1 const char errlog_rcs[] = "$Id: errlog.c,v 1.5 2001/05/22 18:46:04 oes 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 the SourceForge
10 * IJBSWA team. http://ijbswa.sourceforge.net
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 1.5 2001/05/22 18:46:04 oes
38 * - Enabled filtering banners by size rather than URL
39 * by adding patterns that replace all standard banner
40 * sizes with the "Junkbuster" gif to the re_filterfile
42 * - Enabled filtering WebBugs by providing a pattern
43 * which kills all 1x1 images
45 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
46 * which is selected by the (nonstandard and therefore
47 * capital) letter 'U' in the option string.
48 * It causes the quantifiers to be ungreedy by default.
49 * Appending a ? turns back to greedy (!).
51 * - Added a new interceptor ijb-send-banner, which
52 * sends back the "Junkbuster" gif. Without imagelist or
53 * MSIE detection support, or if tinygif = 1, or the
54 * URL isn't recognized as an imageurl, a lame HTML
55 * explanation is sent instead.
57 * - Added new feature, which permits blocking remote
58 * script redirects and firing back a local redirect
60 * The feature is conditionally compiled, i.e. it
61 * can be disabled with --disable-fast-redirects,
62 * plus it must be activated by a "fast-redirects"
63 * line in the config file, has its own log level
64 * and of course wants to be displayed by show-proxy-args
65 * Note: Boy, all the #ifdefs in 1001 locations and
66 * all the fumbling with configure.in and acconfig.h
67 * were *way* more work than the feature itself :-(
69 * - Because a generic redirect template was needed for
70 * this, tinygif = 3 now uses the same.
72 * - Moved GIFs, and other static HTTP response templates
77 * - Removed some >400 CRs again (Jon, you really worked
80 * Revision 1.4 2001/05/21 19:32:54 jongfoster
81 * Added another #ifdef _WIN_CONSOLE
83 * Revision 1.3 2001/05/20 01:11:40 jongfoster
84 * Added support for LOG_LEVEL_FATAL
85 * Renamed LOG_LEVEL_FRC to LOG_LEVEL_FORCE,
86 * and LOG_LEVEL_REF to LOG_LEVEL_RE_FILTER
88 * Revision 1.2 2001/05/17 22:42:01 oes
89 * - Cleaned CRLF's from the sources and related files
90 * - Repaired logging for REF and FRC
92 * Revision 1.1.1.1 2001/05/15 13:58:51 oes
93 * Initial import of version 2.9.3 source tree
96 *********************************************************************/
108 #endif /* ndef _WIN32 */
111 /* #include <pthread.h> */
117 #endif /* ndef _WIN_CONSOLE */
118 #endif /* def _WIN32 */
123 const char errlog_h_rcs[] = ERRLOG_H_VERSION;
127 * LOG_LEVEL_FATAL, LOG_LEVEL_ERROR and LOG_LEVEL_INFO
128 * cannot be turned off. (There are some exceptional situations
129 * where we need to get a message to the user).
131 * FIXME: Do we need LOG_LEVEL_INFO here?
133 #define LOG_LEVEL_MINIMUM (LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO)
135 /* where to log (default: stderr) */
136 static FILE *logfp = NULL;
138 /* where to log (NULL == stderr) */
139 static char * logfilename = NULL;
141 /* logging detail level. */
142 static int debug = LOG_LEVEL_MINIMUM;
144 static void fatal_error(const char * error_message);
147 /*********************************************************************
149 * Function : fatal_error
151 * Description : Displays a fatal error to standard error (or, on
152 * a WIN32 GUI, to a dialog box), and exits
153 * JunkBuster with status code 1.
156 * 1 : error_message = The error message to display.
158 * Returns : Does not return.
160 *********************************************************************/
161 static void fatal_error(const char * error_message)
163 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
164 MessageBox(g_hwndLogFrame, error_message, "Internet JunkBuster Error",
165 MB_OK | MB_ICONERROR | MB_TASKMODAL | MB_SETFOREGROUND | MB_TOPMOST);
167 /* Cleanup - remove taskbar icon etc. */
170 #else /* if !defined(_WIN32) || defined(_WIN_CONSOLE) */
171 fputs(error_message, stderr);
172 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
178 /*********************************************************************
180 * Function : init_errlog
182 * Description : Initializes the logging module. Must call before
186 * 1 : prog_name = The program name.
187 * 2 : logfname = The logfile name, or NULL for stderr.
188 * 3 : debuglevel = The debugging level.
192 *********************************************************************/
193 void init_error_log(const char *prog_name, const char *logfname, int debuglevel)
197 /* FIXME RACE HAZARD: should start critical section error_log_use here */
199 /* set the logging detail level */
200 debug = debuglevel | LOG_LEVEL_MINIMUM;
202 if ((logfp != NULL) && (logfp != stderr))
208 /* set the designated log file */
211 if( !(fp = fopen(logfname, "a")) )
213 log_error(LOG_LEVEL_FATAL, "init_errlog(): can't open logfile: %s", logfname);
216 /* set logging to be completely unbuffered */
222 log_error(LOG_LEVEL_INFO, "Internet JunkBuster version " VERSION);
223 if (prog_name != NULL)
225 log_error(LOG_LEVEL_INFO, "Program name: %s", prog_name);
228 /* FIXME RACE HAZARD: should end critical section error_log_use here */
230 } /* init_error_log */
233 /*********************************************************************
235 * Function : log_error
237 * Description : This is the error-reporting and logging function.
240 * 1 : loglevel = the type of message to be logged
241 * 2 : fmt = the main string we want logged, printf-like
242 * 3 : ... = arguments to be inserted in fmt (printf-like).
246 *********************************************************************/
247 void log_error(int loglevel, char *fmt, ...)
253 long this_thread = 1; /* was: pthread_t this_thread;*/
255 /* verify if loglevel applies to current settings and bail out if negative */
256 if(!(loglevel & debug))
261 /* FIXME get current thread id */
262 /* this_thread = (long)pthread_self(); */
266 /* FIXME: What about LOG_LEVEL_LOG ??? */
267 case LOG_LEVEL_ERROR:
268 outc = sprintf(outbuf, "IJB(%d) Error: ", this_thread);
270 case LOG_LEVEL_FATAL:
271 outc = sprintf(outbuf, "IJB(%d) Fatal error: ", this_thread);
274 outc = sprintf(outbuf, "IJB(%d) Request: ", this_thread);
276 case LOG_LEVEL_CONNECT:
277 outc = sprintf(outbuf, "IJB(%d) Connect: ", this_thread);
279 case LOG_LEVEL_HEADER:
280 outc = sprintf(outbuf, "IJB(%d) Header: ", this_thread);
283 outc = sprintf(outbuf, "IJB(%d) Info: ", this_thread);
286 case LOG_LEVEL_RE_FILTER:
287 outc = sprintf(outbuf, "IJB(%d) Re-Filter: ", this_thread);
289 #endif /* def PCRS */
291 case LOG_LEVEL_FORCE:
292 outc = sprintf(outbuf, "IJB(%d) Force: ", this_thread);
294 #endif /* def FORCE_LOAD */
295 #ifdef FAST_REDIRECTS
296 case LOG_LEVEL_REDIRECTS:
297 outc = sprintf(outbuf, "IJB(%d) Redirect: ", this_thread);
299 #endif /* def FAST_REDIRECTS */
301 outc = sprintf(outbuf, "IJB(%d) UNKNOWN LOG TYPE(%d): ", this_thread, loglevel);
305 /* get ready to scan var. args. */
308 /* build formatted message from fmt and var-args */
309 while ((*src) && (outc < BUFSIZ-2))
311 char tempbuf[BUFSIZ];
330 outbuf[outc++] = '%';
333 ival = va_arg( ap, int );
335 outc += sprintf(tempbuf, "%d", ival);
338 strcpy(outbuf + oldoutc, tempbuf);
342 outbuf[oldoutc] = '\0';
346 uval = va_arg( ap, unsigned );
348 outc += sprintf(tempbuf, "%u", uval);
351 strcpy(outbuf + oldoutc, tempbuf);
355 outbuf[oldoutc] = '\0';
359 /* this is a modifier that must be followed by u or d */
363 lval = va_arg( ap, long );
365 outc += sprintf(tempbuf, "%ld", lval);
369 ulval = va_arg( ap, unsigned long );
371 outc += sprintf(tempbuf, "%lu", ulval);
376 sprintf(outbuf, "IJB(%d) Error: log_error(): Bad format string:\n"
378 "Exiting.", this_thread, fmt);
379 /* FIXME RACE HAZARD: should start critical section error_log_use here */
384 fputs(outbuf, logfp);
385 /* FIXME RACE HAZARD: should end critical section error_log_use here */
392 strcpy(outbuf + oldoutc, tempbuf);
396 outbuf[oldoutc] = '\0';
401 * Note that char paramaters are converted to int, so we need to
402 * pass "int" to va_arg. (See K&R, 2nd ed, section A7.3.2, page 202)
404 outbuf[outc++] = (char) va_arg( ap, int );
407 sval = va_arg( ap, char * );
409 outc += strlen(sval);
412 strcpy(outbuf + oldoutc, sval);
416 outbuf[oldoutc] = '\0';
420 /* Non-standard: Print error code from errno */
423 sval = strerror(ival);
424 #else /* def NOSTRERROR */
426 #endif /* def NOSTRERROR */
429 sprintf(tempbuf, "(errno = %d)", ival);
433 outc += strlen(sval);
436 strcpy(outbuf + oldoutc, sval);
440 outbuf[oldoutc] = '\0';
444 sprintf(outbuf, "IJB(%d) Error: log_error(): Bad format string:\n"
446 "Exiting.", this_thread, fmt);
447 /* FIXME RACE HAZARD: should start critical section error_log_use here */
452 fputs(outbuf, logfp);
453 /* FIXME RACE HAZARD: should end critical section error_log_use here */
462 /* done with var. args */
465 if (outc >= BUFSIZ-2)
467 /* insufficient room for newline and trailing null. */
469 static const char warning[] = "... [too long, truncated]\n";
473 /* Need to add terminating null in this case. */
477 /* Truncate output */
478 outbuf[BUFSIZ - sizeof(warning)] = '\0';
481 strcat(outbuf, warning);
485 /* Add terminating newline and null */
486 outbuf[outc++] = '\n';
490 /* FIXME RACE HAZARD: should start critical section error_log_use here */
492 /* deal with glibc stupidity - it won't let you initialize logfp */
498 fputs(outbuf, logfp);
500 if (loglevel == LOG_LEVEL_FATAL)
506 /* FIXME RACE HAZARD: should end critical section error_log_use here */
508 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
509 /* Write to display */
510 LogPutString(outbuf);
512 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */