1 const char errlog_rcs[] = "$Id: errlog.c,v 1.81 2008/11/23 15:59:27 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) 2001-2008 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 1.81 2008/11/23 15:59:27 fabiankeil
37 * - Update copyright range.
38 * - Remove stray line breaks in a log message
39 * nobody is supposed to see anyway.
41 * Revision 1.80 2008/11/23 15:49:49 fabiankeil
42 * In log_error(), don't surround the thread id with "Privoxy(" and ")".
44 * Revision 1.79 2008/10/20 17:09:25 fabiankeil
45 * Update init_error_log() description to match reality.
47 * Revision 1.78 2008/09/07 16:59:31 fabiankeil
48 * Update a comment to reflect that we
49 * have mutex support on mingw32 now.
51 * Revision 1.77 2008/09/07 12:43:44 fabiankeil
52 * Move the LogPutString() call in log_error() into the locked
53 * region so the Windows GUI log is consistent with the logfile.
55 * Revision 1.76 2008/09/07 12:35:05 fabiankeil
56 * Add mutex lock support for _WIN32.
58 * Revision 1.75 2008/09/04 08:13:58 fabiankeil
59 * Prepare for critical sections on Windows by adding a
60 * layer of indirection before the pthread mutex functions.
62 * Revision 1.74 2008/08/06 18:33:36 fabiankeil
63 * If the "close fd first" workaround doesn't work,
64 * the fatal error message will be lost, so we better
65 * explain the consequences while we still can.
67 * Revision 1.73 2008/08/04 19:06:55 fabiankeil
68 * Add a lame workaround for the "can't open an already open
69 * logfile on OS/2" problem reported by Maynard in #2028842
70 * and describe what a real solution would look like.
72 * Revision 1.72 2008/07/27 12:04:28 fabiankeil
75 * Revision 1.71 2008/06/28 17:17:15 fabiankeil
76 * Remove another stray semicolon.
78 * Revision 1.70 2008/06/28 17:10:29 fabiankeil
79 * Remove stray semicolon in get_log_timestamp().
80 * Reported by Jochen Voss in #2005221.
82 * Revision 1.69 2008/05/30 15:55:25 fabiankeil
83 * Declare variable "debug" static and complain about its name.
85 * Revision 1.68 2008/04/27 16:50:46 fabiankeil
86 * Remove an incorrect assertion. The value of debug may change if
87 * the configuration is reloaded in another thread. While we could
88 * cache the initial value, the assertion doesn't seem worth it.
90 * Revision 1.67 2008/03/27 18:27:23 fabiankeil
91 * Remove kill-popups action.
93 * Revision 1.66 2008/01/31 15:38:14 fabiankeil
94 * - Make the logfp assertion more strict. As of 1.63, the "||" could
95 * have been an "&&", which means we can use two separate assertions
96 * and skip on of them on Windows.
97 * - Break a long commit message line in two.
99 * Revision 1.65 2008/01/31 14:44:33 fabiankeil
100 * Use (a != b) instead of !(a == b) so the sanity check looks less insane.
102 * Revision 1.64 2008/01/21 18:56:46 david__schmidt
103 * Swap #def from negative to positive, re-joined it so it didn't
104 * span an assertion (compilation failure on OS/2)
106 * Revision 1.63 2007/12/15 19:49:32 fabiankeil
107 * Stop overloading logfile to control the mingw32 log window as well.
108 * It's no longer necessary now that we disable all debug lines by default
109 * and at least one user perceived it as a regression (added in 1.55).
111 * Revision 1.62 2007/11/30 15:33:46 fabiankeil
112 * Unbreak LOG_LEVEL_FATAL. It wasn't fatal with logging disabled
113 * and on mingw32 fatal log messages didn't end up in the log file.
115 * Revision 1.61 2007/11/04 19:03:01 fabiankeil
116 * Fix another deadlock Hal spotted and that mysteriously didn't affect FreeBSD.
118 * Revision 1.60 2007/11/03 19:03:31 fabiankeil
119 * - Prevent the Windows GUI from showing the version two times in a row.
120 * - Stop using the imperative in the "(Re-)Open logfile" message.
121 * - Ditch the "Switching to daemon mode" message as the detection
122 * whether or not we're already in daemon mode doesn't actually work.
124 * Revision 1.59 2007/11/01 12:50:56 fabiankeil
125 * Here's looking at you, deadlock.
127 * Revision 1.58 2007/10/28 19:04:21 fabiankeil
128 * Don't mention daemon mode in "Logging disabled" message. Some
129 * platforms call it differently and it's not really relevant anyway.
131 * Revision 1.57 2007/10/27 13:02:26 fabiankeil
132 * Relocate daemon-mode-related log messages to make sure
133 * they aren't shown again in case of configuration reloads.
135 * Revision 1.56 2007/10/14 14:26:56 fabiankeil
136 * Remove the old log_error() version.
138 * Revision 1.55 2007/10/14 14:12:41 fabiankeil
139 * When in daemon mode, close stderr after the configuration file has been
140 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
142 * Revision 1.54 2007/09/22 16:15:34 fabiankeil
143 * - Let it compile with pcc.
144 * - Move our includes below system includes to prevent macro conflicts.
146 * Revision 1.53 2007/08/05 13:53:14 fabiankeil
147 * #1763173 from Stefan Huehner: declare some more functions
148 * static and use void instead of empty parameter lists.
150 * Revision 1.52 2007/07/14 07:28:47 fabiankeil
151 * Add translation function for JB_ERR_FOO codes.
153 * Revision 1.51 2007/05/11 11:51:34 fabiankeil
154 * Fix a type mismatch warning.
156 * Revision 1.50 2007/04/11 10:55:44 fabiankeil
157 * Enforce some assertions that could be triggered
158 * on mingw32 and other systems where we use threads
161 * Revision 1.49 2007/04/08 16:44:15 fabiankeil
162 * We need <sys/time.h> for gettimeofday(), not <time.h>.
164 * Revision 1.48 2007/03/31 13:33:28 fabiankeil
165 * Add alternative log_error() with timestamps
166 * that contain milliseconds and without using
167 * strcpy(), strcat() or sprintf().
169 * Revision 1.47 2006/11/28 15:25:15 fabiankeil
170 * Only unlink the pidfile if it's actually used.
172 * Revision 1.46 2006/11/13 19:05:51 fabiankeil
173 * Make pthread mutex locking more generic. Instead of
174 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
175 * and use mutex locking unless there is an _r function
176 * available. Better safe than sorry.
178 * Fixes "./configure --disable-pthread" and should result
179 * in less threading-related problems on pthread-using platforms,
180 * but it still doesn't fix BR#1122404.
182 * Revision 1.45 2006/08/21 11:15:54 david__schmidt
183 * MS Visual C++ build updates
185 * Revision 1.44 2006/08/18 16:03:16 david__schmidt
186 * Tweak for OS/2 build happiness.
188 * Revision 1.43 2006/08/03 02:46:41 david__schmidt
189 * Incorporate Fabian Keil's patch work:
190 * http://www.fabiankeil.de/sourcecode/privoxy/
192 * Revision 1.42 2006/07/18 14:48:46 david__schmidt
193 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
194 * with what was really the latest development (the v_3_0_branch branch)
196 * Revision 1.40.2.4 2005/04/03 20:10:50 david__schmidt
197 * Thanks to Jindrich Makovicka for a race condition fix for the log
198 * file. The race condition remains for non-pthread implementations.
199 * Reference patch #1175720.
201 * Revision 1.40.2.3 2003/03/07 03:41:04 david__schmidt
202 * Wrapping all *_r functions (the non-_r versions of them) with mutex
203 * semaphores for OSX. Hopefully this will take care of all of those pesky
206 * Revision 1.40.2.2 2002/09/28 00:30:57 david__schmidt
207 * Update error logging to give sane values for thread IDs on Mach kernels.
208 * It's still a hack, but at least it looks farily normal. We print the
209 * absolute value of the first 4 bytes of the pthread_t modded with 1000.
211 * Revision 1.40.2.1 2002/09/25 12:47:42 oes
212 * Make log_error safe against NULL string arguments
214 * Revision 1.40 2002/05/22 01:27:27 david__schmidt
216 * Add os2_socket_strerr mirroring w32_socket_strerr.
218 * Revision 1.39 2002/04/03 17:15:27 gliptak
219 * zero padding thread ids in log
221 * Revision 1.38 2002/03/31 17:18:59 jongfoster
222 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
224 * Revision 1.37 2002/03/27 14:32:43 david__schmidt
225 * More compiler warning message maintenance
227 * Revision 1.36 2002/03/26 22:29:54 swa
228 * we have a new homepage!
230 * Revision 1.35 2002/03/24 15:23:33 jongfoster
233 * Revision 1.34 2002/03/24 13:25:43 swa
234 * name change related issues
236 * Revision 1.33 2002/03/13 00:27:04 jongfoster
239 * Revision 1.32 2002/03/07 03:46:17 oes
240 * Fixed compiler warnings
242 * Revision 1.31 2002/03/06 23:02:57 jongfoster
245 * Revision 1.30 2002/03/05 22:43:45 david__schmidt
246 * - Better error reporting on OS/2
247 * - Fix double-slash comment (oops)
249 * Revision 1.29 2002/03/04 23:45:13 jongfoster
250 * Printing thread ID if using Win32 native threads
252 * Revision 1.28 2002/03/04 17:59:59 oes
253 * Deleted deletePidFile(), cosmetics
255 * Revision 1.27 2002/03/04 02:08:01 david__schmidt
256 * Enable web editing of actions file on OS/2 (it had been broken all this time!)
258 * Revision 1.26 2002/01/09 19:05:45 steudten
259 * Fix big memory leak.
261 * Revision 1.25 2002/01/09 14:32:08 oes
262 * Added support for gmtime_r and localtime_r.
264 * Revision 1.24 2001/12/30 14:07:32 steudten
265 * - Add signal handling (unix)
266 * - Add SIGHUP handler (unix)
267 * - Add creation of pidfile (unix)
268 * - Add action 'top' in rc file (RH)
269 * - Add entry 'SIGNALS' to manpage
270 * - Add exit message to logfile (unix)
272 * Revision 1.23 2001/11/07 00:02:13 steudten
273 * Add line number in error output for lineparsing for
274 * actionsfile and configfile.
275 * Special handling for CLF added.
277 * Revision 1.22 2001/11/05 23:43:05 steudten
278 * Add time+date to log files.
280 * Revision 1.21 2001/10/25 03:40:47 david__schmidt
281 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
282 * threads to call select() simultaneously. So, it's time to do a real, live,
283 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
284 * (native). Both versions will work, but using __OS2__ offers multi-threading.
286 * Revision 1.20 2001/09/16 23:04:34 jongfoster
289 * Revision 1.19 2001/09/13 20:08:06 jongfoster
290 * Adding support for LOG_LEVEL_CGI
292 * Revision 1.18 2001/09/10 11:27:24 oes
293 * Declaration of w32_socket_strerr now conditional
295 * Revision 1.17 2001/09/10 10:17:13 oes
296 * Removed unused variable; Fixed sprintf format
298 * Revision 1.16 2001/07/30 22:08:36 jongfoster
299 * Tidying up #defines:
300 * - All feature #defines are now of the form FEATURE_xxx
301 * - Permanently turned off WIN_GUI_EDIT
302 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
304 * Revision 1.15 2001/07/29 17:41:10 jongfoster
305 * Now prints thread ID for each message (pthreads only)
307 * Revision 1.14 2001/07/19 19:03:48 haroon
308 * - Added case for LOG_LEVEL_POPUPS
310 * Revision 1.13 2001/07/13 13:58:58 oes
311 * - Added case for LOG_LEVEL_DEANIMATE
312 * - Removed all #ifdef PCRS
314 * Revision 1.12 2001/06/09 10:55:28 jongfoster
315 * Changing BUFSIZ ==> BUFFER_SIZE
317 * Revision 1.11 2001/06/01 18:14:49 jongfoster
318 * Changing the calls to strerr() to check HAVE_STRERR (which is defined
319 * in config.h if appropriate) rather than the NO_STRERR macro.
321 * Revision 1.10 2001/05/29 11:52:21 oes
322 * Conditional compilation of w32_socket_error
324 * Revision 1.9 2001/05/28 16:15:17 jongfoster
325 * Improved reporting of errors under Win32.
327 * Revision 1.8 2001/05/26 17:25:14 jongfoster
328 * Added support for CLF (Common Log Format) and fixed LOG_LEVEL_LOG
330 * Revision 1.7 2001/05/26 15:21:28 jongfoster
331 * Activity animation in Win32 GUI now works even if debug==0
333 * Revision 1.6 2001/05/25 21:55:08 jongfoster
334 * Now cleans up properly on FATAL (removes taskbar icon etc)
336 * Revision 1.5 2001/05/22 18:46:04 oes
338 * - Enabled filtering banners by size rather than URL
339 * by adding patterns that replace all standard banner
340 * sizes with the "Junkbuster" gif to the re_filterfile
342 * - Enabled filtering WebBugs by providing a pattern
343 * which kills all 1x1 images
345 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
346 * which is selected by the (nonstandard and therefore
347 * capital) letter 'U' in the option string.
348 * It causes the quantifiers to be ungreedy by default.
349 * Appending a ? turns back to greedy (!).
351 * - Added a new interceptor ijb-send-banner, which
352 * sends back the "Junkbuster" gif. Without imagelist or
353 * MSIE detection support, or if tinygif = 1, or the
354 * URL isn't recognized as an imageurl, a lame HTML
355 * explanation is sent instead.
357 * - Added new feature, which permits blocking remote
358 * script redirects and firing back a local redirect
360 * The feature is conditionally compiled, i.e. it
361 * can be disabled with --disable-fast-redirects,
362 * plus it must be activated by a "fast-redirects"
363 * line in the config file, has its own log level
364 * and of course wants to be displayed by show-proxy-args
365 * Note: Boy, all the #ifdefs in 1001 locations and
366 * all the fumbling with configure.in and acconfig.h
367 * were *way* more work than the feature itself :-(
369 * - Because a generic redirect template was needed for
370 * this, tinygif = 3 now uses the same.
372 * - Moved GIFs, and other static HTTP response templates
377 * - Removed some >400 CRs again (Jon, you really worked
380 * Revision 1.4 2001/05/21 19:32:54 jongfoster
381 * Added another #ifdef _WIN_CONSOLE
383 * Revision 1.3 2001/05/20 01:11:40 jongfoster
384 * Added support for LOG_LEVEL_FATAL
385 * Renamed LOG_LEVEL_FRC to LOG_LEVEL_FORCE,
386 * and LOG_LEVEL_REF to LOG_LEVEL_RE_FILTER
388 * Revision 1.2 2001/05/17 22:42:01 oes
389 * - Cleaned CRLF's from the sources and related files
390 * - Repaired logging for REF and FRC
392 * Revision 1.1.1.1 2001/05/15 13:58:51 oes
393 * Initial import of version 2.9.3 source tree
396 *********************************************************************/
405 #include "miscutil.h"
407 /* For gettimeofday() */
408 #include <sys/time.h>
410 #if !defined(_WIN32) && !defined(__OS2__)
412 #endif /* !defined(_WIN32) && !defined(__OS2__) */
424 #endif /* ndef _WIN_CONSOLE */
425 #endif /* def _WIN32 */
427 #define inline __inline
428 #endif /* def _MSC_VER */
431 #include <sys/socket.h> /* For sock_errno */
440 const char errlog_h_rcs[] = ERRLOG_H_VERSION;
444 * LOG_LEVEL_FATAL cannot be turned off. (There are
445 * some exceptional situations where we need to get a
446 * message to the user).
448 #define LOG_LEVEL_MINIMUM LOG_LEVEL_FATAL
450 /* where to log (default: stderr) */
451 static FILE *logfp = NULL;
453 /* logging detail level. XXX: stupid name. */
454 static int debug = (LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
456 /* static functions */
457 static void fatal_error(const char * error_message);
459 static char *w32_socket_strerr(int errcode, char *tmp_buf);
462 static char *os2_socket_strerr(int errcode, char *tmp_buf);
465 #ifdef MUTEX_LOCKS_AVAILABLE
466 static inline void lock_logfile(void)
468 privoxy_mutex_lock(&log_mutex);
470 static inline void unlock_logfile(void)
472 privoxy_mutex_unlock(&log_mutex);
474 static inline void lock_loginit(void)
476 privoxy_mutex_lock(&log_init_mutex);
478 static inline void unlock_loginit(void)
480 privoxy_mutex_unlock(&log_init_mutex);
482 #else /* ! MUTEX_LOCKS_AVAILABLE */
484 * FIXME we need a cross-platform locking mechanism.
485 * The locking/unlocking functions below should be
486 * fleshed out for non-pthread implementations.
488 static inline void lock_logfile() {}
489 static inline void unlock_logfile() {}
490 static inline void lock_loginit() {}
491 static inline void unlock_loginit() {}
494 /*********************************************************************
496 * Function : fatal_error
498 * Description : Displays a fatal error to standard error (or, on
499 * a WIN32 GUI, to a dialog box), and exits
500 * JunkBuster with status code 1.
503 * 1 : error_message = The error message to display.
505 * Returns : Does not return.
507 *********************************************************************/
508 static void fatal_error(const char * error_message)
510 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
511 MessageBox(g_hwndLogFrame, error_message, "Privoxy Error",
512 MB_OK | MB_ICONERROR | MB_TASKMODAL | MB_SETFOREGROUND | MB_TOPMOST);
514 /* Cleanup - remove taskbar icon etc. */
516 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
520 fputs(error_message, logfp);
534 /*********************************************************************
536 * Function : show_version
538 * Description : Logs the Privoxy version and the program name.
541 * 1 : prog_name = The program name.
545 *********************************************************************/
546 static void show_version(const char *prog_name)
548 log_error(LOG_LEVEL_INFO, "Privoxy version " VERSION);
549 if (prog_name != NULL)
551 log_error(LOG_LEVEL_INFO, "Program name: %s", prog_name);
556 /*********************************************************************
558 * Function : init_log_module
560 * Description : Initializes the logging module to log to stderr.
561 * Can only be called while stderr hasn't been closed
562 * yet and is only supposed to be called once.
565 * 1 : prog_name = The program name.
569 *********************************************************************/
570 void init_log_module(const char *prog_name)
575 set_debug_level(debug);
576 show_version(prog_name);
580 /*********************************************************************
582 * Function : set_debug_level
584 * Description : Sets the debug level to the provided value
585 * plus LOG_LEVEL_MINIMUM.
587 * XXX: we should only use the LOG_LEVEL_MINIMUM
588 * until the first time the configuration file has
591 * Parameters : 1: debug_level = The debug level to set.
595 *********************************************************************/
596 void set_debug_level(int debug_level)
598 debug = debug_level | LOG_LEVEL_MINIMUM;
602 /*********************************************************************
604 * Function : disable_logging
606 * Description : Disables logging.
612 *********************************************************************/
613 void disable_logging(void)
617 log_error(LOG_LEVEL_INFO,
618 "No logfile configured. Please enable it before reporting any problems.");
627 /*********************************************************************
629 * Function : init_error_log
631 * Description : Initializes the logging module to log to a file.
633 * XXX: should be renamed.
636 * 1 : prog_name = The program name.
637 * 2 : logfname = The logfile to (re)open.
641 *********************************************************************/
642 void init_error_log(const char *prog_name, const char *logfname)
646 assert(NULL != logfname);
652 log_error(LOG_LEVEL_INFO, "(Re-)Opening logfile \'%s\'", logfname);
655 /* set the designated log file */
656 fp = fopen(logfname, "a");
657 if ((NULL == fp) && (logfp != NULL))
660 * Some platforms (like OS/2) don't allow us to open
661 * the same file twice, therefore we give it another
662 * shot after closing the old file descriptor first.
664 * We don't do it right away because it prevents us
665 * from logging the "can't open logfile" message to
668 * XXX: this is a lame workaround and once the next
669 * release is out we should stop bothering reopening
670 * the logfile unless we have to.
672 * Currently we reopen it every time the config file
673 * has been reloaded, but actually we only have to
674 * reopen it if the file name changed or if the
675 * configuration reloas was caused by a SIGHUP.
677 log_error(LOG_LEVEL_INFO, "Failed to reopen logfile: \'%s\'. "
678 "Retrying after closing the old file descriptor first. If that "
679 "doesn't work, Privoxy will exit without being able to log a message.",
685 fp = fopen(logfname, "a");
690 log_error(LOG_LEVEL_FATAL, "init_error_log(): can't open logfile: \'%s\'", logfname);
693 /* set logging to be completely unbuffered */
706 * Prevent the Windows GUI from showing the version two
707 * times in a row on startup. It already displayed the show_version()
708 * call from init_log_module() that other systems write to stderr.
710 * This means mingw32 users will never see the version in their
711 * log file, but I assume they wouldn't look for it there anyway
712 * and simply use the "Help/About Privoxy" menu.
714 show_version(prog_name);
715 #endif /* def unix */
719 } /* init_error_log */
722 /*********************************************************************
724 * Function : get_thread_id
726 * Description : Returns a number that is different for each thread.
728 * XXX: Should be moved elsewhere (miscutil.c?)
732 * Returns : thread_id
734 *********************************************************************/
735 static long get_thread_id(void)
737 long this_thread = 1; /* was: pthread_t this_thread;*/
741 APIRET ulrc; /* XXX: I have no clue what this does */
744 /* FIXME get current thread id */
745 #ifdef FEATURE_PTHREAD
746 this_thread = (long)pthread_self();
749 * Mac OSX (and perhaps other Mach instances) doesn't have a debuggable
750 * value at the first 4 bytes of pthread_self()'s return value, a pthread_t.
751 * pthread_t is supposed to be opaque... but it's fairly random, though, so
752 * we make it mostly presentable.
754 this_thread = abs(this_thread % 1000);
755 #endif /* def __MACH__ */
756 #elif defined(_WIN32)
757 this_thread = GetCurrentThreadId();
758 #elif defined(__OS2__)
759 ulrc = DosGetInfoBlocks(&ptib, NULL);
761 this_thread = ptib -> tib_ptib2 -> tib2_ultid;
762 #endif /* def FEATURE_PTHREAD */
768 /*********************************************************************
770 * Function : get_log_timestamp
772 * Description : Generates the time stamp for the log message prefix.
775 * 1 : buffer = Storage buffer
776 * 2 : buffer_size = Size of storage buffer
778 * Returns : Number of written characters or 0 for error.
780 *********************************************************************/
781 static inline size_t get_log_timestamp(char *buffer, size_t buffer_size)
786 struct timeval tv_now; /* XXX: stupid name */
788 int msecs_length = 0;
790 gettimeofday(&tv_now, NULL);
791 msecs = tv_now.tv_usec / 1000;
795 #ifdef HAVE_LOCALTIME_R
796 tm_now = *localtime_r(&now, &tm_now);
797 #elif FEATURE_PTHREAD
798 privoxy_mutex_lock(&localtime_mutex);
799 tm_now = *localtime(&now);
800 privoxy_mutex_unlock(&localtime_mutex);
802 tm_now = *localtime(&now);
805 length = strftime(buffer, buffer_size, "%b %d %H:%M:%S", &tm_now);
808 msecs_length = snprintf(buffer+length, buffer_size - length, ".%.3ld", msecs);
810 if (msecs_length > 0)
812 length += (size_t)msecs_length;
823 /*********************************************************************
825 * Function : get_clf_timestamp
827 * Description : Generates a Common Log Format time string.
830 * 1 : buffer = Storage buffer
831 * 2 : buffer_size = Size of storage buffer
833 * Returns : Number of written characters or 0 for error.
835 *********************************************************************/
836 static inline size_t get_clf_timestamp(char *buffer, size_t buffer_size)
839 * Complex because not all OSs have tm_gmtoff or
840 * the %z field in strftime()
845 #ifdef HAVE_LOCALTIME_R
854 gmt = *gmtime_r(&now, &gmt);
855 #elif FEATURE_PTHREAD
856 privoxy_mutex_lock(&gmtime_mutex);
858 privoxy_mutex_unlock(&gmtime_mutex);
862 #ifdef HAVE_LOCALTIME_R
863 tm_now = localtime_r(&now, &dummy);
864 #elif FEATURE_PTHREAD
865 privoxy_mutex_lock(&localtime_mutex);
866 tm_now = localtime(&now);
867 privoxy_mutex_unlock(&localtime_mutex);
869 tm_now = localtime(&now);
871 days = tm_now->tm_yday - gmt.tm_yday;
872 hrs = ((days < -1 ? 24 : 1 < days ? -24 : days * 24) + tm_now->tm_hour - gmt.tm_hour);
873 mins = hrs * 60 + tm_now->tm_min - gmt.tm_min;
875 length = strftime(buffer, buffer_size, "%d/%b/%Y:%H:%M:%S ", tm_now);
879 tz_length = snprintf(buffer+length, buffer_size-length,
880 "%+03d%02d", mins / 60, abs(mins) % 60);
884 length += (size_t)tz_length;
895 /*********************************************************************
897 * Function : get_log_level_string
899 * Description : Translates a numerical loglevel into a string.
902 * 1 : loglevel = LOG_LEVEL_FOO
904 * Returns : Log level string.
906 *********************************************************************/
907 static inline const char *get_log_level_string(int loglevel)
909 char *log_level_string = NULL;
911 assert(0 < loglevel);
915 case LOG_LEVEL_ERROR:
916 log_level_string = "Error";
918 case LOG_LEVEL_FATAL:
919 log_level_string = "Fatal error";
922 log_level_string = "Request";
924 case LOG_LEVEL_CONNECT:
925 log_level_string = "Connect";
928 log_level_string = "Writing";
930 case LOG_LEVEL_HEADER:
931 log_level_string = "Header";
934 log_level_string = "Info";
936 case LOG_LEVEL_RE_FILTER:
937 log_level_string = "Re-Filter";
939 #ifdef FEATURE_FORCE_LOAD
940 case LOG_LEVEL_FORCE:
941 log_level_string = "Force";
943 #endif /* def FEATURE_FORCE_LOAD */
944 #ifdef FEATURE_FAST_REDIRECTS
945 case LOG_LEVEL_REDIRECTS:
946 log_level_string = "Redirect";
948 #endif /* def FEATURE_FAST_REDIRECTS */
949 case LOG_LEVEL_DEANIMATE:
950 log_level_string = "Gif-Deanimate";
953 log_level_string = "CGI";
956 log_level_string = "Unknown log level";
959 assert(NULL != log_level_string);
961 return log_level_string;
965 /*********************************************************************
967 * Function : log_error
969 * Description : This is the error-reporting and logging function.
972 * 1 : loglevel = the type of message to be logged
973 * 2 : fmt = the main string we want logged, printf-like
974 * 3 : ... = arguments to be inserted in fmt (printf-like).
978 *********************************************************************/
979 void log_error(int loglevel, const char *fmt, ...)
983 static char *outbuf_save = NULL;
984 char tempbuf[BUFFER_SIZE];
986 const char * src = fmt;
990 * XXX: Make this a config option,
991 * why else do we allocate instead of using
994 size_t log_buffer_size = BUFFER_SIZE;
996 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
998 * Irrespective of debug setting, a GET/POST/CONNECT makes
999 * the taskbar icon animate. (There is an option to disable
1000 * this but checking that is handled inside LogShowActivity()).
1002 if (loglevel == LOG_LEVEL_GPC)
1006 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1009 * verify that the loglevel applies to current
1010 * settings and that logging is enabled.
1011 * Bail out otherwise.
1013 if ((0 == (loglevel & debug))
1022 thread_id = get_thread_id();
1023 get_log_timestamp(timestamp, sizeof(timestamp));
1025 /* protect the whole function because of the static buffer (outbuf) */
1028 if (NULL == outbuf_save)
1030 outbuf_save = (char*)zalloc(log_buffer_size + 1); /* +1 for paranoia */
1031 if (NULL == outbuf_save)
1033 snprintf(tempbuf, sizeof(tempbuf),
1034 "%s %08lx Fatal error: Out of memory in log_error().",
1035 timestamp, thread_id);
1036 fatal_error(tempbuf); /* Exit */
1039 outbuf = outbuf_save;
1042 * Memsetting the whole buffer to zero (in theory)
1043 * makes things easier later on.
1045 memset(outbuf, 0, log_buffer_size);
1047 /* Add prefix for everything but Common Log Format messages */
1048 if (loglevel != LOG_LEVEL_CLF)
1050 length = (size_t)snprintf(outbuf, log_buffer_size, "%s %08lx %s: ",
1051 timestamp, thread_id, get_log_level_string(loglevel));
1054 /* get ready to scan var. args. */
1057 /* build formatted message from fmt and var-args */
1058 while ((*src) && (length < log_buffer_size-2))
1060 const char *sval = NULL; /* %N string */
1061 int ival; /* %N string length or an error code */
1062 unsigned uval; /* %u value */
1063 long lval; /* %l value */
1064 unsigned long ulval; /* %ul value */
1066 const char *format_string = tempbuf;
1071 outbuf[length++] = ch;
1073 * XXX: Only necessary on platforms where multiple threads
1074 * can write to the buffer at the same time because we
1075 * don't support mutexes (OS/2 for example).
1077 outbuf[length] = '\0';
1080 outbuf[length] = '\0';
1088 ival = va_arg( ap, int );
1089 snprintf(tempbuf, sizeof(tempbuf), "%d", ival);
1092 uval = va_arg( ap, unsigned );
1093 snprintf(tempbuf, sizeof(tempbuf), "%u", uval);
1096 /* this is a modifier that must be followed by u or d */
1100 lval = va_arg( ap, long );
1101 snprintf(tempbuf, sizeof(tempbuf), "%ld", lval);
1105 ulval = va_arg( ap, unsigned long );
1106 snprintf(tempbuf, sizeof(tempbuf), "%lu", ulval);
1110 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1111 loglevel = LOG_LEVEL_FATAL;
1116 * Note that char paramaters are converted to int, so we need to
1117 * pass "int" to va_arg. (See K&R, 2nd ed, section A7.3.2, page 202)
1119 tempbuf[0] = (char) va_arg(ap, int);
1123 format_string = va_arg(ap, char *);
1124 if (format_string == NULL)
1126 format_string = "[null]";
1131 * Non-standard: Print a counted unterminated string.
1132 * Takes 2 parameters: int length, const char * string.
1134 ival = va_arg(ap, int);
1135 sval = va_arg(ap, char *);
1138 format_string = "[null]";
1144 /* That's ok (but stupid) */
1150 * That's not ok (and even more stupid)
1153 format_string = "[counted string lenght < 0]";
1156 else if (ival >= sizeof(tempbuf))
1159 * String is too long, copy as much as possible.
1160 * It will be further truncated later.
1162 memcpy(tempbuf, sval, sizeof(tempbuf)-1);
1163 tempbuf[sizeof(tempbuf)-1] = '\0';
1167 memcpy(tempbuf, sval, (size_t) ival);
1168 tempbuf[ival] = '\0';
1172 /* Non-standard: Print error code from errno */
1174 ival = WSAGetLastError();
1175 format_string = w32_socket_strerr(ival, tempbuf);
1177 ival = sock_errno();
1180 format_string = os2_socket_strerr(ival, tempbuf);
1185 format_string = strerror(ival);
1187 #else /* ifndef _WIN32 */
1189 #ifdef HAVE_STRERROR
1190 format_string = strerror(ival);
1191 #else /* ifndef HAVE_STRERROR */
1192 format_string = NULL;
1193 #endif /* ndef HAVE_STRERROR */
1196 snprintf(tempbuf, sizeof(tempbuf), "(errno = %d)", ival);
1198 #endif /* ndef _WIN32 */
1201 /* Non-standard: Print a Common Log File timestamp */
1202 get_clf_timestamp(tempbuf, sizeof(tempbuf));
1205 snprintf(tempbuf, sizeof(tempbuf), "Bad format string: \"%s\"", fmt);
1206 loglevel = LOG_LEVEL_FATAL;
1210 assert(length < log_buffer_size);
1211 length += strlcpy(outbuf + length, format_string, log_buffer_size - length);
1213 if (length >= log_buffer_size-2)
1215 static char warning[] = "... [too long, truncated]";
1217 length = log_buffer_size - sizeof(warning) - 1;
1218 length += strlcpy(outbuf + length, warning, log_buffer_size - length);
1219 assert(length < log_buffer_size);
1223 } /* for( p ... ) */
1225 /* done with var. args */
1228 assert(length < log_buffer_size);
1229 length += strlcpy(outbuf + length, "\n", log_buffer_size - length);
1231 /* Some sanity checks */
1232 if ((length >= log_buffer_size)
1233 || (outbuf[log_buffer_size-1] != '\0')
1234 || (outbuf[log_buffer_size] != '\0')
1237 /* Repeat as assertions */
1238 assert(length < log_buffer_size);
1239 assert(outbuf[log_buffer_size-1] == '\0');
1241 * outbuf's real size is log_buffer_size+1,
1242 * so while this looks like an off-by-one,
1243 * we're only checking our paranoia byte.
1245 assert(outbuf[log_buffer_size] == '\0');
1247 snprintf(outbuf, log_buffer_size,
1248 "%s %08lx Fatal error: log_error()'s sanity checks failed."
1249 "length: %d. Exiting.",
1250 timestamp, thread_id, (int)length);
1251 loglevel = LOG_LEVEL_FATAL;
1256 * On Windows this is acceptable in case
1257 * we are logging to the GUI window only.
1259 assert(NULL != logfp);
1262 if (loglevel == LOG_LEVEL_FATAL)
1264 fatal_error(outbuf_save);
1265 /* Never get here */
1269 fputs(outbuf_save, logfp);
1272 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
1273 /* Write to display */
1274 LogPutString(outbuf_save);
1275 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1282 /*********************************************************************
1284 * Function : jb_err_to_string
1286 * Description : Translates JB_ERR_FOO codes into strings.
1288 * XXX: the type of error codes is jb_err
1289 * but the typedef'inition is currently not
1290 * visible to all files that include errlog.h.
1293 * 1 : error = a valid jb_err code
1295 * Returns : A string with the jb_err translation
1297 *********************************************************************/
1298 const char *jb_err_to_string(int error)
1303 return "Success, no error";
1305 return "Out of memory";
1306 case JB_ERR_CGI_PARAMS:
1307 return "Missing or corrupt CGI parameters";
1309 return "Error opening, reading or writing a file";
1311 return "Parse error";
1312 case JB_ERR_MODIFIED:
1313 return "File has been modified outside of the CGI actions editor.";
1314 case JB_ERR_COMPRESS:
1315 return "(De)compression failure";
1318 return "Unknown error";
1321 return "Internal error";
1325 /*********************************************************************
1327 * Function : w32_socket_strerr
1329 * Description : Translate the return value from WSAGetLastError()
1333 * 1 : errcode = The return value from WSAGetLastError().
1334 * 2 : tmp_buf = A temporary buffer that might be used to
1337 * Returns : String representing the error code. This may be
1338 * a global string constant or a string stored in
1341 *********************************************************************/
1342 static char *w32_socket_strerr(int errcode, char *tmp_buf)
1344 #define TEXT_FOR_ERROR(code,text) \
1345 if (errcode == code) \
1347 return #code " - " text; \
1350 TEXT_FOR_ERROR(WSAEACCES, "Permission denied")
1351 TEXT_FOR_ERROR(WSAEADDRINUSE, "Address already in use.")
1352 TEXT_FOR_ERROR(WSAEADDRNOTAVAIL, "Cannot assign requested address.");
1353 TEXT_FOR_ERROR(WSAEAFNOSUPPORT, "Address family not supported by protocol family.");
1354 TEXT_FOR_ERROR(WSAEALREADY, "Operation already in progress.");
1355 TEXT_FOR_ERROR(WSAECONNABORTED, "Software caused connection abort.");
1356 TEXT_FOR_ERROR(WSAECONNREFUSED, "Connection refused.");
1357 TEXT_FOR_ERROR(WSAECONNRESET, "Connection reset by peer.");
1358 TEXT_FOR_ERROR(WSAEDESTADDRREQ, "Destination address required.");
1359 TEXT_FOR_ERROR(WSAEFAULT, "Bad address.");
1360 TEXT_FOR_ERROR(WSAEHOSTDOWN, "Host is down.");
1361 TEXT_FOR_ERROR(WSAEHOSTUNREACH, "No route to host.");
1362 TEXT_FOR_ERROR(WSAEINPROGRESS, "Operation now in progress.");
1363 TEXT_FOR_ERROR(WSAEINTR, "Interrupted function call.");
1364 TEXT_FOR_ERROR(WSAEINVAL, "Invalid argument.");
1365 TEXT_FOR_ERROR(WSAEISCONN, "Socket is already connected.");
1366 TEXT_FOR_ERROR(WSAEMFILE, "Too many open sockets.");
1367 TEXT_FOR_ERROR(WSAEMSGSIZE, "Message too long.");
1368 TEXT_FOR_ERROR(WSAENETDOWN, "Network is down.");
1369 TEXT_FOR_ERROR(WSAENETRESET, "Network dropped connection on reset.");
1370 TEXT_FOR_ERROR(WSAENETUNREACH, "Network is unreachable.");
1371 TEXT_FOR_ERROR(WSAENOBUFS, "No buffer space available.");
1372 TEXT_FOR_ERROR(WSAENOPROTOOPT, "Bad protocol option.");
1373 TEXT_FOR_ERROR(WSAENOTCONN, "Socket is not connected.");
1374 TEXT_FOR_ERROR(WSAENOTSOCK, "Socket operation on non-socket.");
1375 TEXT_FOR_ERROR(WSAEOPNOTSUPP, "Operation not supported.");
1376 TEXT_FOR_ERROR(WSAEPFNOSUPPORT, "Protocol family not supported.");
1377 TEXT_FOR_ERROR(WSAEPROCLIM, "Too many processes.");
1378 TEXT_FOR_ERROR(WSAEPROTONOSUPPORT, "Protocol not supported.");
1379 TEXT_FOR_ERROR(WSAEPROTOTYPE, "Protocol wrong type for socket.");
1380 TEXT_FOR_ERROR(WSAESHUTDOWN, "Cannot send after socket shutdown.");
1381 TEXT_FOR_ERROR(WSAESOCKTNOSUPPORT, "Socket type not supported.");
1382 TEXT_FOR_ERROR(WSAETIMEDOUT, "Connection timed out.");
1383 TEXT_FOR_ERROR(WSAEWOULDBLOCK, "Resource temporarily unavailable.");
1384 TEXT_FOR_ERROR(WSAHOST_NOT_FOUND, "Host not found.");
1385 TEXT_FOR_ERROR(WSANOTINITIALISED, "Successful WSAStartup not yet performed.");
1386 TEXT_FOR_ERROR(WSANO_DATA, "Valid name, no data record of requested type.");
1387 TEXT_FOR_ERROR(WSANO_RECOVERY, "This is a non-recoverable error.");
1388 TEXT_FOR_ERROR(WSASYSNOTREADY, "Network subsystem is unavailable.");
1389 TEXT_FOR_ERROR(WSATRY_AGAIN, "Non-authoritative host not found.");
1390 TEXT_FOR_ERROR(WSAVERNOTSUPPORTED, "WINSOCK.DLL version out of range.");
1391 TEXT_FOR_ERROR(WSAEDISCON, "Graceful shutdown in progress.");
1393 * The following error codes are documented in the Microsoft WinSock
1394 * reference guide, but don't actually exist.
1396 * TEXT_FOR_ERROR(WSA_INVALID_HANDLE, "Specified event object handle is invalid.");
1397 * TEXT_FOR_ERROR(WSA_INVALID_PARAMETER, "One or more parameters are invalid.");
1398 * TEXT_FOR_ERROR(WSAINVALIDPROCTABLE, "Invalid procedure table from service provider.");
1399 * TEXT_FOR_ERROR(WSAINVALIDPROVIDER, "Invalid service provider version number.");
1400 * TEXT_FOR_ERROR(WSA_IO_PENDING, "Overlapped operations will complete later.");
1401 * TEXT_FOR_ERROR(WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state.");
1402 * TEXT_FOR_ERROR(WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available.");
1403 * TEXT_FOR_ERROR(WSAPROVIDERFAILEDINIT, "Unable to initialize a service provider.");
1404 * TEXT_FOR_ERROR(WSASYSCALLFAILURE, "System call failure.");
1405 * TEXT_FOR_ERROR(WSA_OPERATION_ABORTED, "Overlapped operation aborted.");
1408 sprintf(tmp_buf, "(error number %d)", errcode);
1411 #endif /* def _WIN32 */
1415 /*********************************************************************
1417 * Function : os2_socket_strerr
1419 * Description : Translate the return value from sock_errno()
1423 * 1 : errcode = The return value from sock_errno().
1424 * 2 : tmp_buf = A temporary buffer that might be used to
1427 * Returns : String representing the error code. This may be
1428 * a global string constant or a string stored in
1431 *********************************************************************/
1432 static char *os2_socket_strerr(int errcode, char *tmp_buf)
1434 #define TEXT_FOR_ERROR(code,text) \
1435 if (errcode == code) \
1437 return #code " - " text; \
1440 TEXT_FOR_ERROR(SOCEPERM , "Not owner.")
1441 TEXT_FOR_ERROR(SOCESRCH , "No such process.")
1442 TEXT_FOR_ERROR(SOCEINTR , "Interrupted system call.")
1443 TEXT_FOR_ERROR(SOCENXIO , "No such device or address.")
1444 TEXT_FOR_ERROR(SOCEBADF , "Bad file number.")
1445 TEXT_FOR_ERROR(SOCEACCES , "Permission denied.")
1446 TEXT_FOR_ERROR(SOCEFAULT , "Bad address.")
1447 TEXT_FOR_ERROR(SOCEINVAL , "Invalid argument.")
1448 TEXT_FOR_ERROR(SOCEMFILE , "Too many open files.")
1449 TEXT_FOR_ERROR(SOCEPIPE , "Broken pipe.")
1450 TEXT_FOR_ERROR(SOCEWOULDBLOCK , "Operation would block.")
1451 TEXT_FOR_ERROR(SOCEINPROGRESS , "Operation now in progress.")
1452 TEXT_FOR_ERROR(SOCEALREADY , "Operation already in progress.")
1453 TEXT_FOR_ERROR(SOCENOTSOCK , "Socket operation on non-socket.")
1454 TEXT_FOR_ERROR(SOCEDESTADDRREQ , "Destination address required.")
1455 TEXT_FOR_ERROR(SOCEMSGSIZE , "Message too long.")
1456 TEXT_FOR_ERROR(SOCEPROTOTYPE , "Protocol wrong type for socket.")
1457 TEXT_FOR_ERROR(SOCENOPROTOOPT , "Protocol not available.")
1458 TEXT_FOR_ERROR(SOCEPROTONOSUPPORT, "Protocol not supported.")
1459 TEXT_FOR_ERROR(SOCESOCKTNOSUPPORT, "Socket type not supported.")
1460 TEXT_FOR_ERROR(SOCEOPNOTSUPP , "Operation not supported.")
1461 TEXT_FOR_ERROR(SOCEPFNOSUPPORT , "Protocol family not supported.")
1462 TEXT_FOR_ERROR(SOCEAFNOSUPPORT , "Address family not supported by protocol family.")
1463 TEXT_FOR_ERROR(SOCEADDRINUSE , "Address already in use.")
1464 TEXT_FOR_ERROR(SOCEADDRNOTAVAIL , "Can't assign requested address.")
1465 TEXT_FOR_ERROR(SOCENETDOWN , "Network is down.")
1466 TEXT_FOR_ERROR(SOCENETUNREACH , "Network is unreachable.")
1467 TEXT_FOR_ERROR(SOCENETRESET , "Network dropped connection on reset.")
1468 TEXT_FOR_ERROR(SOCECONNABORTED , "Software caused connection abort.")
1469 TEXT_FOR_ERROR(SOCECONNRESET , "Connection reset by peer.")
1470 TEXT_FOR_ERROR(SOCENOBUFS , "No buffer space available.")
1471 TEXT_FOR_ERROR(SOCEISCONN , "Socket is already connected.")
1472 TEXT_FOR_ERROR(SOCENOTCONN , "Socket is not connected.")
1473 TEXT_FOR_ERROR(SOCESHUTDOWN , "Can't send after socket shutdown.")
1474 TEXT_FOR_ERROR(SOCETOOMANYREFS , "Too many references: can't splice.")
1475 TEXT_FOR_ERROR(SOCETIMEDOUT , "Operation timed out.")
1476 TEXT_FOR_ERROR(SOCECONNREFUSED , "Connection refused.")
1477 TEXT_FOR_ERROR(SOCELOOP , "Too many levels of symbolic links.")
1478 TEXT_FOR_ERROR(SOCENAMETOOLONG , "File name too long.")
1479 TEXT_FOR_ERROR(SOCEHOSTDOWN , "Host is down.")
1480 TEXT_FOR_ERROR(SOCEHOSTUNREACH , "No route to host.")
1481 TEXT_FOR_ERROR(SOCENOTEMPTY , "Directory not empty.")
1482 TEXT_FOR_ERROR(SOCEOS2ERR , "OS/2 Error.")
1484 sprintf(tmp_buf, "(error number %d)", errcode);
1487 #endif /* def __OS2__ */