/* Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.
   This file is part of Red Hat elfutils.
   Written by Ulrich Drepper <drepper@redhat.com>, 1998.

   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 <error.h>
#include <fcntl.h>
#include <gelf.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>


static const char *machines[] =
{
#define MACHINE(name) [name] = #name
  MACHINE (EM_NONE),
  MACHINE (EM_M32),
  MACHINE (EM_SPARC),
  MACHINE (EM_386),
  MACHINE (EM_68K),
  MACHINE (EM_88K),
  MACHINE (EM_860),
  MACHINE (EM_MIPS),
  MACHINE (EM_MIPS_RS3_LE),
  MACHINE (EM_PARISC),
  MACHINE (EM_VPP500),
  MACHINE (EM_SPARC32PLUS),
  MACHINE (EM_960),
  MACHINE (EM_PPC),
  MACHINE (EM_PPC64),
  MACHINE (EM_V800),
  MACHINE (EM_FR20),
  MACHINE (EM_RH32),
  MACHINE (EM_RCE),
  MACHINE (EM_ARM),
  MACHINE (EM_FAKE_ALPHA),
  MACHINE (EM_SH),
  MACHINE (EM_SPARCV9),
  MACHINE (EM_TRICORE),
  MACHINE (EM_ARC),
  MACHINE (EM_H8_300),
  MACHINE (EM_H8_300H),
  MACHINE (EM_H8S),
  MACHINE (EM_H8_500),
  MACHINE (EM_IA_64),
  MACHINE (EM_MIPS_X),
  MACHINE (EM_COLDFIRE),
  MACHINE (EM_68HC12),
  MACHINE (EM_MMA),
  MACHINE (EM_PCP),
  MACHINE (EM_NCPU),
  MACHINE (EM_NDR1),
  MACHINE (EM_STARCORE),
  MACHINE (EM_ME16),
  MACHINE (EM_ST100),
  MACHINE (EM_TINYJ),
  MACHINE (EM_FX66),
  MACHINE (EM_ST9PLUS),
  MACHINE (EM_ST7),
  MACHINE (EM_68HC16),
  MACHINE (EM_68HC11),
  MACHINE (EM_68HC08),
  MACHINE (EM_68HC05),
  MACHINE (EM_SVX),
  MACHINE (EM_ST19),
  MACHINE (EM_VAX)
};


int
main (int argc, char *argv[])
{
  int fd;
  Elf *elf;
  Elf_Cmd cmd;
  size_t n;
  int arg = 1;
  int verbose = 0;

  /* Recognize optional verbosity flag.  */
  if (arg < argc && strcmp (argv[arg], "-v") == 0)
    {
      verbose = 1;
      ++arg;
    }

  /* Any more arguments available.  */
  if (arg >= argc)
    error (EXIT_FAILURE, 0, "No input file given");

  /* Open the input file.  */
  fd = open (argv[arg], O_RDONLY);
  if (fd == -1)
    {
      perror ("cannot open input file");
      exit (1);
    }

  /* Set the ELF version we are using here.  */
  if (elf_version (EV_CURRENT) == EV_NONE)
    {
      puts ("ELF library too old");
      exit (1);
    }

  /* Start reading the file.  */
  cmd = ELF_C_READ;
  elf = elf_begin (fd, cmd, NULL);
  if (elf == NULL)
    {
      printf ("elf_begin: %s\n", elf_errmsg (-1));
      exit (1);
    }

  /* If it is no archive punt.  */
  if (elf_kind (elf) != ELF_K_AR)
    {
      printf ("%s is not an archive\n", argv[1]);
      exit (1);
    }

  if (verbose)
    {
      /* The verbose variant.  We print a lot of information.  */
      Elf *subelf;
      char buf[100];
      time_t t;

      /* Get the elements of the archive one after the other.  */
      while ((subelf = elf_begin (fd, cmd, elf)) != NULL)
	{
	  /* The the header for this element.  */
	  Elf_Arhdr *arhdr = elf_getarhdr (subelf);

	  if (arhdr == NULL)
	    {
	      printf ("cannot get arhdr: %s\n", elf_errmsg (-1));
	      break;
	    }

	  switch (elf_kind (subelf))
	    {
	    case ELF_K_ELF:
	      fputs ("ELF file:\n", stdout);
	      break;

	    case ELF_K_AR:
	      fputs ("archive:\n", stdout);
	      break;

	    default:
	      fputs ("unknown file:\n", stdout);
	      break;
	    }

	  /* Print general information.  */
	  t = arhdr->ar_date;
	  strftime (buf, sizeof buf, "%Y-%m-%dT%H:%M:%S%z", gmtime (&t));
	  printf ("  name         : \"%s\"\n"
		  "  time         : %s\n"
		  "  uid          : %ld\n"
		  "  gid          : %ld\n"
		  "  mode         : %o\n"
		  "  size         : %ld\n"
		  "  rawname      : \"%s\"\n",
		  arhdr->ar_name,
		  buf,
		  (long int) arhdr->ar_uid,
		  (long int) arhdr->ar_gid,
		  arhdr->ar_mode,
		  (long int) arhdr->ar_size,
		  arhdr->ar_rawname);

	  /* For ELF files we can provide some more information.  */
	  if (elf_kind (subelf) == ELF_K_ELF)
	    {
	      GElf_Ehdr ehdr;

	      /* Get the ELF header.  */
	      if (gelf_getehdr (subelf, &ehdr) == NULL)
		printf ("  *** cannot get ELF header: %s\n", elf_errmsg (-1));
	      else
		{
		  printf ("  binary class : %s\n",
			  ehdr.e_ident[EI_CLASS] == ELFCLASS32
			  ? "ELFCLASS32" : "ELFCLASS64");
		  printf ("  data encoding: %s\n",
			  ehdr.e_ident[EI_DATA] == ELFDATA2LSB
			  ? "ELFDATA2LSB" : "ELFDATA2MSB");
		  printf ("  binary type  : %s\n",
			  ehdr.e_type == ET_REL
			  ? "relocatable"
			  : (ehdr.e_type == ET_EXEC
			     ? "executable"
			     : (ehdr.e_type == ET_DYN
				? "dynamic"
				: "core file")));
		  printf ("  machine      : %s\n",
			  (ehdr.e_machine >= (sizeof (machines)
					      / sizeof (machines[0]))
			   || machines[ehdr.e_machine] == NULL)
			  ? "???"
			  : machines[ehdr.e_machine]);
		}
	    }

	  /* Get next archive element.  */
	  cmd = elf_next (subelf);
	  if (elf_end (subelf) != 0)
	    printf ("error while freeing sub-ELF descriptor: %s\n",
		    elf_errmsg (-1));
	}
    }
  else
    {
      /* The simple version.  Only print a bit of information.  */
      Elf_Arsym *arsym = elf_getarsym (elf, &n);

      if (n == 0)
	printf ("no symbol table in archive: %s\n", elf_errmsg (-1));
      else
	{
	  --n;

	  while (n-- > 0)
	    printf ("name = \"%s\", offset = %ld, hash = %lx\n",
		    arsym[n].as_name, (long int) arsym[n].as_off,
		    arsym[n].as_hash);
	}
    }

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

  /* Close the underlying file.  */
  close (fd);

  return 0;
}