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/events/events.h"
22 #include "../include/ctdb.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;
89 state = talloc(ctdb, struct ctdb_syslog_state);
90 CTDB_NO_MEMORY(ctdb, state);
92 if (pipe(state->fd) != 0) {
93 printf("Failed to create syslog pipe\n");
98 ctdb->syslogd_pid = fork();
99 if (ctdb->syslogd_pid == (pid_t)-1) {
100 printf("Failed to create syslog child process\n");
107 syslogd_is_started = 1;
109 if (ctdb->syslogd_pid != 0) {
110 DEBUG(DEBUG_ERR,("Starting SYSLOG child process with pid:%d\n", (int)ctdb->syslogd_pid));
113 set_close_on_exec(state->fd[0]);
118 talloc_free(ctdb->ev);
119 ctdb->ev = event_context_init(NULL);
121 syslog(LOG_ERR, "Starting SYSLOG daemon with pid:%d", (int)getpid());
124 event_add_fd(ctdb->ev, state, state->fd[1], EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
125 ctdb_syslog_terminate_handler, state);
127 state->syslog_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
128 if (state->syslog_fd == -1) {
129 printf("Failed to create syslog socket\n");
133 syslog_sin.sin_family = AF_INET;
134 syslog_sin.sin_port = htons(CTDB_PORT);
135 syslog_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
137 if (bind(state->syslog_fd, &syslog_sin, sizeof(syslog_sin)) == -1) {
138 if (errno == EADDRINUSE) {
139 /* this is ok, we already have a syslog daemon */
142 printf("syslog daemon failed to bind to socket. errno:%d(%s)\n", errno, strerror(errno));
147 event_add_fd(ctdb->ev, state, state->syslog_fd, EVENT_FD_READ|EVENT_FD_AUTOCLOSE,
148 ctdb_syslog_handler, state);
150 event_loop_wait(ctdb->ev);
152 /* this should not happen */
156 struct ctdb_log_state {
157 struct ctdb_context *ctdb;
162 void (*logfn)(const char *, uint16_t, void *);
166 /* we need this global to keep the DEBUG() syntax */
167 static struct ctdb_log_state *log_state;
170 syslog logging function
172 static void ctdb_syslog_log(const char *format, va_list ap)
174 struct syslog_message *msg;
175 int level = LOG_DEBUG;
179 struct sockaddr_in syslog_sin;
181 ret = vasprintf(&s, format, ap);
186 switch (this_log_level) {
213 len = offsetof(struct syslog_message, message) + strlen(s) + 1;
220 msg->len = strlen(s);
221 strcpy(msg->message, s);
223 if (syslogd_is_started == 0) {
224 syslog(msg->level, "%s", msg->message);
226 syslog_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
227 if (syslog_fd == -1) {
228 printf("Failed to create syslog socket\n");
234 syslog_sin.sin_family = AF_INET;
235 syslog_sin.sin_port = htons(CTDB_PORT);
236 syslog_sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
239 ret = sendto(syslog_fd, msg, len, 0, &syslog_sin, sizeof(syslog_sin));
240 /* no point in checking here since we cant log an error */
251 log file logging function
253 static void ctdb_logfile_log(const char *format, va_list ap)
262 ret = vasprintf(&s, format, ap);
264 const char *errstr = "vasprintf failed\n";
266 write(log_state->fd, errstr, strlen(errstr));
270 t = timeval_current();
271 tm = localtime(&t.tv_sec);
273 strftime(tbuf,sizeof(tbuf)-1,"%Y/%m/%d %H:%M:%S", tm);
275 ret = asprintf(&s2, "%s.%06u [%5u]: %s",
276 tbuf, (unsigned)t.tv_usec, (unsigned)getpid(), s);
279 const char *errstr = "asprintf failed\n";
280 write(log_state->fd, errstr, strlen(errstr));
284 write(log_state->fd, s2, strlen(s2));
289 static void ctdb_logfile_log_add(const char *format, va_list ap)
294 ret = vasprintf(&s, format, ap);
296 const char *errstr = "vasprintf failed\n";
298 write(log_state->fd, errstr, strlen(errstr));
303 write(log_state->fd, s, strlen(s));
311 choose the logfile location
313 int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile, bool use_syslog)
317 ctdb->log = talloc_zero(ctdb, struct ctdb_log_state);
318 if (ctdb->log == NULL) {
319 printf("talloc_zero failed\n");
323 ctdb->log->ctdb = ctdb;
324 log_state = ctdb->log;
327 do_debug_v = ctdb_syslog_log;
328 do_debug_add_v = ctdb_syslog_log;
329 ctdb->log->use_syslog = true;
330 } else if (logfile == NULL || strcmp(logfile, "-") == 0) {
331 do_debug_v = ctdb_logfile_log;
332 do_debug_add_v = ctdb_logfile_log_add;
334 /* also catch stderr of subcommands to stdout */
337 printf("dup2 failed: %s\n", strerror(errno));
341 do_debug_v = ctdb_logfile_log;
342 do_debug_add_v = ctdb_logfile_log_add;
344 ctdb->log->fd = open(logfile, O_WRONLY|O_APPEND|O_CREAT, 0666);
345 if (ctdb->log->fd == -1) {
346 printf("Failed to open logfile %s\n", logfile);
354 /* Note that do_debug always uses the global log state. */
355 static void write_to_log(struct ctdb_log_state *log,
356 const char *buf, unsigned int len)
358 if (script_log_level <= LogLevel) {
359 do_debug("%*.*s\n", len, len, buf);
360 /* log it in the eventsystem as well */
362 log->logfn(log->buf, len, log->logfn_private);
367 called when log data comes in from a child process
369 static void ctdb_log_handler(struct event_context *ev, struct fd_event *fde,
370 uint16_t flags, void *private)
372 struct ctdb_log_state *log = talloc_get_type(private, struct ctdb_log_state);
376 if (!(flags & EVENT_FD_READ)) {
380 n = read(log->pfd, &log->buf[log->buf_used],
381 sizeof(log->buf) - log->buf_used);
389 this_log_level = script_log_level;
391 while (log->buf_used > 0 &&
392 (p = memchr(log->buf, '\n', log->buf_used)) != NULL) {
393 int n1 = (p - log->buf)+1;
395 /* swallow \r from child processes */
396 if (n2 > 0 && log->buf[n2-1] == '\r') {
399 write_to_log(log, log->buf, n2);
400 memmove(log->buf, p+1, sizeof(log->buf) - n1);
404 /* the buffer could have completely filled - unfortunately we have
405 no choice but to dump it out straight away */
406 if (log->buf_used == sizeof(log->buf)) {
407 write_to_log(log, log->buf, log->buf_used);
412 static int log_context_destructor(struct ctdb_log_state *log)
414 /* Flush buffer in case it wasn't \n-terminated. */
415 if (log->buf_used > 0) {
416 this_log_level = script_log_level;
417 write_to_log(log, log->buf, log->buf_used);
423 fork(), redirecting child output to logging and specified callback.
425 struct ctdb_log_state *ctdb_fork_with_logging(TALLOC_CTX *mem_ctx,
426 struct ctdb_context *ctdb,
427 void (*logfn)(const char *, uint16_t, void *),
428 void *logfn_private, pid_t *pid)
431 int old_stdout, old_stderr;
433 struct ctdb_log_state *log;
435 log = talloc_zero(mem_ctx, struct ctdb_log_state);
436 CTDB_NO_MEMORY_NULL(ctdb, log);
439 log->logfn_private = (void *)logfn_private;
442 DEBUG(DEBUG_ERR,(__location__ " Failed to setup for child logging pipe\n"));
446 /* We'll fail if stderr/stdout not already open; it's simpler. */
447 old_stdout = dup(STDOUT_FILENO);
448 old_stderr = dup(STDERR_FILENO);
449 if (dup2(p[1], STDOUT_FILENO) < 0 || dup2(p[1], STDERR_FILENO) < 0) {
450 DEBUG(DEBUG_ERR,(__location__ " Failed to setup output for child\n"));
466 dup2(STDOUT_FILENO, old_stdout);
467 dup2(STDERR_FILENO, old_stderr);
473 DEBUG(DEBUG_ERR, (__location__ " fork failed for child process\n"));
480 talloc_set_destructor(log, log_context_destructor);
481 event_add_fd(ctdb->ev, log, log->pfd, EVENT_FD_READ,
482 ctdb_log_handler, log);
494 setup for logging of child process stdout
496 int ctdb_set_child_logging(struct ctdb_context *ctdb)
501 if (ctdb->log->fd == 1) {
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 event_add_fd(ctdb->ev, ctdb->log, p[0], EVENT_FD_READ,
513 ctdb_log_handler, ctdb->log);
514 set_close_on_exec(p[0]);
515 ctdb->log->pfd = p[0];
517 DEBUG(DEBUG_NOTICE, (__location__ " Created PIPE FD:%d for logging\n", p[0]));
524 printf("dup2 failed: %s\n", strerror(errno));
529 /* also catch stderr of subcommands to the log */
532 printf("dup2 failed: %s\n", strerror(errno));