1 files changed, 59 insertions, 0 deletions
diff --git a/hurd/seteuids.c b/hurd/seteuids.c
new file mode 100644
index 0000000000..231dce5e4b
--- /dev/null
+++ b/hurd/seteuids.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 1993, 94, 97, 98 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <hurd.h>
+#include <hurd/id.h>
+
+/* Set the uid set for the current user to UIDS (N of them).  */
+int
+seteuids (int n, const uid_t *uids)
+{
+  error_t err;
+  auth_t newauth;
+  int i;
+  gid_t new[n];
+
+  /* Fault before taking locks.  */
+  for (i = 0; i < n; ++i)
+    new[i] = uids[i];
+
+  HURD_CRITICAL_BEGIN;
+  __mutex_lock (&_hurd_id.lock);
+  err = _hurd_check_ids ();
+  if (! err)
+    {
+      /* Get a new auth port using those IDs.  */
+      err = __USEPORT (AUTH,
+		       __auth_makeauth (port, NULL, 0, 0,
+					new, n,
+					_hurd_id.aux.uids, _hurd_id.aux.nuids,
+					_hurd_id.gen.gids, _hurd_id.gen.ngids,
+					_hurd_id.aux.gids, _hurd_id.aux.ngids,
+					&newauth));
+    }
+  __mutex_unlock (&_hurd_id.lock);
+  HURD_CRITICAL_END;
+
+  if (err)
+    return __hurd_fail (err);
+
+  /* Install the new auth port and reauthenticate everything.  */
+  err = __setauth (newauth);
+  __mach_port_deallocate (__mach_task_self (), newauth);
+  return err;
+}