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/*
Copyright (C) 1994 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 fs.defs:file_invoke_translator as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_invoke_translator (struct protid *cred,
int flags,
retry_type *retry,
char *retry_name,
mach_port_t *retrypt,
mach_msg_type_name_t *retrypttype)
{
error_t error = 0;
mode_t type;
struct node *np;
/* This code is very similar (but subtly different) from
dir-pathtrans.c and fsys-getroot.c. A way should be found to
combine them. */
if (!cred)
return EOPNOTSUPP;
flags &= O_HURD;
np = cred->po->np;
mutex_lock (&np->lock);
type = np->dn_stat.st_mode & S_IFMT;
repeat_transcheck:
/* Ignore O_NOTRANS in the following check */
if (diskfs_node_translated (np) || np->translator.control != MACH_PORT_NULL)
{
mach_port_t control = np->translator.control;
if (control == MACH_PORT_NULL)
{
/* This use of _diskfs_dotdot_file is completely and utterly
bogus. XXX */
if (error = diskfs_start_translator (np, _diskfs_dotdot_file))
{
mutex_unlock (&np->lock);
return error;
}
control = np->translator.control;
}
mach_port_mod_refs (mach_task_self (), control, MACH_PORT_RIGHT_SEND, 1);
mutex_unlock (&np->lock);
error = fsys_getroot (childcontrol, cred->uids, cred->nuids,
cred->gids, cred->ngids, flags, retry,
retryname, retrypt);
if (error == MACH_SEND_INVALID_DEST)
{
mutex_lock (&np->lock);
if (np->translator.control == control)
fshelp_translator_drop (&np->translator);
mach_port_deallocate (mach_task_self (), control);
error = 0;
goto repeat_transcheck;
}
if (!error && *retrypt != MACH_PORT_NULL)
*retrypttype = MACH_MSG_TYPE_MOVE_SEND;
else
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
return error;
}
/* Ignore O_NOTRANS here. */
if (type == S_IFLNK && !(flags & O_NOLINK))
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