tinc-vpn.org Git - tinc/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 along
  17     with this program; if not, write to the Free Software Foundation, Inc.,
  18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "system.h"
  22
  23 #include "conf.h"
  24 #include "logger.h"
  25
  26 debug_t debug_level = DEBUG_NOTHING;
  27 static logmode_t logmode = LOGMODE_STDERR;
  28 static pid_t logpid;
  29 extern char *logfilename;
  30 static FILE *logfile = NULL;
  31 #ifdef HAVE_MINGW
  32 static HANDLE loghandle = NULL;
  33 #endif
  34 static const char *logident = NULL;
  35
  36 void openlogger(const char *ident, logmode_t mode) {
  37         logident = ident;
  38         logmode = mode;
  39
  40         switch(mode) {
  41                 case LOGMODE_STDERR:
  42                         logpid = getpid();
  43                         break;
  44                 case LOGMODE_FILE:
  45                         logpid = getpid();
  46                         logfile = fopen(logfilename, "a");
  47                         if(!logfile)
  48                                 logmode = LOGMODE_NULL;
  49                         break;
  50                 case LOGMODE_SYSLOG:
  51 #ifdef HAVE_MINGW
  52                         loghandle = RegisterEventSource(NULL, logident);
  53                         if(!loghandle)
  54                                 logmode = LOGMODE_NULL;
  55                         break;
  56 #else
  57 #ifdef HAVE_SYSLOG_H
  58                         openlog(logident, LOG_CONS | LOG_PID, LOG_DAEMON);
  59                         break;
  60 #endif
  61 #endif
  62                 case LOGMODE_NULL:
  63                         break;
  64         }
  65 }
  66
  67 void logger(int priority, const char *format, ...) {
  68         va_list ap;
  69
  70         va_start(ap, format);
  71
  72         switch(logmode) {
  73                 case LOGMODE_STDERR:
  74                         vfprintf(stderr, format, ap);
  75                         fprintf(stderr, "\n");
  76                         fflush(stderr);
  77                         break;
  78                 case LOGMODE_FILE:
  79                         fprintf(logfile, "%ld %s[%ld]: ", time(NULL), logident, (long)logpid);
  80                         vfprintf(logfile, format, ap);
  81                         fprintf(logfile, "\n");
  82                         fflush(logfile);
  83                         break;
  84                 case LOGMODE_SYSLOG:
  85 #ifdef HAVE_MINGW
  86                         {
  87                                 char message[4096];
  88                                 char *messages[] = {message};
  89                                 vsnprintf(message, sizeof(message), format, ap);
  90                                 ReportEvent(loghandle, priority, 0, 0, NULL, 1, 0, messages, NULL);
  91                         }
  92 #else
  93 #ifdef HAVE_SYSLOG_H
  94 #ifdef HAVE_VSYSLOG
  95                         vsyslog(priority, format, ap);
  96 #else
  97                         {
  98                                 char message[4096];
  99                                 vsnprintf(message, sizeof(message), format, ap);
 100                                 syslog(priority, "%s", message);
 101                         }
 102 #endif
 103                         break;
 104 #endif
 105 #endif
 106                 case LOGMODE_NULL:
 107                         break;
 108         }
 109
 110         va_end(ap);
 111 }
 112
 113 void closelogger(void) {
 114         switch(logmode) {
 115                 case LOGMODE_FILE:
 116                         fclose(logfile);
 117                         break;
 118                 case LOGMODE_SYSLOG:
 119 #ifdef HAVE_MINGW
 120                         DeregisterEventSource(loghandle);
 121                         break;
 122 #else
 123 #ifdef HAVE_SYSLOG_H
 124                         closelog();
 125                         break;
 126 #endif
 127 #endif
 128                 case LOGMODE_NULL:
 129                 case LOGMODE_STDERR:
 130                         break;
 131                         break;
 132         }
 133 }