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/* libdiskfs implementation of fs.defs: file_getlinknode
Copyright (C) 1992, 1993, 1994 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
#include "fs_S.h"
/* Implement file_getlinknode as described in <hurd/fs.defs>. */
error_t
diskfs_S_file_getlinknode (struct protid *cred,
file_t *port,
mach_msg_type_name_t *portpoly)
{
struct node *np;
if (!cred)
return EOPNOTSUPP;
np = cred->po->np;
if (np == diskfs_root_node)
return EBUSY;
/* XXX -- this is wrong; port management code for protids
only allows a port to be given out once; we need to
send a new protid unfortunately. */
*port = cred->pi.port;
*portpoly = MACH_MSG_TYPE_MAKE_SEND;
return 0;
}
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