1  /* Copyright (C) 2013-2023 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>