/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*/
/*
* Copyright (c) 2016 Gedare Bloom.
*
* 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 <sys/mman.h>
#include <errno.h>
#include <rtems/seterr.h>
#include <rtems/posix/shmimpl.h>
int shm_unlink( const char *name )
{
Objects_Get_by_name_error obj_err;
int err = 0;
POSIX_Shm_Control *shm;
_Objects_Allocator_lock();
shm = _POSIX_Shm_Get_by_name( name, 0, &obj_err );
if ( shm ) {
_Objects_Namespace_remove_string(
&_POSIX_Shm_Information,
&shm->Object
);
if ( shm->reference_count == 0 ) {
/* Only remove the shm object if no references exist to it. Otherwise,
* the shm object will be freed later in _POSIX_Shm_Attempt_delete */
_POSIX_Shm_Free( shm );
}
} else {
switch ( obj_err ) {
case OBJECTS_GET_BY_NAME_NAME_TOO_LONG:
err = ENAMETOOLONG;
break;
case OBJECTS_GET_BY_NAME_INVALID_NAME:
case OBJECTS_GET_BY_NAME_NO_OBJECT:
default:
err = ENOENT;
break;
}
}
_Objects_Allocator_unlock();
if ( err != 0 )
rtems_set_errno_and_return_minus_one( err );
return 0;
}
