login/tst-utmp-unsigned.c

   1 /* Check that struct utmp, struct utmpx, struct lastlog use unsigned epoch.
   2    Copyright (C) 2024-2025 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <utmp.h>
  20 #include <utmpx.h>
  21 #include <utmp-size.h>
  22
  23 /* Undefined.  Used to check that the conditions below are optimized away.  */
  24 void link_failure_utmp (void);
  25 void link_failure_utmpx (void);
  26 void link_failure_lastlog (void);
  27
  28 static int
  29 do_test (void)
  30 {
  31   if ((struct utmp) { .ut_tv = { 0x80000000U, }, }.ut_tv.tv_sec <= 0)
  32     link_failure_utmp ();
  33   if ((struct utmpx) { .ut_tv = { 0x80000000U, }, }.ut_tv.tv_sec <= 0)
  34     link_failure_utmpx ();
  35   if ((struct lastlog) { .ll_time = 0x80000000U, }.ll_time <= 0)
  36     link_failure_lastlog ();
  37   return 0;
  38 }
  39
  40 #include <support/test-driver.c>