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/* Translator for S_IFLNK nodes
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 <hurd.h>
#include <stdio.h>
#include <hurd/fsys.h>
#include <fcntl.h>
#include "fsys_S.h"
mach_port_t realnode;
/* We return this for O_NOLINK lookups */
mach_port_t realnodenoauth;
/* We return this for non O_NOLINK lookups */
char *linktarget;
extern int fsys_server (mach_msg_header_t *, mach_msg_header_t *);
int
main (int argc, char **argv)
{
mach_port_t bootstrap;
mach_port_t control;
error_t error;
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
{
fprintf (stderr, "%s must be started as a translator\n", argv[0]);
exit (1);
}
if (argc != 2)
{
fprintf (stderr, "Usage: %s link-target\n", argv[0]);
exit (1);
}
linktarget = argv[1];
/* Reply to our parent */
mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, &control);
error = fsys_startup (bootstrap, control,
MACH_MSG_TYPE_MAKE_SEND, &realnode);
if (error)
{
perror ("Starting up translator");
exit (1);
}
io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0);
mach_port_deallocate (mach_task_self (), realnode);
/* Launch */
while (1)
{
/* The timeout here is 10 minutes */
error = mach_msg_server_timeout (fsys_server, 0, control,
MACH_RCV_TIMEOUT, 1000 * 60 * 10);
if (error == MACH_RCV_TIMED_OUT)
exit (0);
}
}
error_t
S_fsys_getroot (mach_port_t fsys_t,
mach_port_t dotdotnode,
uid_t *uids,
u_int nuids,
uid_t *gids,
u_int ngids,
int flags,
retry_type *do_retry,
char *retry_name,
mach_port_t *ret,
mach_msg_type_name_t *rettype)
{
if (flags & O_NOLINK)
{
/* Return our underlying node. */
*ret = realnodenoauth;
*rettype = MACH_MSG_TYPE_COPY_SEND;
*do_retry = FS_RETRY_REAUTH;
retry_name[0] = '\0';
return 0;
}
else
{
/* Return telling the user to follow the link */
strcpy (retry_name, linktarget);
if (linktarget[0] == '/')
{
*do_retry = FS_RETRY_MAGICAL;
*ret = MACH_PORT_NULL;
*rettype = MACH_MSG_TYPE_COPY_SEND;
}
else
{
*do_retry = FS_RETRY_REAUTH;
*ret = dotdotnode;
*rettype = MACH_MSG_TYPE_MOVE_SEND;
}
}
return 0;
}
error_t
S_fsys_startup (mach_port_t bootstrap,
mach_port_t control,
mach_port_t *real,
mach_msg_type_name_t *realtype)
{
return EOPNOTSUPP;
}
error_t
S_fsys_goaway (mach_port_t control,
int flags)
{
exit (0);
}
error_t
S_fsys_syncfs (mach_port_t control,
int wait,
int recurse)
{
return 0;
}
error_t
S_fsys_mod_readonly (mach_port_t control,
int val,
int force)
{
return EOPNOTSUPP;
}
error_t
S_fsys_getfile (mach_port_t control,
uid_t *uids,
u_int nuids,
uid_t *gids,
u_int ngids,
char *handle,
u_int handllen,
mach_port_t *pt,
mach_msg_type_name_t *pttype)
{
return EOPNOTSUPP;
}
error_t
S_fsys_getpriv (mach_port_t control,
mach_port_t *hostpriv,
mach_port_t *devmaster,
task_t *fstask)
{
return EOPNOTSUPP;
}
error_t
S_fsys_init (mach_port_t control,
mach_port_t reply,
mach_msg_type_name_t replytype,
mach_port_t proc,
auth_t auth)
{
return EOPNOTSUPP;
}
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