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/*
* rtems_filesystem_evaluate_path()
*
* Routine to seed the evaluate path routine.
*
* 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.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems.h>
#include <rtems/libio_.h>
#include <rtems/seterr.h>
int rtems_filesystem_evaluate_path(
const char *pathname,
int flags,
rtems_filesystem_location_info_t *pathloc,
int follow_link
)
{
int i;
int result;
rtems_filesystem_node_types_t type;
/*
* Verify Input parameters.
*/
if ( !pathname )
rtems_set_errno_and_return_minus_one( EFAULT );
if ( !pathloc )
rtems_set_errno_and_return_minus_one( EIO ); /* should never happen */
/*
* Evaluate the path using the optable evalpath.
*/
rtems_filesystem_get_start_loc( pathname, &i, pathloc );
if ( !pathloc->ops->evalpath_h )
rtems_set_errno_and_return_minus_one( ENOTSUP );
result = (*pathloc->ops->evalpath_h)( &pathname[i], flags, pathloc );
/*
* Get the Node type and determine if you need to follow the link or
* not.
*/
if ( (result == 0) && follow_link ) {
if ( !pathloc->ops->node_type_h ){
rtems_filesystem_freenode( pathloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
type = (*pathloc->ops->node_type_h)( pathloc );
if ( ( type == RTEMS_FILESYSTEM_HARD_LINK ) ||
( type == RTEMS_FILESYSTEM_SYM_LINK ) ) {
if ( !pathloc->ops->eval_link_h ){
rtems_filesystem_freenode( pathloc );
rtems_set_errno_and_return_minus_one( ENOTSUP );
}
/* what to do with the valid node pathloc points to
* if eval_link_h fails?
* Let the FS implementation deal with this case. It
* should probably free pathloc in either case:
* - if the link evaluation fails, it must free the
* original (valid) pathloc because we are going
* to return -1 and hence the FS generics won't
* cleanup pathloc.
* - if the link evaluation is successful, the updated
* pathloc will be passed up (and eventually released).
* Hence, the (valid) originial node that we submit to
* eval_link_h() should be released by the handler.
*/
result = (*pathloc->ops->eval_link_h)( pathloc, flags );
}
}
return result;
}
int rtems_filesystem_evaluate_parent(
int flags,
rtems_filesystem_location_info_t *pathloc
)
{
rtems_filesystem_location_info_t parent;
int result;
if ( !pathloc )
rtems_set_errno_and_return_minus_one( EIO ); /* should never happen */
if ( !pathloc->ops->evalpath_h )
rtems_set_errno_and_return_minus_one( ENOTSUP );
parent = *pathloc;
result = (*pathloc->ops->evalpath_h)( "..", flags, &parent );
if (result != 0){
return -1;
}
rtems_filesystem_freenode( &parent );
return result;
}
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