diff options
| -rw-r--r-- | libshouldbeinlibc/idvec-auth.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/libshouldbeinlibc/idvec-auth.c b/libshouldbeinlibc/idvec-auth.c new file mode 100644 index 00000000..0bb28c13 --- /dev/null +++ b/libshouldbeinlibc/idvec-auth.c @@ -0,0 +1,80 @@ +/* Idvec functions that interact with an auth server + + Copyright (C) 1995 Free Software Foundation, Inc. + + Written by Miles Bader <miles@gnu.ai.mit.edu> + + 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 <mach.h> +#include <hurd/auth.h> + +#include "idvec.h" + +typedef uid_t id_t; + +/* Add to all of EFF_UIDS, AVAIL_UIDS, EFF_GIDS, AVAIL_GIDS (as if with + idvec_merge_ids()) the ids associated with the auth port AUTH. Any of + these parameters may be NULL if that information isn't desired. */ +error_t +idvec_merge_auth (struct idvec *eff_uids, struct idvec *avail_uids, + struct idvec *eff_gids, struct idvec *avail_gids, + auth_t auth) +{ + error_t err; + id_t eff_uid_buf[10], avail_uid_buf[20]; + id_t *_eff_uids = eff_uid_buf, *_avail_uids = avail_uid_buf; + int num_eff_uids = 10, num_avail_uids = 20; + id_t eff_gid_buf[10], avail_gid_buf[20]; + id_t *_eff_gids = eff_gid_buf, *_avail_gids = avail_gid_buf; + int num_eff_gids = 10, num_avail_gids = 20; + + err = auth_getids (auth, + &_eff_uids, &num_eff_uids, &_avail_uids, &num_avail_uids, + &_eff_gids, &num_eff_gids, &_avail_gids, &num_avail_gids); + if (err) + return err; + + if (eff_uids) + err = idvec_grow (eff_uids, num_eff_uids); + if (avail_uids && !err) + err = idvec_grow (avail_gids, num_avail_uids); + if (eff_uids && !err) + err = idvec_grow (eff_gids, num_eff_uids); + if (avail_gids && !err) + err = idvec_grow (avail_gids, num_avail_gids); + + if (!err) + /* Now that we've ensured there's enough space, none of these should + return an error. */ + { + idvec_merge_ids (eff_uids, _eff_uids, num_eff_uids); + idvec_merge_ids (avail_gids, _avail_gids, num_avail_uids); + idvec_merge_ids (eff_gids, _eff_gids, num_eff_uids); + idvec_merge_ids (avail_gids, _avail_gids, num_avail_gids); + } + + /* Deallocate any out-of-line memory we got back. */ + if (_eff_uids != eff_uid_buf) + vm_deallocate (mach_task_self (), (vm_address_t)_eff_uids, num_eff_uids); + if (_avail_uids != avail_uid_buf) + vm_deallocate (mach_task_self (), (vm_address_t)_avail_uids, num_avail_uids); + if (_eff_gids != eff_gid_buf) + vm_deallocate (mach_task_self (), (vm_address_t)_eff_gids, num_eff_gids); + if (_avail_gids != avail_gid_buf) + vm_deallocate (mach_task_self (), (vm_address_t)_avail_gids, num_avail_gids); + + return err; +} |