Moving source files to src/
[privoxy.git] / src / errlog.c
diff --git a/src/errlog.c b/src/errlog.c
new file mode 100644 (file)
index 0000000..c65aec9
--- /dev/null
@@ -0,0 +1,973 @@
+const char errlog_rcs[] = "$Id: errlog.c,v 1.40 2002/05/22 01:27:27 david__schmidt Exp $";
+/*********************************************************************
+ *
+ * File        :  $Source: /cvsroot/ijbswa/current/errlog.c,v $
+ *
+ * Purpose     :  Log errors to a designated destination in an elegant,
+ *                printf-like fashion.
+ *
+ * Copyright   :  Written by and Copyright (C) 2001 the SourceForge
+ *                Privoxy team. http://www.privoxy.org/
+ *
+ *                Based on the Internet Junkbuster originally written
+ *                by and Copyright (C) 1997 Anonymous Coders and 
+ *                Junkbusters Corporation.  http://www.junkbusters.com
+ *
+ *                This program is free software; you can redistribute it 
+ *                and/or modify it under the terms of the GNU General
+ *                Public License as published by the Free Software
+ *                Foundation; either version 2 of the License, or (at
+ *                your option) any later version.
+ *
+ *                This program is distributed in the hope that it will
+ *                be useful, but WITHOUT ANY WARRANTY; without even the
+ *                implied warranty of MERCHANTABILITY or FITNESS FOR A
+ *                PARTICULAR PURPOSE.  See the GNU General Public
+ *                License for more details.
+ *
+ *                The GNU General Public License should be included with
+ *                this file.  If not, you can view it at
+ *                http://www.gnu.org/copyleft/gpl.html
+ *                or write to the Free Software Foundation, Inc., 59
+ *                Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * Revisions   :
+ *    $Log: errlog.c,v $
+ *    Revision 1.40  2002/05/22 01:27:27  david__schmidt
+ *
+ *    Add os2_socket_strerr mirroring w32_socket_strerr.
+ *
+ *    Revision 1.39  2002/04/03 17:15:27  gliptak
+ *    zero padding thread ids in log
+ *
+ *    Revision 1.38  2002/03/31 17:18:59  jongfoster
+ *    Win32 only: Enabling STRICT to fix a VC++ compile warning.
+ *
+ *    Revision 1.37  2002/03/27 14:32:43  david__schmidt
+ *    More compiler warning message maintenance
+ *
+ *    Revision 1.36  2002/03/26 22:29:54  swa
+ *    we have a new homepage!
+ *
+ *    Revision 1.35  2002/03/24 15:23:33  jongfoster
+ *    Name changes
+ *
+ *    Revision 1.34  2002/03/24 13:25:43  swa
+ *    name change related issues
+ *
+ *    Revision 1.33  2002/03/13 00:27:04  jongfoster
+ *    Killing warnings
+ *
+ *    Revision 1.32  2002/03/07 03:46:17  oes
+ *    Fixed compiler warnings
+ *
+ *    Revision 1.31  2002/03/06 23:02:57  jongfoster
+ *    Removing tabs
+ *
+ *    Revision 1.30  2002/03/05 22:43:45  david__schmidt
+ *    - Better error reporting on OS/2
+ *    - Fix double-slash comment (oops)
+ *
+ *    Revision 1.29  2002/03/04 23:45:13  jongfoster
+ *    Printing thread ID if using Win32 native threads
+ *
+ *    Revision 1.28  2002/03/04 17:59:59  oes
+ *    Deleted deletePidFile(), cosmetics
+ *
+ *    Revision 1.27  2002/03/04 02:08:01  david__schmidt
+ *    Enable web editing of actions file on OS/2 (it had been broken all this time!)
+ *
+ *    Revision 1.26  2002/01/09 19:05:45  steudten
+ *    Fix big memory leak.
+ *
+ *    Revision 1.25  2002/01/09 14:32:08  oes
+ *    Added support for gmtime_r and localtime_r.
+ *
+ *    Revision 1.24  2001/12/30 14:07:32  steudten
+ *    - Add signal handling (unix)
+ *    - Add SIGHUP handler (unix)
+ *    - Add creation of pidfile (unix)
+ *    - Add action 'top' in rc file (RH)
+ *    - Add entry 'SIGNALS' to manpage
+ *    - Add exit message to logfile (unix)
+ *
+ *    Revision 1.23  2001/11/07 00:02:13  steudten
+ *    Add line number in error output for lineparsing for
+ *    actionsfile and configfile.
+ *    Special handling for CLF added.
+ *
+ *    Revision 1.22  2001/11/05 23:43:05  steudten
+ *    Add time+date to log files.
+ *
+ *    Revision 1.21  2001/10/25 03:40:47  david__schmidt
+ *    Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
+ *    threads to call select() simultaneously.  So, it's time to do a real, live,
+ *    native OS/2 port.  See defines for __EMX__ (the porting layer) vs. __OS2__
+ *    (native). Both versions will work, but using __OS2__ offers multi-threading.
+ *
+ *    Revision 1.20  2001/09/16 23:04:34  jongfoster
+ *    Fixing a warning
+ *
+ *    Revision 1.19  2001/09/13 20:08:06  jongfoster
+ *    Adding support for LOG_LEVEL_CGI
+ *
+ *    Revision 1.18  2001/09/10 11:27:24  oes
+ *    Declaration of w32_socket_strerr now conditional
+ *
+ *    Revision 1.17  2001/09/10 10:17:13  oes
+ *    Removed unused variable; Fixed sprintf format
+ *
+ *    Revision 1.16  2001/07/30 22:08:36  jongfoster
+ *    Tidying up #defines:
+ *    - All feature #defines are now of the form FEATURE_xxx
+ *    - Permanently turned off WIN_GUI_EDIT
+ *    - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
+ *
+ *    Revision 1.15  2001/07/29 17:41:10  jongfoster
+ *    Now prints thread ID for each message (pthreads only)
+ *
+ *    Revision 1.14  2001/07/19 19:03:48  haroon
+ *    - Added case for LOG_LEVEL_POPUPS
+ *
+ *    Revision 1.13  2001/07/13 13:58:58  oes
+ *     - Added case for LOG_LEVEL_DEANIMATE
+ *     - Removed all #ifdef PCRS
+ *
+ *    Revision 1.12  2001/06/09 10:55:28  jongfoster
+ *    Changing BUFSIZ ==> BUFFER_SIZE
+ *
+ *    Revision 1.11  2001/06/01 18:14:49  jongfoster
+ *    Changing the calls to strerr() to check HAVE_STRERR (which is defined
+ *    in config.h if appropriate) rather than the NO_STRERR macro.
+ *
+ *    Revision 1.10  2001/05/29 11:52:21  oes
+ *    Conditional compilation of w32_socket_error
+ *
+ *    Revision 1.9  2001/05/28 16:15:17  jongfoster
+ *    Improved reporting of errors under Win32.
+ *
+ *    Revision 1.8  2001/05/26 17:25:14  jongfoster
+ *    Added support for CLF (Common Log Format) and fixed LOG_LEVEL_LOG
+ *
+ *    Revision 1.7  2001/05/26 15:21:28  jongfoster
+ *    Activity animation in Win32 GUI now works even if debug==0
+ *
+ *    Revision 1.6  2001/05/25 21:55:08  jongfoster
+ *    Now cleans up properly on FATAL (removes taskbar icon etc)
+ *
+ *    Revision 1.5  2001/05/22 18:46:04  oes
+ *
+ *    - Enabled filtering banners by size rather than URL
+ *      by adding patterns that replace all standard banner
+ *      sizes with the "Junkbuster" gif to the re_filterfile
+ *
+ *    - Enabled filtering WebBugs by providing a pattern
+ *      which kills all 1x1 images
+ *
+ *    - Added support for PCRE_UNGREEDY behaviour to pcrs,
+ *      which is selected by the (nonstandard and therefore
+ *      capital) letter 'U' in the option string.
+ *      It causes the quantifiers to be ungreedy by default.
+ *      Appending a ? turns back to greedy (!).
+ *
+ *    - Added a new interceptor ijb-send-banner, which
+ *      sends back the "Junkbuster" gif. Without imagelist or
+ *      MSIE detection support, or if tinygif = 1, or the
+ *      URL isn't recognized as an imageurl, a lame HTML
+ *      explanation is sent instead.
+ *
+ *    - Added new feature, which permits blocking remote
+ *      script redirects and firing back a local redirect
+ *      to the browser.
+ *      The feature is conditionally compiled, i.e. it
+ *      can be disabled with --disable-fast-redirects,
+ *      plus it must be activated by a "fast-redirects"
+ *      line in the config file, has its own log level
+ *      and of course wants to be displayed by show-proxy-args
+ *      Note: Boy, all the #ifdefs in 1001 locations and
+ *      all the fumbling with configure.in and acconfig.h
+ *      were *way* more work than the feature itself :-(
+ *
+ *    - Because a generic redirect template was needed for
+ *      this, tinygif = 3 now uses the same.
+ *
+ *    - Moved GIFs, and other static HTTP response templates
+ *      to project.h
+ *
+ *    - Some minor fixes
+ *
+ *    - Removed some >400 CRs again (Jon, you really worked
+ *      a lot! ;-)
+ *
+ *    Revision 1.4  2001/05/21 19:32:54  jongfoster
+ *    Added another #ifdef _WIN_CONSOLE
+ *
+ *    Revision 1.3  2001/05/20 01:11:40  jongfoster
+ *    Added support for LOG_LEVEL_FATAL
+ *    Renamed LOG_LEVEL_FRC to LOG_LEVEL_FORCE,
+ *    and LOG_LEVEL_REF to LOG_LEVEL_RE_FILTER
+ *
+ *    Revision 1.2  2001/05/17 22:42:01  oes
+ *     - Cleaned CRLF's from the sources and related files
+ *     - Repaired logging for REF and FRC
+ *
+ *    Revision 1.1.1.1  2001/05/15 13:58:51  oes
+ *    Initial import of version 2.9.3 source tree
+ *
+ *
+ *********************************************************************/
+\f
+
+#include "config.h"
+#include "miscutil.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+#if !defined(_WIN32) && !defined(__OS2__)
+#include <unistd.h>
+#endif /* !defined(_WIN32) && !defined(__OS2__) */
+
+#include <errno.h>
+#include <assert.h>
+#ifdef FEATURE_PTHREAD
+#include <pthread.h>
+#endif /* def FEATURE_PTHREAD */
+
+#ifdef _WIN32
+#ifndef STRICT
+#define STRICT
+#endif
+#include <windows.h>
+#ifndef _WIN_CONSOLE
+#include "w32log.h"
+#endif /* ndef _WIN_CONSOLE */
+#endif /* def _WIN32 */
+
+#ifdef __OS2__
+#include <sys/socket.h> /* For sock_errno */
+#define INCL_DOS
+#include <os2.h>
+#endif
+
+#include "errlog.h"
+#include "project.h"
+#include "jcc.h"
+
+const char errlog_h_rcs[] = ERRLOG_H_VERSION;
+
+
+/*
+ * LOG_LEVEL_FATAL cannot be turned off.  (There are
+ * some exceptional situations where we need to get a
+ * message to the user).
+ */
+#define LOG_LEVEL_MINIMUM  LOG_LEVEL_FATAL
+
+/* where to log (default: stderr) */
+static FILE *logfp = NULL;
+
+/* logging detail level.  */
+static int debug = (LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);  
+
+/* static functions */
+static void fatal_error(const char * error_message);
+#ifdef _WIN32
+static char *w32_socket_strerr(int errcode, char *tmp_buf);
+#endif
+#ifdef __OS2__
+static char *os2_socket_strerr(int errcode, char *tmp_buf);
+#endif
+
+/*********************************************************************
+ *
+ * Function    :  fatal_error
+ *
+ * Description :  Displays a fatal error to standard error (or, on 
+ *                a WIN32 GUI, to a dialog box), and exits
+ *                JunkBuster with status code 1.
+ *
+ * Parameters  :
+ *          1  :  error_message = The error message to display.
+ *
+ * Returns     :  Does not return.
+ *
+ *********************************************************************/
+static void fatal_error(const char * error_message)
+{
+#if defined(_WIN32) && !defined(_WIN_CONSOLE)
+   MessageBox(g_hwndLogFrame, error_message, "Privoxy Error", 
+      MB_OK | MB_ICONERROR | MB_TASKMODAL | MB_SETFOREGROUND | MB_TOPMOST);  
+
+   /* Cleanup - remove taskbar icon etc. */
+   TermLogWindow();
+
+#else /* if !defined(_WIN32) || defined(_WIN_CONSOLE) */
+   fputs(error_message, stderr);
+#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
+
+#if defined(unix)
+   unlink(pidfile);
+#endif /* unix */
+
+   exit(1);
+}
+
+
+/*********************************************************************
+ *
+ * Function    :  init_error_log
+ *
+ * Description :  Initializes the logging module.  Must call before
+ *                calling log_error.
+ *
+ * Parameters  :
+ *          1  :  prog_name  = The program name.
+ *          2  :  logfname   = The logfile name, or NULL for stderr.
+ *          3  :  debuglevel = The debugging level.
+ *
+ * Returns     :  N/A
+ *
+ *********************************************************************/
+void init_error_log(const char *prog_name, const char *logfname, int debuglevel)
+{
+   FILE *fp;
+
+   /* FIXME RACE HAZARD: should start critical section error_log_use here */
+
+   /* set the logging detail level */
+   debug = debuglevel | LOG_LEVEL_MINIMUM;
+
+   if ((logfp != NULL) && (logfp != stderr))
+   {
+      log_error(LOG_LEVEL_INFO, "(Re-)Open logfile %s", logfname ? logfname : "none");
+      fclose(logfp);
+   }
+   logfp = stderr;
+
+   /* set the designated log file */
+   if( logfname )
+   {
+      if( NULL == (fp = fopen(logfname, "a")) )
+      {
+         log_error(LOG_LEVEL_FATAL, "init_error_log(): can't open logfile: %s", logfname);
+      }
+
+      /* set logging to be completely unbuffered */
+      setbuf(fp, NULL);
+
+      logfp = fp;
+   }
+
+   log_error(LOG_LEVEL_INFO, "Privoxy version " VERSION);
+   if (prog_name != NULL)
+   {
+      log_error(LOG_LEVEL_INFO, "Program name: %s", prog_name);
+   }
+
+   /* FIXME RACE HAZARD: should end critical section error_log_use here */
+
+} /* init_error_log */
+
+
+/*********************************************************************
+ *
+ * Function    :  log_error
+ *
+ * Description :  This is the error-reporting and logging function.
+ *
+ * Parameters  :
+ *          1  :  loglevel  = the type of message to be logged
+ *          2  :  fmt       = the main string we want logged, printf-like
+ *          3  :  ...       = arguments to be inserted in fmt (printf-like).
+ *
+ * Returns     :  N/A
+ *
+ *********************************************************************/
+void log_error(int loglevel, char *fmt, ...)
+{
+   va_list ap;
+   char *outbuf= NULL;
+   static char *outbuf_save = NULL;
+   char * src = fmt;
+   int outc = 0;
+   long this_thread = 1;  /* was: pthread_t this_thread;*/
+#ifdef __OS2__
+   PTIB     ptib;
+   APIRET   ulrc;
+#endif /* __OS2__ */
+
+#if defined(_WIN32) && !defined(_WIN_CONSOLE)
+   /*
+    * Irrespective of debug setting, a GET/POST/CONNECT makes
+    * the taskbar icon animate.  (There is an option to disable
+    * this but checking that is handled inside LogShowActivity()).
+    */
+   if (loglevel == LOG_LEVEL_GPC)
+   {
+      LogShowActivity();
+   }
+#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
+
+   /* verify if loglevel applies to current settings and bail out if negative */
+   if ((loglevel & debug) == 0)
+   {
+      return;
+   }
+
+   /* FIXME get current thread id */
+#ifdef FEATURE_PTHREAD
+   this_thread = (long)pthread_self();
+#elif defined(_WIN32)
+   this_thread = GetCurrentThreadId();
+#elif defined(__OS2__)
+   ulrc = DosGetInfoBlocks(&ptib, NULL);
+   if (ulrc == 0)
+     this_thread = ptib -> tib_ptib2 -> tib2_ultid;
+#endif /* def FEATURE_PTHREAD */
+
+   if ( !outbuf_save ) 
+   {
+      outbuf_save = outbuf = (char*)malloc(BUFFER_SIZE);
+      assert(outbuf);
+   }
+   outbuf = outbuf_save;
+
+    {
+       /*
+        * Write timestamp into tempbuf.
+        *
+        * Complex because not all OSs have tm_gmtoff or
+        * the %z field in strftime()
+        */
+       time_t now; 
+       struct tm tm_now; 
+       time (&now);
+#ifdef HAVE_LOCALTIME_R
+       tm_now = *localtime_r(&now, &tm_now);
+#else
+       tm_now = *localtime (&now); 
+#endif
+       strftime(outbuf, BUFFER_SIZE-6, "%b %d %H:%M:%S ", &tm_now); 
+       outbuf += strlen( outbuf );
+    }
+   switch (loglevel)
+   {
+      case LOG_LEVEL_ERROR:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Error: ", this_thread);
+         break;
+      case LOG_LEVEL_FATAL:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Fatal error: ", this_thread);
+         break;
+      case LOG_LEVEL_GPC:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Request: ", this_thread);
+         break;
+      case LOG_LEVEL_CONNECT:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Connect: ", this_thread);
+         break;
+      case LOG_LEVEL_LOG:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Writing: ", this_thread);
+         break;
+      case LOG_LEVEL_HEADER:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Header: ", this_thread);
+         break;
+      case LOG_LEVEL_INFO:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Info: ", this_thread);
+         break;
+      case LOG_LEVEL_RE_FILTER:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Re-Filter: ", this_thread);
+         break;
+#ifdef FEATURE_FORCE_LOAD
+      case LOG_LEVEL_FORCE:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Force: ", this_thread);
+         break;
+#endif /* def FEATURE_FORCE_LOAD */
+#ifdef FEATURE_FAST_REDIRECTS
+      case LOG_LEVEL_REDIRECTS:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Redirect: ", this_thread);
+         break;
+#endif /* def FEATURE_FAST_REDIRECTS */
+      case LOG_LEVEL_DEANIMATE:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Gif-Deanimate: ", this_thread);
+         break;
+      case LOG_LEVEL_CLF:
+         outbuf = outbuf_save;
+         outc = 0;
+         outbuf[0] = '\0';
+         break;
+#ifdef FEATURE_KILL_POPUPS
+      case LOG_LEVEL_POPUPS:
+         outc = sprintf(outbuf, "Privoxy(%05ld) Kill-Popups: ", this_thread);
+         break;
+#endif /* def FEATURE_KILL_POPUPS */
+      case LOG_LEVEL_CGI:
+         outc = sprintf(outbuf, "Privoxy(%05ld) CGI: ", this_thread);
+         break;
+      default:
+         outc = sprintf(outbuf, "Privoxy(%05ld) UNKNOWN LOG TYPE(%d): ", this_thread, loglevel);
+         break;
+   }
+   
+   /* get ready to scan var. args. */
+   va_start( ap, fmt );
+
+   /* build formatted message from fmt and var-args */
+   while ((*src) && (outc < BUFFER_SIZE-2))
+   {
+      char tempbuf[BUFFER_SIZE];
+      char *sval = NULL;
+      int ival;
+      unsigned uval;
+      long lval;
+      unsigned long ulval;
+      int oldoutc;
+      char ch;
+      
+      ch = *src++;
+      if( ch != '%' )
+      {
+         outbuf[outc++] = ch;
+         continue;
+      }
+
+      ch = *src++;
+      switch (ch) {
+         case '%':
+            outbuf[outc++] = '%';
+            break;
+         case 'd':
+            ival = va_arg( ap, int );
+            oldoutc = outc;
+            outc += sprintf(tempbuf, "%d", ival);
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, tempbuf);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'u':
+            uval = va_arg( ap, unsigned );
+            oldoutc = outc;
+            outc += sprintf(tempbuf, "%u", uval);
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, tempbuf);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'l':
+            /* this is a modifier that must be followed by u or d */
+            ch = *src++;
+            if (ch == 'd')
+            {
+               lval = va_arg( ap, long );
+               oldoutc = outc;
+               outc += sprintf(tempbuf, "%ld", lval);
+            }
+            else if (ch == 'u')
+            {
+               ulval = va_arg( ap, unsigned long );
+               oldoutc = outc;
+               outc += sprintf(tempbuf, "%lu", ulval);
+            }
+            else
+            {
+               /* Error */
+               sprintf(outbuf, "Privoxy(%ld) Error: log_error(): Bad format string:\n"
+                               "Format = \"%s\"\n"
+                               "Exiting.", this_thread, fmt);
+               /* FIXME RACE HAZARD: should start critical section error_log_use here */
+               if( !logfp )
+               {
+                  logfp = stderr;
+               }
+               fputs(outbuf, logfp);
+               /* FIXME RACE HAZARD: should end critical section error_log_use here */
+               fatal_error(outbuf);
+               /* Never get here */
+               break;
+            }
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, tempbuf);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'c':
+            /*
+             * Note that char paramaters are converted to int, so we need to
+             * pass "int" to va_arg.  (See K&R, 2nd ed, section A7.3.2, page 202)
+             */
+            outbuf[outc++] = (char) va_arg( ap, int );
+            break;
+         case 's':
+            sval = va_arg( ap, char * );
+            oldoutc = outc;
+            outc += strlen(sval);
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, sval);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'N':
+            /* Non-standard: Print a counted string.  Takes 2 parameters:
+             * int length, const char * string
+             */
+            ival = va_arg( ap, int );
+            sval = va_arg( ap, char * );
+            if (ival < 0)
+            {
+               ival = 0;
+            }
+            oldoutc = outc;
+            outc += ival;
+            if (outc < BUFFER_SIZE-1)
+            {
+               memcpy(outbuf + oldoutc, sval, (size_t) ival);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'E':
+            /* Non-standard: Print error code from errno */
+#ifdef _WIN32
+            ival = WSAGetLastError();
+            sval = w32_socket_strerr(ival, tempbuf);
+#elif __OS2__
+            ival = sock_errno();
+            if (ival != 0)
+              sval = os2_socket_strerr(ival, tempbuf);
+            else
+            {
+              ival = errno;
+              sval = strerror(ival);
+            }
+#else /* ifndef _WIN32 */
+            ival = errno; 
+#ifdef HAVE_STRERROR
+            sval = strerror(ival);
+#else /* ifndef HAVE_STRERROR */
+            sval = NULL;
+#endif /* ndef HAVE_STRERROR */
+            if (sval == NULL)
+            {
+               sprintf(tempbuf, "(errno = %d)", ival);
+               sval = tempbuf;
+            }
+#endif /* ndef _WIN32 */
+            oldoutc = outc;
+            outc += strlen(sval);
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, sval);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         case 'T':
+            /* Non-standard: Print a Common Log File timestamp */
+            {
+               /*
+                * Write timestamp into tempbuf.
+                *
+                * Complex because not all OSs have tm_gmtoff or
+                * the %z field in strftime()
+                */
+               time_t now; 
+               struct tm *tm_now; 
+               struct tm gmt;
+#ifdef HAVE_LOCALTIME_R
+               struct tm dummy;
+#endif
+               int days, hrs, mins; 
+               time (&now); 
+#ifdef HAVE_GMTIME_R
+               gmt = *gmtime_r(&now, &gmt);
+#else
+               gmt = *gmtime(&now);
+#endif
+#ifdef HAVE_LOCALTIME_R
+               tm_now = localtime_r(&now, &dummy);
+#else
+               tm_now = localtime (&now); 
+#endif
+               days = tm_now->tm_yday - gmt.tm_yday; 
+               hrs = ((days < -1 ? 24 : 1 < days ? -24 : days * 24) + tm_now->tm_hour - gmt.tm_hour); 
+               mins = hrs * 60 + tm_now->tm_min - gmt.tm_min; 
+               strftime (tempbuf, BUFFER_SIZE-6, "%d/%b/%Y:%H:%M:%S ", tm_now); 
+               sprintf (tempbuf + strlen(tempbuf), "%+03d%02d", mins / 60, abs(mins) % 60); 
+            }
+            oldoutc = outc;
+            outc += strlen(tempbuf);
+            if (outc < BUFFER_SIZE-1) 
+            {
+               strcpy(outbuf + oldoutc, tempbuf);
+            }
+            else
+            {
+               outbuf[oldoutc] = '\0';
+            }
+            break;
+         default:
+            sprintf(outbuf, "Privoxy(%ld) Error: log_error(): Bad format string:\n"
+                            "Format = \"%s\"\n"
+                            "Exiting.", this_thread, fmt);
+            /* FIXME RACE HAZARD: should start critical section error_log_use here */
+            if( !logfp )
+            {
+               logfp = stderr;
+            }
+            fputs(outbuf_save, logfp);
+            /* FIXME RACE HAZARD: should end critical section error_log_use here */
+            fatal_error(outbuf_save);
+            /* Never get here */
+            break;
+
+      } /* switch( p ) */
+
+   } /* for( p ... ) */
+   
+   /* done with var. args */
+   va_end( ap );
+   
+   if (outc >= BUFFER_SIZE-2)
+   {
+      /* insufficient room for newline and trailing null. */
+
+      static const char warning[] = "... [too long, truncated]\n";
+
+      if (outc < BUFFER_SIZE)
+      {
+         /* Need to add terminating null in this case. */
+         outbuf[outc] = '\0';
+      }
+
+      /* Truncate output */
+      outbuf[BUFFER_SIZE - sizeof(warning)] = '\0';
+
+      /* Append warning */
+      strcat(outbuf, warning);
+   }
+   else
+   {
+      /* Add terminating newline and null */
+      outbuf[outc++] = '\n';
+      outbuf[outc] = '\0';
+   }
+
+   /* FIXME RACE HAZARD: should start critical section error_log_use here */
+
+   /* deal with glibc stupidity - it won't let you initialize logfp */
+   if( !logfp )
+   {
+      logfp = stderr;
+   }
+
+   fputs(outbuf_save, logfp);
+
+   if (loglevel == LOG_LEVEL_FATAL)
+   {
+      fatal_error(outbuf_save);
+      /* Never get here */
+   }
+
+   /* FIXME RACE HAZARD: should end critical section error_log_use here */
+
+#if defined(_WIN32) && !defined(_WIN_CONSOLE)
+   /* Write to display */
+   LogPutString(outbuf_save);
+#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
+
+}
+
+
+#ifdef _WIN32
+/*********************************************************************
+ *
+ * Function    :  w32_socket_strerr
+ *
+ * Description :  Translate the return value from WSAGetLastError()
+ *                into a string.
+ *
+ * Parameters  :
+ *          1  :  errcode = The return value from WSAGetLastError().
+ *          2  :  tmp_buf = A temporary buffer that might be used to
+ *                          store the string.
+ *
+ * Returns     :  String representing the error code.  This may be
+ *                a global string constant or a string stored in
+ *                tmp_buf.
+ *
+ *********************************************************************/
+static char *w32_socket_strerr(int errcode, char *tmp_buf)
+{
+#define TEXT_FOR_ERROR(code,text) \
+   if (errcode == code)           \
+   {                              \
+      return #code " - " text;    \
+   }
+
+   TEXT_FOR_ERROR(WSAEACCES, "Permission denied")
+   TEXT_FOR_ERROR(WSAEADDRINUSE, "Address already in use.")
+   TEXT_FOR_ERROR(WSAEADDRNOTAVAIL, "Cannot assign requested address.");
+   TEXT_FOR_ERROR(WSAEAFNOSUPPORT, "Address family not supported by protocol family.");
+   TEXT_FOR_ERROR(WSAEALREADY, "Operation already in progress.");
+   TEXT_FOR_ERROR(WSAECONNABORTED, "Software caused connection abort.");
+   TEXT_FOR_ERROR(WSAECONNREFUSED, "Connection refused.");
+   TEXT_FOR_ERROR(WSAECONNRESET, "Connection reset by peer.");
+   TEXT_FOR_ERROR(WSAEDESTADDRREQ, "Destination address required.");
+   TEXT_FOR_ERROR(WSAEFAULT, "Bad address.");
+   TEXT_FOR_ERROR(WSAEHOSTDOWN, "Host is down.");
+   TEXT_FOR_ERROR(WSAEHOSTUNREACH, "No route to host.");
+   TEXT_FOR_ERROR(WSAEINPROGRESS, "Operation now in progress.");
+   TEXT_FOR_ERROR(WSAEINTR, "Interrupted function call.");
+   TEXT_FOR_ERROR(WSAEINVAL, "Invalid argument.");
+   TEXT_FOR_ERROR(WSAEISCONN, "Socket is already connected.");
+   TEXT_FOR_ERROR(WSAEMFILE, "Too many open sockets.");
+   TEXT_FOR_ERROR(WSAEMSGSIZE, "Message too long.");
+   TEXT_FOR_ERROR(WSAENETDOWN, "Network is down.");
+   TEXT_FOR_ERROR(WSAENETRESET, "Network dropped connection on reset.");
+   TEXT_FOR_ERROR(WSAENETUNREACH, "Network is unreachable.");
+   TEXT_FOR_ERROR(WSAENOBUFS, "No buffer space available.");
+   TEXT_FOR_ERROR(WSAENOPROTOOPT, "Bad protocol option.");
+   TEXT_FOR_ERROR(WSAENOTCONN, "Socket is not connected.");
+   TEXT_FOR_ERROR(WSAENOTSOCK, "Socket operation on non-socket.");
+   TEXT_FOR_ERROR(WSAEOPNOTSUPP, "Operation not supported.");
+   TEXT_FOR_ERROR(WSAEPFNOSUPPORT, "Protocol family not supported.");
+   TEXT_FOR_ERROR(WSAEPROCLIM, "Too many processes.");
+   TEXT_FOR_ERROR(WSAEPROTONOSUPPORT, "Protocol not supported.");
+   TEXT_FOR_ERROR(WSAEPROTOTYPE, "Protocol wrong type for socket.");
+   TEXT_FOR_ERROR(WSAESHUTDOWN, "Cannot send after socket shutdown.");
+   TEXT_FOR_ERROR(WSAESOCKTNOSUPPORT, "Socket type not supported.");
+   TEXT_FOR_ERROR(WSAETIMEDOUT, "Connection timed out.");
+   TEXT_FOR_ERROR(WSAEWOULDBLOCK, "Resource temporarily unavailable.");
+   TEXT_FOR_ERROR(WSAHOST_NOT_FOUND, "Host not found.");
+   TEXT_FOR_ERROR(WSANOTINITIALISED, "Successful WSAStartup not yet performed.");
+   TEXT_FOR_ERROR(WSANO_DATA, "Valid name, no data record of requested type.");
+   TEXT_FOR_ERROR(WSANO_RECOVERY, "This is a non-recoverable error.");
+   TEXT_FOR_ERROR(WSASYSNOTREADY, "Network subsystem is unavailable.");
+   TEXT_FOR_ERROR(WSATRY_AGAIN, "Non-authoritative host not found.");
+   TEXT_FOR_ERROR(WSAVERNOTSUPPORTED, "WINSOCK.DLL version out of range.");
+   TEXT_FOR_ERROR(WSAEDISCON, "Graceful shutdown in progress.");
+   /*
+    * The following error codes are documented in the Microsoft WinSock
+    * reference guide, but don't actually exist.
+    *
+    * TEXT_FOR_ERROR(WSA_INVALID_HANDLE, "Specified event object handle is invalid.");
+    * TEXT_FOR_ERROR(WSA_INVALID_PARAMETER, "One or more parameters are invalid.");
+    * TEXT_FOR_ERROR(WSAINVALIDPROCTABLE, "Invalid procedure table from service provider.");
+    * TEXT_FOR_ERROR(WSAINVALIDPROVIDER, "Invalid service provider version number.");
+    * TEXT_FOR_ERROR(WSA_IO_PENDING, "Overlapped operations will complete later.");
+    * TEXT_FOR_ERROR(WSA_IO_INCOMPLETE, "Overlapped I/O event object not in signaled state.");
+    * TEXT_FOR_ERROR(WSA_NOT_ENOUGH_MEMORY, "Insufficient memory available.");
+    * TEXT_FOR_ERROR(WSAPROVIDERFAILEDINIT, "Unable to initialize a service provider.");
+    * TEXT_FOR_ERROR(WSASYSCALLFAILURE, "System call failure.");
+    * TEXT_FOR_ERROR(WSA_OPERATION_ABORTED, "Overlapped operation aborted.");
+    */
+
+   sprintf(tmp_buf, "(error number %d)", errcode);
+   return tmp_buf;
+}
+#endif /* def _WIN32 */
+
+
+#ifdef __OS2__
+/*********************************************************************
+ *
+ * Function    :  os2_socket_strerr
+ *
+ * Description :  Translate the return value from sock_errno()
+ *                into a string.
+ *
+ * Parameters  :
+ *          1  :  errcode = The return value from sock_errno().
+ *          2  :  tmp_buf = A temporary buffer that might be used to
+ *                          store the string.
+ *
+ * Returns     :  String representing the error code.  This may be
+ *                a global string constant or a string stored in
+ *                tmp_buf.
+ *
+ *********************************************************************/
+static char *os2_socket_strerr(int errcode, char *tmp_buf)
+{
+#define TEXT_FOR_ERROR(code,text) \
+   if (errcode == code)           \
+   {                              \
+      return #code " - " text;    \
+   }
+
+   TEXT_FOR_ERROR(SOCEPERM          , "Not owner.")
+   TEXT_FOR_ERROR(SOCESRCH          , "No such process.")
+   TEXT_FOR_ERROR(SOCEINTR          , "Interrupted system call.")
+   TEXT_FOR_ERROR(SOCENXIO          , "No such device or address.")
+   TEXT_FOR_ERROR(SOCEBADF          , "Bad file number.")
+   TEXT_FOR_ERROR(SOCEACCES         , "Permission denied.")
+   TEXT_FOR_ERROR(SOCEFAULT         , "Bad address.")
+   TEXT_FOR_ERROR(SOCEINVAL         , "Invalid argument.")
+   TEXT_FOR_ERROR(SOCEMFILE         , "Too many open files.")
+   TEXT_FOR_ERROR(SOCEPIPE          , "Broken pipe.")
+   TEXT_FOR_ERROR(SOCEWOULDBLOCK    , "Operation would block.")
+   TEXT_FOR_ERROR(SOCEINPROGRESS    , "Operation now in progress.")
+   TEXT_FOR_ERROR(SOCEALREADY       , "Operation already in progress.")
+   TEXT_FOR_ERROR(SOCENOTSOCK       , "Socket operation on non-socket.")
+   TEXT_FOR_ERROR(SOCEDESTADDRREQ   , "Destination address required.")
+   TEXT_FOR_ERROR(SOCEMSGSIZE       , "Message too long.")
+   TEXT_FOR_ERROR(SOCEPROTOTYPE     , "Protocol wrong type for socket.")
+   TEXT_FOR_ERROR(SOCENOPROTOOPT    , "Protocol not available.")
+   TEXT_FOR_ERROR(SOCEPROTONOSUPPORT, "Protocol not supported.")
+   TEXT_FOR_ERROR(SOCESOCKTNOSUPPORT, "Socket type not supported.")
+   TEXT_FOR_ERROR(SOCEOPNOTSUPP     , "Operation not supported.")
+   TEXT_FOR_ERROR(SOCEPFNOSUPPORT   , "Protocol family not supported.")
+   TEXT_FOR_ERROR(SOCEAFNOSUPPORT   , "Address family not supported by protocol family.")
+   TEXT_FOR_ERROR(SOCEADDRINUSE     , "Address already in use.")
+   TEXT_FOR_ERROR(SOCEADDRNOTAVAIL  , "Can't assign requested address.")
+   TEXT_FOR_ERROR(SOCENETDOWN       , "Network is down.")
+   TEXT_FOR_ERROR(SOCENETUNREACH    , "Network is unreachable.")
+   TEXT_FOR_ERROR(SOCENETRESET      , "Network dropped connection on reset.")
+   TEXT_FOR_ERROR(SOCECONNABORTED   , "Software caused connection abort.")
+   TEXT_FOR_ERROR(SOCECONNRESET     , "Connection reset by peer.")
+   TEXT_FOR_ERROR(SOCENOBUFS        , "No buffer space available.")
+   TEXT_FOR_ERROR(SOCEISCONN        , "Socket is already connected.")
+   TEXT_FOR_ERROR(SOCENOTCONN       , "Socket is not connected.")
+   TEXT_FOR_ERROR(SOCESHUTDOWN      , "Can't send after socket shutdown.")
+   TEXT_FOR_ERROR(SOCETOOMANYREFS   , "Too many references: can't splice.")
+   TEXT_FOR_ERROR(SOCETIMEDOUT      , "Operation timed out.")
+   TEXT_FOR_ERROR(SOCECONNREFUSED   , "Connection refused.")
+   TEXT_FOR_ERROR(SOCELOOP          , "Too many levels of symbolic links.")
+   TEXT_FOR_ERROR(SOCENAMETOOLONG   , "File name too long.")
+   TEXT_FOR_ERROR(SOCEHOSTDOWN      , "Host is down.")
+   TEXT_FOR_ERROR(SOCEHOSTUNREACH   , "No route to host.")
+   TEXT_FOR_ERROR(SOCENOTEMPTY      , "Directory not empty.")
+   TEXT_FOR_ERROR(SOCEOS2ERR        , "OS/2 Error.")
+
+   sprintf(tmp_buf, "(error number %d)", errcode);
+   return tmp_buf;
+}
+#endif /* def __OS2__ */
+
+
+/*
+  Local Variables:
+  tab-width: 3
+  end:
+*/