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/*
Copyright (C) 1994, 1995, 1996 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"
#include <fcntl.h>
/* Implement fs.defs:file_invoke_translator as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_invoke_translator (struct protid *cred __attribute__ ((unused)),
int flags __attribute__ ((unused)),
retry_type *retry __attribute__ ((unused)),
char *retry_name __attribute__ ((unused)),
mach_port_t *retrypt __attribute__ ((unused)),
mach_msg_type_name_t *retrypttype
__attribute__ ((unused)))
{
#if 0
/* XXX */
static mach_port_t _diskfs_dotdot_file = MACH_PORT_NULL;
error_t error = 0;
mode_t type;
struct node *np;
struct protid *newpi;
/* 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 (np->istranslated || 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 (control, cred->uids, cred->nuids,
cred->gids, cred->ngids, flags, retry,
retry_name, 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))
{
/* Handle symlink interpretation */
char pathbuf[np->dn_stat.st_size + 1];
int amt;
if (diskfs_read_symlink_hook)
error = (*diskfs_read_symlink_hook) (np, pathbuf);
if (!diskfs_read_symlink_hook || error == EINVAL)
error = diskfs_node_rdwr (np, pathbuf, 0, np->dn_stat.st_size, 0,
0, &amt);
pathbuf[amt] = '\0';
mutex_unlock (&np->lock);
if (error)
return error;
if (pathbuf[0] == '/')
{
*retry = FS_RETRY_MAGICAL;
*retrypt = MACH_PORT_NULL;
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
else
{
*retry = FS_RETRY_REAUTH;
*retrypt = _diskfs_dotdot_file;
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
}
if ((type == S_IFSOCK || type == S_IFBLK
|| type == S_IFCHR || type == S_IFIFO)
&& (flags & (O_READ|O_WRITE|O_EXEC)))
error = EOPNOTSUPP;
flags &= ~OPENONLY_STATE_MODES;
error = diskfs_create_protid (diskfs_make_peropen (np, flags,
_diskfs_dotdot_file),
cred->uids, cred->nuids,
cred->gids, cred->ngids,
&newpi);
if (! error)
{
*retry = FS_RETRY_NONE;
retry_name[0] = '\0';
*retrypt = ports_get_right (newpi);
*retrypttype = MACH_MSG_TYPE_MAKE_SEND;
ports_port_deref (newpi);
}
mutex_unlock (&np->lock);
return error;
#else
return EOPNOTSUPP;
#endif
}
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