/* Copyright (C) 2015 Red Hat, Inc.

   This file is part of elfutils.

   This file 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; either version 3 of the License, or

   (at your option) any later version.

   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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H

# include <config.h>

#endif

#include <assert.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <inttypes.h>

#include ELFUTILS_HEADER(elf)

#include ELFUTILS_HEADER(dwelf)

#include <gelf.h>

#include <stdio.h>

#include <unistd.h>

#include <string.h>

int

main (int argc, char *argv[])

{

  int result = 0;

  int cnt;

  elf_version (EV_CURRENT);

  for (cnt = 1; cnt < argc; ++cnt)

    {

      int fd = open (argv[cnt], O_RDONLY);

      Elf *elf = elf_begin (fd, ELF_C_READ, NULL);

      if (elf == NULL)

	{

	  printf ("%s not usable %s\n", argv[cnt], elf_errmsg (-1));

	  result = 1;

	  close (fd);

	  continue;

	}

      size_t shdrstrndx;

      if (elf_getshdrstrndx (elf, &shdrstrndx) == -1)

	{

	  printf ("elf_getshdrstrnd failed %s\n", elf_errmsg (-1));

	  result = 1;

	  close (fd);

	  continue;

	}

      Elf_Scn *scn = NULL;

      while ((scn = elf_nextscn (elf, scn)) != NULL)

	{

	  int idx = elf_ndxscn (scn);

	  GElf_Shdr shdr;

	  if (gelf_getshdr (scn, &shdr) == NULL)

	    {

	      printf ("gelf_getshdr failed: %s\n", elf_errmsg (-1));

	      result = 1;

	      break;

	    }

	  const char *sname = elf_strptr (elf, shdrstrndx, shdr.sh_name);

	  if (sname == NULL)

	    {

	      printf ("couldn't get section name: %s\n", elf_errmsg (-1));

	      result = 1;

	      break;

	    }

	  if (strncmp(".zdebug", sname, strlen (".zdebug")) == 0)

	    {

	      ssize_t size;

	      if ((size = dwelf_scn_gnu_compressed_size (scn)) == -1)

		{

		  printf ("dwelf_scn_gnu_compressed_size failed: %s\n",

			  elf_errmsg (-1));

		  result = 1;

		  break;

		}

	      printf ("section %d: GNU Compressed size: %zx\n", idx, size);

	    }

	}

      elf_end (elf);

      close (fd);

    }

  return result;

}