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/**
* @file
*
* @brief IMFS Rename
* @ingroup IMFS
*/
/*
* COPYRIGHT (c) 1989-2010.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/imfs.h>
#include <string.h>
#include <stdlib.h>
typedef struct {
IMFS_node_control Base;
const IMFS_node_control *replaced;
char name[ RTEMS_ZERO_LENGTH_ARRAY ];
} IMFS_renamed_control;
static void IMFS_restore_replaced_control( IMFS_jnode_t *node )
{
const IMFS_node_control *base;
IMFS_renamed_control *control;
base = RTEMS_DECONST( IMFS_node_control *, node->control );
control = (IMFS_renamed_control *) base;
node->control = control->replaced;
free( control );
}
static void IMFS_renamed_destroy( IMFS_jnode_t *node )
{
IMFS_restore_replaced_control( node );
( *node->control->node_destroy )( node );
}
int IMFS_rename(
const rtems_filesystem_location_info_t *oldparentloc,
const rtems_filesystem_location_info_t *oldloc,
const rtems_filesystem_location_info_t *newparentloc,
const char *name,
size_t namelen
)
{
IMFS_jnode_t *node;
IMFS_jnode_t *new_parent;
IMFS_renamed_control *control;
/*
* FIXME: Due to insufficient checks we can create inaccessible nodes with
* this operation.
*/
node = oldloc->node_access;
new_parent = newparentloc->node_access;
if ( node->Parent == NULL ) {
rtems_set_errno_and_return_minus_one( EINVAL );
}
if ( namelen >= IMFS_NAME_MAX ) {
rtems_set_errno_and_return_minus_one( ENAMETOOLONG );
}
control = malloc( sizeof( *control ) + namelen );
if ( control == NULL ) {
rtems_set_errno_and_return_minus_one( ENOMEM );
}
memcpy( control->name, name, namelen );
if ( node->control->node_destroy == IMFS_renamed_destroy ) {
IMFS_restore_replaced_control( node );
}
control->Base = *node->control;
control->Base.node_destroy = IMFS_renamed_destroy;
control->replaced = node->control;
node->control = &control->Base;
node->name = control->name;
node->namelen = namelen;
IMFS_remove_from_directory( node );
IMFS_add_to_directory( new_parent, node );
IMFS_update_ctime( node );
return 0;
}
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