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/*
* readlink() - POSIX 1003.1b - X.X.X - XXX
*
* 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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include "libio_.h"
int readlink(
const char *pathname,
char *buf,
int bufsize
)
{
rtems_filesystem_location_info_t loc;
int result;
if (!buf)
set_errno_and_return_minus_one( EFAULT );
result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
if ( result != 0 )
return -1;
if ( !loc.ops->node_type ){
rtems_filesystem_freenode( &loc );
set_errno_and_return_minus_one( ENOTSUP );
}
if ( (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
rtems_filesystem_freenode( &loc );
set_errno_and_return_minus_one( EINVAL );
}
if ( !loc.ops->readlink ){
rtems_filesystem_freenode( &loc );
set_errno_and_return_minus_one( ENOTSUP );
}
result = (*loc.ops->readlink)( &loc, buf, bufsize );
rtems_filesystem_freenode( &loc );
return result;
}
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