tests/arsymtest.c

/* Copyright (C) 1999, 2000, 2002 Red Hat, Inc.
   This file is part of Red Hat elfutils.
   Written by Ulrich Drepper <drepper@redhat.com>, 1999.

   Red Hat elfutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by the
   Free Software Foundation; version 2 of the License.

   Red Hat elfutils 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with Red Hat elfutils; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.

   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
   license is granted, either expressly or impliedly, by designation as an
   included package.  Should you wish to participate in the Open Invention
   Network licensing program, please visit www.openinventionnetwork.com
   <http://www.openinventionnetwork.com>.  */

#include <config.h>

#include <fcntl.h>
#include <libelf.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


int
main (int argc, char *argv[])
{
  int fd;
  FILE *fp;
  Elf *elf;
  Elf_Arsym *arsym;
  size_t narsym;

  if (argc < 3)
    exit (1);

  /* Open the archive.  */
  fd = open (argv[1], O_RDONLY);
  if (fd == -1)
    {
      printf ("Cannot open input file: %m");
      exit (1);
    }

  /* Open the output file.  */
  fp = fopen (argv[2], "w");
  if (fp == NULL)
    {
      printf ("Cannot open output file: %m");
      exit (1);
    }

  /* Set the ELF version.  */
  elf_version (EV_CURRENT);

  /* Create an ELF descriptor.  */
  elf = elf_begin (fd, ELF_C_READ, NULL);
  if (elf == NULL)
    {
      printf ("Cannot create ELF descriptor: %s\n", elf_errmsg (-1));
      exit (1);
    }

  /* If it is no archive punt.  */
  if (elf_kind (elf) != ELF_K_AR)
    {
      printf ("`%s' is no archive\n", argv[1]);
      exit (1);
    }

  /* Now get the index of the archive.  */
  arsym = elf_getarsym (elf, &narsym);
  if (arsym == NULL)
    {
      printf ("Cannot get archive index: %s\n", elf_errmsg (-1));
      exit (1);
    }

  /* If there is no element in the index do nothing.  There always is
     an empty entry at the end which is included in the count and
     which we want to skip.  */
  if (narsym-- > 1)
    while (narsym-- > 0)
      {
	Elf *subelf;
	Elf_Arhdr *arhdr;

	if (elf_rand (elf, arsym[narsym].as_off) != arsym[narsym].as_off)
	  {
	    printf ("random access for symbol `%s' fails: %s\n",
		    arsym[narsym].as_name, elf_errmsg (-1));
	    exit (1);
	  }

	subelf = elf_begin (fd, ELF_C_READ, elf);
	if (subelf == NULL)
	  {
	    printf ("Cannot create ELF descriptor for archive member: %s\n",
		    elf_errmsg (-1));
	    exit (1);
	  }

	arhdr = elf_getarhdr (subelf);
	if (arhdr == NULL)
	  {
	    printf ("Cannot get archive header for element `%s': %s\n",
		    arsym[narsym].as_name, elf_errmsg (-1));
	    exit (1);
	  }

	/* Now print what we actually want.  */
	fprintf (fp, "%s in %s\n", arsym[narsym].as_name, arhdr->ar_name);

	/* Free the ELF descriptor.  */
	if (elf_end (subelf) != 0)
	  {
	    printf ("Error while freeing subELF descriptor: %s\n",
		    elf_errmsg (-1));
	    exit (1);
	  }
      }

  /* Free the ELF descriptor.  */
  if (elf_end (elf) != 0)
    {
      printf ("Error while freeing ELF descriptor: %s\n", elf_errmsg (-1));
      exit (1);
    }

  close (fd);
  fclose (fp);

  return 0;
}