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/**
* @file
*
* @brief Operations Table for Directories
* @ingroup IMFS
*/
/*
* COPYRIGHT (c) 1989-1999.
* 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "imfs.h"
#include <dirent.h>
static size_t IMFS_directory_size( const IMFS_jnode_t *node )
{
size_t size = 0;
const IMFS_directory_t *dir = (const IMFS_directory_t *) node;
const rtems_chain_control *chain = &dir->Entries;
const rtems_chain_node *current = rtems_chain_immutable_first( chain );
const rtems_chain_node *tail = rtems_chain_immutable_tail( chain );
while ( current != tail ) {
size += sizeof( struct dirent );
current = rtems_chain_immutable_next( current );
}
return size;
}
static int IMFS_stat_directory(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
const IMFS_jnode_t *node = loc->node_access;
buf->st_size = IMFS_directory_size( node );
return IMFS_stat( loc, buf );
}
static const rtems_filesystem_file_handlers_r IMFS_directory_handlers = {
.open_h = rtems_filesystem_default_open,
.close_h = rtems_filesystem_default_close,
.read_h = imfs_dir_read,
.write_h = rtems_filesystem_default_write,
.ioctl_h = rtems_filesystem_default_ioctl,
.lseek_h = rtems_filesystem_default_lseek_directory,
.fstat_h = IMFS_stat_directory,
.ftruncate_h = rtems_filesystem_default_ftruncate_directory,
.fsync_h = rtems_filesystem_default_fsync_or_fdatasync_success,
.fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync_success,
.fcntl_h = rtems_filesystem_default_fcntl,
.kqfilter_h = rtems_filesystem_default_kqfilter,
.poll_h = rtems_filesystem_default_poll,
.readv_h = rtems_filesystem_default_readv,
.writev_h = rtems_filesystem_default_writev
};
static IMFS_jnode_t *IMFS_node_initialize_directory(
IMFS_jnode_t *node,
void *arg
)
{
IMFS_directory_t *dir = (IMFS_directory_t *) node;
rtems_chain_initialize_empty( &dir->Entries );
return node;
}
static bool IMFS_is_mount_point( const IMFS_directory_t *dir )
{
return dir->mt_fs != NULL;
}
static IMFS_jnode_t *IMFS_node_remove_directory(
IMFS_jnode_t *node
)
{
IMFS_directory_t *dir = (IMFS_directory_t *) node;
if ( !rtems_chain_is_empty( &dir->Entries ) ) {
errno = ENOTEMPTY;
dir = NULL;
} else if ( IMFS_is_mount_point( dir ) ) {
errno = EBUSY;
dir = NULL;
}
return &dir->Node;
}
const IMFS_mknod_control IMFS_mknod_control_directory = {
{
.handlers = &IMFS_directory_handlers,
.node_initialize = IMFS_node_initialize_directory,
.node_remove = IMFS_node_remove_directory,
.node_destroy = IMFS_node_destroy_default
},
.node_size = sizeof( IMFS_directory_t )
};
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