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File indexing completed on 2025-05-11 08:24:15

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002 
0003 /**
0004  *  @file
0005  *
0006  *  @brief Checks that the Locations Exist in the Same File System Instance
0007  *  @ingroup LibIOInternal
0008  */
0009 
0010 /*
0011  * Copyright (c) 2012 embedded brains GmbH & Co. KG
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/libio_.h>
0040 
0041 int rtems_filesystem_location_exists_in_same_instance_as(
0042   const rtems_filesystem_location_info_t *a,
0043   const rtems_filesystem_location_info_t *b
0044 )
0045 {
0046   int rv = -1;
0047 
0048   if (
0049     !rtems_filesystem_location_is_null( a )
0050       && !rtems_filesystem_location_is_null( b )
0051   ) {
0052     if ( a->mt_entry == b->mt_entry ) {
0053       rv = 0;
0054     } else {
0055       errno = EXDEV;
0056     }
0057   }
0058 
0059   return rv;
0060 }