/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Remove an Existing 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>
/**
* POSIX 1003.1b - 5.5.1 - Remove an existing link
*/
int unlink( const char *path )
{
int rv = 0;
rtems_filesystem_eval_path_context_t ctx;
int eval_flags = RTEMS_FS_REJECT_TERMINAL_DOT;
rtems_filesystem_location_info_t parentloc;
int parent_eval_flags = RTEMS_FS_PERMS_WRITE
| RTEMS_FS_PERMS_EXEC
| RTEMS_FS_FOLLOW_LINK;
const rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start_with_parent(
&ctx,
path,
eval_flags,
&parentloc,
parent_eval_flags
);
if ( !rtems_filesystem_location_is_instance_root( currentloc ) ) {
const rtems_filesystem_operations_table *ops = currentloc->mt_entry->ops;
rv = (*ops->rmnod_h)( &parentloc, currentloc );
} else {
rtems_filesystem_eval_path_error( &ctx, EBUSY );
rv = -1;
}
rtems_filesystem_eval_path_cleanup_with_parent( &ctx, &parentloc );
return rv;
}
#if defined(RTEMS_NEWLIB)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of unlink().
*/
int _unlink_r(
struct _reent *ptr RTEMS_UNUSED,
const char *path
)
{
return unlink( path );
}
#endif
