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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. */
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;
main (int argc, char **argv)
{
mach_port_t bootstrap;
mach_port_t control;
_libports_initialize ();
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 */
control = ports_allocate_port (PT_CTL, sizeof (struct port_info));
error = fsys_startup (bootstrap, ports_get_right (control),
MACH_MSG_TYPE_MAKE_SEND, &realnode);
io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0);
/* Launch */
ports_manage_port_operations_onethread ();
return 0;
}
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_port_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;
}
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