blob: faea544e2988a625a5a0b56e34bc8f88c56eac8f (
plain) (
tree)
|
|
/**
* @file
*
* @brief Create a new 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>
/**
* link() - POSIX 1003.1b - 5.3.4 - Create a new link
*/
int link( const char *path1, const char *path2 )
{
int rv = 0;
rtems_filesystem_eval_path_context_t ctx_1;
rtems_filesystem_eval_path_context_t ctx_2;
int eval_flags_1 = RTEMS_FS_FOLLOW_LINK;
int eval_flags_2 = RTEMS_FS_FOLLOW_LINK
| RTEMS_FS_MAKE
| RTEMS_FS_EXCLUSIVE;
const rtems_filesystem_location_info_t *currentloc_1 =
rtems_filesystem_eval_path_start( &ctx_1, path1, eval_flags_1 );
const rtems_filesystem_location_info_t *currentloc_2 =
rtems_filesystem_eval_path_start( &ctx_2, path2, eval_flags_2 );
rv = rtems_filesystem_location_exists_in_same_instance_as(
currentloc_1,
currentloc_2
);
if ( rv == 0 ) {
rv = (*currentloc_2->mt_entry->ops->link_h)(
currentloc_2,
currentloc_1,
rtems_filesystem_eval_path_get_token( &ctx_2 ),
rtems_filesystem_eval_path_get_tokenlen( &ctx_2 )
);
}
rtems_filesystem_eval_path_cleanup( &ctx_1 );
rtems_filesystem_eval_path_cleanup( &ctx_2 );
return rv;
}
#if defined(RTEMS_NEWLIB)
#include <reent.h>
/**
* This is the Newlib dependent reentrant version of link().
*/
int _link_r(
struct _reent *ptr RTEMS_UNUSED,
const char *path1,
const char *path2
)
{
return link( path1, path2 );
}
#endif
|