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/* Make a new trivfs peropen/protid
Copyright (C) 1993, 1994, 1995, 1996, 1999 Free Software Foundation, Inc.
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 the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <string.h> /* For bcopy() */
#include "priv.h"
/* Return a new protid pointing to a new peropen in CRED, with REALNODE as
the underlying node reference, with the given identity, and open flags in
FLAGS. CNTL is the trivfs control object. */
error_t
trivfs_open (struct trivfs_control *cntl,
struct iouser *user,
unsigned flags,
mach_port_t realnode,
struct trivfs_protid **cred)
{
error_t err = 0;
struct trivfs_peropen *po = malloc (sizeof (struct trivfs_peropen));
if (!po)
return ENOMEM;
ports_port_ref (cntl);
refcount_init (&po->refcnt, 1);
po->cntl = cntl;
po->openmodes = flags;
po->hook = 0;
if (trivfs_peropen_create_hook)
err = (*trivfs_peropen_create_hook) (po);
if (!err)
{
struct trivfs_protid *new;
err = ports_create_port (cntl->protid_class, cntl->protid_bucket,
sizeof (struct trivfs_protid), &new);
if (! err)
{
new->user = user;
new->isroot = idvec_contains (user->uids, 0);
new->po = po;
new->hook = 0;
new->realnode = realnode;
if (!err && trivfs_protid_create_hook)
err = (*trivfs_protid_create_hook) (new);
if (err)
{
/* Setting REALNODE to null signals the clean routine not to
call the destroy hook, which we deallocate below anyway. */
new->realnode = MACH_PORT_NULL;
ports_port_deref (new);
}
else
*cred = new;
}
}
if (err)
{
ports_port_deref (cntl);
free (po);
}
return err;
}
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