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/*
Copyright (C) 1993, 1994 Free Software Foundation
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. */
/* Written by Michael I. Bushnell. */
#include "priv.h"
error_t
trivfs_S_fsys_getroot (mach_port_t fsys,
int flags,
uid_t *uids, u_int nuids,
uid_t *gids, u_int ngids,
mach_port_t *newpt,
mach_msg_type_name_t *newpttype)
{
struct protid *cred;
int i;
struct port_info *pi;
pi = ports_get_port (fsys, PT_CTL);
if (!pi)
return EOPNOTSUPP;
assert (!trivfs_support_read && !trivfs_support_write
&& !trivfs_support_exec);
if (flags & (O_READ|O_WRITE|O_EXEC))
{
ports_done_with_port (pi);
return EACCES;
}
cred = ports_allocate_port (sizeof (struct protid), PT_PROTID);
cred->isroot = 0;
for (i = 0; i < nuids; i++)
if (uids[i] == 0)
cred->isroot = 1;
io_restrict_auth (trivfs_underlying_node, &cred->realnod,
uids, nuids, gids, ngids);
*newpt = ports_get_right (cred);
*newpttype = MACH_MSG_TYPE_MAKE_SEND;
ports_done_with_port (pi);
return 0;
}
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