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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Create a new link
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <rtems/libio_.h>
/**
* link() - POSIX 1003.1b - 5.3.4 - Create a new link
*/
int link( const char *path1, const char *path2 )
{
int rv = 0;
rtems_filesystem_eval_path_context_t ctx_1;
rtems_filesystem_eval_path_context_t ctx_2;
int eval_flags_1 = RTEMS_FS_FOLLOW_LINK;
int eval_flags_2 = RTEMS_FS_FOLLOW_LINK
| RTEMS_FS_MAKE
| RTEMS_FS_EXCLUSIVE;
const rtems_filesystem_location_info_t *currentloc_1 =
rtems_filesystem_eval_path_start( &ctx_1, path1, eval_flags_1 );
const rtems_filesystem_location_info_t *currentloc_2 =
rtems_filesystem_eval_path_start( &ctx_2, path2, eval_flags_2 );
rv = rtems_filesystem_location_exists_in_same_instance_as(
currentloc_1,
currentloc_2
);
if ( rv == 0 ) {
rv = (*currentloc_2->mt_entry->ops->link_h)(
currentloc_2,
currentloc_1,
rtems_filesystem_eval_path_get_token( &ctx_2 ),
rtems_filesystem_eval_path_get_tokenlen( &ctx_2 )
);
}
rtems_filesystem_eval_path_cleanup( &ctx_1 );
rtems_filesystem_eval_path_cleanup( &ctx_2 );
return rv;
}
#if defined(RTEMS_NEWLIB)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of link().
*/
int _link_r(
struct _reent *ptr RTEMS_UNUSED,
const char *path1,
const char *path2
)
{
return link( path1, path2 );
}
#endif
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