4 Copyright (C) Andrew Tridgell 2008
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include "lib/tevent/tevent.h"
22 #include "../include/ctdb_client.h"
23 #include "../include/ctdb_private.h"
24 #include "system/syslog.h"
25 #include "system/time.h"
26 #include "system/filesys.h"
28 struct syslog_message {
35 struct ctdb_syslog_state {
40 static int syslogd_is_started = 0;
43 /* called when child is finished
44 * this is for the syslog daemon, we can not use DEBUG here
46 static void ctdb_syslog_handler(struct event_context *ev, struct fd_event *fde,
47 uint16_t flags, void *p)
49 struct ctdb_syslog_state *state = talloc_get_type(p, struct ctdb_syslog_state);
53 struct syslog_message *msg;
59 count = recv(state->syslog_fd, str, sizeof(str), 0);
60 if (count < sizeof(struct syslog_message)) {
63 msg = (struct syslog_message *)str;
65 syslog(msg->level, "%s", msg->message);
69 /* called when the pipd from the main daemon has closed
70 * this is for the syslog daemon, we can not use DEBUG here
72 static void ctdb_syslog_terminate_handler(struct event_context *ev, struct fd_event *fde,
73 uint16_t flags, void *p)
75 syslog(LOG_ERR, "Shutting down SYSLOG daemon with pid:%d", (int)getpid());
82 * this is for the syslog daemon, we can not use DEBUG here
84 int start_syslog_daemon(struct ctdb_context *ctdb)
86 struct sockaddr_in syslog_sin;
87 struct ctdb_syslog_state *state;
88 struct tevent_fd *fde;
90 state = talloc(ctdb, struct ctdb_syslog_state);
91 CTDB_NO_MEMORY(ctdb, state);
93 if (pipe(state->fd) != 0) {
94 printf("Failed to create syslog pipe\n");
99 ctdb->syslogd_pid = ctdb_fork(ctdb);
100 if (ctdb->syslogd_pid == (pid_t)-1) {
101 printf("Failed to create syslog child process\n");
108 syslogd_is_started = 1;
110 if (ctdb->syslogd_pid != 0) {
111 DEBUG(DEBUG_ERR,("Starting SYSLOG child process with pid:%d\n", (int)ctdb->syslogd_pid));
114 set_close_on_exec(state->fd[0]);
119 debug_extra = talloc_asprintf(NULL, "syslogd:");
120 talloc_free(ctdb->ev);
121 ctdb->ev = event_context_init(NULL);
122 tevent_loop_allow_nesting(ctdb->ev);
124 syslog(LOG_ERR, "Starting SYSLOG daemon with pid:%d", (int)getpid());
127 set_close_on_exec(state->fd[1]);
128 fde = event_add_fd(ctdb->ev, state, state->fd[1], EVENT_FD_READ,
129 ctdb_syslog_terminate_handler, state);
130 tevent_fd_set_auto_close(fde);
132 state->syslog_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
133 if (state->syslog_fd == -1) {
134 printf("Failed to create syslog socket\n");
138 set_close_on_exec(state->syslog_fd);
140 syslog_sin.sin_family = AF_INET;
141 syslog_sin.sin_port = htons(CTDB_PORT);
142 syslog_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
144 if (bind(state->syslog_fd, &syslog_sin, sizeof(syslog_sin)) == -1) {
145 if (errno == EADDRINUSE) {
146 /* this is ok, we already have a syslog daemon */
149 printf("syslog daemon failed to bind to socket. errno:%d(%s)\n", errno, strerror(errno));
154 fde = event_add_fd(ctdb->ev, state, state->syslog_fd, EVENT_FD_READ,
155 ctdb_syslog_handler, state);
156 tevent_fd_set_auto_close(fde);
158 event_loop_wait(ctdb->ev);
160 /* this should not happen */
164 struct ctdb_log_state {
165 struct ctdb_context *ctdb;
170 void (*logfn)(const char *, uint16_t, void *);
174 /* we need this global to keep the DEBUG() syntax */
175 static struct ctdb_log_state *log_state;
178 syslog logging function
180 static void ctdb_syslog_log(const char *format, va_list ap)
182 struct syslog_message *msg;
183 int level = LOG_DEBUG;
187 struct sockaddr_in syslog_sin;
189 ret = vasprintf(&s, format, ap);
194 switch (this_log_level) {
221 len = offsetof(struct syslog_message, message) + strlen(debug_extra) + strlen(s) + 1;
228 msg->len = strlen(debug_extra) + strlen(s);
229 strcpy(msg->message, debug_extra);
230 strcat(msg->message, s);
232 if (syslogd_is_started == 0) {
233 syslog(msg->level, "%s", msg->message);
235 syslog_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
236 if (syslog_fd == -1) {
237 printf("Failed to create syslog socket\n");
243 syslog_sin.sin_family = AF_INET;
244 syslog_sin.sin_port = htons(CTDB_PORT);
245 syslog_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
248 ret = sendto(syslog_fd, msg, len, 0, &syslog_sin, sizeof(syslog_sin));
249 /* no point in checking here since we cant log an error */
260 log file logging function
262 static void ctdb_logfile_log(const char *format, va_list ap)
271 ret = vasprintf(&s, format, ap);
273 const char *errstr = "vasprintf failed\n";
275 write(log_state->fd, errstr, strlen(errstr));
279 t = timeval_current();
280 tm = localtime(&t.tv_sec);
282 strftime(tbuf,sizeof(tbuf)-1,"%Y/%m/%d %H:%M:%S", tm);
284 ret = asprintf(&s2, "%s.%06u [%s%5u]: %s",
285 tbuf, (unsigned)t.tv_usec,
286 debug_extra, (unsigned)getpid(), s);
289 const char *errstr = "asprintf failed\n";
290 write(log_state->fd, errstr, strlen(errstr));
294 write(log_state->fd, s2, strlen(s2));
299 static void ctdb_logfile_log_add(const char *format, va_list ap)
304 ret = vasprintf(&s, format, ap);
306 const char *errstr = "vasprintf failed\n";
308 write(log_state->fd, errstr, strlen(errstr));
313 write(log_state->fd, s, strlen(s));
321 choose the logfile location
323 int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile, bool use_syslog)
327 ctdb->log = talloc_zero(ctdb, struct ctdb_log_state);
328 if (ctdb->log == NULL) {
329 printf("talloc_zero failed\n");
333 ctdb->log->ctdb = ctdb;
334 log_state = ctdb->log;
337 do_debug_v = ctdb_syslog_log;
338 do_debug_add_v = ctdb_syslog_log;
339 ctdb->log->use_syslog = true;
340 } else if (logfile == NULL || strcmp(logfile, "-") == 0) {
341 do_debug_v = ctdb_logfile_log;
342 do_debug_add_v = ctdb_logfile_log_add;
344 /* also catch stderr of subcommands to stdout */
347 printf("dup2 failed: %s\n", strerror(errno));
351 do_debug_v = ctdb_logfile_log;
352 do_debug_add_v = ctdb_logfile_log_add;
354 ctdb->log->fd = open(logfile, O_WRONLY|O_APPEND|O_CREAT, 0666);
355 if (ctdb->log->fd == -1) {
356 printf("Failed to open logfile %s\n", logfile);
364 /* Note that do_debug always uses the global log state. */
365 static void write_to_log(struct ctdb_log_state *log,
366 const char *buf, unsigned int len)
368 if (script_log_level <= LogLevel) {
369 do_debug("%*.*s\n", len, len, buf);
370 /* log it in the eventsystem as well */
372 log->logfn(log->buf, len, log->logfn_private);
377 called when log data comes in from a child process
379 static void ctdb_log_handler(struct event_context *ev, struct fd_event *fde,
380 uint16_t flags, void *private)
382 struct ctdb_log_state *log = talloc_get_type(private, struct ctdb_log_state);
386 if (!(flags & EVENT_FD_READ)) {
390 n = read(log->pfd, &log->buf[log->buf_used],
391 sizeof(log->buf) - log->buf_used);
395 if (log != log_state) {
401 this_log_level = script_log_level;
403 while (log->buf_used > 0 &&
404 (p = memchr(log->buf, '\n', log->buf_used)) != NULL) {
405 int n1 = (p - log->buf)+1;
407 /* swallow \r from child processes */
408 if (n2 > 0 && log->buf[n2-1] == '\r') {
411 write_to_log(log, log->buf, n2);
412 memmove(log->buf, p+1, sizeof(log->buf) - n1);
416 /* the buffer could have completely filled - unfortunately we have
417 no choice but to dump it out straight away */
418 if (log->buf_used == sizeof(log->buf)) {
419 write_to_log(log, log->buf, log->buf_used);
424 static int log_context_destructor(struct ctdb_log_state *log)
426 /* Flush buffer in case it wasn't \n-terminated. */
427 if (log->buf_used > 0) {
428 this_log_level = script_log_level;
429 write_to_log(log, log->buf, log->buf_used);
435 fork(), redirecting child output to logging and specified callback.
437 struct ctdb_log_state *ctdb_fork_with_logging(TALLOC_CTX *mem_ctx,
438 struct ctdb_context *ctdb,
439 void (*logfn)(const char *, uint16_t, void *),
440 void *logfn_private, pid_t *pid)
443 struct ctdb_log_state *log;
444 struct tevent_fd *fde;
446 log = talloc_zero(mem_ctx, struct ctdb_log_state);
447 CTDB_NO_MEMORY_NULL(ctdb, log);
450 log->logfn_private = (void *)logfn_private;
453 DEBUG(DEBUG_ERR,(__location__ " Failed to setup for child logging pipe\n"));
457 *pid = ctdb_fork(ctdb);
461 close(STDOUT_FILENO);
462 close(STDERR_FILENO);
463 dup2(p[1], STDOUT_FILENO);
464 dup2(p[1], STDERR_FILENO);
473 DEBUG(DEBUG_ERR, (__location__ " fork failed for child process\n"));
479 set_close_on_exec(log->pfd);
480 talloc_set_destructor(log, log_context_destructor);
481 fde = event_add_fd(ctdb->ev, log, log->pfd,
482 EVENT_FD_READ, ctdb_log_handler, log);
483 tevent_fd_set_auto_close(fde);
493 setup for logging of child process stdout
495 int ctdb_set_child_logging(struct ctdb_context *ctdb)
498 int old_stdout, old_stderr;
499 struct tevent_fd *fde;
501 if (ctdb->log->fd == STDOUT_FILENO) {
502 /* not needed for stdout logging */
506 /* setup a pipe to catch IO from subprocesses */
508 DEBUG(DEBUG_ERR,(__location__ " Failed to setup for child logging pipe\n"));
512 /* We'll fail if stderr/stdout not already open; it's simpler. */
513 old_stdout = dup(STDOUT_FILENO);
514 old_stderr = dup(STDERR_FILENO);
515 if (dup2(p[1], STDOUT_FILENO) < 0 || dup2(p[1], STDERR_FILENO) < 0) {
516 int saved_errno = errno;
517 dup2(old_stdout, STDOUT_FILENO);
518 dup2(old_stderr, STDERR_FILENO);
525 printf(__location__ " dup2 failed: %s\n",
533 /* Is this correct for STDOUT and STDERR ? */
534 set_close_on_exec(STDOUT_FILENO);
535 set_close_on_exec(STDERR_FILENO);
536 set_close_on_exec(p[0]);
538 fde = event_add_fd(ctdb->ev, ctdb->log, p[0],
539 EVENT_FD_READ, ctdb_log_handler, ctdb->log);
540 tevent_fd_set_auto_close(fde);
542 ctdb->log->pfd = p[0];
544 DEBUG(DEBUG_DEBUG, (__location__ " Created PIPE FD:%d for logging\n", p[0]));
551 * set up a log handler to catch logging from TEVENT
553 static void ctdb_tevent_logging(void *private_data,
554 enum tevent_debug_level level,
558 enum debug_level lvl = DEBUG_EMERG;
561 case TEVENT_DEBUG_FATAL:
564 case TEVENT_DEBUG_ERROR:
567 case TEVENT_DEBUG_WARNING:
570 case TEVENT_DEBUG_TRACE:
575 if (lvl <= LogLevel) {
576 this_log_level = lvl;
581 int ctdb_init_tevent_logging(struct ctdb_context *ctdb)
585 ret = tevent_set_debug(ctdb->ev,