2 * util/log.c - implementation of the log code
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
6 * This software is open source.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * Implementation of log.h.
42 #include "util/locks.h"
43 #include "sldns/sbuffer.h"
51 /**define LOG_ constants */
54 # define LOG_WARNING 4
60 # include "winrc/win_svc.h"
63 /* default verbosity */
64 enum verbosity_value verbosity = 0;
65 /** the file logged to. */
66 static FILE* logfile = 0;
67 /** if key has been created */
68 static int key_created = 0;
69 /** pthread key for thread ids in logfile */
70 static ub_thread_key_type logkey;
71 #ifndef THREADS_DISABLED
72 /** pthread mutex to protect FILE* */
73 static lock_quick_type log_lock;
75 /** the identity of this executable/process */
76 static const char* ident="unbound";
77 #if defined(HAVE_SYSLOG_H) || defined(UB_ON_WINDOWS)
78 /** are we using syslog(3) to log to */
79 static int logging_to_syslog = 0;
80 #endif /* HAVE_SYSLOG_H */
81 /** print time in UTC or in secondsfrom1970 */
82 static int log_time_asc = 0;
85 log_init(const char* filename, int use_syslog, const char* chrootdir)
90 ub_thread_key_create(&logkey, NULL);
91 lock_quick_init(&log_lock);
93 lock_quick_lock(&log_lock);
95 #if defined(HAVE_SYSLOG_H) || defined(UB_ON_WINDOWS)
99 lock_quick_unlock(&log_lock); /* verbose() needs the lock */
100 verbose(VERB_QUERY, "switching log to %s",
101 use_syslog?"syslog":(filename&&filename[0]?filename:"stderr"));
102 lock_quick_lock(&log_lock);
104 if(logfile && logfile != stderr) {
106 logfile = NULL; /* set to NULL before it is closed, so that
107 other threads have a valid logfile or NULL */
111 if(logging_to_syslog) {
113 logging_to_syslog = 0;
116 /* do not delay opening until first write, because we may
117 * chroot and no longer be able to access dev/log and so on */
118 openlog(ident, LOG_NDELAY, LOG_DAEMON);
119 logging_to_syslog = 1;
120 lock_quick_unlock(&log_lock);
123 #elif defined(UB_ON_WINDOWS)
124 if(logging_to_syslog) {
125 logging_to_syslog = 0;
128 logging_to_syslog = 1;
129 lock_quick_unlock(&log_lock);
132 #endif /* HAVE_SYSLOG_H */
133 if(!filename || !filename[0]) {
135 lock_quick_unlock(&log_lock);
138 /* open the file for logging */
139 if(chrootdir && chrootdir[0] && strncmp(filename, chrootdir,
140 strlen(chrootdir)) == 0)
141 filename += strlen(chrootdir);
142 f = fopen(filename, "a");
144 lock_quick_unlock(&log_lock);
145 log_err("Could not open logfile %s: %s", filename,
149 #ifndef UB_ON_WINDOWS
150 /* line buffering does not work on windows */
151 setvbuf(f, NULL, (int)_IOLBF, 0);
154 lock_quick_unlock(&log_lock);
157 void log_file(FILE *f)
159 lock_quick_lock(&log_lock);
161 lock_quick_unlock(&log_lock);
164 void log_thread_set(int* num)
166 ub_thread_key_set(logkey, num);
169 int log_thread_get(void)
172 if(!key_created) return 0;
173 tid = (unsigned int*)ub_thread_key_get(logkey);
174 return (int)(tid?*tid:0);
177 void log_ident_set(const char* id)
182 void log_set_time_asc(int use_asc)
184 log_time_asc = use_asc;
187 void* log_get_lock(void)
191 #ifndef THREADS_DISABLED
192 return (void*)&log_lock;
199 log_vmsg(int pri, const char* type,
200 const char *format, va_list args)
202 char message[MAXSYSLOGMSGLEN];
203 unsigned int* tid = (unsigned int*)ub_thread_key_get(logkey);
205 #if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
208 #elif defined(UB_ON_WINDOWS)
209 char tmbuf[128], dtbuf[128];
212 vsnprintf(message, sizeof(message), format, args);
214 if(logging_to_syslog) {
215 syslog(pri, "[%d:%x] %s: %s",
216 (int)getpid(), tid?*tid:0, type, message);
219 #elif defined(UB_ON_WINDOWS)
220 if(logging_to_syslog) {
224 DWORD tp = MSG_GENERIC_ERR;
225 WORD wt = EVENTLOG_ERROR_TYPE;
226 if(strcmp(type, "info") == 0) {
228 wt=EVENTLOG_INFORMATION_TYPE;
229 } else if(strcmp(type, "warning") == 0) {
231 wt=EVENTLOG_WARNING_TYPE;
232 } else if(strcmp(type, "notice") == 0
233 || strcmp(type, "debug") == 0) {
234 tp=MSG_GENERIC_SUCCESS;
237 snprintf(m, sizeof(m), "[%s:%x] %s: %s",
238 ident, tid?*tid:0, type, message);
239 s = RegisterEventSource(NULL, SERVICE_NAME);
241 ReportEvent(s, wt, 0, tp, NULL, 1, 0, &str, NULL);
242 DeregisterEventSource(s);
245 #endif /* HAVE_SYSLOG_H */
246 lock_quick_lock(&log_lock);
248 lock_quick_unlock(&log_lock);
251 now = (time_t)time(NULL);
252 #if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
253 if(log_time_asc && strftime(tmbuf, sizeof(tmbuf), "%b %d %H:%M:%S",
254 localtime_r(&now, &tm))%(sizeof(tmbuf)) != 0) {
255 /* %sizeof buf!=0 because old strftime returned max on error */
256 fprintf(logfile, "%s %s[%d:%x] %s: %s\n", tmbuf,
257 ident, (int)getpid(), tid?*tid:0, type, message);
259 #elif defined(UB_ON_WINDOWS)
260 if(log_time_asc && GetTimeFormat(LOCALE_USER_DEFAULT, 0, NULL, NULL,
261 tmbuf, sizeof(tmbuf)) && GetDateFormat(LOCALE_USER_DEFAULT, 0,
262 NULL, NULL, dtbuf, sizeof(dtbuf))) {
263 fprintf(logfile, "%s %s %s[%d:%x] %s: %s\n", dtbuf, tmbuf,
264 ident, (int)getpid(), tid?*tid:0, type, message);
267 fprintf(logfile, "[" ARG_LL "d] %s[%d:%x] %s: %s\n", (long long)now,
268 ident, (int)getpid(), tid?*tid:0, type, message);
270 /* line buffering does not work on windows */
273 lock_quick_unlock(&log_lock);
277 * implementation of log_info
278 * @param format: format string printf-style.
281 log_info(const char *format, ...)
284 va_start(args, format);
285 log_vmsg(LOG_INFO, "info", format, args);
290 * implementation of log_err
291 * @param format: format string printf-style.
294 log_err(const char *format, ...)
297 va_start(args, format);
298 log_vmsg(LOG_ERR, "error", format, args);
303 * implementation of log_warn
304 * @param format: format string printf-style.
307 log_warn(const char *format, ...)
310 va_start(args, format);
311 log_vmsg(LOG_WARNING, "warning", format, args);
316 * implementation of fatal_exit
317 * @param format: format string printf-style.
320 fatal_exit(const char *format, ...)
323 va_start(args, format);
324 log_vmsg(LOG_CRIT, "fatal error", format, args);
330 * implementation of verbose
331 * @param level: verbose level for the message.
332 * @param format: format string printf-style.
335 verbose(enum verbosity_value level, const char* format, ...)
338 va_start(args, format);
339 if(verbosity >= level) {
340 if(level == VERB_OPS)
341 log_vmsg(LOG_NOTICE, "notice", format, args);
342 else if(level == VERB_DETAIL)
343 log_vmsg(LOG_INFO, "info", format, args);
344 else log_vmsg(LOG_DEBUG, "debug", format, args);
351 log_hex_f(enum verbosity_value v, const char* msg, void* data, size_t length)
354 uint8_t* data8 = (uint8_t*)data;
355 const char* hexchar = "0123456789ABCDEF";
356 char buf[1024+1]; /* alloc blocksize hex chars + \0 */
357 const size_t blocksize = 512;
361 verbose(v, "%s[%u]", msg, (unsigned)length);
365 for(i=0; i<length; i+=blocksize/2) {
367 if(length - i < blocksize/2)
369 for(j=0; j<len; j++) {
370 buf[j*2] = hexchar[ data8[i+j] >> 4 ];
371 buf[j*2 + 1] = hexchar[ data8[i+j] & 0xF ];
374 verbose(v, "%s[%u:%u] %.*s", msg, (unsigned)length,
375 (unsigned)i, (int)len*2, buf);
380 log_hex(const char* msg, void* data, size_t length)
382 log_hex_f(verbosity, msg, data, length);
386 log_query(const char *format, ...)
389 va_start(args, format);
390 log_vmsg(LOG_INFO, "query", format, args);
395 log_reply(const char *format, ...)
398 va_start(args, format);
399 log_vmsg(LOG_INFO, "reply", format, args);
403 void log_buf(enum verbosity_value level, const char* msg, sldns_buffer* buf)
405 if(verbosity < level)
407 log_hex_f(level, msg, sldns_buffer_begin(buf), sldns_buffer_limit(buf));
411 char* wsa_strerror(DWORD err)
413 static char unknown[32];
416 case WSA_INVALID_HANDLE: return "Specified event object handle is invalid.";
417 case WSA_NOT_ENOUGH_MEMORY: return "Insufficient memory available.";
418 case WSA_INVALID_PARAMETER: return "One or more parameters are invalid.";
419 case WSA_OPERATION_ABORTED: return "Overlapped operation aborted.";
420 case WSA_IO_INCOMPLETE: return "Overlapped I/O event object not in signaled state.";
421 case WSA_IO_PENDING: return "Overlapped operations will complete later.";
422 case WSAEINTR: return "Interrupted function call.";
423 case WSAEBADF: return "File handle is not valid.";
424 case WSAEACCES: return "Permission denied.";
425 case WSAEFAULT: return "Bad address.";
426 case WSAEINVAL: return "Invalid argument.";
427 case WSAEMFILE: return "Too many open files.";
428 case WSAEWOULDBLOCK: return "Resource temporarily unavailable.";
429 case WSAEINPROGRESS: return "Operation now in progress.";
430 case WSAEALREADY: return "Operation already in progress.";
431 case WSAENOTSOCK: return "Socket operation on nonsocket.";
432 case WSAEDESTADDRREQ: return "Destination address required.";
433 case WSAEMSGSIZE: return "Message too long.";
434 case WSAEPROTOTYPE: return "Protocol wrong type for socket.";
435 case WSAENOPROTOOPT: return "Bad protocol option.";
436 case WSAEPROTONOSUPPORT: return "Protocol not supported.";
437 case WSAESOCKTNOSUPPORT: return "Socket type not supported.";
438 case WSAEOPNOTSUPP: return "Operation not supported.";
439 case WSAEPFNOSUPPORT: return "Protocol family not supported.";
440 case WSAEAFNOSUPPORT: return "Address family not supported by protocol family.";
441 case WSAEADDRINUSE: return "Address already in use.";
442 case WSAEADDRNOTAVAIL: return "Cannot assign requested address.";
443 case WSAENETDOWN: return "Network is down.";
444 case WSAENETUNREACH: return "Network is unreachable.";
445 case WSAENETRESET: return "Network dropped connection on reset.";
446 case WSAECONNABORTED: return "Software caused connection abort.";
447 case WSAECONNRESET: return "Connection reset by peer.";
448 case WSAENOBUFS: return "No buffer space available.";
449 case WSAEISCONN: return "Socket is already connected.";
450 case WSAENOTCONN: return "Socket is not connected.";
451 case WSAESHUTDOWN: return "Cannot send after socket shutdown.";
452 case WSAETOOMANYREFS: return "Too many references.";
453 case WSAETIMEDOUT: return "Connection timed out.";
454 case WSAECONNREFUSED: return "Connection refused.";
455 case WSAELOOP: return "Cannot translate name.";
456 case WSAENAMETOOLONG: return "Name too long.";
457 case WSAEHOSTDOWN: return "Host is down.";
458 case WSAEHOSTUNREACH: return "No route to host.";
459 case WSAENOTEMPTY: return "Directory not empty.";
460 case WSAEPROCLIM: return "Too many processes.";
461 case WSAEUSERS: return "User quota exceeded.";
462 case WSAEDQUOT: return "Disk quota exceeded.";
463 case WSAESTALE: return "Stale file handle reference.";
464 case WSAEREMOTE: return "Item is remote.";
465 case WSASYSNOTREADY: return "Network subsystem is unavailable.";
466 case WSAVERNOTSUPPORTED: return "Winsock.dll version out of range.";
467 case WSANOTINITIALISED: return "Successful WSAStartup not yet performed.";
468 case WSAEDISCON: return "Graceful shutdown in progress.";
469 case WSAENOMORE: return "No more results.";
470 case WSAECANCELLED: return "Call has been canceled.";
471 case WSAEINVALIDPROCTABLE: return "Procedure call table is invalid.";
472 case WSAEINVALIDPROVIDER: return "Service provider is invalid.";
473 case WSAEPROVIDERFAILEDINIT: return "Service provider failed to initialize.";
474 case WSASYSCALLFAILURE: return "System call failure.";
475 case WSASERVICE_NOT_FOUND: return "Service not found.";
476 case WSATYPE_NOT_FOUND: return "Class type not found.";
477 case WSA_E_NO_MORE: return "No more results.";
478 case WSA_E_CANCELLED: return "Call was canceled.";
479 case WSAEREFUSED: return "Database query was refused.";
480 case WSAHOST_NOT_FOUND: return "Host not found.";
481 case WSATRY_AGAIN: return "Nonauthoritative host not found.";
482 case WSANO_RECOVERY: return "This is a nonrecoverable error.";
483 case WSANO_DATA: return "Valid name, no data record of requested type.";
484 case WSA_QOS_RECEIVERS: return "QOS receivers.";
485 case WSA_QOS_SENDERS: return "QOS senders.";
486 case WSA_QOS_NO_SENDERS: return "No QOS senders.";
487 case WSA_QOS_NO_RECEIVERS: return "QOS no receivers.";
488 case WSA_QOS_REQUEST_CONFIRMED: return "QOS request confirmed.";
489 case WSA_QOS_ADMISSION_FAILURE: return "QOS admission error.";
490 case WSA_QOS_POLICY_FAILURE: return "QOS policy failure.";
491 case WSA_QOS_BAD_STYLE: return "QOS bad style.";
492 case WSA_QOS_BAD_OBJECT: return "QOS bad object.";
493 case WSA_QOS_TRAFFIC_CTRL_ERROR: return "QOS traffic control error.";
494 case WSA_QOS_GENERIC_ERROR: return "QOS generic error.";
495 case WSA_QOS_ESERVICETYPE: return "QOS service type error.";
496 case WSA_QOS_EFLOWSPEC: return "QOS flowspec error.";
497 case WSA_QOS_EPROVSPECBUF: return "Invalid QOS provider buffer.";
498 case WSA_QOS_EFILTERSTYLE: return "Invalid QOS filter style.";
499 case WSA_QOS_EFILTERTYPE: return "Invalid QOS filter type.";
500 case WSA_QOS_EFILTERCOUNT: return "Incorrect QOS filter count.";
501 case WSA_QOS_EOBJLENGTH: return "Invalid QOS object length.";
502 case WSA_QOS_EFLOWCOUNT: return "Incorrect QOS flow count.";
503 /*case WSA_QOS_EUNKOWNPSOBJ: return "Unrecognized QOS object.";*/
504 case WSA_QOS_EPOLICYOBJ: return "Invalid QOS policy object.";
505 case WSA_QOS_EFLOWDESC: return "Invalid QOS flow descriptor.";
506 case WSA_QOS_EPSFLOWSPEC: return "Invalid QOS provider-specific flowspec.";
507 case WSA_QOS_EPSFILTERSPEC: return "Invalid QOS provider-specific filterspec.";
508 case WSA_QOS_ESDMODEOBJ: return "Invalid QOS shape discard mode object.";
509 case WSA_QOS_ESHAPERATEOBJ: return "Invalid QOS shaping rate object.";
510 case WSA_QOS_RESERVED_PETYPE: return "Reserved policy QOS element type.";
512 snprintf(unknown, sizeof(unknown),
513 "unknown WSA error code %d", (int)err);
517 #endif /* USE_WINSOCK */