1 const char errlog_rcs[] = "$Id: errlog.c,v 1.85 2009/02/06 17:51:38 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) 2001-2009 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 1.85 2009/02/06 17:51:38 fabiankeil
37 * Be prepared if I break the log module initialization again.
39 * Revision 1.84 2008/12/14 15:46:22 fabiankeil
40 * Give crunched requests their own log level.
42 * Revision 1.83 2008/12/04 18:14:32 fabiankeil
43 * Fix some cparser warnings.
45 * Revision 1.82 2008/11/23 16:06:58 fabiankeil
46 * Update a log message I missed in 1.80.
48 * Revision 1.81 2008/11/23 15:59:27 fabiankeil
49 * - Update copyright range.
50 * - Remove stray line breaks in a log message
51 * nobody is supposed to see anyway.
53 * Revision 1.80 2008/11/23 15:49:49 fabiankeil
54 * In log_error(), don't surround the thread id with "Privoxy(" and ")".
56 * Revision 1.79 2008/10/20 17:09:25 fabiankeil
57 * Update init_error_log() description to match reality.
59 * Revision 1.78 2008/09/07 16:59:31 fabiankeil
60 * Update a comment to reflect that we
61 * have mutex support on mingw32 now.
63 * Revision 1.77 2008/09/07 12:43:44 fabiankeil
64 * Move the LogPutString() call in log_error() into the locked
65 * region so the Windows GUI log is consistent with the logfile.
67 * Revision 1.76 2008/09/07 12:35:05 fabiankeil
68 * Add mutex lock support for _WIN32.
70 * Revision 1.75 2008/09/04 08:13:58 fabiankeil
71 * Prepare for critical sections on Windows by adding a
72 * layer of indirection before the pthread mutex functions.
74 * Revision 1.74 2008/08/06 18:33:36 fabiankeil
75 * If the "close fd first" workaround doesn't work,
76 * the fatal error message will be lost, so we better
77 * explain the consequences while we still can.
79 * Revision 1.73 2008/08/04 19:06:55 fabiankeil
80 * Add a lame workaround for the "can't open an already open
81 * logfile on OS/2" problem reported by Maynard in #2028842
82 * and describe what a real solution would look like.
84 * Revision 1.72 2008/07/27 12:04:28 fabiankeil
87 * Revision 1.71 2008/06/28 17:17:15 fabiankeil
88 * Remove another stray semicolon.
90 * Revision 1.70 2008/06/28 17:10:29 fabiankeil
91 * Remove stray semicolon in get_log_timestamp().
92 * Reported by Jochen Voss in #2005221.
94 * Revision 1.69 2008/05/30 15:55:25 fabiankeil
95 * Declare variable "debug" static and complain about its name.
97 * Revision 1.68 2008/04/27 16:50:46 fabiankeil
98 * Remove an incorrect assertion. The value of debug may change if
99 * the configuration is reloaded in another thread. While we could
100 * cache the initial value, the assertion doesn't seem worth it.
102 * Revision 1.67 2008/03/27 18:27:23 fabiankeil
103 * Remove kill-popups action.
105 * Revision 1.66 2008/01/31 15:38:14 fabiankeil
106 * - Make the logfp assertion more strict. As of 1.63, the "||" could
107 * have been an "&&", which means we can use two separate assertions
108 * and skip on of them on Windows.
109 * - Break a long commit message line in two.
111 * Revision 1.65 2008/01/31 14:44:33 fabiankeil
112 * Use (a != b) instead of !(a == b) so the sanity check looks less insane.
114 * Revision 1.64 2008/01/21 18:56:46 david__schmidt
115 * Swap #def from negative to positive, re-joined it so it didn't
116 * span an assertion (compilation failure on OS/2)
118 * Revision 1.63 2007/12/15 19:49:32 fabiankeil
119 * Stop overloading logfile to control the mingw32 log window as well.
120 * It's no longer necessary now that we disable all debug lines by default
121 * and at least one user perceived it as a regression (added in 1.55).
123 * Revision 1.62 2007/11/30 15:33:46 fabiankeil
124 * Unbreak LOG_LEVEL_FATAL. It wasn't fatal with logging disabled
125 * and on mingw32 fatal log messages didn't end up in the log file.
127 * Revision 1.61 2007/11/04 19:03:01 fabiankeil
128 * Fix another deadlock Hal spotted and that mysteriously didn't affect FreeBSD.
130 * Revision 1.60 2007/11/03 19:03:31 fabiankeil
131 * - Prevent the Windows GUI from showing the version two times in a row.
132 * - Stop using the imperative in the "(Re-)Open logfile" message.
133 * - Ditch the "Switching to daemon mode" message as the detection
134 * whether or not we're already in daemon mode doesn't actually work.
136 * Revision 1.59 2007/11/01 12:50:56 fabiankeil
137 * Here's looking at you, deadlock.
139 * Revision 1.58 2007/10/28 19:04:21 fabiankeil
140 * Don't mention daemon mode in "Logging disabled" message. Some
141 * platforms call it differently and it's not really relevant anyway.
143 * Revision 1.57 2007/10/27 13:02:26 fabiankeil
144 * Relocate daemon-mode-related log messages to make sure
145 * they aren't shown again in case of configuration reloads.
147 * Revision 1.56 2007/10/14 14:26:56 fabiankeil
148 * Remove the old log_error() version.
150 * Revision 1.55 2007/10/14 14:12:41 fabiankeil
151 * When in daemon mode, close stderr after the configuration file has been
152 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
154 * Revision 1.54 2007/09/22 16:15:34 fabiankeil
155 * - Let it compile with pcc.
156 * - Move our includes below system includes to prevent macro conflicts.
158 * Revision 1.53 2007/08/05 13:53:14 fabiankeil
159 * #1763173 from Stefan Huehner: declare some more functions
160 * static and use void instead of empty parameter lists.
162 * Revision 1.52 2007/07/14 07:28:47 fabiankeil
163 * Add translation function for JB_ERR_FOO codes.
165 * Revision 1.51 2007/05/11 11:51:34 fabiankeil
166 * Fix a type mismatch warning.
168 * Revision 1.50 2007/04/11 10:55:44 fabiankeil
169 * Enforce some assertions that could be triggered
170 * on mingw32 and other systems where we use threads
173 * Revision 1.49 2007/04/08 16:44:15 fabiankeil
174 * We need <sys/time.h> for gettimeofday(), not <time.h>.
176 * Revision 1.48 2007/03/31 13:33:28 fabiankeil
177 * Add alternative log_error() with timestamps
178 * that contain milliseconds and without using
179 * strcpy(), strcat() or sprintf().
181 * Revision 1.47 2006/11/28 15:25:15 fabiankeil
182 * Only unlink the pidfile if it's actually used.
184 * Revision 1.46 2006/11/13 19:05:51 fabiankeil
185 * Make pthread mutex locking more generic. Instead of
186 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
187 * and use mutex locking unless there is an _r function
188 * available. Better safe than sorry.
190 * Fixes "./configure --disable-pthread" and should result
191 * in less threading-related problems on pthread-using platforms,
192 * but it still doesn't fix BR#1122404.
194 * Revision 1.45 2006/08/21 11:15:54 david__schmidt
195 * MS Visual C++ build updates
197 * Revision 1.44 2006/08/18 16:03:16 david__schmidt
198 * Tweak for OS/2 build happiness.
200 * Revision 1.43 2006/08/03 02:46:41 david__schmidt
201 * Incorporate Fabian Keil's patch work:
202 * http://www.fabiankeil.de/sourcecode/privoxy/
204 * Revision 1.42 2006/07/18 14:48:46 david__schmidt
205 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
206 * with what was really the latest development (the v_3_0_branch branch)
208 * Revision 1.40.2.4 2005/04/03 20:10:50 david__schmidt
209 * Thanks to Jindrich Makovicka for a race condition fix for the log
210 * file. The race condition remains for non-pthread implementations.
211 * Reference patch #1175720.
213 * Revision 1.40.2.3 2003/03/07 03:41:04 david__schmidt
214 * Wrapping all *_r functions (the non-_r versions of them) with mutex
215 * semaphores for OSX. Hopefully this will take care of all of those pesky
218 * Revision 1.40.2.2 2002/09/28 00:30:57 david__schmidt
219 * Update error logging to give sane values for thread IDs on Mach kernels.
220 * It's still a hack, but at least it looks farily normal. We print the
221 * absolute value of the first 4 bytes of the pthread_t modded with 1000.
223 * Revision 1.40.2.1 2002/09/25 12:47:42 oes
224 * Make log_error safe against NULL string arguments
226 * Revision 1.40 2002/05/22 01:27:27 david__schmidt
228 * Add os2_socket_strerr mirroring w32_socket_strerr.
230 * Revision 1.39 2002/04/03 17:15:27 gliptak
231 * zero padding thread ids in log
233 * Revision 1.38 2002/03/31 17:18:59 jongfoster
234 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
236 * Revision 1.37 2002/03/27 14:32:43 david__schmidt
237 * More compiler warning message maintenance
239 * Revision 1.36 2002/03/26 22:29:54 swa
240 * we have a new homepage!
242 * Revision 1.35 2002/03/24 15:23:33 jongfoster
245 * Revision 1.34 2002/03/24 13:25:43 swa
246 * name change related issues
248 * Revision 1.33 2002/03/13 00:27:04 jongfoster
251 * Revision 1.32 2002/03/07 03:46:17 oes
252 * Fixed compiler warnings
254 * Revision 1.31 2002/03/06 23:02:57 jongfoster
257 * Revision 1.30 2002/03/05 22:43:45 david__schmidt
258 * - Better error reporting on OS/2
259 * - Fix double-slash comment (oops)
261 * Revision 1.29 2002/03/04 23:45:13 jongfoster
262 * Printing thread ID if using Win32 native threads
264 * Revision 1.28 2002/03/04 17:59:59 oes
265 * Deleted deletePidFile(), cosmetics
267 * Revision 1.27 2002/03/04 02:08:01 david__schmidt
268 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
270 * Revision 1.26 2002/01/09 19:05:45 steudten
271 * Fix big memory leak.
273 * Revision 1.25 2002/01/09 14:32:08 oes
274 * Added support for gmtime_r and localtime_r.
276 * Revision 1.24 2001/12/30 14:07:32 steudten
277 * - Add signal handling (unix)
278 * - Add SIGHUP handler (unix)
279 * - Add creation of pidfile (unix)
280 * - Add action 'top' in rc file (RH)
281 * - Add entry 'SIGNALS' to manpage
282 * - Add exit message to logfile (unix)
284 * Revision 1.23 2001/11/07 00:02:13 steudten
285 * Add line number in error output for lineparsing for
286 * actionsfile and configfile.
287 * Special handling for CLF added.
289 * Revision 1.22 2001/11/05 23:43:05 steudten
290 * Add time+date to log files.
292 * Revision 1.21 2001/10/25 03:40:47 david__schmidt
293 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
294 * threads to call select() simultaneously. So, it's time to do a real, live,
295 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
296 * (native). Both versions will work, but using __OS2__ offers multi-threading.
298 * Revision 1.20 2001/09/16 23:04:34 jongfoster
301 * Revision 1.19 2001/09/13 20:08:06 jongfoster
302 * Adding support for LOG_LEVEL_CGI
304 * Revision 1.18 2001/09/10 11:27:24 oes
305 * Declaration of w32_socket_strerr now conditional
307 * Revision 1.17 2001/09/10 10:17:13 oes
308 * Removed unused variable; Fixed sprintf format
310 * Revision 1.16 2001/07/30 22:08:36 jongfoster
311 * Tidying up #defines:
312 * - All feature #defines are now of the form FEATURE_xxx
313 * - Permanently turned off WIN_GUI_EDIT
314 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
316 * Revision 1.15 2001/07/29 17:41:10 jongfoster
317 * Now prints thread ID for each message (pthreads only)
319 * Revision 1.14 2001/07/19 19:03:48 haroon
320 * - Added case for LOG_LEVEL_POPUPS
322 * Revision 1.13 2001/07/13 13:58:58 oes
323 * - Added case for LOG_LEVEL_DEANIMATE
324 * - Removed all #ifdef PCRS
326 * Revision 1.12 2001/06/09 10:55:28 jongfoster
327 * Changing BUFSIZ ==> BUFFER_SIZE
329 * Revision 1.11 2001/06/01 18:14:49 jongfoster
330 * Changing the calls to strerr() to check HAVE_STRERR (which is defined
331 * in config.h if appropriate) rather than the NO_STRERR macro.
333 * Revision 1.10 2001/05/29 11:52:21 oes
334 * Conditional compilation of w32_socket_error
336 * Revision 1.9 2001/05/28 16:15:17 jongfoster
337 * Improved reporting of errors under Win32.
339 * Revision 1.8 2001/05/26 17:25:14 jongfoster
340 * Added support for CLF (Common Log Format) and fixed LOG_LEVEL_LOG
342 * Revision 1.7 2001/05/26 15:21:28 jongfoster
343 * Activity animation in Win32 GUI now works even if debug==0
345 * Revision 1.6 2001/05/25 21:55:08 jongfoster
346 * Now cleans up properly on FATAL (removes taskbar icon etc)
348 * Revision 1.5 2001/05/22 18:46:04 oes
350 * - Enabled filtering banners by size rather than URL
351 * by adding patterns that replace all standard banner
352 * sizes with the "Junkbuster" gif to the re_filterfile
354 * - Enabled filtering WebBugs by providing a pattern
355 * which kills all 1x1 images
357 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
358 * which is selected by the (nonstandard and therefore
359 * capital) letter 'U' in the option string.
360 * It causes the quantifiers to be ungreedy by default.
361 * Appending a ? turns back to greedy (!).
363 * - Added a new interceptor ijb-send-banner, which
364 * sends back the "Junkbuster" gif. Without imagelist or
365 * MSIE detection support, or if tinygif = 1, or the
366 * URL isn't recognized as an imageurl, a lame HTML
367 * explanation is sent instead.
369 * - Added new feature, which permits blocking remote
370 * script redirects and firing back a local redirect
372 * The feature is conditionally compiled, i.e. it
373 * can be disabled with --disable-fast-redirects,
374 * plus it must be activated by a "fast-redirects"
375 * line in the config file, has its own log level
376 * and of course wants to be displayed by show-proxy-args
377 * Note: Boy, all the #ifdefs in 1001 locations and
378 * all the fumbling with configure.in and acconfig.h
379 * were *way* more work than the feature itself :-(
381 * - Because a generic redirect template was needed for
382 * this, tinygif = 3 now uses the same.
384 * - Moved GIFs, and other static HTTP response templates
389 * - Removed some >400 CRs again (Jon, you really worked
392 * Revision 1.4 2001/05/21 19:32:54 jongfoster
393 * Added another #ifdef _WIN_CONSOLE
395 * Revision 1.3 2001/05/20 01:11:40 jongfoster
396 * Added support for LOG_LEVEL_FATAL
397 * Renamed LOG_LEVEL_FRC to LOG_LEVEL_FORCE,
398 * and LOG_LEVEL_REF to LOG_LEVEL_RE_FILTER
400 * Revision 1.2 2001/05/17 22:42:01 oes
401 * - Cleaned CRLF's from the sources and related files
402 * - Repaired logging for REF and FRC
404 * Revision 1.1.1.1 2001/05/15 13:58:51 oes
405 * Initial import of version 2.9.3 source tree
408 *********************************************************************/
417 #include "miscutil.h"
419 /* For gettimeofday() */
420 #include <sys/time.h>
422 #if !defined(_WIN32) && !defined(__OS2__)
424 #endif /* !defined(_WIN32) && !defined(__OS2__) */
436 #endif /* ndef _WIN_CONSOLE */
437 #endif /* def _WIN32 */
439 #define inline __inline
440 #endif /* def _MSC_VER */
443 #include <sys/socket.h> /* For sock_errno */
452 const char errlog_h_rcs[] = ERRLOG_H_VERSION;
456 * LOG_LEVEL_FATAL cannot be turned off. (There are
457 * some exceptional situations where we need to get a
458 * message to the user).
460 #define LOG_LEVEL_MINIMUM LOG_LEVEL_FATAL
462 /* where to log (default: stderr) */
463 static FILE *logfp = NULL;
465 /* logging detail level. XXX: stupid name. */
466 static int debug = (LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
468 /* static functions */
469 static void fatal_error(const char * error_message);
471 static char *w32_socket_strerr(int errcode, char *tmp_buf);
474 static char *os2_socket_strerr(int errcode, char *tmp_buf);
477 #ifdef MUTEX_LOCKS_AVAILABLE
478 static inline void lock_logfile(void)
480 privoxy_mutex_lock(&log_mutex);
482 static inline void unlock_logfile(void)
484 privoxy_mutex_unlock(&log_mutex);
486 static inline void lock_loginit(void)
488 privoxy_mutex_lock(&log_init_mutex);
490 static inline void unlock_loginit(void)
492 privoxy_mutex_unlock(&log_init_mutex);
494 #else /* ! MUTEX_LOCKS_AVAILABLE */
496 * FIXME we need a cross-platform locking mechanism.
497 * The locking/unlocking functions below should be
498 * fleshed out for non-pthread implementations.
500 static inline void lock_logfile() {}
501 static inline void unlock_logfile() {}
502 static inline void lock_loginit() {}
503 static inline void unlock_loginit() {}
506 /*********************************************************************
508 * Function : fatal_error
510 * Description : Displays a fatal error to standard error (or, on
511 * a WIN32 GUI, to a dialog box), and exits
512 * JunkBuster with status code 1.
515 * 1 : error_message = The error message to display.
517 * Returns : Does not return.
519 *********************************************************************/
520 static void fatal_error(const char * error_message)
522 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
523 MessageBox(g_hwndLogFrame, error_message, "Privoxy Error",
524 MB_OK | MB_ICONERROR | MB_TASKMODAL | MB_SETFOREGROUND | MB_TOPMOST);
526 /* Cleanup - remove taskbar icon etc. */
528 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
532 fputs(error_message, logfp);
546 /*********************************************************************
548 * Function : show_version
550 * Description : Logs the Privoxy version and the program name.
553 * 1 : prog_name = The program name.
557 *********************************************************************/
558 void show_version(const char *prog_name)
560 log_error(LOG_LEVEL_INFO, "Privoxy version " VERSION);
561 if (prog_name != NULL)
563 log_error(LOG_LEVEL_INFO, "Program name: %s", prog_name);
568 /*********************************************************************
570 * Function : init_log_module
572 * Description : Initializes the logging module to log to stderr.
573 * Can only be called while stderr hasn't been closed
574 * yet and is only supposed to be called once.
577 * 1 : prog_name = The program name.
581 *********************************************************************/
582 void init_log_module(void)
587 set_debug_level(debug);
591 /*********************************************************************
593 * Function : set_debug_level
595 * Description : Sets the debug level to the provided value
596 * plus LOG_LEVEL_MINIMUM.
598 * XXX: we should only use the LOG_LEVEL_MINIMUM
599 * until the first time the configuration file has
602 * Parameters : 1: debug_level = The debug level to set.
606 *********************************************************************/
607 void set_debug_level(int debug_level)
609 debug = debug_level | LOG_LEVEL_MINIMUM;
613 /*********************************************************************
615 * Function : disable_logging
617 * Description : Disables logging.
623 *********************************************************************/
624 void disable_logging(void)
628 log_error(LOG_LEVEL_INFO,
629 "No logfile configured. Please enable it before reporting any problems.");
638 /*********************************************************************
640 * Function : init_error_log
642 * Description : Initializes the logging module to log to a file.
644 * XXX: should be renamed.
647 * 1 : prog_name = The program name.
648 * 2 : logfname = The logfile to (re)open.
652 *********************************************************************/
653 void init_error_log(const char *prog_name, const char *logfname)
657 assert(NULL != logfname);
663 log_error(LOG_LEVEL_INFO, "(Re-)Opening logfile \'%s\'", logfname);
666 /* set the designated log file */
667 fp = fopen(logfname, "a");
668 if ((NULL == fp) && (logfp != NULL))
671 * Some platforms (like OS/2) don't allow us to open
672 * the same file twice, therefore we give it another
673 * shot after closing the old file descriptor first.
675 * We don't do it right away because it prevents us
676 * from logging the "can't open logfile" message to
679 * XXX: this is a lame workaround and once the next
680 * release is out we should stop bothering reopening
681 * the logfile unless we have to.
683 * Currently we reopen it every time the config file
684 * has been reloaded, but actually we only have to
685 * reopen it if the file name changed or if the
686 * configuration reloas was caused by a SIGHUP.
688 log_error(LOG_LEVEL_INFO, "Failed to reopen logfile: \'%s\'. "
689 "Retrying after closing the old file descriptor first. If that "
690 "doesn't work, Privoxy will exit without being able to log a message.",
696 fp = fopen(logfname, "a");
701 log_error(LOG_LEVEL_FATAL, "init_error_log(): can't open logfile: \'%s\'", logfname);
704 /* set logging to be completely unbuffered */
717 * Prevent the Windows GUI from showing the version two
718 * times in a row on startup. It already displayed the show_version()
719 * call from main() that other systems write to stderr.
721 * This means mingw32 users will never see the version in their
722 * log file, but I assume they wouldn't look for it there anyway
723 * and simply use the "Help/About Privoxy" menu.
725 show_version(prog_name);
726 #endif /* def unix */
730 } /* init_error_log */
733 /*********************************************************************
735 * Function : get_thread_id
737 * Description : Returns a number that is different for each thread.
739 * XXX: Should be moved elsewhere (miscutil.c?)
743 * Returns : thread_id
745 *********************************************************************/
746 static long get_thread_id(void)
748 long this_thread = 1; /* was: pthread_t this_thread;*/
752 APIRET ulrc; /* XXX: I have no clue what this does */
755 /* FIXME get current thread id */
756 #ifdef FEATURE_PTHREAD
757 this_thread = (long)pthread_self();
760 * Mac OSX (and perhaps other Mach instances) doesn't have a debuggable
761 * value at the first 4 bytes of pthread_self()'s return value, a pthread_t.
762 * pthread_t is supposed to be opaque... but it's fairly random, though, so
763 * we make it mostly presentable.
765 this_thread = abs(this_thread % 1000);
766 #endif /* def __MACH__ */
767 #elif defined(_WIN32)
768 this_thread = GetCurrentThreadId();
769 #elif defined(__OS2__)
770 ulrc = DosGetInfoBlocks(&ptib, NULL);
772 this_thread = ptib -> tib_ptib2 -> tib2_ultid;
773 #endif /* def FEATURE_PTHREAD */
779 /*********************************************************************
781 * Function : get_log_timestamp
783 * Description : Generates the time stamp for the log message prefix.
786 * 1 : buffer = Storage buffer
787 * 2 : buffer_size = Size of storage buffer
789 * Returns : Number of written characters or 0 for error.
791 *********************************************************************/
792 static inline size_t get_log_timestamp(char *buffer, size_t buffer_size)
797 struct timeval tv_now; /* XXX: stupid name */
799 int msecs_length = 0;
801 gettimeofday(&tv_now, NULL);
802 msecs = tv_now.tv_usec / 1000;
806 #ifdef HAVE_LOCALTIME_R
807 tm_now = *localtime_r(&now, &tm_now);
808 #elif FEATURE_PTHREAD
809 privoxy_mutex_lock(&localtime_mutex);
810 tm_now = *localtime(&now);
811 privoxy_mutex_unlock(&localtime_mutex);
813 tm_now = *localtime(&now);
816 length = strftime(buffer, buffer_size, "%b %d %H:%M:%S", &tm_now);
817 if (length > (size_t)0)
819 msecs_length = snprintf(buffer+length, buffer_size - length, ".%.3ld", msecs);
821 if (msecs_length > 0)
823 length += (size_t)msecs_length;
834 /*********************************************************************
836 * Function : get_clf_timestamp
838 * Description : Generates a Common Log Format time string.
841 * 1 : buffer = Storage buffer
842 * 2 : buffer_size = Size of storage buffer
844 * Returns : Number of written characters or 0 for error.
846 *********************************************************************/
847 static inline size_t get_clf_timestamp(char *buffer, size_t buffer_size)
850 * Complex because not all OSs have tm_gmtoff or
851 * the %z field in strftime()
856 #ifdef HAVE_LOCALTIME_R
865 gmt = *gmtime_r(&now, &gmt);
866 #elif FEATURE_PTHREAD
867 privoxy_mutex_lock(&gmtime_mutex);
869 privoxy_mutex_unlock(&gmtime_mutex);
873 #ifdef HAVE_LOCALTIME_R
874 tm_now = localtime_r(&now, &dummy);
875 #elif FEATURE_PTHREAD
876 privoxy_mutex_lock(&localtime_mutex);
877 tm_now = localtime(&now);
878 privoxy_mutex_unlock(&localtime_mutex);
880 tm_now = localtime(&now);
882 days = tm_now->tm_yday - gmt.tm_yday;
883 hrs = ((days < -1 ? 24 : 1 < days ? -24 : days * 24) + tm_now->tm_hour - gmt.tm_hour);
884 mins = hrs * 60 + tm_now->tm_min - gmt.tm_min;
886 length = strftime(buffer, buffer_size, "%d/%b/%Y:%H:%M:%S ", tm_now);
888 if (length > (size_t)0)
890 tz_length = snprintf(buffer+length, buffer_size-length,
891 "%+03d%02d", mins / 60, abs(mins) % 60);
895 length += (size_t)tz_length;
906 /*********************************************************************
908 * Function : get_log_level_string
910 * Description : Translates a numerical loglevel into a string.
913 * 1 : loglevel = LOG_LEVEL_FOO
915 * Returns : Log level string.
917 *********************************************************************/
918 static inline const char *get_log_level_string(int loglevel)
920 char *log_level_string = NULL;
922 assert(0 < loglevel);
926 case LOG_LEVEL_ERROR:
927 log_level_string = "Error";
929 case LOG_LEVEL_FATAL:
930 log_level_string = "Fatal error";
933 log_level_string = "Request";
935 case LOG_LEVEL_CONNECT:
936 log_level_string = "Connect";
939 log_level_string = "Writing";
941 case LOG_LEVEL_HEADER:
942 log_level_string = "Header";
945 log_level_string = "Info";
947 case LOG_LEVEL_RE_FILTER:
948 log_level_string = "Re-Filter";
950 #ifdef FEATURE_FORCE_LOAD
951 case LOG_LEVEL_FORCE:
952 log_level_string = "Force";
954 #endif /* def FEATURE_FORCE_LOAD */
955 #ifdef FEATURE_FAST_REDIRECTS
956 case LOG_LEVEL_REDIRECTS:
957 log_level_string = "Redirect";
959 #endif /* def FEATURE_FAST_REDIRECTS */
960 case LOG_LEVEL_DEANIMATE:
961 log_level_string = "Gif-Deanimate";
963 case LOG_LEVEL_CRUNCH:
964 log_level_string = "Crunch";
967 log_level_string = "CGI";
970 log_level_string = "Unknown log level";
973 assert(NULL != log_level_string);
975 return log_level_string;
979 /*********************************************************************
981 * Function : log_error
983 * Description : This is the error-reporting and logging function.
986 * 1 : loglevel = the type of message to be logged
987 * 2 : fmt = the main string we want logged, printf-like
988 * 3 : ... = arguments to be inserted in fmt (printf-like).
992 *********************************************************************/
993 void log_error(int loglevel, const char *fmt, ...)
997 static char *outbuf_save = NULL;
998 char tempbuf[BUFFER_SIZE];
1000 const char * src = fmt;
1004 * XXX: Make this a config option,
1005 * why else do we allocate instead of using
1008 size_t log_buffer_size = BUFFER_SIZE;
1010 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
1012 * Irrespective of debug setting, a GET/POST/CONNECT makes
1013 * the taskbar icon animate. (There is an option to disable
1014 * this but checking that is handled inside LogShowActivity()).
1016 if ((loglevel == LOG_LEVEL_GPC) || (loglevel == LOG_LEVEL_CRUNCH))
1020 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1023 * verify that the loglevel applies to current
1024 * settings and that logging is enabled.
1025 * Bail out otherwise.
1027 if ((0 == (loglevel & debug))
1033 if (loglevel == LOG_LEVEL_FATAL)
1035 fatal_error("Fatal error. You're not supposed to"
1036 "see this message. Please file a bug report.");
1041 thread_id = get_thread_id();
1042 get_log_timestamp(timestamp, sizeof(timestamp));
1044 /* protect the whole function because of the static buffer (outbuf) */
1047 if (NULL == outbuf_save)
1049 outbuf_save = (char*)zalloc(log_buffer_size + 1); /* +1 for paranoia */
1050 if (NULL == outbuf_save)
1052 snprintf(tempbuf, sizeof(tempbuf),
1053 "%s %08lx Fatal error: Out of memory in log_error().",
1054 timestamp, thread_id);
1055 fatal_error(tempbuf); /* Exit */
1058 outbuf = outbuf_save;
1061 * Memsetting the whole buffer to zero (in theory)
1062 * makes things easier later on.
1064 memset(outbuf, 0, log_buffer_size);
1066 /* Add prefix for everything but Common Log Format messages */
1067 if (loglevel != LOG_LEVEL_CLF)
1069 length = (size_t)snprintf(outbuf, log_buffer_size, "%s %08lx %s: ",
1070 timestamp, thread_id, get_log_level_string(loglevel));
1073 /* get ready to scan var. args. */
1076 /* build formatted message from fmt and var-args */
1077 while ((*src) && (length < log_buffer_size-2))
1079 const char *sval = NULL; /* %N string */
1080 int ival; /* %N string length or an error code */
1081 unsigned uval; /* %u value */
1082 long lval; /* %l value */
1083 unsigned long ulval; /* %ul value */
1085 const char *format_string = tempbuf;
1090 outbuf[length++] = ch;
1092 * XXX: Only necessary on platforms where multiple threads
1093 * can write to the buffer at the same time because we
1094 * don't support mutexes (OS/2 for example).
1096 outbuf[length] = '\0';
1099 outbuf[length] = '\0';
1107 ival = va_arg( ap, int );
1108 snprintf(tempbuf, sizeof(tempbuf), "%d", ival);
1111 uval = va_arg( ap, unsigned );
1112 snprintf(tempbuf, sizeof(tempbuf), "%u", uval);
1115 /* this is a modifier that must be followed by u or d */
1119 lval = va_arg( ap, long );
1120 snprintf(tempbuf, sizeof(tempbuf), "%ld", lval);
1124 ulval = va_arg( ap, unsigned long );
1125 snprintf(tempbuf, sizeof(tempbuf), "%lu", ulval);
1129 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1130 loglevel = LOG_LEVEL_FATAL;
1135 * Note that char paramaters are converted to int, so we need to
1136 * pass "int" to va_arg. (See K&R, 2nd ed, section A7.3.2, page 202)
1138 tempbuf[0] = (char) va_arg(ap, int);
1142 format_string = va_arg(ap, char *);
1143 if (format_string == NULL)
1145 format_string = "[null]";
1150 * Non-standard: Print a counted unterminated string.
1151 * Takes 2 parameters: int length, const char * string.
1153 ival = va_arg(ap, int);
1154 sval = va_arg(ap, char *);
1157 format_string = "[null]";
1163 /* That's ok (but stupid) */
1169 * That's not ok (and even more stupid)
1172 format_string = "[counted string lenght < 0]";
1175 else if ((size_t)ival >= sizeof(tempbuf))
1178 * String is too long, copy as much as possible.
1179 * It will be further truncated later.
1181 memcpy(tempbuf, sval, sizeof(tempbuf)-1);
1182 tempbuf[sizeof(tempbuf)-1] = '\0';
1186 memcpy(tempbuf, sval, (size_t) ival);
1187 tempbuf[ival] = '\0';
1191 /* Non-standard: Print error code from errno */
1193 ival = WSAGetLastError();
1194 format_string = w32_socket_strerr(ival, tempbuf);
1196 ival = sock_errno();
1199 format_string = os2_socket_strerr(ival, tempbuf);
1204 format_string = strerror(ival);
1206 #else /* ifndef _WIN32 */
1208 #ifdef HAVE_STRERROR
1209 format_string = strerror(ival);
1210 #else /* ifndef HAVE_STRERROR */
1211 format_string = NULL;
1212 #endif /* ndef HAVE_STRERROR */
1215 snprintf(tempbuf, sizeof(tempbuf), "(errno = %d)", ival);
1217 #endif /* ndef _WIN32 */
1220 /* Non-standard: Print a Common Log File timestamp */
1221 get_clf_timestamp(tempbuf, sizeof(tempbuf));
1224 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1225 loglevel = LOG_LEVEL_FATAL;
1229 assert(length < log_buffer_size);
1230 length += strlcpy(outbuf + length, format_string, log_buffer_size - length);
1232 if (length >= log_buffer_size-2)
1234 static char warning[] = "... [too long, truncated]";
1236 length = log_buffer_size - sizeof(warning) - 1;
1237 length += strlcpy(outbuf + length, warning, log_buffer_size - length);
1238 assert(length < log_buffer_size);
1242 } /* for( p ... ) */
1244 /* done with var. args */
1247 assert(length < log_buffer_size);
1248 length += strlcpy(outbuf + length, "\n", log_buffer_size - length);
1250 /* Some sanity checks */
1251 if ((length >= log_buffer_size)
1252 || (outbuf[log_buffer_size-1] != '\0')
1253 || (outbuf[log_buffer_size] != '\0')
1256 /* Repeat as assertions */
1257 assert(length < log_buffer_size);
1258 assert(outbuf[log_buffer_size-1] == '\0');
1260 * outbuf's real size is log_buffer_size+1,
1261 * so while this looks like an off-by-one,
1262 * we're only checking our paranoia byte.
1264 assert(outbuf[log_buffer_size] == '\0');
1266 snprintf(outbuf, log_buffer_size,
1267 "%s %08lx Fatal error: log_error()'s sanity checks failed."
1268 "length: %d. Exiting.",
1269 timestamp, thread_id, (int)length);
1270 loglevel = LOG_LEVEL_FATAL;
1275 * On Windows this is acceptable in case
1276 * we are logging to the GUI window only.
1278 assert(NULL != logfp);
1281 if (loglevel == LOG_LEVEL_FATAL)
1283 fatal_error(outbuf_save);
1284 /* Never get here */
1288 fputs(outbuf_save, logfp);
1291 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
1292 /* Write to display */
1293 LogPutString(outbuf_save);
1294 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1301 /*********************************************************************
1303 * Function : jb_err_to_string
1305 * Description : Translates JB_ERR_FOO codes into strings.
1307 * XXX: the type of error codes is jb_err
1308 * but the typedef'inition is currently not
1309 * visible to all files that include errlog.h.
1312 * 1 : error = a valid jb_err code
1314 * Returns : A string with the jb_err translation
1316 *********************************************************************/
1317 const char *jb_err_to_string(int error)
1322 return "Success, no error";
1324 return "Out of memory";
1325 case JB_ERR_CGI_PARAMS:
1326 return "Missing or corrupt CGI parameters";
1328 return "Error opening, reading or writing a file";
1330 return "Parse error";
1331 case JB_ERR_MODIFIED:
1332 return "File has been modified outside of the CGI actions editor.";
1333 case JB_ERR_COMPRESS:
1334 return "(De)compression failure";
1337 return "Unknown error";
1340 return "Internal error";
1344 /*********************************************************************
1346 * Function : w32_socket_strerr
1348 * Description : Translate the return value from WSAGetLastError()
1352 * 1 : errcode = The return value from WSAGetLastError().
1353 * 2 : tmp_buf = A temporary buffer that might be used to
1356 * Returns : String representing the error code. This may be
1357 * a global string constant or a string stored in
1360 *********************************************************************/
1361 static char *w32_socket_strerr(int errcode, char *tmp_buf)
1363 #define TEXT_FOR_ERROR(code,text) \
1364 if (errcode == code) \
1366 return #code " - " text; \
1369 TEXT_FOR_ERROR(WSAEACCES, "Permission denied")
1370 TEXT_FOR_ERROR(WSAEADDRINUSE, "Address already in use.")
1371 TEXT_FOR_ERROR(WSAEADDRNOTAVAIL, "Cannot assign requested address.");
1372 TEXT_FOR_ERROR(WSAEAFNOSUPPORT, "Address family not supported by protocol family.");
1373 TEXT_FOR_ERROR(WSAEALREADY, "Operation already in progress.");
1374 TEXT_FOR_ERROR(WSAECONNABORTED, "Software caused connection abort.");
1375 TEXT_FOR_ERROR(WSAECONNREFUSED, "Connection refused.");
1376 TEXT_FOR_ERROR(WSAECONNRESET, "Connection reset by peer.");
1377 TEXT_FOR_ERROR(WSAEDESTADDRREQ, "Destination address required.");
1378 TEXT_FOR_ERROR(WSAEFAULT, "Bad address.");
1379 TEXT_FOR_ERROR(WSAEHOSTDOWN, "Host is down.");
1380 TEXT_FOR_ERROR(WSAEHOSTUNREACH, "No route to host.");
1381 TEXT_FOR_ERROR(WSAEINPROGRESS, "Operation now in progress.");
1382 TEXT_FOR_ERROR(WSAEINTR, "Interrupted function call.");
1383 TEXT_FOR_ERROR(WSAEINVAL, "Invalid argument.");
1384 TEXT_FOR_ERROR(WSAEISCONN, "Socket is already connected.");
1385 TEXT_FOR_ERROR(WSAEMFILE, "Too many open sockets.");
1386 TEXT_FOR_ERROR(WSAEMSGSIZE, "Message too long.");
1387 TEXT_FOR_ERROR(WSAENETDOWN, "Network is down.");
1388 TEXT_FOR_ERROR(WSAENETRESET, "Network dropped connection on reset.");
1389 TEXT_FOR_ERROR(WSAENETUNREACH, "Network is unreachable.");
1390 TEXT_FOR_ERROR(WSAENOBUFS, "No buffer space available.");
1391 TEXT_FOR_ERROR(WSAENOPROTOOPT, "Bad protocol option.");
1392 TEXT_FOR_ERROR(WSAENOTCONN, "Socket is not connected.");
1393 TEXT_FOR_ERROR(WSAENOTSOCK, "Socket operation on non-socket.");
1394 TEXT_FOR_ERROR(WSAEOPNOTSUPP, "Operation not supported.");
1395 TEXT_FOR_ERROR(WSAEPFNOSUPPORT, "Protocol family not supported.");
1396 TEXT_FOR_ERROR(WSAEPROCLIM, "Too many processes.");
1397 TEXT_FOR_ERROR(WSAEPROTONOSUPPORT, "Protocol not supported.");
1398 TEXT_FOR_ERROR(WSAEPROTOTYPE, "Protocol wrong type for socket.");
1399 TEXT_FOR_ERROR(WSAESHUTDOWN, "Cannot send after socket shutdown.");
1400 TEXT_FOR_ERROR(WSAESOCKTNOSUPPORT, "Socket type not supported.");
1401 TEXT_FOR_ERROR(WSAETIMEDOUT, "Connection timed out.");
1402 TEXT_FOR_ERROR(WSAEWOULDBLOCK, "Resource temporarily unavailable.");
1403 TEXT_FOR_ERROR(WSAHOST_NOT_FOUND, "Host not found.");
1404 TEXT_FOR_ERROR(WSANOTINITIALISED, "Successful WSAStartup not yet performed.");
1405 TEXT_FOR_ERROR(WSANO_DATA, "Valid name, no data record of requested type.");
1406 TEXT_FOR_ERROR(WSANO_RECOVERY, "This is a non-recoverable error.");
1407 TEXT_FOR_ERROR(WSASYSNOTREADY, "Network subsystem is unavailable.");
1408 TEXT_FOR_ERROR(WSATRY_AGAIN, "Non-authoritative host not found.");
1409 TEXT_FOR_ERROR(WSAVERNOTSUPPORTED, "WINSOCK.DLL version out of range.");
1410 TEXT_FOR_ERROR(WSAEDISCON, "Graceful shutdown in progress.");
1412 * The following error codes are documented in the Microsoft WinSock
1413 * reference guide, but don't actually exist.
1415 * TEXT_FOR_ERROR(WSA_INVALID_HANDLE, "Specified event object handle is invalid.");
1416 * TEXT_FOR_ERROR(WSA_INVALID_PARAMETER, "One or more parameters are invalid.");
1417 * TEXT_FOR_ERROR(WSAINVALIDPROCTABLE, "Invalid procedure table from service provider.");
1418 * TEXT_FOR_ERROR(WSAINVALIDPROVIDER, "Invalid service provider version number.");
1419 * TEXT_FOR_ERROR(WSA_IO_PENDING, "Overlapped operations will complete later.");
1420 * TEXT_FOR_ERROR(WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state.");
1421 * TEXT_FOR_ERROR(WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available.");
1422 * TEXT_FOR_ERROR(WSAPROVIDERFAILEDINIT, "Unable to initialize a service provider.");
1423 * TEXT_FOR_ERROR(WSASYSCALLFAILURE, "System call failure.");
1424 * TEXT_FOR_ERROR(WSA_OPERATION_ABORTED, "Overlapped operation aborted.");
1427 sprintf(tmp_buf, "(error number %d)", errcode);
1430 #endif /* def _WIN32 */
1434 /*********************************************************************
1436 * Function : os2_socket_strerr
1438 * Description : Translate the return value from sock_errno()
1442 * 1 : errcode = The return value from sock_errno().
1443 * 2 : tmp_buf = A temporary buffer that might be used to
1446 * Returns : String representing the error code. This may be
1447 * a global string constant or a string stored in
1450 *********************************************************************/
1451 static char *os2_socket_strerr(int errcode, char *tmp_buf)
1453 #define TEXT_FOR_ERROR(code,text) \
1454 if (errcode == code) \
1456 return #code " - " text; \
1459 TEXT_FOR_ERROR(SOCEPERM , "Not owner.")
1460 TEXT_FOR_ERROR(SOCESRCH , "No such process.")
1461 TEXT_FOR_ERROR(SOCEINTR , "Interrupted system call.")
1462 TEXT_FOR_ERROR(SOCENXIO , "No such device or address.")
1463 TEXT_FOR_ERROR(SOCEBADF , "Bad file number.")
1464 TEXT_FOR_ERROR(SOCEACCES , "Permission denied.")
1465 TEXT_FOR_ERROR(SOCEFAULT , "Bad address.")
1466 TEXT_FOR_ERROR(SOCEINVAL , "Invalid argument.")
1467 TEXT_FOR_ERROR(SOCEMFILE , "Too many open files.")
1468 TEXT_FOR_ERROR(SOCEPIPE , "Broken pipe.")
1469 TEXT_FOR_ERROR(SOCEWOULDBLOCK , "Operation would block.")
1470 TEXT_FOR_ERROR(SOCEINPROGRESS , "Operation now in progress.")
1471 TEXT_FOR_ERROR(SOCEALREADY , "Operation already in progress.")
1472 TEXT_FOR_ERROR(SOCENOTSOCK , "Socket operation on non-socket.")
1473 TEXT_FOR_ERROR(SOCEDESTADDRREQ , "Destination address required.")
1474 TEXT_FOR_ERROR(SOCEMSGSIZE , "Message too long.")
1475 TEXT_FOR_ERROR(SOCEPROTOTYPE , "Protocol wrong type for socket.")
1476 TEXT_FOR_ERROR(SOCENOPROTOOPT , "Protocol not available.")
1477 TEXT_FOR_ERROR(SOCEPROTONOSUPPORT, "Protocol not supported.")
1478 TEXT_FOR_ERROR(SOCESOCKTNOSUPPORT, "Socket type not supported.")
1479 TEXT_FOR_ERROR(SOCEOPNOTSUPP , "Operation not supported.")
1480 TEXT_FOR_ERROR(SOCEPFNOSUPPORT , "Protocol family not supported.")
1481 TEXT_FOR_ERROR(SOCEAFNOSUPPORT , "Address family not supported by protocol family.")
1482 TEXT_FOR_ERROR(SOCEADDRINUSE , "Address already in use.")
1483 TEXT_FOR_ERROR(SOCEADDRNOTAVAIL , "Can't assign requested address.")
1484 TEXT_FOR_ERROR(SOCENETDOWN , "Network is down.")
1485 TEXT_FOR_ERROR(SOCENETUNREACH , "Network is unreachable.")
1486 TEXT_FOR_ERROR(SOCENETRESET , "Network dropped connection on reset.")
1487 TEXT_FOR_ERROR(SOCECONNABORTED , "Software caused connection abort.")
1488 TEXT_FOR_ERROR(SOCECONNRESET , "Connection reset by peer.")
1489 TEXT_FOR_ERROR(SOCENOBUFS , "No buffer space available.")
1490 TEXT_FOR_ERROR(SOCEISCONN , "Socket is already connected.")
1491 TEXT_FOR_ERROR(SOCENOTCONN , "Socket is not connected.")
1492 TEXT_FOR_ERROR(SOCESHUTDOWN , "Can't send after socket shutdown.")
1493 TEXT_FOR_ERROR(SOCETOOMANYREFS , "Too many references: can't splice.")
1494 TEXT_FOR_ERROR(SOCETIMEDOUT , "Operation timed out.")
1495 TEXT_FOR_ERROR(SOCECONNREFUSED , "Connection refused.")
1496 TEXT_FOR_ERROR(SOCELOOP , "Too many levels of symbolic links.")
1497 TEXT_FOR_ERROR(SOCENAMETOOLONG , "File name too long.")
1498 TEXT_FOR_ERROR(SOCEHOSTDOWN , "Host is down.")
1499 TEXT_FOR_ERROR(SOCEHOSTUNREACH , "No route to host.")
1500 TEXT_FOR_ERROR(SOCENOTEMPTY , "Directory not empty.")
1501 TEXT_FOR_ERROR(SOCEOS2ERR , "OS/2 Error.")
1503 sprintf(tmp_buf, "(error number %d)", errcode);
1506 #endif /* def __OS2__ */