#include <fcntl.h>
#include <unistd.h>
#include <stddef.h>
-#include <sys/epoll.h>
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#endif
+#include "sd-event.h"
+#include "sd-daemon.h"
#include "socket-util.h"
#include "selinux-util.h"
+#include "mkdir.h"
+#include "fileio.h"
#include "journald-server.h"
#include "journald-stream.h"
#include "journald-syslog.h"
#include "journald-kmsg.h"
#include "journald-console.h"
+#include "journald-wall.h"
#define STDOUT_STREAMS_MAX 4096
bool forward_to_kmsg:1;
bool forward_to_console:1;
+ bool fdstore:1;
+
char buffer[LINE_MAX+1];
size_t length;
+ sd_event_source *event_source;
+
+ char *state_file;
+
LIST_FIELDS(StdoutStream, stdout_stream);
};
+void stdout_stream_free(StdoutStream *s) {
+ if (!s)
+ return;
+
+ if (s->server) {
+ assert(s->server->n_stdout_streams > 0);
+ s->server->n_stdout_streams --;
+ LIST_REMOVE(stdout_stream, s->server->stdout_streams, s);
+ }
+
+ if (s->event_source) {
+ sd_event_source_set_enabled(s->event_source, SD_EVENT_OFF);
+ s->event_source = sd_event_source_unref(s->event_source);
+ }
+
+ safe_close(s->fd);
+
+#ifdef HAVE_SELINUX
+ if (s->security_context)
+ freecon(s->security_context);
+#endif
+
+ free(s->identifier);
+ free(s->unit_id);
+ free(s->state_file);
+
+ free(s);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(StdoutStream*, stdout_stream_free);
+
+static void stdout_stream_destroy(StdoutStream *s) {
+ if (!s)
+ return;
+
+ if (s->state_file)
+ unlink(s->state_file);
+
+ stdout_stream_free(s);
+}
+
+static int stdout_stream_save(StdoutStream *s) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(s);
+
+ if (s->state != STDOUT_STREAM_RUNNING)
+ return 0;
+
+ if (!s->state_file) {
+ struct stat st;
+
+ r = fstat(s->fd, &st);
+ if (r < 0)
+ return log_warning_errno(errno, "Failed to stat connected stream: %m");
+
+ /* We use device and inode numbers as identifier for the stream */
+ if (asprintf(&s->state_file, "/run/systemd/journal/streams/%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino) < 0)
+ return log_oom();
+ }
+
+ mkdir_p("/run/systemd/journal/streams", 0755);
+
+ r = fopen_temporary(s->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fprintf(f,
+ "# This is private data. Do not parse\n"
+ "PRIORITY=%i\n"
+ "LEVEL_PREFIX=%i\n"
+ "FORWARD_TO_SYSLOG=%i\n"
+ "FORWARD_TO_KMSG=%i\n"
+ "FORWARD_TO_CONSOLE=%i\n",
+ s->priority,
+ s->level_prefix,
+ s->forward_to_syslog,
+ s->forward_to_kmsg,
+ s->forward_to_console);
+
+ if (!isempty(s->identifier)) {
+ _cleanup_free_ char *escaped;
+
+ escaped = cescape(s->identifier);
+ if (!escaped) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ fprintf(f, "IDENTIFIER=%s\n", escaped);
+ }
+
+ if (!isempty(s->unit_id)) {
+ _cleanup_free_ char *escaped;
+
+ escaped = cescape(s->unit_id);
+ if (!escaped) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ fprintf(f, "UNIT=%s\n", escaped);
+ }
+
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto finish;
+
+ if (rename(temp_path, s->state_file) < 0) {
+ r = -errno;
+ goto finish;
+ }
+
+ free(temp_path);
+ temp_path = NULL;
+
+ /* Store the connection fd in PID 1, so that we get it passed
+ * in again on next start */
+ if (!s->fdstore) {
+ sd_pid_notify_with_fds(0, false, "FDSTORE=1", &s->fd, 1);
+ s->fdstore = true;
+ }
+
+finish:
+ if (temp_path)
+ unlink(temp_path);
+
+ if (r < 0)
+ log_error_errno(r, "Failed to save stream data %s: %m", s->state_file);
+
+ return r;
+}
+
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 syslog_priority[] = "PRIORITY=\0";
+ char syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(priority)];
+ _cleanup_free_ char *message = NULL, *syslog_identifier = NULL;
+ unsigned n = 0;
char *label = NULL;
size_t label_len = 0;
priority = s->priority;
if (s->level_prefix)
- syslog_parse_priority((char**) &p, &priority, false);
+ syslog_parse_priority(&p, &priority, false);
if (s->forward_to_syslog || s->server->forward_to_syslog)
server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL);
if (s->forward_to_console || s->server->forward_to_console)
server_forward_console(s->server, priority, s->identifier, p, &s->ucred);
+ if (s->server->forward_to_wall)
+ server_forward_wall(s->server, priority, s->identifier, p, &s->ucred);
+
IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
+ syslog_priority[strlen("PRIORITY=")] = '0' + LOG_PRI(priority);
+ IOVEC_SET_STRING(iovec[n++], syslog_priority);
- if (priority & LOG_FACMASK)
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
+ if (priority & LOG_FACMASK) {
+ snprintf(syslog_facility, sizeof(syslog_facility), "SYSLOG_FACILITY=%i", LOG_FAC(priority));
+ IOVEC_SET_STRING(iovec[n++], syslog_facility);
+ }
if (s->identifier) {
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
#endif
server_dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority, 0);
-
- free(message);
- free(syslog_priority);
- free(syslog_facility);
- free(syslog_identifier);
-
return 0;
}
s->forward_to_console = !!r;
s->state = STDOUT_STREAM_RUNNING;
+
+ /* Try to save the stream, so that journald can be restarted and we can recover */
+ (void) stdout_stream_save(s);
return 0;
case STDOUT_STREAM_RUNNING:
return 0;
}
-int stdout_stream_process(StdoutStream *s) {
+static int stdout_stream_process(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
+ StdoutStream *s = userdata;
ssize_t l;
int r;
assert(s);
+ if ((revents|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
+ log_error("Got invalid event from epoll for stdout stream: %"PRIx32, revents);
+ goto terminate;
+ }
+
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;
+ log_warning_errno(errno, "Failed to read from stream: %m");
+ goto terminate;
}
if (l == 0) {
- r = stdout_stream_scan(s, true);
- if (r < 0)
- return r;
-
- return 0;
+ stdout_stream_scan(s, true);
+ goto terminate;
}
s->length += l;
r = stdout_stream_scan(s, false);
if (r < 0)
- return r;
+ goto terminate;
return 1;
+terminate:
+ stdout_stream_destroy(s);
+ return 0;
}
-void stdout_stream_free(StdoutStream *s) {
+static int stdout_stream_install(Server *s, int fd, StdoutStream **ret) {
+ _cleanup_(stdout_stream_freep) StdoutStream *stream = NULL;
+ int r;
+
assert(s);
+ assert(fd >= 0);
- if (s->server) {
- assert(s->server->n_stdout_streams > 0);
- s->server->n_stdout_streams --;
- LIST_REMOVE(stdout_stream, s->server->stdout_streams, s);
- }
+ stream = new0(StdoutStream, 1);
+ if (!stream)
+ return log_oom();
- if (s->fd >= 0) {
- if (s->server)
- epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
+ stream->fd = -1;
+ stream->priority = LOG_INFO;
- close_nointr_nofail(s->fd);
- }
+ r = getpeercred(fd, &stream->ucred);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine peer credentials: %m");
#ifdef HAVE_SELINUX
- if (s->security_context)
- freecon(s->security_context);
+ if (mac_selinux_use()) {
+ if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
+ log_error_errno(errno, "Failed to determine peer security context: %m");
+ }
#endif
- free(s->identifier);
- free(s->unit_id);
- free(s);
+ (void) shutdown(fd, SHUT_WR);
+
+ r = sd_event_add_io(s->event, &stream->event_source, fd, EPOLLIN, stdout_stream_process, stream);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add stream to event loop: %m");
+
+ r = sd_event_source_set_priority(stream->event_source, SD_EVENT_PRIORITY_NORMAL+5);
+ if (r < 0)
+ return log_error_errno(r, "Failed to adjust stdout event source priority: %m");
+
+ stream->fd = fd;
+
+ stream->server = s;
+ LIST_PREPEND(stdout_stream, s->stdout_streams, stream);
+ s->n_stdout_streams ++;
+
+ if (ret)
+ *ret = stream;
+
+ stream = NULL;
+
+ return 0;
}
-int stdout_stream_new(Server *s) {
- StdoutStream *stream;
- int fd, r;
- socklen_t len;
- struct epoll_event ev;
+static int stdout_stream_new(sd_event_source *es, int listen_fd, uint32_t revents, void *userdata) {
+ _cleanup_close_ int fd = -1;
+ Server *s = userdata;
+ int r;
assert(s);
+ if (revents != EPOLLIN) {
+ log_error("Got invalid event from epoll for stdout server fd: %"PRIx32, revents);
+ return -EIO;
+ }
+
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");
+ log_error_errno(errno, "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();
+ r = stdout_stream_install(s, fd, NULL);
+ if (r < 0)
+ return r;
+
+ fd = -1;
+ return 0;
+}
+
+static int stdout_stream_load(StdoutStream *stream, const char *fname) {
+ _cleanup_free_ char
+ *priority = NULL,
+ *level_prefix = NULL,
+ *forward_to_syslog = NULL,
+ *forward_to_kmsg = NULL,
+ *forward_to_console = NULL;
+ int r;
+
+ assert(stream);
+ assert(fname);
+
+ if (!stream->state_file) {
+ stream->state_file = strappend("/run/systemd/journal/streams/", fname);
+ if (!stream->state_file)
+ return log_oom();
}
- stream->fd = fd;
+ r = parse_env_file(stream->state_file, NEWLINE,
+ "PRIORITY", &priority,
+ "LEVEL_PREFIX", &level_prefix,
+ "FORWARD_TO_SYSLOG", &forward_to_syslog,
+ "FORWARD_TO_KMSG", &forward_to_kmsg,
+ "FORWARD_TO_CONSOLE", &forward_to_console,
+ "IDENTIFIER", &stream->identifier,
+ "UNIT", &stream->unit_id,
+ NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read: %s", stream->state_file);
- 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) {
+ int p;
+
+ p = log_level_from_string(priority);
+ if (p >= 0)
+ stream->priority = p;
}
-#ifdef HAVE_SELINUX
- if (use_selinux()) {
- if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
- log_error("Failed to determine peer security context: %m");
+ if (level_prefix) {
+ r = parse_boolean(level_prefix);
+ if (r >= 0)
+ stream->level_prefix = r;
}
-#endif
- if (shutdown(fd, SHUT_WR) < 0) {
- log_error("Failed to shutdown writing side of socket: %m");
- r = -errno;
- goto fail;
+ if (forward_to_syslog) {
+ r = parse_boolean(forward_to_syslog);
+ if (r >= 0)
+ stream->forward_to_syslog = r;
}
- 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 (forward_to_kmsg) {
+ r = parse_boolean(forward_to_kmsg);
+ if (r >= 0)
+ stream->forward_to_kmsg = r;
}
- stream->server = s;
- LIST_PREPEND(stdout_stream, s->stdout_streams, stream);
- s->n_stdout_streams ++;
+ if (forward_to_console) {
+ r = parse_boolean(forward_to_console);
+ if (r >= 0)
+ stream->forward_to_console = r;
+ }
+
+ return 0;
+}
+
+static int stdout_stream_restore(Server *s, const char *fname, int fd) {
+ StdoutStream *stream;
+ int r;
+
+ assert(s);
+ assert(fname);
+ assert(fd >= 0);
+
+ if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
+ log_warning("Too many stdout streams, refusing restoring of stream.");
+ return -ENOBUFS;
+ }
+
+ r = stdout_stream_install(s, fd, &stream);
+ if (r < 0)
+ return r;
+
+ stream->state = STDOUT_STREAM_RUNNING;
+ stream->fdstore = true;
+
+ /* Ignore all parsing errors */
+ (void) stdout_stream_load(stream, fname);
+
+ return 0;
+}
+
+static int server_restore_streams(Server *s, FDSet *fds) {
+ _cleanup_closedir_ DIR *d = NULL;
+ struct dirent *de;
+ int r;
+
+ d = opendir("/run/systemd/journal/streams");
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ return log_warning_errno(errno, "Failed to enumerate /run/systemd/journal/streams: %m");
+ }
+
+ FOREACH_DIRENT(de, d, goto fail) {
+ unsigned long st_dev, st_ino;
+ bool found = false;
+ Iterator i;
+ int fd;
+
+ if (sscanf(de->d_name, "%lu:%lu", &st_dev, &st_ino) != 2)
+ continue;
+
+ FDSET_FOREACH(fd, fds, i) {
+ struct stat st;
+
+ if (fstat(fd, &st) < 0)
+ return log_error_errno(errno, "Failed to stat %s: %m", de->d_name);
+
+ if (S_ISSOCK(st.st_mode) && st.st_dev == st_dev && st.st_ino == st_ino) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ /* No file descriptor? Then let's delete the state file */
+ log_debug("Cannot restore stream file %s", de->d_name);
+ unlinkat(dirfd(d), de->d_name, 0);
+ continue;
+ }
+
+ fdset_remove(fds, fd);
+
+ r = stdout_stream_restore(s, de->d_name, fd);
+ if (r < 0)
+ safe_close(fd);
+ }
return 0;
fail:
- stdout_stream_free(stream);
- return r;
+ return log_error_errno(errno, "Failed to read streams directory: %m");
}
-int server_open_stdout_socket(Server *s) {
+int server_open_stdout_socket(Server *s, FDSet *fds) {
int r;
- struct epoll_event ev;
assert(s);
};
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;
- }
+ if (s->stdout_fd < 0)
+ return log_error_errno(errno, "socket() failed: %m");
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;
- }
+ if (r < 0)
+ return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path);
chmod(sa.un.sun_path, 0666);
- if (listen(s->stdout_fd, SOMAXCONN) < 0) {
- log_error("listen() failed: %m");
- return -errno;
- }
+ if (listen(s->stdout_fd, SOMAXCONN) < 0)
+ return log_error_errno(errno, "listen(%s) failed: %m", sa.un.sun_path);
} else
fd_nonblock(s->stdout_fd, 1);
- 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;
- }
+ r = sd_event_add_io(s->event, &s->stdout_event_source, s->stdout_fd, EPOLLIN, stdout_stream_new, s);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add stdout server fd to event source: %m");
+
+ r = sd_event_source_set_priority(s->stdout_event_source, SD_EVENT_PRIORITY_NORMAL+10);
+ if (r < 0)
+ return log_error_errno(r, "Failed to adjust priority of stdout server event source: %m");
+
+ /* Try to restore streams, but don't bother if this fails */
+ (void) server_restore_streams(s, fds);
return 0;
}
~ianmdlvl / elogind.git / blobdiff