libcsupport/src/_rename_r.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  *  @file
0005  *
0006  *  @brief Rename a File
0007  *  @ingroup libcsupport
0008  */
0009
0010 /*
0011  *  COPYRIGHT (c) 1989-2007.
0012  *  On-Line Applications Research Corporation (OAR).
0013  *
0014  *  Modifications to support reference counting in the file system are
0015  *  Copyright (c) 2012 embedded brains GmbH & Co. KG
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #if defined(RTEMS_NEWLIB) && !defined(HAVE__RENAME_R)
0044
0045 #include <stdio.h>
0046
0047 #include <rtems/libio_.h>
0048
0049 /**
0050  *  POSIX 1003.1b - 5.3.4 - Rename a file
0051  */
0052 int _rename_r(
0053   struct _reent *ptr RTEMS_UNUSED,
0054   const char    *old,
0055   const char    *new
0056 )
0057 {
0058   int rv = 0;
0059   rtems_filesystem_eval_path_context_t old_ctx;
0060   int old_eval_flags = 0;
0061   rtems_filesystem_location_info_t old_parentloc;
0062   int old_parent_eval_flags = RTEMS_FS_PERMS_WRITE
0063     | RTEMS_FS_FOLLOW_HARD_LINK;
0064   const rtems_filesystem_location_info_t *old_currentloc =
0065     rtems_filesystem_eval_path_start_with_parent(
0066       &old_ctx,
0067       old,
0068       old_eval_flags,
0069       &old_parentloc,
0070       old_parent_eval_flags
0071     );
0072   rtems_filesystem_eval_path_context_t new_ctx;
0073
0074   /* FIXME: This is not POSIX conform */
0075   int new_eval_flags = RTEMS_FS_FOLLOW_HARD_LINK
0076     | RTEMS_FS_MAKE
0077     | RTEMS_FS_EXCLUSIVE;
0078
0079   const rtems_filesystem_location_info_t *new_currentloc =
0080     rtems_filesystem_eval_path_start( &new_ctx, new, new_eval_flags );
0081
0082   rv = rtems_filesystem_location_exists_in_same_instance_as(
0083     old_currentloc,
0084     new_currentloc
0085   );
0086   if ( rv == 0 ) {
0087     rv = (*new_currentloc->mt_entry->ops->rename_h)(
0088       &old_parentloc,
0089       old_currentloc,
0090       new_currentloc,
0091       rtems_filesystem_eval_path_get_token( &new_ctx ),
0092       rtems_filesystem_eval_path_get_tokenlen( &new_ctx )
0093     );
0094   }
0095
0096   rtems_filesystem_eval_path_cleanup_with_parent( &old_ctx, &old_parentloc );
0097   rtems_filesystem_eval_path_cleanup( &new_ctx );
0098
0099   return rv;
0100 }
0101 #endif