mirror of
https://github.com/MidnightCommander/mc
synced 2024-12-22 04:22:34 +03:00
164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
/*
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Provides a log file to ease tracing the program.
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Copyright (C) 2006, 2009, 2011
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The Free Software Foundation, Inc.
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Written by:
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Roland Illig <roland.illig@gmx.de>, 2006
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Slava Zanko <slavazanko@gmail.com>, 2009, 2011
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This file is part of the Midnight Commander.
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The Midnight Commander is free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of the License,
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or (at your option) any later version.
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The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file logging.c
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* \brief Source: provides a log file to ease tracing the program
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*/
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#include <config.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include "lib/global.h"
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#include "lib/mcconfig.h"
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#include "lib/fileloc.h"
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#include "logging.h"
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/*** global variables ****************************************************************************/
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/*** file scope macro definitions ****************************************************************/
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#define CONFIG_GROUP_NAME "Development"
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#define CONFIG_KEY_NAME "logging"
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#define CONFIG_KEY_NAME_FILE "logfile"
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/*** file scope type declarations ****************************************************************/
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/*** file scope variables ************************************************************************/
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static gboolean logging_initialized = FALSE;
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static gboolean logging_enabled = FALSE;
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/*** file scope functions ************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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static gboolean
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is_logging_enabled_from_env (void)
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{
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const char *env_is_enabled;
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env_is_enabled = g_getenv ("MC_LOG_ENABLE");
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if (env_is_enabled == NULL)
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return FALSE;
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logging_enabled = (*env_is_enabled == '1' || g_ascii_strcasecmp (env_is_enabled, "true") == 0);
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logging_initialized = TRUE;
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return TRUE;
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}
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/* --------------------------------------------------------------------------------------------- */
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static gboolean
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is_logging_enabled (void)
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{
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if (logging_initialized)
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return logging_enabled;
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if (is_logging_enabled_from_env ())
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return logging_enabled;
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logging_enabled =
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mc_config_get_bool (mc_main_config, CONFIG_GROUP_NAME, CONFIG_KEY_NAME, FALSE);
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logging_initialized = TRUE;
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return logging_enabled;
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}
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/* --------------------------------------------------------------------------------------------- */
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static char *
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get_log_filename (void)
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{
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const char *env_filename;
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env_filename = g_getenv ("MC_LOG_FILE");
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if (env_filename != NULL)
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return g_strdup (env_filename);
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if (mc_config_has_param (mc_main_config, CONFIG_GROUP_NAME, CONFIG_KEY_NAME_FILE))
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return mc_config_get_string (mc_main_config, CONFIG_GROUP_NAME, CONFIG_KEY_NAME_FILE, NULL);
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return mc_config_get_full_path ("mc.log");
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}
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/* --------------------------------------------------------------------------------------------- */
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static void
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mc_va_log (const char *fmt, va_list args)
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{
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char *logfilename;
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logfilename = get_log_filename ();
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if (logfilename != NULL)
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{
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FILE *f;
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f = fopen (logfilename, "a");
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if (f != NULL)
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{
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(void) vfprintf (f, fmt, args);
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(void) fclose (f);
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}
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g_free (logfilename);
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}
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}
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/* --------------------------------------------------------------------------------------------- */
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/*** public functions ****************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
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void
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mc_log (const char *fmt, ...)
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{
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va_list args;
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if (!is_logging_enabled ())
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return;
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va_start (args, fmt);
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mc_va_log (fmt, args);
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va_end (args);
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}
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/* --------------------------------------------------------------------------------------------- */
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void
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mc_always_log (const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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mc_va_log (fmt, args);
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va_end (args);
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}
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/* --------------------------------------------------------------------------------------------- */
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