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/*

 *  IMFS_link

 *

 *  The following rouine creates a new link node under parent with the

 *  name given in name.  The link node is set to point to the node at

 *  to_loc.

 *

 *  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.

 *

 *  imfs_link.c,v 1.7 2002/01/04 18:30:58 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <errno.h>

#include "imfs.h"

#include <rtems/libio_.h>

#include <rtems/seterr.h>

int IMFS_link(

  rtems_filesystem_location_info_t  *to_loc,      /* IN */

  rtems_filesystem_location_info_t  *parent_loc,  /* IN */

  const char                        *token        /* IN */

)

{

  IMFS_types_union   info;

  IMFS_jnode_t      *new_node;

  char               new_name[ IMFS_NAME_MAX + 1 ];

  int                i;

  /*

   *  Verify this node can be linked to.

   */

  info.hard_link.link_node = to_loc->node_access;

  if ( info.hard_link.link_node->st_nlink >= LINK_MAX )

    rtems_set_errno_and_return_minus_one( EMLINK );

  /*

   * Remove any separators at the end of the string.

   */

  IMFS_get_token( token, new_name, &i );

  /*

   *  Create a new link node.

   */

  new_node = IMFS_create_node(

    parent_loc,

    IMFS_HARD_LINK,

    new_name,

    ( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),

    &info

  );

  if ( !new_node )

    rtems_set_errno_and_return_minus_one( ENOMEM );

  /*

   * Increment the link count of the node being pointed to.

   */

  info.hard_link.link_node->st_nlink++;

  IMFS_update_ctime( info.hard_link.link_node );

  return 0;

}