno == EAGAIN)
+ return;
- IOVEC_SET_STRING(suppress_iovec[j++], "PRIORITY=5");
- IOVEC_SET_STRING(suppress_iovec[j++], suppress_message);
+ if (ucred && errno == ESRCH) {
+ struct ucred u;
- dispatch_message_real(s, suppress_iovec, j, ELEMENTSOF(suppress_iovec), NULL, NULL);
+ /* 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;
+
+ if (errno == EAGAIN)
+ return;
}
- free(path);
+ if (errno != ENOENT)
+ log_debug("Failed to forward syslog message: %m");
+}
+
+static void forward_syslog_raw(Server *s, int priority, const char *buffer, struct ucred *ucred, struct timeval *tv) {
+ struct iovec iovec;
+
+ assert(s);
+ assert(buffer);
+
+ if (LOG_PRI(priority) > s->max_level_syslog)
+ return;
+
+ IOVEC_SET_STRING(iovec, buffer);
+ forward_syslog_iovec(s, &iovec, 1, ucred, tv);
+}
+
+static void forward_syslog(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred, struct timeval *tv) {
+ struct iovec iovec[5];
+ char header_priority[6], header_time[64], header_pid[16];
+ int n = 0;
+ time_t t;
+ struct tm *tm;
+ char *ident_buf = NULL;
+
+ assert(s);
+ assert(priority >= 0);
+ assert(priority <= 999);
+ assert(message);
+
+ if (LOG_PRI(priority) > s->max_level_syslog)
+ return;
+
+ /* First: priority field */
+ snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
+ char_array_0(header_priority);
+ IOVEC_SET_STRING(iovec[n++], header_priority);
+
+ /* Second: timestamp */
+ t = tv ? tv->tv_sec : ((time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC));
+ tm = localtime(&t);
+ if (!tm)
+ return;
+ if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
+ return;
+ IOVEC_SET_STRING(iovec[n++], header_time);
+
+ /* Third: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Fourth: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+
+ forward_syslog_iovec(s, iovec, n, ucred, tv);
+
+ free(ident_buf);
+}
+
+static int fixup_priority(int priority) {
+
+ if ((priority & LOG_FACMASK) == 0)
+ return (priority & LOG_PRIMASK) | LOG_USER;
+
+ return priority;
+}
+
+static void forward_kmsg(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) {
+ struct iovec iovec[5];
+ char header_priority[6], header_pid[16];
+ int n = 0;
+ char *ident_buf = NULL;
+
+ assert(s);
+ assert(priority >= 0);
+ assert(priority <= 999);
+ assert(message);
+
+ if (_unlikely_(LOG_PRI(priority) > s->max_level_kmsg))
+ return;
+
+ if (_unlikely_(s->dev_kmsg_fd < 0))
+ return;
+
+ /* Never allow messages with kernel facility to be written to
+ * kmsg, regardless where the data comes from. */
+ priority = fixup_priority(priority);
+
+ /* First: priority field */
+ snprintf(header_priority, sizeof(header_priority), "<%i>", priority);
+ char_array_0(header_priority);
+ IOVEC_SET_STRING(iovec[n++], header_priority);
+
+ /* Second: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Fourth: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+ IOVEC_SET_STRING(iovec[n++], "\n");
+
+ if (writev(s->dev_kmsg_fd, iovec, n) < 0)
+ log_debug("Failed to write to /dev/kmsg for logging: %s", strerror(errno));
+
+ free(ident_buf);
+}
+
+static void forward_console(Server *s, int priority, const char *identifier, const char *message, struct ucred *ucred) {
+ struct iovec iovec[4];
+ char header_pid[16];
+ int n = 0, fd;
+ char *ident_buf = NULL;
+ const char *tty;
+
+ assert(s);
+ assert(message);
+
+ if (LOG_PRI(priority) > s->max_level_console)
+ return;
+
+ /* First: identifier and PID */
+ if (ucred) {
+ if (!identifier) {
+ get_process_comm(ucred->pid, &ident_buf);
+ identifier = ident_buf;
+ }
+
+ snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) ucred->pid);
+ char_array_0(header_pid);
+
+ if (identifier)
+ IOVEC_SET_STRING(iovec[n++], identifier);
+
+ IOVEC_SET_STRING(iovec[n++], header_pid);
+ } else if (identifier) {
+ IOVEC_SET_STRING(iovec[n++], identifier);
+ IOVEC_SET_STRING(iovec[n++], ": ");
+ }
+
+ /* Third: message */
+ IOVEC_SET_STRING(iovec[n++], message);
+ IOVEC_SET_STRING(iovec[n++], "\n");
+
+ tty = s->tty_path ? s->tty_path : "/dev/console";
+
+ fd = open_terminal(tty, O_WRONLY|O_NOCTTY|O_CLOEXEC);
+ if (fd < 0) {
+ log_debug("Failed to open %s for logging: %s", tty, strerror(errno));
+ goto finish;
+ }
+
+ if (writev(fd, iovec, n) < 0)
+ log_debug("Failed to write to %s for logging: %s", tty, strerror(errno));
+
+ close_nointr_nofail(fd);
finish:
- dispatch_message_real(s, iovec, n, m, ucred, tv);
+ free(ident_buf);
+}
+
+static void read_identifier(const char **buf, char **identifier, char **pid) {
+ const char *p;
+ char *t;
+ size_t l, e;
+
+ assert(buf);
+ assert(identifier);
+ assert(pid);
+
+ p = *buf;
+
+ p += strspn(p, WHITESPACE);
+ l = strcspn(p, WHITESPACE);
+
+ if (l <= 0 ||
+ p[l-1] != ':')
+ return;
+
+ e = l;
+ l--;
+
+ if (p[l-1] == ']') {
+ size_t k = l-1;
+
+ for (;;) {
+
+ if (p[k] == '[') {
+ t = strndup(p+k+1, l-k-2);
+ if (t)
+ *pid = t;
+
+ l = k;
+ break;
+ }
+
+ if (k == 0)
+ break;
+
+ k--;
+ }
+ }
+
+ t = strndup(p, l);
+ if (t)
+ *identifier = t;
+
+ *buf = p + e;
+ *buf += strspn(*buf, WHITESPACE);
}
-static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv) {
- char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL;
- struct iovec iovec[19];
+static void process_syslog_message(Server *s, const char *buf, struct ucred *ucred, struct timeval *tv, const char *label, size_t label_len) {
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *syslog_pid = NULL;
+ struct iovec iovec[N_IOVEC_META_FIELDS + 6];
unsigned n = 0;
int priority = LOG_USER | LOG_INFO;
+ char *identifier = NULL, *pid = NULL;
+ const char *orig;
assert(s);
assert(buf);
+ orig = buf;
parse_syslog_priority((char**) &buf, &priority);
+
+ if (s->forward_to_syslog)
+ forward_syslog_raw(s, priority, orig, ucred, tv);
+
skip_syslog_date((char**) &buf);
+ read_identifier(&buf, &identifier, &pid);
+
+ if (s->forward_to_kmsg)
+ forward_kmsg(s, priority, identifier, buf, ucred);
+
+ if (s->forward_to_console)
+ forward_console(s, priority, identifier, buf, ucred);
+
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=syslog");
if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
IOVEC_SET_STRING(iovec[n++], syslog_priority);
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
+ if (priority & LOG_FACMASK)
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+
+ if (identifier) {
+ syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
+ if (syslog_identifier)
+ IOVEC_SET_STRING(iovec[n++], syslog_identifier);
+ }
+
+ if (pid) {
+ syslog_pid = strappend("SYSLOG_PID=", pid);
+ if (syslog_pid)
+ IOVEC_SET_STRING(iovec[n++], syslog_pid);
+ }
message = strappend("MESSAGE=", buf);
if (message)
IOVEC_SET_STRING(iovec[n++], message);
- dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, priority & LOG_PRIMASK);
+ dispatch_message(s, iovec, n, ELEMENTSOF(iovec), ucred, tv, label, label_len, NULL, priority);
free(message);
- free(syslog_facility);
+ free(identifier);
+ free(pid);
free(syslog_priority);
+ free(syslog_facility);
+ free(syslog_identifier);
+ free(syslog_pid);
}
static bool valid_user_field(const char *p, size_t l) {
return true;
}
-static void process_native_message(Server *s, const void *buffer, size_t buffer_size, struct ucred *ucred, struct timeval *tv) {
+static void process_native_message(
+ Server *s,
+ const void *buffer, size_t buffer_size,
+ struct ucred *ucred,
+ struct timeval *tv,
+ const char *label, size_t label_len) {
+
struct iovec *iovec = NULL;
- unsigned n = 0, m = 0, j;
+ unsigned n = 0, m = 0, j, tn = (unsigned) -1;
const char *p;
size_t remaining;
int priority = LOG_INFO;
+ char *identifier = NULL, *message = NULL;
assert(s);
- assert(buffer || n == 0);
+ assert(buffer || buffer_size == 0);
p = buffer;
remaining = buffer_size;
if (e == p) {
/* Entry separator */
- dispatch_message(s, iovec, n, m, ucred, tv, priority);
+ dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority);
n = 0;
priority = LOG_INFO;
/* A property follows */
- if (n+16 >= m) {
+ if (n+N_IOVEC_META_FIELDS >= m) {
struct iovec *c;
unsigned u;
- u = MAX((n+16U) * 2U, 4U);
+ u = MAX((n+N_IOVEC_META_FIELDS+1) * 2U, 4U);
c = realloc(iovec, u * sizeof(struct iovec));
if (!c) {
- log_error("Out of memory");
+ log_oom();
break;
}
q = memchr(p, '=', e - p);
if (q) {
if (valid_user_field(p, q - p)) {
+ size_t l;
+
+ l = e - p;
+
/* If the field name starts with an
* underscore, skip the variable,
* since that indidates a trusted
* field */
iovec[n].iov_base = (char*) p;
- iovec[n].iov_len = e - p;
+ iovec[n].iov_len = l;
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';
+ if (l == 10 &&
+ memcmp(p, "PRIORITY=", 9) == 0 &&
+ p[9] >= '0' && p[9] <= '9')
+ priority = (priority & LOG_FACMASK) | (p[9] - '0');
+
+ else if (l == 17 &&
+ memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
+ p[16] >= '0' && p[16] <= '9')
+ priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
+
+ else if (l == 18 &&
+ memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
+ p[16] >= '0' && p[16] <= '9' &&
+ p[17] >= '0' && p[17] <= '9')
+ priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
+
+ else if (l >= 19 &&
+ memcmp(p, "SYSLOG_IDENTIFIER=", 18) == 0) {
+ char *t;
+
+ t = strndup(p + 18, l - 18);
+ if (t) {
+ free(identifier);
+ identifier = t;
+ }
+ } else if (l >= 8 &&
+ memcmp(p, "MESSAGE=", 8) == 0) {
+ char *t;
+
+ t = strndup(p + 8, l - 8);
+ if (t) {
+ free(message);
+ message = t;
+ }
+ }
}
remaining -= (e - p) + 1;
p = e + 1;
continue;
} else {
+ le64_t l_le;
uint64_t l;
char *k;
break;
}
- memcpy(&l, e + 1, sizeof(uint64_t));
- l = le64toh(l);
+ memcpy(&l_le, e + 1, sizeof(uint64_t));
+ l = le64toh(l_le);
if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
e[1+sizeof(uint64_t)+l] != '\n') {
k = malloc((e - p) + 1 + l);
if (!k) {
- log_error("Out of memory");
+ log_oom();
break;
}
}
}
- dispatch_message(s, iovec, n, m, ucred, tv, priority);
+ if (n <= 0)
+ goto finish;
+
+ tn = n++;
+ IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
+
+ if (message) {
+ if (s->forward_to_syslog)
+ forward_syslog(s, priority, identifier, message, ucred, tv);
+
+ if (s->forward_to_kmsg)
+ forward_kmsg(s, priority, identifier, message, ucred);
+
+ if (s->forward_to_console)
+ forward_console(s, priority, identifier, message, ucred);
+ }
+
+ dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority);
+
+finish:
+ for (j = 0; j < n; j++) {
+ if (j == tn)
+ continue;
- 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);
+ }
+
+ free(iovec);
+ free(identifier);
+ free(message);
}
-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;
+static void process_native_file(
+ Server *s,
+ int fd,
+ struct ucred *ucred,
+ struct timeval *tv,
+ const char *label, size_t label_len) {
+
+ struct stat st;
+ void *p;
+ ssize_t n;
assert(s);
- assert(p);
+ assert(fd >= 0);
- priority = s->priority;
+ /* Data is in the passed file, since it didn't fit in a
+ * datagram. We can't map the file here, since clients might
+ * then truncate it and trigger a SIGBUS for us. So let's
+ * stupidly read it */
- if (s->priority_prefix &&
- l > 3 &&
- p[0] == '<' &&
- p[1] >= '0' && p[1] <= '7' &&
- p[2] == '>') {
+ if (fstat(fd, &st) < 0) {
+ log_error("Failed to stat passed file, ignoring: %m");
+ return;
+ }
- priority = p[1] - '0';
- p += 3;
- l -= 3;
+ if (!S_ISREG(st.st_mode)) {
+ log_error("File passed is not regular. Ignoring.");
+ return;
}
- if (l <= 0)
+ if (st.st_size <= 0)
+ return;
+
+ if (st.st_size > ENTRY_SIZE_MAX) {
+ log_error("File passed too large. Ignoring.");
+ return;
+ }
+
+ p = malloc(st.st_size);
+ if (!p) {
+ log_oom();
+ return;
+ }
+
+ n = pread(fd, p, st.st_size, 0);
+ if (n < 0)
+ log_error("Failed to read file, ignoring: %s", strerror(-n));
+ else if (n > 0)
+ process_native_message(s, p, n, ucred, tv, label, label_len);
+
+ free(p);
+}
+
+static int stdout_stream_log(StdoutStream *s, const char *p) {
+ struct iovec iovec[N_IOVEC_META_FIELDS + 5];
+ char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
+ unsigned n = 0;
+ int priority;
+ char *label = NULL;
+ size_t label_len = 0;
+
+ assert(s);
+ assert(p);
+
+ if (isempty(p))
return 0;
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
+ priority = s->priority;
- tag_len = s->tag ? strlen(s->tag) + 2: 0;
- message = malloc(8 + tag_len + l);
- if (message) {
- memcpy(message, "MESSAGE=", 8);
+ if (s->level_prefix)
+ parse_syslog_priority((char**) &p, &priority);
- if (s->tag) {
- memcpy(message+8, s->tag, tag_len-2);
- memcpy(message+8+tag_len-2, ": ", 2);
- }
+ if (s->forward_to_syslog || s->server->forward_to_syslog)
+ forward_syslog(s->server, fixup_priority(priority), s->identifier, p, &s->ucred, NULL);
- memcpy(message+8+tag_len, p, l);
- iovec[n].iov_base = message;
- iovec[n].iov_len = 8+tag_len+l;
- n++;
- }
+ if (s->forward_to_kmsg || s->server->forward_to_kmsg)
+ forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
- dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, priority);
+ if (s->forward_to_console || s->server->forward_to_console)
+ forward_console(s->server, priority, s->identifier, p, &s->ucred);
- if (s->tee_console) {
- int console;
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
- 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++], ": ");
- }
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
- iovec[n].iov_base = (void*) p;
- iovec[n].iov_len = l;
- n++;
+ if (priority & LOG_FACMASK)
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
- IOVEC_SET_STRING(iovec[n++], (char*) "\n");
+ if (s->identifier) {
+ syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
+ if (syslog_identifier)
+ IOVEC_SET_STRING(iovec[n++], syslog_identifier);
+ }
- writev(console, iovec, n);
- }
+ message = strappend("MESSAGE=", p);
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
+
+#ifdef HAVE_SELINUX
+ if (s->security_context) {
+ label = (char*) s->security_context;
+ label_len = strlen((char*) s->security_context);
}
+#endif
+
+ dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority);
free(message);
free(syslog_priority);
+ free(syslog_facility);
+ free(syslog_identifier);
return 0;
}
-static int stdout_stream_line(StdoutStream *s, const char *p, size_t l) {
+static int stdout_stream_line(StdoutStream *s, char *p) {
+ int r;
+
assert(s);
assert(p);
- while (l > 0 && strchr(WHITESPACE, *p)) {
- l--;
- p++;
- }
-
- while (l > 0 && strchr(WHITESPACE, *(p+l-1)))
- l--;
+ p = strstrip(p);
switch (s->state) {
- case STDOUT_STREAM_TAG:
+ case STDOUT_STREAM_IDENTIFIER:
+ if (isempty(p))
+ s->identifier = NULL;
+ else {
+ s->identifier = strdup(p);
+ if (!s->identifier)
+ return log_oom();
+ }
- if (l > 0) {
- s->tag = strndup(p, l);
- if (!s->tag) {
- log_error("Out of memory");
- return -EINVAL;
+ s->state = STDOUT_STREAM_UNIT_ID;
+ return 0;
+
+ case STDOUT_STREAM_UNIT_ID:
+ if (s->ucred.uid == 0) {
+ if (isempty(p))
+ s->unit_id = NULL;
+ else {
+ s->unit_id = strdup(p);
+ if (!s->unit_id)
+ return log_oom();
}
}
return 0;
case STDOUT_STREAM_PRIORITY:
- if (l != 1 || *p < '0' || *p > '7') {
+ r = safe_atoi(p, &s->priority);
+ if (r < 0 || s->priority <= 0 || s->priority >= 999) {
log_warning("Failed to parse log priority line.");
return -EINVAL;
}
- s->priority = *p - '0';
- s->state = STDOUT_STREAM_PRIORITY_PREFIX;
+ s->state = STDOUT_STREAM_LEVEL_PREFIX;
+ return 0;
+
+ case STDOUT_STREAM_LEVEL_PREFIX:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse level prefix line.");
+ return -EINVAL;
+ }
+
+ s->level_prefix = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
+ return 0;
+
+ case STDOUT_STREAM_FORWARD_TO_SYSLOG:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse forward to syslog line.");
+ return -EINVAL;
+ }
+
+ s->forward_to_syslog = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
return 0;
- case STDOUT_STREAM_PRIORITY_PREFIX:
- if (l != 1 || *p < '0' || *p > '1') {
- log_warning("Failed to parse priority prefix line.");
+ case STDOUT_STREAM_FORWARD_TO_KMSG:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse copy to kmsg line.");
return -EINVAL;
}
- s->priority_prefix = *p - '0';
- s->state = STDOUT_STREAM_TEE_CONSOLE;
+ s->forward_to_kmsg = !!r;
+ s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
return 0;
- case STDOUT_STREAM_TEE_CONSOLE:
- if (l != 1 || *p < '0' || *p > '1') {
- log_warning("Failed to parse tee to console line.");
+ case STDOUT_STREAM_FORWARD_TO_CONSOLE:
+ r = parse_boolean(p);
+ if (r < 0) {
+ log_warning("Failed to parse copy to console line.");
return -EINVAL;
}
- s->tee_console = *p - '0';
+ s->forward_to_console = !!r;
s->state = STDOUT_STREAM_RUNNING;
return 0;
case STDOUT_STREAM_RUNNING:
- return stdout_stream_log(s, p, l);
+ return stdout_stream_log(s, p);
}
assert_not_reached("Unknown stream state");
size_t skip;
end = memchr(p, '\n', remaining);
- if (!end) {
- if (remaining >= LINE_MAX) {
- end = p + LINE_MAX;
- skip = LINE_MAX;
- } else
- break;
- } else
+ if (end)
skip = end - p + 1;
+ else if (remaining >= sizeof(s->buffer) - 1) {
+ end = p + sizeof(s->buffer) - 1;
+ skip = remaining;
+ } else
+ break;
- r = stdout_stream_line(s, p, end - p);
+ *end = 0;
+
+ r = stdout_stream_line(s, p);
if (r < 0)
return r;
}
if (force_flush && remaining > 0) {
- r = stdout_stream_line(s, p, remaining);
+ p[remaining] = 0;
+ r = stdout_stream_line(s, p);
if (r < 0)
return r;
close_nointr_nofail(s->fd);
}
- free(s->tag);
+#ifdef HAVE_SELINUX
+ if (s->security_context)
+ freecon(s->security_context);
+#endif
+
+ free(s->identifier);
free(s);
}
-static int stdout_stream_new(Server *s) {
- StdoutStream *stream;
- int fd, r;
- socklen_t len;
- struct epoll_event ev;
+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) {
+ close_nointr_nofail(fd);
+ return log_oom();
+ }
+
+ 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;
+ }
+
+#ifdef HAVE_SELINUX
+ if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
+ log_error("Failed to determine peer security context: %m");
+#endif
+
+ 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 bool is_us(const char *pid) {
+ pid_t t;
+
+ assert(pid);
+
+ if (parse_pid(pid, &t) < 0)
+ return false;
+
+ return t == getpid();
+}
+
+static void dev_kmsg_record(Server *s, char *p, size_t l) {
+ struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS];
+ char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL;
+ int priority, r;
+ unsigned n = 0, z = 0, j;
+ usec_t usec;
+ char *identifier = NULL, *pid = NULL, *e, *f, *k;
+ uint64_t serial;
+ size_t pl;
+
+ assert(s);
+ assert(p);
+
+ if (l <= 0)
+ return;
+
+ e = memchr(p, ',', l);
+ if (!e)
+ return;
+ *e = 0;
+
+ r = safe_atoi(p, &priority);
+ if (r < 0 || priority < 0 || priority > 999)
+ return;
+
+ if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
+ return;
+
+ l -= (e - p) + 1;
+ p = e + 1;
+ e = memchr(p, ',', l);
+ if (!e)
+ return;
+ *e = 0;
+
+ r = safe_atou64(p, &serial);
+ if (r < 0)
+ return;
+
+ if (s->kernel_seqnum) {
+ /* We already read this one? */
+ if (serial < *s->kernel_seqnum)
+ return;
+
+ /* Did we lose any? */
+ if (serial > *s->kernel_seqnum)
+ driver_message(s, SD_MESSAGE_JOURNAL_MISSED, "Missed %llu kernel messages", (unsigned long long) serial - *s->kernel_seqnum - 1);
+
+ /* Make sure we never read this one again. Note that
+ * we always store the next message serial we expect
+ * here, simply because this makes handling the first
+ * message with serial 0 easy. */
+ *s->kernel_seqnum = serial + 1;
+ }
+
+ l -= (e - p) + 1;
+ p = e + 1;
+ f = memchr(p, ';', l);
+ if (!f)
+ return;
+ /* Kernel 3.6 has the flags field, kernel 3.5 lacks that */
+ e = memchr(p, ',', l);
+ if (!e || f < e)
+ e = f;
+ *e = 0;
+
+ r = parse_usec(p, &usec);
+ if (r < 0)
+ return;
+
+ l -= (f - p) + 1;
+ p = f + 1;
+ e = memchr(p, '\n', l);
+ if (!e)
+ return;
+ *e = 0;
+
+ pl = e - p;
+ l -= (e - p) + 1;
+ k = e + 1;
+
+ for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) {
+ char *m;
+ /* Meta data fields attached */
+
+ if (*k != ' ')
+ break;
+
+ k ++, l --;
+
+ e = memchr(k, '\n', l);
+ if (!e)
+ return;
+
+ *e = 0;
- assert(s);
+ m = cunescape_length_with_prefix(k, e - k, "_KERNEL_");
+ if (!m)
+ break;
- fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
- if (fd < 0) {
- if (errno == EAGAIN)
- return 0;
+ IOVEC_SET_STRING(iovec[n++], m);
+ z++;
- log_error("Failed to accept stdout connection: %m");
- return -errno;
+ l -= (e - k) + 1;
+ k = e + 1;
}
- if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
- log_warning("Too many stdout streams, refusing connection.");
- close_nointr_nofail(fd);
- return 0;
- }
+ if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu",
+ (unsigned long long) usec) >= 0)
+ IOVEC_SET_STRING(iovec[n++], source_time);
- stream = new0(StdoutStream, 1);
- if (!stream) {
- log_error("Out of memory.");
- close_nointr_nofail(fd);
- return -ENOMEM;
- }
+ IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=kernel");
- stream->fd = fd;
+ if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
- 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 ((priority & LOG_FACMASK) == LOG_KERN)
+ IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel");
+ else {
+ read_identifier((const char**) &p, &identifier, &pid);
- if (shutdown(fd, SHUT_WR) < 0) {
- log_error("Failed to shutdown writing side of socket: %m");
- r = -errno;
- goto fail;
- }
+ /* Avoid any messages we generated ourselves via
+ * log_info() and friends. */
+ if (pid && is_us(pid))
+ goto finish;
- 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;
+ if (identifier) {
+ syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
+ if (syslog_identifier)
+ IOVEC_SET_STRING(iovec[n++], syslog_identifier);
+ }
+
+ if (pid) {
+ syslog_pid = strappend("SYSLOG_PID=", pid);
+ if (syslog_pid)
+ IOVEC_SET_STRING(iovec[n++], syslog_pid);
+ }
+
+ if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
}
- stream->server = s;
- LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
- s->n_stdout_streams ++;
+ message = cunescape_length_with_prefix(p, pl, "MESSAGE=");
+ if (message)
+ IOVEC_SET_STRING(iovec[n++], message);
- return 0;
+ dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority);
-fail:
- stdout_stream_free(stream);
- return r;
+finish:
+ for (j = 0; j < z; j++)
+ free(iovec[j].iov_base);
+
+ free(message);
+ free(syslog_priority);
+ free(syslog_identifier);
+ free(syslog_pid);
+ free(syslog_facility);
+ free(source_time);
+ free(identifier);
+ free(pid);
}
static int system_journal_open(Server *s) {
sd_id128_to_string(machine, ids);
- if (!s->system_journal) {
+ 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);
- /* 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);
+ fn = strjoin("/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);
+ r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, &s->system_metrics, 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);
+ server_fix_perms(s, s->system_journal, 0);
} else if (r < 0) {
if (r != -ENOENT && r != -EROFS)
}
}
- if (!s->runtime_journal) {
+ if (!s->runtime_journal &&
+ (s->storage != STORAGE_NONE)) {
- fn = join("/run/log/journal/", ids, "/system.journal", NULL);
+ fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL);
if (!fn)
return -ENOMEM;
* 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);
+ r = journal_file_open(fn, O_RDWR, 0640, &s->runtime_metrics, NULL, &s->runtime_journal);
free(fn);
if (r < 0) {
* it if necessary. */
(void) mkdir_parents(fn, 0755);
- r = journal_file_open(fn, O_RDWR|O_CREAT, 0640, NULL, &s->runtime_journal);
+ r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, &s->runtime_metrics, NULL, &s->runtime_journal);
free(fn);
if (r < 0) {
}
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);
+ server_fix_perms(s, s->runtime_journal, 0);
}
}
}
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)
+ if (s->storage != STORAGE_AUTO &&
+ s->storage != STORAGE_PERSISTENT)
return 0;
- ts = now(CLOCK_MONOTONIC);
- if (s->var_available_timestamp + RECHECK_VAR_AVAILABLE_USEC > ts)
+ if (!s->runtime_journal)
return 0;
- s->var_available_timestamp = ts;
-
system_journal_open(s);
if (!s->system_journal)
return 0;
+ log_info("Flushing to /var...");
+
r = sd_id128_get_machine(&machine);
if (r < 0) {
log_error("Failed to get machine id: %s", strerror(-r));
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);
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);
- }
+ if (r >= 0)
+ rm_rf("/run/log/journal", 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;
+static int server_read_dev_kmsg(Server *s) {
+ char buffer[8192+1]; /* the kernel-side limit per record is 8K currently */
+ ssize_t l;
assert(s);
+ assert(s->dev_kmsg_fd >= 0);
- zero(msghdr);
+ l = read(s->dev_kmsg_fd, buffer, sizeof(buffer) - 1);
+ if (l == 0)
+ return 0;
+ if (l < 0) {
+ /* Old kernels who don't allow reading from /dev/kmsg
+ * return EINVAL when we try. So handle this cleanly,
+ * but don' try to ever read from it again. */
+ if (errno == EINVAL) {
+ epoll_ctl(s->epoll_fd, EPOLL_CTL_DEL, s->dev_kmsg_fd, NULL);
+ return 0;
+ }
- zero(iovec);
- iovec.iov_base = (void*) buffer;
- iovec.iov_len = length;
- msghdr.msg_iov = &iovec;
- msghdr.msg_iovlen = 1;
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
- 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);
+ log_error("Failed to read from kernel: %m");
+ return -errno;
+ }
- zero(control);
- msghdr.msg_control = &control;
- msghdr.msg_controllen = sizeof(control);
+ dev_kmsg_record(s, buffer, l);
+ return 1;
+}
- 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;
+static int server_flush_dev_kmsg(Server *s) {
+ int r;
- /* 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. */
+ assert(s);
- if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
- return;
+ if (s->dev_kmsg_fd < 0)
+ return 0;
- if (errno == ESRCH) {
- struct ucred u;
+ if (!s->dev_kmsg_readable)
+ return 0;
- /* Hmm, presumably the sender process vanished
- * by now, so let's fix it as good as we
- * can, and retry */
+ log_info("Flushing /dev/kmsg...");
- u = *ucred;
- u.pid = getpid();
- memcpy(CMSG_DATA(cmsg), &u, sizeof(struct ucred));
+ for (;;) {
+ r = server_read_dev_kmsg(s);
+ if (r < 0)
+ return r;
- if (sendmsg(s->syslog_fd, &msghdr, MSG_NOSIGNAL) >= 0)
- return;
+ if (r == 0)
+ break;
}
- log_debug("Failed to forward syslog message: %m");
+ return 0;
}
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;
return -EIO;
if (errno == EINTR || errno == EAGAIN)
- return 0;
+ 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 0;
+ return 1;
+ }
+
+ if (sfsi.ssi_signo == SIGUSR2) {
+ server_rotate(s);
+ server_vacuum(s);
+ return 1;
}
- log_debug("Received SIG%s", signal_to_string(sfsi.ssi_signo));
return 0;
+ } else if (ev->data.fd == s->dev_kmsg_fd) {
+ int r;
+
+ if (ev->events != EPOLLIN) {
+ log_info("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) {
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(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 (v <= 0)
- return 1;
-
if (s->buffer_size < (size_t) v) {
void *b;
size_t l;
msghdr.msg_control = &control;
msghdr.msg_controllen = sizeof(control);
- n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT);
+ n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC);
if (n < 0) {
if (errno == EINTR || errno == EAGAIN)
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;
- e = memchr(s->buffer, '\n', n);
- if (e)
- *e = 0;
- else
- s->buffer[n] = 0;
+ if (n > 0 && n_fds == 0) {
+ e = memchr(s->buffer, '\n', n);
+ if (e)
+ *e = 0;
+ else
+ s->buffer[n] = 0;
+
+ 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)
+ process_native_message(s, s->buffer, n, ucred, tv, label, label_len);
+ else if (n == 0 && n_fds == 1)
+ 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.");
+ }
- 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);
+ close_many(fds, n_fds);
}
return 1;
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);
+ s->syslog_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
if (s->syslog_fd < 0) {
log_error("socket() failed: %m");
return -errno;
}
chmod(sa.un.sun_path, 0666);
- }
+ } else
+ fd_nonblock(s->syslog_fd, 1);
one = 1;
r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
return -errno;
}
+#ifdef HAVE_SELINUX
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one));
+ if (r < 0)
+ log_warning("SO_PASSSEC failed: %m");
+#endif
+
one = 1;
r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
if (r < 0) {
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 (s->native_fd < 0) {
- s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ s->native_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 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));
+ strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
unlink(sa.un.sun_path);
}
chmod(sa.un.sun_path, 0666);
- }
+ } else
+ fd_nonblock(s->native_fd, 1);
one = 1;
r = setsockopt(s->native_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
return -errno;
}
+#ifdef HAVE_SELINUX
+ one = 1;
+ r = setsockopt(s->syslog_fd, SOL_SOCKET, SO_PASSSEC, &one, sizeof(one));
+ if (r < 0)
+ log_warning("SO_PASSSEC failed: %m");
+#endif
+
one = 1;
r = setsockopt(s->native_fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one));
if (r < 0) {
if (s->stdout_fd < 0) {
- s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
+ s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 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));
+ strncpy(sa.un.sun_path, "/run/systemd/journal/stdout", sizeof(sa.un.sun_path));
unlink(sa.un.sun_path);
log_error("liste() failed: %m");
return -errno;
}
- }
+ } else
+ fd_nonblock(s->stdout_fd, 1);
zero(ev);
ev.events = EPOLLIN;
return 0;
}
+static int open_dev_kmsg(Server *s) {
+ struct epoll_event ev;
+
+ assert(s);
+
+ s->dev_kmsg_fd = open("/dev/kmsg", O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
+ if (s->dev_kmsg_fd < 0) {
+ log_warning("Failed to open /dev/kmsg, ignoring: %m");
+ return 0;
+ }
+
+ zero(ev);
+ ev.events = EPOLLIN;
+ ev.data.fd = s->dev_kmsg_fd;
+ if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->dev_kmsg_fd, &ev) < 0) {
+
+ /* This will fail with EPERM on older kernels where
+ * /dev/kmsg is not readable. */
+ if (errno == EPERM)
+ return 0;
+
+ log_error("Failed to add /dev/kmsg fd to epoll object: %m");
+ return -errno;
+ }
+
+ s->dev_kmsg_readable = true;
+
+ return 0;
+}
+
+static int open_kernel_seqnum(Server *s) {
+ int fd;
+ uint64_t *p;
+
+ assert(s);
+
+ /* We store the seqnum we last read in an mmaped file. That
+ * way we can just use it like a variable, but it is
+ * persistant and automatically flushed at reboot. */
+
+ fd = open("/run/systemd/journal/kernel-seqnum", O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0644);
+ if (fd < 0) {
+ log_error("Failed to open /run/systemd/journal/kernel-seqnum, ignoring: %m");
+ return 0;
+ }
+
+ if (posix_fallocate(fd, 0, sizeof(uint64_t)) < 0) {
+ log_error("Failed to allocate sequential number file, ignoring: %m");
+ close_nointr_nofail(fd);
+ return 0;
+ }
+
+ p = mmap(NULL, sizeof(uint64_t), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (p == MAP_FAILED) {
+ log_error("Failed to map sequential number file, ignoring: %m");
+ close_nointr_nofail(fd);
+ return 0;
+ }
+
+ close_nointr_nofail(fd);
+ s->kernel_seqnum = p;
+
+ 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);
+ 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);
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 = -1;
+ s->syslog_fd = s->native_fd = s->stdout_fd = s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1;
s->compress = 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) {
- log_error("Out of memory.");
- return -ENOMEM;
- }
+ if (!s->user_journals)
+ return log_oom();
s->epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (s->epoll_fd < 0) {
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 (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.");
s->native_fd = fd;
- } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/stdout", 0) > 0) {
+ } 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.");
if (r < 0)
return r;
- r = system_journal_open(s);
+ r = open_dev_kmsg(s);
+ if (r < 0)
+ return r;
+
+ r = open_kernel_seqnum(s);
if (r < 0)
return r;
if (r < 0)
return r;
- s->rate_limit = journal_rate_limit_new(DEFAULT_RATE_LIMIT_INTERVAL, DEFAULT_RATE_LIMIT_BURST);
+ 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;
}
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);
}
int main(int argc, char *argv[]) {
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;
+ server_vacuum(&server);
+ server_flush_to_var(&server);
+ server_flush_dev_kmsg(&server);
+
log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
+ 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;
}
log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
+ driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
finish:
sd_notify(false,
~ianmdlvl / elogind.git / blobdiff