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/*
Copyright (C) 1999 Free Software Foundation
Written by Thomas Bushnell, BSG.
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 "netfs.h"
#include "io_S.h"
/* Implement io_revoke as described in <hurd/io.defs>. */
kern_return_t
netfs_S_io_revoke (struct protid *cred)
{
error_t err;
struct node *np;
error_t
iterator_function (void *port)
{
struct protid *user = port;
if ((user.pi.class == netfs_protid_class)
&& (user != cred)
&& (user->po->np == np))
ports_destroy_right (user);
return 0;
}
if (!cred)
return EOPNOTSUPP;
np = cred->po->np;
mutex_lock (&np->lock);
err = netfs_validate_stat (np, cred);
if (!err)
err = fshelp_isowner (&np->dn_stat, cred->user);
if (err)
{
mutex_unlock (&np->lock);
return err;
}
ports_bucket_iterate (netfs_port_bucket, iterator_function);
mutex_unlock (&np->lock);
return 0;
}
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