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/* Get our ids, minus any setuid result
Copyright (C) 1995,96,97,2000 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.org>
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 <errno.h>
#include <idvec.h>
#include <hurd.h>
/* Make sure that the [UG]IDS are filled in. To make them useful for
su'ing, each is the avail ids with the saved set-ID removed, and all
effective ids but the first appended; this gets rid of the effect of
being suid, and is useful as a new process's avail id list (e.g., the
real id is right). */
error_t
get_nonsugid_ids (struct idvec *uids, struct idvec *gids)
{
if (uids->num == 0 && gids->num == 0)
{
error_t err = 0;
static auth_t auth = MACH_PORT_NULL;
struct idvec *p_eff_uids = make_idvec ();
struct idvec *p_eff_gids = make_idvec ();
if (!p_eff_uids || !p_eff_gids)
err = ENOMEM;
if (auth == MACH_PORT_NULL)
auth = getauth ();
if (! err)
err = idvec_merge_auth (p_eff_uids, uids, p_eff_gids, gids, auth);
if (! err)
{
idvec_delete (p_eff_uids, 0); /* Remove effective ID from setuid. */
idvec_delete (p_eff_gids, 0);
idvec_delete (uids, 1); /* Remove saved set-ID from setuid. */
idvec_delete (gids, 1);
if (! err)
err = idvec_merge (uids, p_eff_uids);
if (! err)
err = idvec_merge (gids, p_eff_gids);
}
return err;
}
else
return 0;
}
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