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/* Return the filesystem corresponding to a file
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "netfs.h"
#include "fsys_S.h"
error_t
netfs_S_file_getcontrol (struct protid *user,
mach_port_t *control,
mach_msg_type_name_t *controltype)
{
error_t err;
struct port_info *pi;
uid_t *uids, *gids;
int nuids, ngids;
int i;
if (!user)
return EOPNOTSUPP;
mutex_lock (&user->po->np->lock);
netfs_interpret_credential (user->credential, &uids, &nuids, &gids, &ngids);
mutex_unlock (&user->po->np->lock);
free (gids);
for (i = 0; i < nuids; i++)
if (uids[i] == 0)
{
/* They've got root; give it to them. */
free (uids);
err = ports_create_port (netfs_port_bucket,
sizeof (struct port_info),
netfs_control_class, &pi);
if (err)
return err;
*control = ports_get_right (pi);
*controltype = MACH_MSG_TYPE_MAKE_SEND;
ports_port_deref (pi);
return 0;
}
/* Not got root. */
free (uids);
return EPERM;
}
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