lib/logging.c

   1 /*
   2    Provides a log file to ease tracing the program.
   3
   4    Copyright (C) 2006, 2009 Free Software Foundation, Inc.
   5
   6    Written: 2006 Roland Illig <roland.illig@gmx.de>.
   7
   8    This file is part of the Midnight Commander.
   9
  10    The Midnight Commander is free software; you can redistribute it
  11    and/or modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2 of the
  13    License, or (at your option) any later version.
  14
  15    The Midnight Commander is distributed in the hope that it will be
  16    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  17    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  23    MA 02110-1301, USA.
  24  */
  25
  26 /** \file logging.c
  27  *  \brief Source: provides a log file to ease tracing the program
  28  */
  29
  30 #include <config.h>
  31
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34
  35 #include "lib/global.h"
  36 #include "logging.h"
  37 #include "lib/mcconfig.h"
  38 #include "lib/fileloc.h"
  39
  40 #include "src/setup.h"
  41
  42 /*** file scope functions **********************************************/
  43
  44 static gboolean
  45 is_logging_enabled(void)
  46 {
  47         static gboolean logging_initialized = FALSE;
  48         static gboolean logging_enabled = FALSE;
  49
  50         if (!logging_initialized) {
  51                 logging_enabled = mc_config_get_int (mc_main_config,
  52                         CONFIG_APP_SECTION, "development.enable_logging", FALSE);
  53                 logging_initialized = TRUE;
  54         }
  55         return logging_enabled;
  56 }
  57
  58 /*** public functions **************************************************/
  59
  60 void
  61 mc_log(const char *fmt, ...)
  62 {
  63         va_list args;
  64         FILE *f;
  65         char *logfilename;
  66
  67         if (is_logging_enabled()) {
  68                 va_start(args, fmt);
  69                 logfilename = g_strdup_printf("%s/%s/log", home_dir, MC_USERCONF_DIR);
  70                 if (logfilename != NULL) {
  71                     f = fopen (logfilename, "a");
  72                     if (f != NULL) {
  73                         (void)vfprintf(f, fmt, args);
  74                         (void)fclose(f);
  75                     }
  76                     g_free(logfilename);
  77                     va_end(args);
  78                 }
  79         }
  80 }