Initial revision

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;
+}