1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include <selinux/selinux.h>
31 #include "socket-util.h"
32 #include "selinux-util.h"
33 #include "journald-server.h"
34 #include "journald-stream.h"
35 #include "journald-syslog.h"
36 #include "journald-kmsg.h"
37 #include "journald-console.h"
39 #define STDOUT_STREAMS_MAX 4096
41 typedef enum StdoutStreamState {
42 STDOUT_STREAM_IDENTIFIER,
43 STDOUT_STREAM_UNIT_ID,
44 STDOUT_STREAM_PRIORITY,
45 STDOUT_STREAM_LEVEL_PREFIX,
46 STDOUT_STREAM_FORWARD_TO_SYSLOG,
47 STDOUT_STREAM_FORWARD_TO_KMSG,
48 STDOUT_STREAM_FORWARD_TO_CONSOLE,
54 StdoutStreamState state;
60 security_context_t security_context;
67 bool forward_to_syslog:1;
68 bool forward_to_kmsg:1;
69 bool forward_to_console:1;
71 char buffer[LINE_MAX+1];
74 sd_event_source *event_source;
76 LIST_FIELDS(StdoutStream, stdout_stream);
79 static int stdout_stream_log(StdoutStream *s, const char *p) {
80 struct iovec iovec[N_IOVEC_META_FIELDS + 5];
82 char syslog_priority[] = "PRIORITY=\0";
83 char syslog_facility[sizeof("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(priority)];
84 _cleanup_free_ char *message = NULL, *syslog_identifier = NULL;
95 priority = s->priority;
98 syslog_parse_priority(&p, &priority, false);
100 if (s->forward_to_syslog || s->server->forward_to_syslog)
101 server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL);
103 if (s->forward_to_kmsg || s->server->forward_to_kmsg)
104 server_forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
106 if (s->forward_to_console || s->server->forward_to_console)
107 server_forward_console(s->server, priority, s->identifier, p, &s->ucred);
109 IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
111 syslog_priority[strlen("PRIORITY=")] = '0' + LOG_PRI(priority);
112 IOVEC_SET_STRING(iovec[n++], syslog_priority);
114 if (priority & LOG_FACMASK) {
115 snprintf(syslog_facility, sizeof(syslog_facility), "SYSLOG_FACILITY=%i", LOG_FAC(priority));
116 IOVEC_SET_STRING(iovec[n++], syslog_facility);
120 syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
121 if (syslog_identifier)
122 IOVEC_SET_STRING(iovec[n++], syslog_identifier);
125 message = strappend("MESSAGE=", p);
127 IOVEC_SET_STRING(iovec[n++], message);
130 if (s->security_context) {
131 label = (char*) s->security_context;
132 label_len = strlen((char*) s->security_context);
136 server_dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority, 0);
140 static int stdout_stream_line(StdoutStream *s, char *p) {
150 case STDOUT_STREAM_IDENTIFIER:
152 s->identifier = NULL;
154 s->identifier = strdup(p);
159 s->state = STDOUT_STREAM_UNIT_ID;
162 case STDOUT_STREAM_UNIT_ID:
163 if (s->ucred.uid == 0) {
167 s->unit_id = strdup(p);
173 s->state = STDOUT_STREAM_PRIORITY;
176 case STDOUT_STREAM_PRIORITY:
177 r = safe_atoi(p, &s->priority);
178 if (r < 0 || s->priority < 0 || s->priority > 999) {
179 log_warning("Failed to parse log priority line.");
183 s->state = STDOUT_STREAM_LEVEL_PREFIX;
186 case STDOUT_STREAM_LEVEL_PREFIX:
187 r = parse_boolean(p);
189 log_warning("Failed to parse level prefix line.");
193 s->level_prefix = !!r;
194 s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
197 case STDOUT_STREAM_FORWARD_TO_SYSLOG:
198 r = parse_boolean(p);
200 log_warning("Failed to parse forward to syslog line.");
204 s->forward_to_syslog = !!r;
205 s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
208 case STDOUT_STREAM_FORWARD_TO_KMSG:
209 r = parse_boolean(p);
211 log_warning("Failed to parse copy to kmsg line.");
215 s->forward_to_kmsg = !!r;
216 s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
219 case STDOUT_STREAM_FORWARD_TO_CONSOLE:
220 r = parse_boolean(p);
222 log_warning("Failed to parse copy to console line.");
226 s->forward_to_console = !!r;
227 s->state = STDOUT_STREAM_RUNNING;
230 case STDOUT_STREAM_RUNNING:
231 return stdout_stream_log(s, p);
234 assert_not_reached("Unknown stream state");
237 static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
245 remaining = s->length;
250 end = memchr(p, '\n', remaining);
253 else if (remaining >= sizeof(s->buffer) - 1) {
254 end = p + sizeof(s->buffer) - 1;
261 r = stdout_stream_line(s, p);
269 if (force_flush && remaining > 0) {
271 r = stdout_stream_line(s, p);
280 memmove(s->buffer, p, remaining);
281 s->length = remaining;
287 static int stdout_stream_process(sd_event_source *es, int fd, uint32_t revents, void *userdata) {
288 StdoutStream *s = userdata;
294 if ((revents|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) {
295 log_error("Got invalid event from epoll for stdout stream: %"PRIx32, revents);
299 l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
305 log_warning("Failed to read from stream: %m");
310 stdout_stream_scan(s, true);
315 r = stdout_stream_scan(s, false);
322 stdout_stream_free(s);
326 void stdout_stream_free(StdoutStream *s) {
330 assert(s->server->n_stdout_streams > 0);
331 s->server->n_stdout_streams --;
332 LIST_REMOVE(stdout_stream, s->server->stdout_streams, s);
335 if (s->event_source) {
336 sd_event_source_set_enabled(s->event_source, SD_EVENT_OFF);
337 s->event_source = sd_event_source_unref(s->event_source);
341 close_nointr_nofail(s->fd);
344 if (s->security_context)
345 freecon(s->security_context);
353 static int stdout_stream_new(sd_event_source *es, int listen_fd, uint32_t revents, void *userdata) {
354 Server *s = userdata;
355 StdoutStream *stream;
360 if (revents != EPOLLIN) {
361 log_error("Got invalid event from epoll for stdout server fd: %"PRIx32, revents);
365 fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
370 log_error("Failed to accept stdout connection: %m");
374 if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
375 log_warning("Too many stdout streams, refusing connection.");
376 close_nointr_nofail(fd);
380 stream = new0(StdoutStream, 1);
382 close_nointr_nofail(fd);
388 r = getpeercred(fd, &stream->ucred);
390 log_error("Failed to determine peer credentials: %m");
396 if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
397 log_error("Failed to determine peer security context: %m");
401 if (shutdown(fd, SHUT_WR) < 0) {
402 log_error("Failed to shutdown writing side of socket: %m");
406 r = sd_event_add_io(s->event, fd, EPOLLIN, stdout_stream_process, stream, &stream->event_source);
408 log_error("Failed to add stream to event loop: %s", strerror(-r));
412 r = sd_event_source_set_priority(stream->event_source, SD_EVENT_PRIORITY_NORMAL+5);
414 log_error("Failed to adjust stdout event source priority: %s", strerror(-r));
419 LIST_PREPEND(stdout_stream, s->stdout_streams, stream);
420 s->n_stdout_streams ++;
425 stdout_stream_free(stream);
429 int server_open_stdout_socket(Server *s) {
434 if (s->stdout_fd < 0) {
435 union sockaddr_union sa = {
436 .un.sun_family = AF_UNIX,
437 .un.sun_path = "/run/systemd/journal/stdout",
440 s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
441 if (s->stdout_fd < 0) {
442 log_error("socket() failed: %m");
446 unlink(sa.un.sun_path);
448 r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path));
450 log_error("bind() failed: %m");
454 chmod(sa.un.sun_path, 0666);
456 if (listen(s->stdout_fd, SOMAXCONN) < 0) {
457 log_error("listen() failed: %m");
461 fd_nonblock(s->stdout_fd, 1);
463 r = sd_event_add_io(s->event, s->stdout_fd, EPOLLIN, stdout_stream_new, s, &s->stdout_event_source);
465 log_error("Failed to add stdout server fd to event source: %s", strerror(-r));
469 r = sd_event_source_set_priority(s->stdout_event_source, SD_EVENT_PRIORITY_NORMAL+10);
471 log_error("Failed to adjust priority of stdout server event source: %s", strerror(-r));