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/*
* IMFS_stat
*
* This routine provides a stat for the IMFS file system.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* Modifications to support reference counting in the file system are
* Copyright (c) 2012 embedded brains GmbH.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "imfs.h"
#include <dirent.h>
#include <string.h>
static size_t IMFS_directory_size( const IMFS_jnode_t *the_jnode )
{
size_t size = 0;
const rtems_chain_control *chain = &the_jnode->info.directory.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;
}
int IMFS_stat(
const rtems_filesystem_location_info_t *loc,
struct stat *buf
)
{
IMFS_fs_info_t *fs_info = loc->mt_entry->fs_info;
IMFS_jnode_t *the_jnode = loc->node_access;
IMFS_device_t *io = &the_jnode->info.device;
if ( the_jnode->type == IMFS_HARD_LINK ) {
the_jnode = the_jnode->info.hard_link.link_node;
}
switch ( the_jnode->type ) {
case IMFS_DEVICE:
buf->st_rdev = rtems_filesystem_make_dev_t( io->major, io->minor );
break;
case IMFS_LINEAR_FILE:
case IMFS_MEMORY_FILE:
buf->st_size = the_jnode->info.file.size;
break;
case IMFS_DIRECTORY:
buf->st_size = IMFS_directory_size( the_jnode );
break;
case IMFS_SYM_LINK:
buf->st_size = strlen( the_jnode->info.sym_link.name );
break;
case IMFS_FIFO:
break;
default:
rtems_set_errno_and_return_minus_one( ENOTSUP );
break;
}
/*
* The device number of the IMFS is the major number and the minor is the
* instance.
*/
buf->st_dev =
rtems_filesystem_make_dev_t( IMFS_DEVICE_MAJOR_NUMBER, fs_info->instance );
buf->st_mode = the_jnode->st_mode;
buf->st_nlink = the_jnode->st_nlink;
buf->st_ino = the_jnode->st_ino;
buf->st_uid = the_jnode->st_uid;
buf->st_gid = the_jnode->st_gid;
buf->st_atime = the_jnode->stat_atime;
buf->st_mtime = the_jnode->stat_mtime;
buf->st_ctime = the_jnode->stat_ctime;
if ( the_jnode->type != IMFS_DIRECTORY ) {
buf->st_blksize = imfs_rq_memfile_bytes_per_block;
}
return 0;
}
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