src/imfs/imfs_dir.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup IMFS
0007  */
0008
0009 /*
0010  *  COPYRIGHT (c) 1989-1999.
0011  *  On-Line Applications Research Corporation (OAR).
0012  *
0013  * Redistribution and use in source and binary forms, with or without
0014  * modification, are permitted provided that the following conditions
0015  * are met:
0016  * 1. Redistributions of source code must retain the above copyright
0017  *    notice, this list of conditions and the following disclaimer.
0018  * 2. Redistributions in binary form must reproduce the above copyright
0019  *    notice, this list of conditions and the following disclaimer in the
0020  *    documentation and/or other materials provided with the distribution.
0021  *
0022  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0023  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0024  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0025  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0026  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0027  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0028  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0029  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0030  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0031  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0032  * POSSIBILITY OF SUCH DAMAGE.
0033  */
0034
0035 #ifdef HAVE_CONFIG_H
0036 #include "config.h"
0037 #endif
0038
0039 #include <rtems/imfs.h>
0040
0041 IMFS_jnode_t *IMFS_node_initialize_directory(
0042   IMFS_jnode_t *node,
0043   void *arg
0044 )
0045 {
0046   IMFS_directory_t *dir = (IMFS_directory_t *) node;
0047
0048   rtems_chain_initialize_empty( &dir->Entries );
0049
0050   return node;
0051 }
0052
0053 static bool IMFS_is_mount_point( const IMFS_directory_t *dir )
0054 {
0055   return dir->mt_fs != NULL;
0056 }
0057
0058 IMFS_jnode_t *IMFS_node_remove_directory( IMFS_jnode_t *node )
0059 {
0060   IMFS_directory_t *dir = (IMFS_directory_t *) node;
0061
0062   if ( !rtems_chain_is_empty( &dir->Entries ) ) {
0063     errno = ENOTEMPTY;
0064     dir = NULL;
0065   } else if ( IMFS_is_mount_point( dir ) ) {
0066     errno = EBUSY;
0067     dir = NULL;
0068   }
0069
0070   return &dir->Node;
0071 }