elf/tst-auxv.c

   1 /* Copyright (C) 2013-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <elf.h>
  19 #include <errno.h>
  20 #include <link.h>
  21 #include <string.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <misc/sys/auxv.h>
  25
  26 static int
  27 do_test (int argc, char *argv[])
  28 {
  29   errno = 0;
  30   const char *execfn = (const char *) getauxval (AT_NULL);
  31
  32   if (errno != ENOENT)
  33     {
  34       printf ("errno is %d rather than %d (ENOENT) on failure\n", errno,
  35               ENOENT);
  36       return 1;
  37     }
  38
  39   if (execfn != NULL)
  40     {
  41       printf ("getauxval return value is nonzero on failure\n");
  42       return 1;
  43     }
  44
  45   errno = 0;
  46   execfn = (const char *) getauxval (AT_EXECFN);
  47
  48   if (execfn == NULL)
  49     {
  50       printf ("No AT_EXECFN found, AT_EXECFN test skipped\n");
  51       return 0;
  52     }
  53
  54   if (errno != 0)
  55     {
  56       printf ("errno erroneously set to %d on success\n", errno);
  57       return 1;
  58     }
  59
  60   if (strcmp (argv[0], execfn) != 0)
  61     {
  62       printf ("Mismatch: argv[0]: %s vs. AT_EXECFN: %s\n", argv[0], execfn);
  63       return 1;
  64     }
  65
  66   return 0;
  67 }
  68
  69 #define TEST_FUNCTION_ARGV do_test
  70 #include <support/test-driver.c>