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/*
* Notification stream functions
*
* Copyright (C) 2008-2018, Joachim Metz <joachim.metz@gmail.com>
*
* Refer to AUTHORS for acknowledgements.
*
* This software is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <file_stream.h>
#include <types.h>
#if defined( HAVE_ERRNO_H ) || defined( WINAPI )
#include <errno.h>
#endif
#include "libcnotify_libcerror.h"
#include "libcnotify_stream.h"
/* The notification stream
*/
FILE *libcnotify_stream = NULL;
/* Value to indicate if the notification stream
* was opened by the library
*/
int libcnotify_stream_opened_in_library = 0;
/* Set the stream
* Returns 1 if successful or -1 on error
*/
int libcnotify_stream_set(
FILE *stream,
libcerror_error_t **error )
{
static char *function = "libcnotify_stream_set";
if( libcnotify_stream_opened_in_library != 0 )
{
if( libcnotify_stream_close(
error ) != 0 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_OPEN_FAILED,
"%s: unable to close notify stream.",
function );
return( -1 );
}
}
libcnotify_stream = stream;
return( 1 );
}
/* Opens the notification stream using a filename
* The stream is opened in append mode
* Returns 1 if successful or -1 on error
*/
int libcnotify_stream_open(
const char *filename,
libcerror_error_t **error )
{
static char *function = "libcnotify_stream_open";
if( filename == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid filename.",
function );
return( -1 );
}
if( libcnotify_stream_opened_in_library != 0 )
{
if( libcnotify_stream_close(
error ) != 0 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_OPEN_FAILED,
"%s: unable to close notify stream.",
function );
return( -1 );
}
}
libcnotify_stream = file_stream_open(
filename,
FILE_STREAM_OPEN_APPEND );
if( libcnotify_stream == NULL )
{
switch( errno )
{
case EACCES:
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_ACCESS_DENIED,
"%s: access denied to file: %s.",
function,
filename );
break;
case ENOENT:
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_INVALID_RESOURCE,
"%s: no such file: %s.",
function,
filename );
break;
default:
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_OPEN_FAILED,
"%s: unable to open file: %s.",
function,
filename );
break;
}
return( -1 );
}
libcnotify_stream_opened_in_library = 1;
return( 1 );
}
/* Closes the notification stream if opened using a filename
* Returns 0 if successful or -1 on error
*/
int libcnotify_stream_close(
libcerror_error_t **error )
{
static char *function = "libcnotify_stream_close";
if( libcnotify_stream_opened_in_library != 0 )
{
if( file_stream_close(
libcnotify_stream ) != 0 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_IO,
LIBCERROR_IO_ERROR_OPEN_FAILED,
"%s: unable to close stream.",
function );
return( -1 );
}
libcnotify_stream = NULL;
libcnotify_stream_opened_in_library = 0;
}
return( 0 );
}
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