git.meshlink.io Git - meshlink/blob - src/logger.c

   1 /*
   2     logger.c -- logging code
   3     Copyright (C) 2004-2006 Guus Sliepen <guus@tinc-vpn.org>
   4                   2004-2005 Ivo Timmermans
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20     $Id$
  21 */
  22
  23 #include "system.h"
  24
  25 #include "conf.h"
  26 #include "logger.h"
  27
  28 debug_t debug_level = DEBUG_NOTHING;
  29 static logmode_t logmode = LOGMODE_STDERR;
  30 static pid_t logpid;
  31 extern char *logfilename;
  32 static FILE *logfile = NULL;
  33 #ifdef HAVE_MINGW
  34 static HANDLE loghandle = NULL;
  35 #endif
  36 static const char *logident = NULL;
  37
  38 void openlogger(const char *ident, logmode_t mode) {
  39         logident = ident;
  40         logmode = mode;
  41
  42         switch(mode) {
  43                 case LOGMODE_STDERR:
  44                         logpid = getpid();
  45                         break;
  46                 case LOGMODE_FILE:
  47                         logpid = getpid();
  48                         logfile = fopen(logfilename, "a");
  49                         if(!logfile)
  50                                 logmode = LOGMODE_NULL;
  51                         break;
  52                 case LOGMODE_SYSLOG:
  53 #ifdef HAVE_MINGW
  54                         loghandle = RegisterEventSource(NULL, logident);
  55                         if(!loghandle)
  56                                 logmode = LOGMODE_NULL;
  57                         break;
  58 #else
  59 #ifdef HAVE_SYSLOG_H
  60                         openlog(logident, LOG_CONS | LOG_PID, LOG_DAEMON);
  61                         break;
  62 #endif
  63 #endif
  64                 case LOGMODE_NULL:
  65                         break;
  66         }
  67 }
  68
  69 void logger(int priority, const char *format, ...) {
  70         va_list ap;
  71
  72         va_start(ap, format);
  73
  74         switch(logmode) {
  75                 case LOGMODE_STDERR:
  76                         vfprintf(stderr, format, ap);
  77                         fprintf(stderr, "\n");
  78                         fflush(stderr);
  79                         break;
  80                 case LOGMODE_FILE:
  81                         fprintf(logfile, "%ld %s[%ld]: ", time(NULL), logident, (long)logpid);
  82                         vfprintf(logfile, format, ap);
  83                         fprintf(logfile, "\n");
  84                         fflush(logfile);
  85                         break;
  86                 case LOGMODE_SYSLOG:
  87 #ifdef HAVE_MINGW
  88                         {
  89                                 char message[4096];
  90                                 char *messages[] = {message};
  91                                 vsnprintf(message, sizeof(message), format, ap);
  92                                 ReportEvent(loghandle, priority, 0, 0, NULL, 1, 0, messages, NULL);
  93                         }
  94 #else
  95 #ifdef HAVE_SYSLOG_H
  96 #ifdef HAVE_VSYSLOG
  97                         vsyslog(priority, format, ap);
  98 #else
  99                         {
 100                                 char message[4096];
 101                                 vsnprintf(message, sizeof(message), format, ap);
 102                                 syslog(priority, "%s", message);
 103                         }
 104 #endif
 105                         break;
 106 #endif
 107 #endif
 108                 case LOGMODE_NULL:
 109                         break;
 110         }
 111
 112         va_end(ap);
 113 }
 114
 115 void closelogger(void) {
 116         switch(logmode) {
 117                 case LOGMODE_FILE:
 118                         fclose(logfile);
 119                         break;
 120                 case LOGMODE_SYSLOG:
 121 #ifdef HAVE_MINGW
 122                         DeregisterEventSource(loghandle);
 123                         break;
 124 #else
 125 #ifdef HAVE_SYSLOG_H
 126                         closelog();
 127                         break;
 128 #endif
 129 #endif
 130                 case LOGMODE_NULL:
 131                 case LOGMODE_STDERR:
 132                         break;
 133                         break;
 134         }
 135 }