1 const char errlog_rcs[] = "$Id: errlog.c,v 1.78 2008/09/07 16:59:31 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/errlog.c,v $
6 * Purpose : Log errors to a designated destination in an elegant,
9 * Copyright : Written by and Copyright (C) 2001-2007 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.78 2008/09/07 16:59:31 fabiankeil
37 * Update a comment to reflect that we
38 * have mutex support on mingw32 now.
40 * Revision 1.77 2008/09/07 12:43:44 fabiankeil
41 * Move the LogPutString() call in log_error() into the locked
42 * region so the Windows GUI log is consistent with the logfile.
44 * Revision 1.76 2008/09/07 12:35:05 fabiankeil
45 * Add mutex lock support for _WIN32.
47 * Revision 1.75 2008/09/04 08:13:58 fabiankeil
48 * Prepare for critical sections on Windows by adding a
49 * layer of indirection before the pthread mutex functions.
51 * Revision 1.74 2008/08/06 18:33:36 fabiankeil
52 * If the "close fd first" workaround doesn't work,
53 * the fatal error message will be lost, so we better
54 * explain the consequences while we still can.
56 * Revision 1.73 2008/08/04 19:06:55 fabiankeil
57 * Add a lame workaround for the "can't open an already open
58 * logfile on OS/2" problem reported by Maynard in #2028842
59 * and describe what a real solution would look like.
61 * Revision 1.72 2008/07/27 12:04:28 fabiankeil
64 * Revision 1.71 2008/06/28 17:17:15 fabiankeil
65 * Remove another stray semicolon.
67 * Revision 1.70 2008/06/28 17:10:29 fabiankeil
68 * Remove stray semicolon in get_log_timestamp().
69 * Reported by Jochen Voss in #2005221.
71 * Revision 1.69 2008/05/30 15:55:25 fabiankeil
72 * Declare variable "debug" static and complain about its name.
74 * Revision 1.68 2008/04/27 16:50:46 fabiankeil
75 * Remove an incorrect assertion. The value of debug may change if
76 * the configuration is reloaded in another thread. While we could
77 * cache the initial value, the assertion doesn't seem worth it.
79 * Revision 1.67 2008/03/27 18:27:23 fabiankeil
80 * Remove kill-popups action.
82 * Revision 1.66 2008/01/31 15:38:14 fabiankeil
83 * - Make the logfp assertion more strict. As of 1.63, the "||" could
84 * have been an "&&", which means we can use two separate assertions
85 * and skip on of them on Windows.
86 * - Break a long commit message line in two.
88 * Revision 1.65 2008/01/31 14:44:33 fabiankeil
89 * Use (a != b) instead of !(a == b) so the sanity check looks less insane.
91 * Revision 1.64 2008/01/21 18:56:46 david__schmidt
92 * Swap #def from negative to positive, re-joined it so it didn't
93 * span an assertion (compilation failure on OS/2)
95 * Revision 1.63 2007/12/15 19:49:32 fabiankeil
96 * Stop overloading logfile to control the mingw32 log window as well.
97 * It's no longer necessary now that we disable all debug lines by default
98 * and at least one user perceived it as a regression (added in 1.55).
100 * Revision 1.62 2007/11/30 15:33:46 fabiankeil
101 * Unbreak LOG_LEVEL_FATAL. It wasn't fatal with logging disabled
102 * and on mingw32 fatal log messages didn't end up in the log file.
104 * Revision 1.61 2007/11/04 19:03:01 fabiankeil
105 * Fix another deadlock Hal spotted and that mysteriously didn't affect FreeBSD.
107 * Revision 1.60 2007/11/03 19:03:31 fabiankeil
108 * - Prevent the Windows GUI from showing the version two times in a row.
109 * - Stop using the imperative in the "(Re-)Open logfile" message.
110 * - Ditch the "Switching to daemon mode" message as the detection
111 * whether or not we're already in daemon mode doesn't actually work.
113 * Revision 1.59 2007/11/01 12:50:56 fabiankeil
114 * Here's looking at you, deadlock.
116 * Revision 1.58 2007/10/28 19:04:21 fabiankeil
117 * Don't mention daemon mode in "Logging disabled" message. Some
118 * platforms call it differently and it's not really relevant anyway.
120 * Revision 1.57 2007/10/27 13:02:26 fabiankeil
121 * Relocate daemon-mode-related log messages to make sure
122 * they aren't shown again in case of configuration reloads.
124 * Revision 1.56 2007/10/14 14:26:56 fabiankeil
125 * Remove the old log_error() version.
127 * Revision 1.55 2007/10/14 14:12:41 fabiankeil
128 * When in daemon mode, close stderr after the configuration file has been
129 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
131 * Revision 1.54 2007/09/22 16:15:34 fabiankeil
132 * - Let it compile with pcc.
133 * - Move our includes below system includes to prevent macro conflicts.
135 * Revision 1.53 2007/08/05 13:53:14 fabiankeil
136 * #1763173 from Stefan Huehner: declare some more functions
137 * static and use void instead of empty parameter lists.
139 * Revision 1.52 2007/07/14 07:28:47 fabiankeil
140 * Add translation function for JB_ERR_FOO codes.
142 * Revision 1.51 2007/05/11 11:51:34 fabiankeil
143 * Fix a type mismatch warning.
145 * Revision 1.50 2007/04/11 10:55:44 fabiankeil
146 * Enforce some assertions that could be triggered
147 * on mingw32 and other systems where we use threads
150 * Revision 1.49 2007/04/08 16:44:15 fabiankeil
151 * We need <sys/time.h> for gettimeofday(), not <time.h>.
153 * Revision 1.48 2007/03/31 13:33:28 fabiankeil
154 * Add alternative log_error() with timestamps
155 * that contain milliseconds and without using
156 * strcpy(), strcat() or sprintf().
158 * Revision 1.47 2006/11/28 15:25:15 fabiankeil
159 * Only unlink the pidfile if it's actually used.
161 * Revision 1.46 2006/11/13 19:05:51 fabiankeil
162 * Make pthread mutex locking more generic. Instead of
163 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
164 * and use mutex locking unless there is an _r function
165 * available. Better safe than sorry.
167 * Fixes "./configure --disable-pthread" and should result
168 * in less threading-related problems on pthread-using platforms,
169 * but it still doesn't fix BR#1122404.
171 * Revision 1.45 2006/08/21 11:15:54 david__schmidt
172 * MS Visual C++ build updates
174 * Revision 1.44 2006/08/18 16:03:16 david__schmidt
175 * Tweak for OS/2 build happiness.
177 * Revision 1.43 2006/08/03 02:46:41 david__schmidt
178 * Incorporate Fabian Keil's patch work:
179 * http://www.fabiankeil.de/sourcecode/privoxy/
181 * Revision 1.42 2006/07/18 14:48:46 david__schmidt
182 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
183 * with what was really the latest development (the v_3_0_branch branch)
185 * Revision 1.40.2.4 2005/04/03 20:10:50 david__schmidt
186 * Thanks to Jindrich Makovicka for a race condition fix for the log
187 * file. The race condition remains for non-pthread implementations.
188 * Reference patch #1175720.
190 * Revision 1.40.2.3 2003/03/07 03:41:04 david__schmidt
191 * Wrapping all *_r functions (the non-_r versions of them) with mutex
192 * semaphores for OSX. Hopefully this will take care of all of those pesky
195 * Revision 1.40.2.2 2002/09/28 00:30:57 david__schmidt
196 * Update error logging to give sane values for thread IDs on Mach kernels.
197 * It's still a hack, but at least it looks farily normal. We print the
198 * absolute value of the first 4 bytes of the pthread_t modded with 1000.
200 * Revision 1.40.2.1 2002/09/25 12:47:42 oes
201 * Make log_error safe against NULL string arguments
203 * Revision 1.40 2002/05/22 01:27:27 david__schmidt
205 * Add os2_socket_strerr mirroring w32_socket_strerr.
207 * Revision 1.39 2002/04/03 17:15:27 gliptak
208 * zero padding thread ids in log
210 * Revision 1.38 2002/03/31 17:18:59 jongfoster
211 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
213 * Revision 1.37 2002/03/27 14:32:43 david__schmidt
214 * More compiler warning message maintenance
216 * Revision 1.36 2002/03/26 22:29:54 swa
217 * we have a new homepage!
219 * Revision 1.35 2002/03/24 15:23:33 jongfoster
222 * Revision 1.34 2002/03/24 13:25:43 swa
223 * name change related issues
225 * Revision 1.33 2002/03/13 00:27:04 jongfoster
228 * Revision 1.32 2002/03/07 03:46:17 oes
229 * Fixed compiler warnings
231 * Revision 1.31 2002/03/06 23:02:57 jongfoster
234 * Revision 1.30 2002/03/05 22:43:45 david__schmidt
235 * - Better error reporting on OS/2
236 * - Fix double-slash comment (oops)
238 * Revision 1.29 2002/03/04 23:45:13 jongfoster
239 * Printing thread ID if using Win32 native threads
241 * Revision 1.28 2002/03/04 17:59:59 oes
242 * Deleted deletePidFile(), cosmetics
244 * Revision 1.27 2002/03/04 02:08:01 david__schmidt
245 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
247 * Revision 1.26 2002/01/09 19:05:45 steudten
248 * Fix big memory leak.
250 * Revision 1.25 2002/01/09 14:32:08 oes
251 * Added support for gmtime_r and localtime_r.
253 * Revision 1.24 2001/12/30 14:07:32 steudten
254 * - Add signal handling (unix)
255 * - Add SIGHUP handler (unix)
256 * - Add creation of pidfile (unix)
257 * - Add action 'top' in rc file (RH)
258 * - Add entry 'SIGNALS' to manpage
259 * - Add exit message to logfile (unix)
261 * Revision 1.23 2001/11/07 00:02:13 steudten
262 * Add line number in error output for lineparsing for
263 * actionsfile and configfile.
264 * Special handling for CLF added.
266 * Revision 1.22 2001/11/05 23:43:05 steudten
267 * Add time+date to log files.
269 * Revision 1.21 2001/10/25 03:40:47 david__schmidt
270 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
271 * threads to call select() simultaneously. So, it's time to do a real, live,
272 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
273 * (native). Both versions will work, but using __OS2__ offers multi-threading.
275 * Revision 1.20 2001/09/16 23:04:34 jongfoster
278 * Revision 1.19 2001/09/13 20:08:06 jongfoster
279 * Adding support for LOG_LEVEL_CGI
281 * Revision 1.18 2001/09/10 11:27:24 oes
282 * Declaration of w32_socket_strerr now conditional
284 * Revision 1.17 2001/09/10 10:17:13 oes
285 * Removed unused variable; Fixed sprintf format
287 * Revision 1.16 2001/07/30 22:08:36 jongfoster
288 * Tidying up #defines:
289 * - All feature #defines are now of the form FEATURE_xxx
290 * - Permanently turned off WIN_GUI_EDIT
291 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
293 * Revision 1.15 2001/07/29 17:41:10 jongfoster
294 * Now prints thread ID for each message (pthreads only)
296 * Revision 1.14 2001/07/19 19:03:48 haroon
297 * - Added case for LOG_LEVEL_POPUPS
299 * Revision 1.13 2001/07/13 13:58:58 oes
300 * - Added case for LOG_LEVEL_DEANIMATE
301 * - Removed all #ifdef PCRS
303 * Revision 1.12 2001/06/09 10:55:28 jongfoster
304 * Changing BUFSIZ ==> BUFFER_SIZE
306 * Revision 1.11 2001/06/01 18:14:49 jongfoster
307 * Changing the calls to strerr() to check HAVE_STRERR (which is defined
308 * in config.h if appropriate) rather than the NO_STRERR macro.
310 * Revision 1.10 2001/05/29 11:52:21 oes
311 * Conditional compilation of w32_socket_error
313 * Revision 1.9 2001/05/28 16:15:17 jongfoster
314 * Improved reporting of errors under Win32.
316 * Revision 1.8 2001/05/26 17:25:14 jongfoster
317 * Added support for CLF (Common Log Format) and fixed LOG_LEVEL_LOG
319 * Revision 1.7 2001/05/26 15:21:28 jongfoster
320 * Activity animation in Win32 GUI now works even if debug==0
322 * Revision 1.6 2001/05/25 21:55:08 jongfoster
323 * Now cleans up properly on FATAL (removes taskbar icon etc)
325 * Revision 1.5 2001/05/22 18:46:04 oes
327 * - Enabled filtering banners by size rather than URL
328 * by adding patterns that replace all standard banner
329 * sizes with the "Junkbuster" gif to the re_filterfile
331 * - Enabled filtering WebBugs by providing a pattern
332 * which kills all 1x1 images
334 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
335 * which is selected by the (nonstandard and therefore
336 * capital) letter 'U' in the option string.
337 * It causes the quantifiers to be ungreedy by default.
338 * Appending a ? turns back to greedy (!).
340 * - Added a new interceptor ijb-send-banner, which
341 * sends back the "Junkbuster" gif. Without imagelist or
342 * MSIE detection support, or if tinygif = 1, or the
343 * URL isn't recognized as an imageurl, a lame HTML
344 * explanation is sent instead.
346 * - Added new feature, which permits blocking remote
347 * script redirects and firing back a local redirect
349 * The feature is conditionally compiled, i.e. it
350 * can be disabled with --disable-fast-redirects,
351 * plus it must be activated by a "fast-redirects"
352 * line in the config file, has its own log level
353 * and of course wants to be displayed by show-proxy-args
354 * Note: Boy, all the #ifdefs in 1001 locations and
355 * all the fumbling with configure.in and acconfig.h
356 * were *way* more work than the feature itself :-(
358 * - Because a generic redirect template was needed for
359 * this, tinygif = 3 now uses the same.
361 * - Moved GIFs, and other static HTTP response templates
366 * - Removed some >400 CRs again (Jon, you really worked
369 * Revision 1.4 2001/05/21 19:32:54 jongfoster
370 * Added another #ifdef _WIN_CONSOLE
372 * Revision 1.3 2001/05/20 01:11:40 jongfoster
373 * Added support for LOG_LEVEL_FATAL
374 * Renamed LOG_LEVEL_FRC to LOG_LEVEL_FORCE,
375 * and LOG_LEVEL_REF to LOG_LEVEL_RE_FILTER
377 * Revision 1.2 2001/05/17 22:42:01 oes
378 * - Cleaned CRLF's from the sources and related files
379 * - Repaired logging for REF and FRC
381 * Revision 1.1.1.1 2001/05/15 13:58:51 oes
382 * Initial import of version 2.9.3 source tree
385 *********************************************************************/
394 #include "miscutil.h"
396 /* For gettimeofday() */
397 #include <sys/time.h>
399 #if !defined(_WIN32) && !defined(__OS2__)
401 #endif /* !defined(_WIN32) && !defined(__OS2__) */
413 #endif /* ndef _WIN_CONSOLE */
414 #endif /* def _WIN32 */
416 #define inline __inline
417 #endif /* def _MSC_VER */
420 #include <sys/socket.h> /* For sock_errno */
429 const char errlog_h_rcs[] = ERRLOG_H_VERSION;
433 * LOG_LEVEL_FATAL cannot be turned off. (There are
434 * some exceptional situations where we need to get a
435 * message to the user).
437 #define LOG_LEVEL_MINIMUM LOG_LEVEL_FATAL
439 /* where to log (default: stderr) */
440 static FILE *logfp = NULL;
442 /* logging detail level. XXX: stupid name. */
443 static int debug = (LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
445 /* static functions */
446 static void fatal_error(const char * error_message);
448 static char *w32_socket_strerr(int errcode, char *tmp_buf);
451 static char *os2_socket_strerr(int errcode, char *tmp_buf);
454 #ifdef MUTEX_LOCKS_AVAILABLE
455 static inline void lock_logfile(void)
457 privoxy_mutex_lock(&log_mutex);
459 static inline void unlock_logfile(void)
461 privoxy_mutex_unlock(&log_mutex);
463 static inline void lock_loginit(void)
465 privoxy_mutex_lock(&log_init_mutex);
467 static inline void unlock_loginit(void)
469 privoxy_mutex_unlock(&log_init_mutex);
471 #else /* ! MUTEX_LOCKS_AVAILABLE */
473 * FIXME we need a cross-platform locking mechanism.
474 * The locking/unlocking functions below should be
475 * fleshed out for non-pthread implementations.
477 static inline void lock_logfile() {}
478 static inline void unlock_logfile() {}
479 static inline void lock_loginit() {}
480 static inline void unlock_loginit() {}
483 /*********************************************************************
485 * Function : fatal_error
487 * Description : Displays a fatal error to standard error (or, on
488 * a WIN32 GUI, to a dialog box), and exits
489 * JunkBuster with status code 1.
492 * 1 : error_message = The error message to display.
494 * Returns : Does not return.
496 *********************************************************************/
497 static void fatal_error(const char * error_message)
499 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
500 MessageBox(g_hwndLogFrame, error_message, "Privoxy Error",
501 MB_OK | MB_ICONERROR | MB_TASKMODAL | MB_SETFOREGROUND | MB_TOPMOST);
503 /* Cleanup - remove taskbar icon etc. */
505 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
509 fputs(error_message, logfp);
523 /*********************************************************************
525 * Function : show_version
527 * Description : Logs the Privoxy version and the program name.
530 * 1 : prog_name = The program name.
534 *********************************************************************/
535 static void show_version(const char *prog_name)
537 log_error(LOG_LEVEL_INFO, "Privoxy version " VERSION);
538 if (prog_name != NULL)
540 log_error(LOG_LEVEL_INFO, "Program name: %s", prog_name);
545 /*********************************************************************
547 * Function : init_log_module
549 * Description : Initializes the logging module to log to stderr.
550 * Can only be called while stderr hasn't been closed
551 * yet and is only supposed to be called once.
554 * 1 : prog_name = The program name.
558 *********************************************************************/
559 void init_log_module(const char *prog_name)
564 set_debug_level(debug);
565 show_version(prog_name);
569 /*********************************************************************
571 * Function : set_debug_level
573 * Description : Sets the debug level to the provided value
574 * plus LOG_LEVEL_MINIMUM.
576 * XXX: we should only use the LOG_LEVEL_MINIMUM
577 * until the first time the configuration file has
580 * Parameters : 1: debug_level = The debug level to set.
584 *********************************************************************/
585 void set_debug_level(int debug_level)
587 debug = debug_level | LOG_LEVEL_MINIMUM;
591 /*********************************************************************
593 * Function : disable_logging
595 * Description : Disables logging.
601 *********************************************************************/
602 void disable_logging(void)
606 log_error(LOG_LEVEL_INFO,
607 "No logfile configured. Please enable it before reporting any problems.");
616 /*********************************************************************
618 * Function : init_error_log
620 * Description : Initializes the logging module to log to a file.
622 * XXX: should be renamed.
625 * 1 : prog_name = The program name.
626 * 2 : logfname = The logfile to (re)open.
630 *********************************************************************/
631 void init_error_log(const char *prog_name, const char *logfname)
635 assert(NULL != logfname);
641 log_error(LOG_LEVEL_INFO, "(Re-)Opening logfile \'%s\'", logfname);
644 /* set the designated log file */
645 fp = fopen(logfname, "a");
646 if ((NULL == fp) && (logfp != NULL))
649 * Some platforms (like OS/2) don't allow us to open
650 * the same file twice, therefore we give it another
651 * shot after closing the old file descriptor first.
653 * We don't do it right away because it prevents us
654 * from logging the "can't open logfile" message to
657 * XXX: this is a lame workaround and once the next
658 * release is out we should stop bothering reopening
659 * the logfile unless we have to.
661 * Currently we reopen it every time the config file
662 * has been reloaded, but actually we only have to
663 * reopen it if the file name changed or if the
664 * configuration reloas was caused by a SIGHUP.
666 log_error(LOG_LEVEL_INFO, "Failed to reopen logfile: \'%s\'. "
667 "Retrying after closing the old file descriptor first. If that "
668 "doesn't work, Privoxy will exit without being able to log a message.",
674 fp = fopen(logfname, "a");
679 log_error(LOG_LEVEL_FATAL, "init_error_log(): can't open logfile: \'%s\'", logfname);
682 /* set logging to be completely unbuffered */
695 * Prevent the Windows GUI from showing the version two
696 * times in a row on startup. It already displayed the show_version()
697 * call from init_log_module() that other systems write to stderr.
699 * This means mingw32 users will never see the version in their
700 * log file, but I assume they wouldn't look for it there anyway
701 * and simply use the "Help/About Privoxy" menu.
703 show_version(prog_name);
704 #endif /* def unix */
708 } /* init_error_log */
711 /*********************************************************************
713 * Function : get_thread_id
715 * Description : Returns a number that is different for each thread.
717 * XXX: Should be moved elsewhere (miscutil.c?)
721 * Returns : thread_id
723 *********************************************************************/
724 static long get_thread_id(void)
726 long this_thread = 1; /* was: pthread_t this_thread;*/
730 APIRET ulrc; /* XXX: I have no clue what this does */
733 /* FIXME get current thread id */
734 #ifdef FEATURE_PTHREAD
735 this_thread = (long)pthread_self();
738 * Mac OSX (and perhaps other Mach instances) doesn't have a debuggable
739 * value at the first 4 bytes of pthread_self()'s return value, a pthread_t.
740 * pthread_t is supposed to be opaque... but it's fairly random, though, so
741 * we make it mostly presentable.
743 this_thread = abs(this_thread % 1000);
744 #endif /* def __MACH__ */
745 #elif defined(_WIN32)
746 this_thread = GetCurrentThreadId();
747 #elif defined(__OS2__)
748 ulrc = DosGetInfoBlocks(&ptib, NULL);
750 this_thread = ptib -> tib_ptib2 -> tib2_ultid;
751 #endif /* def FEATURE_PTHREAD */
757 /*********************************************************************
759 * Function : get_log_timestamp
761 * Description : Generates the time stamp for the log message prefix.
764 * 1 : buffer = Storage buffer
765 * 2 : buffer_size = Size of storage buffer
767 * Returns : Number of written characters or 0 for error.
769 *********************************************************************/
770 static inline size_t get_log_timestamp(char *buffer, size_t buffer_size)
775 struct timeval tv_now; /* XXX: stupid name */
777 int msecs_length = 0;
779 gettimeofday(&tv_now, NULL);
780 msecs = tv_now.tv_usec / 1000;
784 #ifdef HAVE_LOCALTIME_R
785 tm_now = *localtime_r(&now, &tm_now);
786 #elif FEATURE_PTHREAD
787 privoxy_mutex_lock(&localtime_mutex);
788 tm_now = *localtime(&now);
789 privoxy_mutex_unlock(&localtime_mutex);
791 tm_now = *localtime(&now);
794 length = strftime(buffer, buffer_size, "%b %d %H:%M:%S", &tm_now);
797 msecs_length = snprintf(buffer+length, buffer_size - length, ".%.3ld", msecs);
799 if (msecs_length > 0)
801 length += (size_t)msecs_length;
812 /*********************************************************************
814 * Function : get_clf_timestamp
816 * Description : Generates a Common Log Format time string.
819 * 1 : buffer = Storage buffer
820 * 2 : buffer_size = Size of storage buffer
822 * Returns : Number of written characters or 0 for error.
824 *********************************************************************/
825 static inline size_t get_clf_timestamp(char *buffer, size_t buffer_size)
828 * Complex because not all OSs have tm_gmtoff or
829 * the %z field in strftime()
834 #ifdef HAVE_LOCALTIME_R
843 gmt = *gmtime_r(&now, &gmt);
844 #elif FEATURE_PTHREAD
845 privoxy_mutex_lock(&gmtime_mutex);
847 privoxy_mutex_unlock(&gmtime_mutex);
851 #ifdef HAVE_LOCALTIME_R
852 tm_now = localtime_r(&now, &dummy);
853 #elif FEATURE_PTHREAD
854 privoxy_mutex_lock(&localtime_mutex);
855 tm_now = localtime(&now);
856 privoxy_mutex_unlock(&localtime_mutex);
858 tm_now = localtime(&now);
860 days = tm_now->tm_yday - gmt.tm_yday;
861 hrs = ((days < -1 ? 24 : 1 < days ? -24 : days * 24) + tm_now->tm_hour - gmt.tm_hour);
862 mins = hrs * 60 + tm_now->tm_min - gmt.tm_min;
864 length = strftime(buffer, buffer_size, "%d/%b/%Y:%H:%M:%S ", tm_now);
868 tz_length = snprintf(buffer+length, buffer_size-length,
869 "%+03d%02d", mins / 60, abs(mins) % 60);
873 length += (size_t)tz_length;
884 /*********************************************************************
886 * Function : get_log_level_string
888 * Description : Translates a numerical loglevel into a string.
891 * 1 : loglevel = LOG_LEVEL_FOO
893 * Returns : Log level string.
895 *********************************************************************/
896 static inline const char *get_log_level_string(int loglevel)
898 char *log_level_string = NULL;
900 assert(0 < loglevel);
904 case LOG_LEVEL_ERROR:
905 log_level_string = "Error";
907 case LOG_LEVEL_FATAL:
908 log_level_string = "Fatal error";
911 log_level_string = "Request";
913 case LOG_LEVEL_CONNECT:
914 log_level_string = "Connect";
917 log_level_string = "Writing";
919 case LOG_LEVEL_HEADER:
920 log_level_string = "Header";
923 log_level_string = "Info";
925 case LOG_LEVEL_RE_FILTER:
926 log_level_string = "Re-Filter";
928 #ifdef FEATURE_FORCE_LOAD
929 case LOG_LEVEL_FORCE:
930 log_level_string = "Force";
932 #endif /* def FEATURE_FORCE_LOAD */
933 #ifdef FEATURE_FAST_REDIRECTS
934 case LOG_LEVEL_REDIRECTS:
935 log_level_string = "Redirect";
937 #endif /* def FEATURE_FAST_REDIRECTS */
938 case LOG_LEVEL_DEANIMATE:
939 log_level_string = "Gif-Deanimate";
942 log_level_string = "CGI";
945 log_level_string = "Unknown log level";
948 assert(NULL != log_level_string);
950 return log_level_string;
954 /*********************************************************************
956 * Function : log_error
958 * Description : This is the error-reporting and logging function.
961 * 1 : loglevel = the type of message to be logged
962 * 2 : fmt = the main string we want logged, printf-like
963 * 3 : ... = arguments to be inserted in fmt (printf-like).
967 *********************************************************************/
968 void log_error(int loglevel, const char *fmt, ...)
972 static char *outbuf_save = NULL;
973 char tempbuf[BUFFER_SIZE];
975 const char * src = fmt;
979 * XXX: Make this a config option,
980 * why else do we allocate instead of using
983 size_t log_buffer_size = BUFFER_SIZE;
985 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
987 * Irrespective of debug setting, a GET/POST/CONNECT makes
988 * the taskbar icon animate. (There is an option to disable
989 * this but checking that is handled inside LogShowActivity()).
991 if (loglevel == LOG_LEVEL_GPC)
995 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
998 * verify that the loglevel applies to current
999 * settings and that logging is enabled.
1000 * Bail out otherwise.
1002 if ((0 == (loglevel & debug))
1011 thread_id = get_thread_id();
1012 get_log_timestamp(timestamp, sizeof(timestamp));
1014 /* protect the whole function because of the static buffer (outbuf) */
1017 if (NULL == outbuf_save)
1019 outbuf_save = (char*)zalloc(log_buffer_size + 1); /* +1 for paranoia */
1020 if (NULL == outbuf_save)
1022 snprintf(tempbuf, sizeof(tempbuf),
1023 "%s Privoxy(%08lx) Fatal error: log_error() failed to allocate buffer memory.\n"
1024 "\nExiting.", timestamp, thread_id);
1025 fatal_error(tempbuf); /* Exit */
1028 outbuf = outbuf_save;
1031 * Memsetting the whole buffer to zero (in theory)
1032 * makes things easier later on.
1034 memset(outbuf, 0, log_buffer_size);
1036 /* Add prefix for everything but Common Log Format messages */
1037 if (loglevel != LOG_LEVEL_CLF)
1039 length = (size_t)snprintf(outbuf, log_buffer_size, "%s Privoxy(%08lx) %s: ",
1040 timestamp, thread_id, get_log_level_string(loglevel));
1043 /* get ready to scan var. args. */
1046 /* build formatted message from fmt and var-args */
1047 while ((*src) && (length < log_buffer_size-2))
1049 const char *sval = NULL; /* %N string */
1050 int ival; /* %N string length or an error code */
1051 unsigned uval; /* %u value */
1052 long lval; /* %l value */
1053 unsigned long ulval; /* %ul value */
1055 const char *format_string = tempbuf;
1060 outbuf[length++] = ch;
1062 * XXX: Only necessary on platforms where multiple threads
1063 * can write to the buffer at the same time because we
1064 * don't support mutexes (OS/2 for example).
1066 outbuf[length] = '\0';
1069 outbuf[length] = '\0';
1077 ival = va_arg( ap, int );
1078 snprintf(tempbuf, sizeof(tempbuf), "%d", ival);
1081 uval = va_arg( ap, unsigned );
1082 snprintf(tempbuf, sizeof(tempbuf), "%u", uval);
1085 /* this is a modifier that must be followed by u or d */
1089 lval = va_arg( ap, long );
1090 snprintf(tempbuf, sizeof(tempbuf), "%ld", lval);
1094 ulval = va_arg( ap, unsigned long );
1095 snprintf(tempbuf, sizeof(tempbuf), "%lu", ulval);
1099 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1100 loglevel = LOG_LEVEL_FATAL;
1105 * Note that char paramaters are converted to int, so we need to
1106 * pass "int" to va_arg. (See K&R, 2nd ed, section A7.3.2, page 202)
1108 tempbuf[0] = (char) va_arg(ap, int);
1112 format_string = va_arg(ap, char *);
1113 if (format_string == NULL)
1115 format_string = "[null]";
1120 * Non-standard: Print a counted unterminated string.
1121 * Takes 2 parameters: int length, const char * string.
1123 ival = va_arg(ap, int);
1124 sval = va_arg(ap, char *);
1127 format_string = "[null]";
1133 /* That's ok (but stupid) */
1139 * That's not ok (and even more stupid)
1142 format_string = "[counted string lenght < 0]";
1145 else if (ival >= sizeof(tempbuf))
1148 * String is too long, copy as much as possible.
1149 * It will be further truncated later.
1151 memcpy(tempbuf, sval, sizeof(tempbuf)-1);
1152 tempbuf[sizeof(tempbuf)-1] = '\0';
1156 memcpy(tempbuf, sval, (size_t) ival);
1157 tempbuf[ival] = '\0';
1161 /* Non-standard: Print error code from errno */
1163 ival = WSAGetLastError();
1164 format_string = w32_socket_strerr(ival, tempbuf);
1166 ival = sock_errno();
1169 format_string = os2_socket_strerr(ival, tempbuf);
1174 format_string = strerror(ival);
1176 #else /* ifndef _WIN32 */
1178 #ifdef HAVE_STRERROR
1179 format_string = strerror(ival);
1180 #else /* ifndef HAVE_STRERROR */
1181 format_string = NULL;
1182 #endif /* ndef HAVE_STRERROR */
1185 snprintf(tempbuf, sizeof(tempbuf), "(errno = %d)", ival);
1187 #endif /* ndef _WIN32 */
1190 /* Non-standard: Print a Common Log File timestamp */
1191 get_clf_timestamp(tempbuf, sizeof(tempbuf));
1194 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1195 loglevel = LOG_LEVEL_FATAL;
1199 assert(length < log_buffer_size);
1200 length += strlcpy(outbuf + length, format_string, log_buffer_size - length);
1202 if (length >= log_buffer_size-2)
1204 static char warning[] = "... [too long, truncated]";
1206 length = log_buffer_size - sizeof(warning) - 1;
1207 length += strlcpy(outbuf + length, warning, log_buffer_size - length);
1208 assert(length < log_buffer_size);
1212 } /* for( p ... ) */
1214 /* done with var. args */
1217 assert(length < log_buffer_size);
1218 length += strlcpy(outbuf + length, "\n", log_buffer_size - length);
1220 /* Some sanity checks */
1221 if ((length >= log_buffer_size)
1222 || (outbuf[log_buffer_size-1] != '\0')
1223 || (outbuf[log_buffer_size] != '\0')
1226 /* Repeat as assertions */
1227 assert(length < log_buffer_size);
1228 assert(outbuf[log_buffer_size-1] == '\0');
1230 * outbuf's real size is log_buffer_size+1,
1231 * so while this looks like an off-by-one,
1232 * we're only checking our paranoia byte.
1234 assert(outbuf[log_buffer_size] == '\0');
1236 snprintf(outbuf, log_buffer_size,
1237 "%s Privoxy(%08lx) Fatal error: log_error()'s sanity checks failed. length: %d\n"
1238 "Exiting.", timestamp, thread_id, (int)length);
1239 loglevel = LOG_LEVEL_FATAL;
1244 * On Windows this is acceptable in case
1245 * we are logging to the GUI window only.
1247 assert(NULL != logfp);
1250 if (loglevel == LOG_LEVEL_FATAL)
1252 fatal_error(outbuf_save);
1253 /* Never get here */
1257 fputs(outbuf_save, logfp);
1260 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
1261 /* Write to display */
1262 LogPutString(outbuf_save);
1263 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1270 /*********************************************************************
1272 * Function : jb_err_to_string
1274 * Description : Translates JB_ERR_FOO codes into strings.
1276 * XXX: the type of error codes is jb_err
1277 * but the typedef'inition is currently not
1278 * visible to all files that include errlog.h.
1281 * 1 : error = a valid jb_err code
1283 * Returns : A string with the jb_err translation
1285 *********************************************************************/
1286 const char *jb_err_to_string(int error)
1291 return "Success, no error";
1293 return "Out of memory";
1294 case JB_ERR_CGI_PARAMS:
1295 return "Missing or corrupt CGI parameters";
1297 return "Error opening, reading or writing a file";
1299 return "Parse error";
1300 case JB_ERR_MODIFIED:
1301 return "File has been modified outside of the CGI actions editor.";
1302 case JB_ERR_COMPRESS:
1303 return "(De)compression failure";
1306 return "Unknown error";
1309 return "Internal error";
1313 /*********************************************************************
1315 * Function : w32_socket_strerr
1317 * Description : Translate the return value from WSAGetLastError()
1321 * 1 : errcode = The return value from WSAGetLastError().
1322 * 2 : tmp_buf = A temporary buffer that might be used to
1325 * Returns : String representing the error code. This may be
1326 * a global string constant or a string stored in
1329 *********************************************************************/
1330 static char *w32_socket_strerr(int errcode, char *tmp_buf)
1332 #define TEXT_FOR_ERROR(code,text) \
1333 if (errcode == code) \
1335 return #code " - " text; \
1338 TEXT_FOR_ERROR(WSAEACCES, "Permission denied")
1339 TEXT_FOR_ERROR(WSAEADDRINUSE, "Address already in use.")
1340 TEXT_FOR_ERROR(WSAEADDRNOTAVAIL, "Cannot assign requested address.");
1341 TEXT_FOR_ERROR(WSAEAFNOSUPPORT, "Address family not supported by protocol family.");
1342 TEXT_FOR_ERROR(WSAEALREADY, "Operation already in progress.");
1343 TEXT_FOR_ERROR(WSAECONNABORTED, "Software caused connection abort.");
1344 TEXT_FOR_ERROR(WSAECONNREFUSED, "Connection refused.");
1345 TEXT_FOR_ERROR(WSAECONNRESET, "Connection reset by peer.");
1346 TEXT_FOR_ERROR(WSAEDESTADDRREQ, "Destination address required.");
1347 TEXT_FOR_ERROR(WSAEFAULT, "Bad address.");
1348 TEXT_FOR_ERROR(WSAEHOSTDOWN, "Host is down.");
1349 TEXT_FOR_ERROR(WSAEHOSTUNREACH, "No route to host.");
1350 TEXT_FOR_ERROR(WSAEINPROGRESS, "Operation now in progress.");
1351 TEXT_FOR_ERROR(WSAEINTR, "Interrupted function call.");
1352 TEXT_FOR_ERROR(WSAEINVAL, "Invalid argument.");
1353 TEXT_FOR_ERROR(WSAEISCONN, "Socket is already connected.");
1354 TEXT_FOR_ERROR(WSAEMFILE, "Too many open sockets.");
1355 TEXT_FOR_ERROR(WSAEMSGSIZE, "Message too long.");
1356 TEXT_FOR_ERROR(WSAENETDOWN, "Network is down.");
1357 TEXT_FOR_ERROR(WSAENETRESET, "Network dropped connection on reset.");
1358 TEXT_FOR_ERROR(WSAENETUNREACH, "Network is unreachable.");
1359 TEXT_FOR_ERROR(WSAENOBUFS, "No buffer space available.");
1360 TEXT_FOR_ERROR(WSAENOPROTOOPT, "Bad protocol option.");
1361 TEXT_FOR_ERROR(WSAENOTCONN, "Socket is not connected.");
1362 TEXT_FOR_ERROR(WSAENOTSOCK, "Socket operation on non-socket.");
1363 TEXT_FOR_ERROR(WSAEOPNOTSUPP, "Operation not supported.");
1364 TEXT_FOR_ERROR(WSAEPFNOSUPPORT, "Protocol family not supported.");
1365 TEXT_FOR_ERROR(WSAEPROCLIM, "Too many processes.");
1366 TEXT_FOR_ERROR(WSAEPROTONOSUPPORT, "Protocol not supported.");
1367 TEXT_FOR_ERROR(WSAEPROTOTYPE, "Protocol wrong type for socket.");
1368 TEXT_FOR_ERROR(WSAESHUTDOWN, "Cannot send after socket shutdown.");
1369 TEXT_FOR_ERROR(WSAESOCKTNOSUPPORT, "Socket type not supported.");
1370 TEXT_FOR_ERROR(WSAETIMEDOUT, "Connection timed out.");
1371 TEXT_FOR_ERROR(WSAEWOULDBLOCK, "Resource temporarily unavailable.");
1372 TEXT_FOR_ERROR(WSAHOST_NOT_FOUND, "Host not found.");
1373 TEXT_FOR_ERROR(WSANOTINITIALISED, "Successful WSAStartup not yet performed.");
1374 TEXT_FOR_ERROR(WSANO_DATA, "Valid name, no data record of requested type.");
1375 TEXT_FOR_ERROR(WSANO_RECOVERY, "This is a non-recoverable error.");
1376 TEXT_FOR_ERROR(WSASYSNOTREADY, "Network subsystem is unavailable.");
1377 TEXT_FOR_ERROR(WSATRY_AGAIN, "Non-authoritative host not found.");
1378 TEXT_FOR_ERROR(WSAVERNOTSUPPORTED, "WINSOCK.DLL version out of range.");
1379 TEXT_FOR_ERROR(WSAEDISCON, "Graceful shutdown in progress.");
1381 * The following error codes are documented in the Microsoft WinSock
1382 * reference guide, but don't actually exist.
1384 * TEXT_FOR_ERROR(WSA_INVALID_HANDLE, "Specified event object handle is invalid.");
1385 * TEXT_FOR_ERROR(WSA_INVALID_PARAMETER, "One or more parameters are invalid.");
1386 * TEXT_FOR_ERROR(WSAINVALIDPROCTABLE, "Invalid procedure table from service provider.");
1387 * TEXT_FOR_ERROR(WSAINVALIDPROVIDER, "Invalid service provider version number.");
1388 * TEXT_FOR_ERROR(WSA_IO_PENDING, "Overlapped operations will complete later.");
1389 * TEXT_FOR_ERROR(WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state.");
1390 * TEXT_FOR_ERROR(WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available.");
1391 * TEXT_FOR_ERROR(WSAPROVIDERFAILEDINIT, "Unable to initialize a service provider.");
1392 * TEXT_FOR_ERROR(WSASYSCALLFAILURE, "System call failure.");
1393 * TEXT_FOR_ERROR(WSA_OPERATION_ABORTED, "Overlapped operation aborted.");
1396 sprintf(tmp_buf, "(error number %d)", errcode);
1399 #endif /* def _WIN32 */
1403 /*********************************************************************
1405 * Function : os2_socket_strerr
1407 * Description : Translate the return value from sock_errno()
1411 * 1 : errcode = The return value from sock_errno().
1412 * 2 : tmp_buf = A temporary buffer that might be used to
1415 * Returns : String representing the error code. This may be
1416 * a global string constant or a string stored in
1419 *********************************************************************/
1420 static char *os2_socket_strerr(int errcode, char *tmp_buf)
1422 #define TEXT_FOR_ERROR(code,text) \
1423 if (errcode == code) \
1425 return #code " - " text; \
1428 TEXT_FOR_ERROR(SOCEPERM , "Not owner.")
1429 TEXT_FOR_ERROR(SOCESRCH , "No such process.")
1430 TEXT_FOR_ERROR(SOCEINTR , "Interrupted system call.")
1431 TEXT_FOR_ERROR(SOCENXIO , "No such device or address.")
1432 TEXT_FOR_ERROR(SOCEBADF , "Bad file number.")
1433 TEXT_FOR_ERROR(SOCEACCES , "Permission denied.")
1434 TEXT_FOR_ERROR(SOCEFAULT , "Bad address.")
1435 TEXT_FOR_ERROR(SOCEINVAL , "Invalid argument.")
1436 TEXT_FOR_ERROR(SOCEMFILE , "Too many open files.")
1437 TEXT_FOR_ERROR(SOCEPIPE , "Broken pipe.")
1438 TEXT_FOR_ERROR(SOCEWOULDBLOCK , "Operation would block.")
1439 TEXT_FOR_ERROR(SOCEINPROGRESS , "Operation now in progress.")
1440 TEXT_FOR_ERROR(SOCEALREADY , "Operation already in progress.")
1441 TEXT_FOR_ERROR(SOCENOTSOCK , "Socket operation on non-socket.")
1442 TEXT_FOR_ERROR(SOCEDESTADDRREQ , "Destination address required.")
1443 TEXT_FOR_ERROR(SOCEMSGSIZE , "Message too long.")
1444 TEXT_FOR_ERROR(SOCEPROTOTYPE , "Protocol wrong type for socket.")
1445 TEXT_FOR_ERROR(SOCENOPROTOOPT , "Protocol not available.")
1446 TEXT_FOR_ERROR(SOCEPROTONOSUPPORT, "Protocol not supported.")
1447 TEXT_FOR_ERROR(SOCESOCKTNOSUPPORT, "Socket type not supported.")
1448 TEXT_FOR_ERROR(SOCEOPNOTSUPP , "Operation not supported.")
1449 TEXT_FOR_ERROR(SOCEPFNOSUPPORT , "Protocol family not supported.")
1450 TEXT_FOR_ERROR(SOCEAFNOSUPPORT , "Address family not supported by protocol family.")
1451 TEXT_FOR_ERROR(SOCEADDRINUSE , "Address already in use.")
1452 TEXT_FOR_ERROR(SOCEADDRNOTAVAIL , "Can't assign requested address.")
1453 TEXT_FOR_ERROR(SOCENETDOWN , "Network is down.")
1454 TEXT_FOR_ERROR(SOCENETUNREACH , "Network is unreachable.")
1455 TEXT_FOR_ERROR(SOCENETRESET , "Network dropped connection on reset.")
1456 TEXT_FOR_ERROR(SOCECONNABORTED , "Software caused connection abort.")
1457 TEXT_FOR_ERROR(SOCECONNRESET , "Connection reset by peer.")
1458 TEXT_FOR_ERROR(SOCENOBUFS , "No buffer space available.")
1459 TEXT_FOR_ERROR(SOCEISCONN , "Socket is already connected.")
1460 TEXT_FOR_ERROR(SOCENOTCONN , "Socket is not connected.")
1461 TEXT_FOR_ERROR(SOCESHUTDOWN , "Can't send after socket shutdown.")
1462 TEXT_FOR_ERROR(SOCETOOMANYREFS , "Too many references: can't splice.")
1463 TEXT_FOR_ERROR(SOCETIMEDOUT , "Operation timed out.")
1464 TEXT_FOR_ERROR(SOCECONNREFUSED , "Connection refused.")
1465 TEXT_FOR_ERROR(SOCELOOP , "Too many levels of symbolic links.")
1466 TEXT_FOR_ERROR(SOCENAMETOOLONG , "File name too long.")
1467 TEXT_FOR_ERROR(SOCEHOSTDOWN , "Host is down.")
1468 TEXT_FOR_ERROR(SOCEHOSTUNREACH , "No route to host.")
1469 TEXT_FOR_ERROR(SOCENOTEMPTY , "Directory not empty.")
1470 TEXT_FOR_ERROR(SOCEOS2ERR , "OS/2 Error.")
1472 sprintf(tmp_buf, "(error number %d)", errcode);
1475 #endif /* def __OS2__ */