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 = NO_VERBOSE;
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_basic_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_basic_init(&log_lock);
93 lock_basic_lock(&log_lock);
95 #if defined(HAVE_SYSLOG_H) || defined(UB_ON_WINDOWS)
99 lock_basic_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_basic_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 /* the facility is LOG_DAEMON by default, but
119 * --with-syslog-facility=LOCAL[0-7] can override it */
120 openlog(ident, LOG_NDELAY, UB_SYSLOG_FACILITY);
121 logging_to_syslog = 1;
122 lock_basic_unlock(&log_lock);
125 #elif defined(UB_ON_WINDOWS)
126 if(logging_to_syslog) {
127 logging_to_syslog = 0;
130 logging_to_syslog = 1;
131 lock_basic_unlock(&log_lock);
134 #endif /* HAVE_SYSLOG_H */
135 if(!filename || !filename[0]) {
137 lock_basic_unlock(&log_lock);
140 /* open the file for logging */
141 if(chrootdir && chrootdir[0] && strncmp(filename, chrootdir,
142 strlen(chrootdir)) == 0)
143 filename += strlen(chrootdir);
144 f = fopen(filename, "a");
146 lock_basic_unlock(&log_lock);
147 log_err("Could not open logfile %s: %s", filename,
151 #ifndef UB_ON_WINDOWS
152 /* line buffering does not work on windows */
153 setvbuf(f, NULL, (int)_IOLBF, 0);
156 lock_basic_unlock(&log_lock);
159 void log_file(FILE *f)
161 lock_basic_lock(&log_lock);
163 lock_basic_unlock(&log_lock);
166 void log_thread_set(int* num)
168 ub_thread_key_set(logkey, num);
171 int log_thread_get(void)
174 if(!key_created) return 0;
175 tid = (unsigned int*)ub_thread_key_get(logkey);
176 return (int)(tid?*tid:0);
179 void log_ident_set(const char* id)
184 void log_set_time_asc(int use_asc)
186 log_time_asc = use_asc;
189 void* log_get_lock(void)
193 #ifndef THREADS_DISABLED
194 return (void*)&log_lock;
201 log_vmsg(int pri, const char* type,
202 const char *format, va_list args)
204 char message[MAXSYSLOGMSGLEN];
205 unsigned int* tid = (unsigned int*)ub_thread_key_get(logkey);
207 #if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
210 #elif defined(UB_ON_WINDOWS)
211 char tmbuf[128], dtbuf[128];
214 vsnprintf(message, sizeof(message), format, args);
216 if(logging_to_syslog) {
217 syslog(pri, "[%d:%x] %s: %s",
218 (int)getpid(), tid?*tid:0, type, message);
221 #elif defined(UB_ON_WINDOWS)
222 if(logging_to_syslog) {
226 DWORD tp = MSG_GENERIC_ERR;
227 WORD wt = EVENTLOG_ERROR_TYPE;
228 if(strcmp(type, "info") == 0) {
230 wt=EVENTLOG_INFORMATION_TYPE;
231 } else if(strcmp(type, "warning") == 0) {
233 wt=EVENTLOG_WARNING_TYPE;
234 } else if(strcmp(type, "notice") == 0
235 || strcmp(type, "debug") == 0) {
236 tp=MSG_GENERIC_SUCCESS;
239 snprintf(m, sizeof(m), "[%s:%x] %s: %s",
240 ident, tid?*tid:0, type, message);
241 s = RegisterEventSource(NULL, SERVICE_NAME);
243 ReportEvent(s, wt, 0, tp, NULL, 1, 0, &str, NULL);
244 DeregisterEventSource(s);
247 #endif /* HAVE_SYSLOG_H */
248 lock_basic_lock(&log_lock);
250 lock_basic_unlock(&log_lock);
253 now = (time_t)time(NULL);
254 #if defined(HAVE_STRFTIME) && defined(HAVE_LOCALTIME_R)
255 if(log_time_asc && strftime(tmbuf, sizeof(tmbuf), "%b %d %H:%M:%S",
256 localtime_r(&now, &tm))%(sizeof(tmbuf)) != 0) {
257 /* %sizeof buf!=0 because old strftime returned max on error */
258 fprintf(logfile, "%s %s[%d:%x] %s: %s\n", tmbuf,
259 ident, (int)getpid(), tid?*tid:0, type, message);
261 #elif defined(UB_ON_WINDOWS)
262 if(log_time_asc && GetTimeFormat(LOCALE_USER_DEFAULT, 0, NULL, NULL,
263 tmbuf, sizeof(tmbuf)) && GetDateFormat(LOCALE_USER_DEFAULT, 0,
264 NULL, NULL, dtbuf, sizeof(dtbuf))) {
265 fprintf(logfile, "%s %s %s[%d:%x] %s: %s\n", dtbuf, tmbuf,
266 ident, (int)getpid(), tid?*tid:0, type, message);
269 fprintf(logfile, "[" ARG_LL "d] %s[%d:%x] %s: %s\n", (long long)now,
270 ident, (int)getpid(), tid?*tid:0, type, message);
272 /* line buffering does not work on windows */
275 lock_basic_unlock(&log_lock);
279 * implementation of log_info
280 * @param format: format string printf-style.
283 log_info(const char *format, ...)
286 va_start(args, format);
287 log_vmsg(LOG_INFO, "info", format, args);
292 * implementation of log_err
293 * @param format: format string printf-style.
296 log_err(const char *format, ...)
299 va_start(args, format);
300 log_vmsg(LOG_ERR, "error", format, args);
305 * implementation of log_warn
306 * @param format: format string printf-style.
309 log_warn(const char *format, ...)
312 va_start(args, format);
313 log_vmsg(LOG_WARNING, "warning", format, args);
318 * implementation of fatal_exit
319 * @param format: format string printf-style.
322 fatal_exit(const char *format, ...)
325 va_start(args, format);
326 log_vmsg(LOG_CRIT, "fatal error", format, args);
332 * implementation of verbose
333 * @param level: verbose level for the message.
334 * @param format: format string printf-style.
337 verbose(enum verbosity_value level, const char* format, ...)
340 va_start(args, format);
341 if(verbosity >= level) {
342 if(level == VERB_OPS)
343 log_vmsg(LOG_NOTICE, "notice", format, args);
344 else if(level == VERB_DETAIL)
345 log_vmsg(LOG_INFO, "info", format, args);
346 else log_vmsg(LOG_DEBUG, "debug", format, args);
353 log_hex_f(enum verbosity_value v, const char* msg, void* data, size_t length)
356 uint8_t* data8 = (uint8_t*)data;
357 const char* hexchar = "0123456789ABCDEF";
358 char buf[1024+1]; /* alloc blocksize hex chars + \0 */
359 const size_t blocksize = 512;
363 verbose(v, "%s[%u]", msg, (unsigned)length);
367 for(i=0; i<length; i+=blocksize/2) {
369 if(length - i < blocksize/2)
371 for(j=0; j<len; j++) {
372 buf[j*2] = hexchar[ data8[i+j] >> 4 ];
373 buf[j*2 + 1] = hexchar[ data8[i+j] & 0xF ];
376 verbose(v, "%s[%u:%u] %.*s", msg, (unsigned)length,
377 (unsigned)i, (int)len*2, buf);
382 log_hex(const char* msg, void* data, size_t length)
384 log_hex_f(verbosity, msg, data, length);
388 log_query(const char *format, ...)
391 va_start(args, format);
392 log_vmsg(LOG_INFO, "query", format, args);
397 log_reply(const char *format, ...)
400 va_start(args, format);
401 log_vmsg(LOG_INFO, "reply", format, args);
405 void log_buf(enum verbosity_value level, const char* msg, sldns_buffer* buf)
407 if(verbosity < level)
409 log_hex_f(level, msg, sldns_buffer_begin(buf), sldns_buffer_limit(buf));
413 char* wsa_strerror(DWORD err)
415 static char unknown[32];
418 case WSA_INVALID_HANDLE: return "Specified event object handle is invalid.";
419 case WSA_NOT_ENOUGH_MEMORY: return "Insufficient memory available.";
420 case WSA_INVALID_PARAMETER: return "One or more parameters are invalid.";
421 case WSA_OPERATION_ABORTED: return "Overlapped operation aborted.";
422 case WSA_IO_INCOMPLETE: return "Overlapped I/O event object not in signaled state.";
423 case WSA_IO_PENDING: return "Overlapped operations will complete later.";
424 case WSAEINTR: return "Interrupted function call.";
425 case WSAEBADF: return "File handle is not valid.";
426 case WSAEACCES: return "Permission denied.";
427 case WSAEFAULT: return "Bad address.";
428 case WSAEINVAL: return "Invalid argument.";
429 case WSAEMFILE: return "Too many open files.";
430 case WSAEWOULDBLOCK: return "Resource temporarily unavailable.";
431 case WSAEINPROGRESS: return "Operation now in progress.";
432 case WSAEALREADY: return "Operation already in progress.";
433 case WSAENOTSOCK: return "Socket operation on nonsocket.";
434 case WSAEDESTADDRREQ: return "Destination address required.";
435 case WSAEMSGSIZE: return "Message too long.";
436 case WSAEPROTOTYPE: return "Protocol wrong type for socket.";
437 case WSAENOPROTOOPT: return "Bad protocol option.";
438 case WSAEPROTONOSUPPORT: return "Protocol not supported.";
439 case WSAESOCKTNOSUPPORT: return "Socket type not supported.";
440 case WSAEOPNOTSUPP: return "Operation not supported.";
441 case WSAEPFNOSUPPORT: return "Protocol family not supported.";
442 case WSAEAFNOSUPPORT: return "Address family not supported by protocol family.";
443 case WSAEADDRINUSE: return "Address already in use.";
444 case WSAEADDRNOTAVAIL: return "Cannot assign requested address.";
445 case WSAENETDOWN: return "Network is down.";
446 case WSAENETUNREACH: return "Network is unreachable.";
447 case WSAENETRESET: return "Network dropped connection on reset.";
448 case WSAECONNABORTED: return "Software caused connection abort.";
449 case WSAECONNRESET: return "Connection reset by peer.";
450 case WSAENOBUFS: return "No buffer space available.";
451 case WSAEISCONN: return "Socket is already connected.";
452 case WSAENOTCONN: return "Socket is not connected.";
453 case WSAESHUTDOWN: return "Cannot send after socket shutdown.";
454 case WSAETOOMANYREFS: return "Too many references.";
455 case WSAETIMEDOUT: return "Connection timed out.";
456 case WSAECONNREFUSED: return "Connection refused.";
457 case WSAELOOP: return "Cannot translate name.";
458 case WSAENAMETOOLONG: return "Name too long.";
459 case WSAEHOSTDOWN: return "Host is down.";
460 case WSAEHOSTUNREACH: return "No route to host.";
461 case WSAENOTEMPTY: return "Directory not empty.";
462 case WSAEPROCLIM: return "Too many processes.";
463 case WSAEUSERS: return "User quota exceeded.";
464 case WSAEDQUOT: return "Disk quota exceeded.";
465 case WSAESTALE: return "Stale file handle reference.";
466 case WSAEREMOTE: return "Item is remote.";
467 case WSASYSNOTREADY: return "Network subsystem is unavailable.";
468 case WSAVERNOTSUPPORTED: return "Winsock.dll version out of range.";
469 case WSANOTINITIALISED: return "Successful WSAStartup not yet performed.";
470 case WSAEDISCON: return "Graceful shutdown in progress.";
471 case WSAENOMORE: return "No more results.";
472 case WSAECANCELLED: return "Call has been canceled.";
473 case WSAEINVALIDPROCTABLE: return "Procedure call table is invalid.";
474 case WSAEINVALIDPROVIDER: return "Service provider is invalid.";
475 case WSAEPROVIDERFAILEDINIT: return "Service provider failed to initialize.";
476 case WSASYSCALLFAILURE: return "System call failure.";
477 case WSASERVICE_NOT_FOUND: return "Service not found.";
478 case WSATYPE_NOT_FOUND: return "Class type not found.";
479 case WSA_E_NO_MORE: return "No more results.";
480 case WSA_E_CANCELLED: return "Call was canceled.";
481 case WSAEREFUSED: return "Database query was refused.";
482 case WSAHOST_NOT_FOUND: return "Host not found.";
483 case WSATRY_AGAIN: return "Nonauthoritative host not found.";
484 case WSANO_RECOVERY: return "This is a nonrecoverable error.";
485 case WSANO_DATA: return "Valid name, no data record of requested type.";
486 case WSA_QOS_RECEIVERS: return "QOS receivers.";
487 case WSA_QOS_SENDERS: return "QOS senders.";
488 case WSA_QOS_NO_SENDERS: return "No QOS senders.";
489 case WSA_QOS_NO_RECEIVERS: return "QOS no receivers.";
490 case WSA_QOS_REQUEST_CONFIRMED: return "QOS request confirmed.";
491 case WSA_QOS_ADMISSION_FAILURE: return "QOS admission error.";
492 case WSA_QOS_POLICY_FAILURE: return "QOS policy failure.";
493 case WSA_QOS_BAD_STYLE: return "QOS bad style.";
494 case WSA_QOS_BAD_OBJECT: return "QOS bad object.";
495 case WSA_QOS_TRAFFIC_CTRL_ERROR: return "QOS traffic control error.";
496 case WSA_QOS_GENERIC_ERROR: return "QOS generic error.";
497 case WSA_QOS_ESERVICETYPE: return "QOS service type error.";
498 case WSA_QOS_EFLOWSPEC: return "QOS flowspec error.";
499 case WSA_QOS_EPROVSPECBUF: return "Invalid QOS provider buffer.";
500 case WSA_QOS_EFILTERSTYLE: return "Invalid QOS filter style.";
501 case WSA_QOS_EFILTERTYPE: return "Invalid QOS filter type.";
502 case WSA_QOS_EFILTERCOUNT: return "Incorrect QOS filter count.";
503 case WSA_QOS_EOBJLENGTH: return "Invalid QOS object length.";
504 case WSA_QOS_EFLOWCOUNT: return "Incorrect QOS flow count.";
505 /*case WSA_QOS_EUNKOWNPSOBJ: return "Unrecognized QOS object.";*/
506 case WSA_QOS_EPOLICYOBJ: return "Invalid QOS policy object.";
507 case WSA_QOS_EFLOWDESC: return "Invalid QOS flow descriptor.";
508 case WSA_QOS_EPSFLOWSPEC: return "Invalid QOS provider-specific flowspec.";
509 case WSA_QOS_EPSFILTERSPEC: return "Invalid QOS provider-specific filterspec.";
510 case WSA_QOS_ESDMODEOBJ: return "Invalid QOS shape discard mode object.";
511 case WSA_QOS_ESHAPERATEOBJ: return "Invalid QOS shaping rate object.";
512 case WSA_QOS_RESERVED_PETYPE: return "Reserved policy QOS element type.";
514 snprintf(unknown, sizeof(unknown),
515 "unknown WSA error code %d", (int)err);
519 #endif /* USE_WINSOCK */