static int fewf_pwrite(disk_t *disk, const void *buffer, const unsigned int count, const uint64_t offset)
{
struct info_fewf_struct *data=(struct info_fewf_struct *)disk->data;
int64_t taille;
#if defined( HAVE_LIBEWF_V2_API )
taille = libewf_handle_write_random(
data->handle,
buffer,
count,
offset,
NULL );
#else
taille=libewf_write_random(data->handle, buffer, count, offset);
#endif
if(taille!=count)
{
log_error("fewf_pwrite(xxx,%u,buffer,%lu(%u/%u/%u)) write err: ",
(unsigned)(count/disk->sector_size), (long unsigned)(offset/disk->sector_size),
offset2cylinder(disk,offset), offset2head(disk,offset), offset2sector(disk,offset));
log_error("%s\n", strerror(errno));
return -1;
}
return taille;
}
/* Writes a buffer of media data at a specific offset to EWF file(s)
* Returns a Python object holding the data if successful or NULL on error
*/
PyObject *pyewf_handle_write_random(
pyewf_handle_t *pyewf_handle,
PyObject *arguments,
PyObject *keywords )
{
char error_string[ PYEWF_ERROR_STRING_SIZE ];
liberror_error_t *error = NULL;
PyObject *result_data = NULL;
static char *function = "pyewf_handle_write_random";
static char *keyword_list[] = { "size", "offset", NULL };
off64_t write_offset = 0;
ssize_t write_count = 0;
int write_size = -1;
if( pyewf_handle == NULL )
{
PyErr_Format(
PyExc_TypeError,
"%s: invalid pyewf handle.",
function );
return( NULL );
}
if( pyewf_handle->handle == NULL )
{
PyErr_Format(
PyExc_TypeError,
"%s: invalid pyewf handle - missing libewf handle.",
function );
return( NULL );
}
if( PyArg_ParseTupleAndKeywords(
arguments,
keywords,
"i|L",
keyword_list,
&write_size,
&write_offset ) == 0 )
{
return( NULL );
}
if( write_size < 0 )
{
PyErr_Format(
PyExc_ValueError,
"%s: invalid argument read size value less than zero.",
function );
return( NULL );
}
/* Make sure the data fits into a memory buffer
*/
if( write_size > INT_MAX )
{
PyErr_Format(
PyExc_ValueError,
"%s: invalid argument read size value exceeds maximum.",
function );
return( NULL );
}
if( write_offset < 0 )
{
PyErr_Format(
PyExc_ValueError,
"%s: invalid argument write offset value less than zero.",
function );
return( NULL );
}
result_data = PyString_FromStringAndSize(
NULL,
write_size );
write_count = libewf_handle_write_random(
pyewf_handle->handle,
PyString_AsString(
result_data ),
(size_t) write_size,
write_offset,
&error );
if( write_count != (ssize_t) write_size )
{
if( liberror_error_backtrace_sprint(
error,
error_string,
PYEWF_ERROR_STRING_SIZE ) == -1 )
{
PyErr_Format(
PyExc_IOError,
"%s: unable to write data.",
function );
}
else
{
PyErr_Format(
PyExc_IOError,
"%s: unable to write data.\n%s",
function,
error_string );
}
liberror_error_free(
&error );
return( NULL );
}
return( result_data );
}
