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/**
* @file
*
* @brief Remove an Existing Link
* @ingroup libcsupport
*/
/*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#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
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