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/**
* @file
*
* @brief Read Value of a Symbolic 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.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <rtems/libio_.h>
/**
* POSIX 1003.1b - X.X.X - XXX
*/
ssize_t readlink( const char *__restrict path, char *__restrict buf,
size_t bufsize )
{
ssize_t rv = 0;
rtems_filesystem_eval_path_context_t ctx;
int eval_flags = RTEMS_FS_FOLLOW_HARD_LINK;
const rtems_filesystem_location_info_t *currentloc =
rtems_filesystem_eval_path_start( &ctx, path, eval_flags );
const rtems_filesystem_operations_table *ops = currentloc->mt_entry->ops;
rtems_filesystem_node_types_t type = (*ops->node_type_h)( currentloc );
if ( type == RTEMS_FILESYSTEM_SYM_LINK ) {
rv = (*ops->readlink_h)( currentloc, buf, bufsize );
} else {
rtems_filesystem_eval_path_error( &ctx, EINVAL );
rv = -1;
}
rtems_filesystem_eval_path_cleanup( &ctx );
return rv;
}
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