log.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*****************************************************************************
   3  *
   4  *   This file is part of monster
   5  *
   6  *   Copyright (C) 2006,2007 Nedko Arnaudov <nedko@arnaudov.name>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; version 2 of the License
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  *****************************************************************************/
  22
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include <errno.h>
  27
  28 #include "log.h"
  29
  30 #define FORMATTING_BUFFER_SIZE   4096
  31
  32 void logwrite_file(const char * message)
  33 {
  34   FILE * f;
  35
  36   f = fopen("/var/log/monster.log", "a");
  37   if (f == NULL)
  38   {
  39     /* shit happens */
  40     /* we need cr because we use curses library */
  41     fprintf(stderr, "\rfailed to open/create /var/log/monster.log. error %d (%s)\r\n", errno, strerror(errno));
  42     return;
  43   }
  44
  45   fwrite(message, strlen(message), 1, f);
  46   fwrite("\n", 1, 1, f);
  47
  48   fclose(f);
  49 }
  50
  51 void logwrite_stderr(const char * message)
  52 {
  53   fwrite("\r", 1, 1, stderr);
  54   fwrite(message, strlen(message), 1, stderr);
  55   fwrite("\r\n", 2, 1, stderr); /* we need cr because we use curses library */
  56 }
  57
  58 void logwrite_va(int lvl, const char * format, va_list arglist)
  59 {
  60   char buffer[FORMATTING_BUFFER_SIZE];
  61
  62   vsnprintf(buffer, FORMATTING_BUFFER_SIZE-1, format, arglist);
  63
  64   if (lvl <= 0)
  65   {
  66     logwrite_stderr(buffer);
  67   }
  68
  69   logwrite_file(buffer);
  70 }
  71
  72 void logwrite(int lvl, const char * format, ...)
  73 {
  74   va_list arglist;
  75
  76   va_start(arglist, format);
  77   logwrite_va(lvl, format, arglist);
  78   va_end(arglist);
  79 }