sysdeps/unix/sysv/linux/tst-personality.c

   1 /* BZ #19408 linux personality syscall wrapper test.
   2
   3    Copyright (C) 2015-2024 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <errno.h>
  21 #include <sys/personality.h>
  22 #include <support/check.h>
  23
  24 static int
  25 do_test (void)
  26 {
  27   unsigned int test_persona = -EINVAL;
  28   unsigned int saved_persona;
  29
  30   errno = 0xdefaced;
  31   saved_persona = personality (0xffffffff);
  32
  33   unsigned int r = personality (test_persona);
  34   if (r == -1)
  35     {
  36       /* The syscall argument might be filtered by kernel, so the
  37         test can not check for the bug issue.  */
  38       if (errno == EPERM)
  39        FAIL_UNSUPPORTED ("personality syscall argument are filtered");
  40       FAIL_EXIT1 ("personality (%#x) failed: %m", test_persona);
  41     }
  42
  43   TEST_COMPARE (r, saved_persona);
  44   TEST_VERIFY (personality (0xffffffff) != -1);
  45   TEST_VERIFY (personality (PER_LINUX) != -1);
  46   TEST_COMPARE (personality (0xffffffff), PER_LINUX);
  47   TEST_COMPARE (0xdefaced, errno);
  48
  49   personality (saved_persona);
  50
  51   return 0;
  52 }
  53
  54 #include <support/test-driver.c>