src/charon/bus/listeners/sys_logger.c

   1 /*
   2  * Copyright (C) 2006 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #include <stdio.h>
  17 #include <string.h>
  18 #include <pthread.h>
  19
  20 #include "sys_logger.h"
  21
  22
  23 typedef struct private_sys_logger_t private_sys_logger_t;
  24
  25 /**
  26  * Private data of a sys_logger_t object
  27  */
  28 struct private_sys_logger_t {
  29
  30         /**
  31          * Public data.
  32          */
  33         sys_logger_t public;
  34
  35         /**
  36          * syslog facility to use
  37          */
  38         int facility;
  39
  40         /**
  41          * Maximum level to log, for each group
  42          */
  43         level_t levels[DBG_MAX];
  44 };
  45
  46 /**
  47  * Implementation of listener_t.log.
  48  */
  49 static bool log_(private_sys_logger_t *this, debug_t group, level_t level,
  50                                  int thread, ike_sa_t* ike_sa, char *format, va_list args)
  51 {
  52         if (level <= this->levels[group])
  53         {
  54                 char buffer[8192];
  55                 char *current = buffer, *next;
  56
  57                 /* write in memory buffer first */
  58                 vsnprintf(buffer, sizeof(buffer), format, args);
  59
  60                 /* do a syslog with every line */
  61                 while (current)
  62                 {
  63                         next = strchr(current, '\n');
  64                         if (next)
  65                         {
  66                                 *(next++) = '\0';
  67                         }
  68                         syslog(this->facility|LOG_INFO, "%.2d[%N] %s\n",
  69                                    thread, debug_names, group, current);
  70                         current = next;
  71                 }
  72         }
  73         /* always stay registered */
  74         return TRUE;
  75 }
  76
  77 /**
  78  * Implementation of sys_logger_t.set_level.
  79  */
  80 static void set_level(private_sys_logger_t *this, debug_t group, level_t level)
  81 {
  82         if (group < DBG_ANY)
  83         {
  84                 this->levels[group] = level;
  85         }
  86         else
  87         {
  88                 for (group = 0; group < DBG_MAX; group++)
  89                 {
  90                         this->levels[group] = level;
  91                 }
  92         }
  93 }
  94
  95 /**
  96  * Implementation of sys_logger_t.destroy.
  97  */
  98 static void destroy(private_sys_logger_t *this)
  99 {
 100         closelog();
 101         free(this);
 102 }
 103
 104 /*
 105  * Described in header.
 106  */
 107 sys_logger_t *sys_logger_create(int facility)
 108 {
 109         private_sys_logger_t *this = malloc_thing(private_sys_logger_t);
 110
 111         /* public functions */
 112         memset(&this->public.listener, 0, sizeof(listener_t));
 113         this->public.listener.log = (bool(*)(listener_t*,debug_t,level_t,int,ike_sa_t*,char*,va_list))log_;
 114         this->public.set_level = (void(*)(sys_logger_t*,debug_t,level_t))set_level;
 115         this->public.destroy = (void(*)(sys_logger_t*))destroy;
 116
 117         /* private variables */
 118         this->facility = facility;
 119         set_level(this, DBG_ANY, LEVEL_SILENT);
 120
 121         return &this->public;
 122 }