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/* libdiskfs implementation of fs.defs:file_getcontrol.c
Copyright (C) 1992, 1993, 1994, 1995 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_getcontrol as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_getcontrol (struct protid *cred,
mach_port_t *control,
mach_msg_type_name_t *controltype)
{
int error = 0;
struct port_info *newpi;
if (!cred)
return EOPNOTSUPP;
if (!diskfs_isuid (0, cred))
error = EPERM;
else
{
spin_lock (&_diskfs_control_lock);
_diskfs_ncontrol_ports++;
spin_unlock (&_diskfs_control_lock);
newpi = ports_allocate_port (diskfs_port_bucket,
sizeof (struct port_info),
diskfs_control_class);
*control = ports_get_right (newpi);
*controltype = MACH_MSG_TYPE_MAKE_SEND;
ports_port_deref (newpi);
}
return error;
}
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