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/* Core file generic interface routines for BFD.

   Copyright (C) 1990-2015 Free Software Foundation, Inc.

   Written by Cygnus Support.

   This file is part of BFD, the Binary File Descriptor library.

   This program 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.

   This program 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, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.  */

/*

SECTION

	Core files

SUBSECTION

	Core file functions

DESCRIPTION

	These are functions pertaining to core files.

*/

#include "sysdep.h"

#include "bfd.h"

#include "libbfd.h"

/*

FUNCTION

	bfd_core_file_failing_command

SYNOPSIS

	const char *bfd_core_file_failing_command (bfd *abfd);

DESCRIPTION

	Return a read-only string explaining which program was running

	when it failed and produced the core file @var{abfd}.

*/

const char *

bfd_core_file_failing_command (bfd *abfd)

{

  if (abfd->format != bfd_core)

    {

      bfd_set_error (bfd_error_invalid_operation);

      return NULL;

    }

  return BFD_SEND (abfd, _core_file_failing_command, (abfd));

}

/*

FUNCTION

	bfd_core_file_failing_signal

SYNOPSIS

	int bfd_core_file_failing_signal (bfd *abfd);

DESCRIPTION

	Returns the signal number which caused the core dump which

	generated the file the BFD @var{abfd} is attached to.

*/

int

bfd_core_file_failing_signal (bfd *abfd)

{

  if (abfd->format != bfd_core)

    {

      bfd_set_error (bfd_error_invalid_operation);

      return 0;

    }

  return BFD_SEND (abfd, _core_file_failing_signal, (abfd));

}

/*

FUNCTION

	bfd_core_file_pid

SYNOPSIS

	int bfd_core_file_pid (bfd *abfd);

DESCRIPTION

	Returns the PID of the process the core dump the BFD

	@var{abfd} is attached to was generated from.

*/

int

bfd_core_file_pid (bfd *abfd)

{

  if (abfd->format != bfd_core)

    {

      bfd_set_error (bfd_error_invalid_operation);

      return 0;

    }

  return BFD_SEND (abfd, _core_file_pid, (abfd));

}

/*

FUNCTION

	core_file_matches_executable_p

SYNOPSIS

	bfd_boolean core_file_matches_executable_p

	  (bfd *core_bfd, bfd *exec_bfd);

DESCRIPTION

	Return <> if the core file attached to @var{core_bfd}

	was generated by a run of the executable file attached to

	@var{exec_bfd}, <> otherwise.

*/

bfd_boolean

core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)

{

  if (core_bfd->format != bfd_core || exec_bfd->format != bfd_object)

    {

      bfd_set_error (bfd_error_wrong_format);

      return FALSE;

    }

  return BFD_SEND (core_bfd, _core_file_matches_executable_p,

		   (core_bfd, exec_bfd));

}

/*

FUNCTION

        generic_core_file_matches_executable_p

SYNOPSIS

        bfd_boolean generic_core_file_matches_executable_p

          (bfd *core_bfd, bfd *exec_bfd);

DESCRIPTION

        Return TRUE if the core file attached to @var{core_bfd}

        was generated by a run of the executable file attached

        to @var{exec_bfd}.  The match is based on executable

        basenames only.

        Note: When not able to determine the core file failing

        command or the executable name, we still return TRUE even

        though we're not sure that core file and executable match.

        This is to avoid generating a false warning in situations

        where we really don't know whether they match or not.

*/

bfd_boolean

generic_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)

{

  char *exec;

  char *core;

  char *last_slash;

  if (exec_bfd == NULL || core_bfd == NULL)

    return TRUE;

  /* The cast below is to avoid a compiler warning due to the assignment

     of the const char * returned by bfd_core_file_failing_command to a

     non-const char *.  In this case, the assignement does not lead to

     breaking the const, as we're only reading the string.  */

  core = (char *) bfd_core_file_failing_command (core_bfd);

  if (core == NULL)

    return TRUE;

  exec = bfd_get_filename (exec_bfd);

  if (exec == NULL)

    return TRUE;

  last_slash = strrchr (core, '/');

  if (last_slash != NULL)

    core = last_slash + 1;

  last_slash = strrchr (exec, '/');

  if (last_slash != NULL)

    exec = last_slash + 1;

  return filename_cmp (exec, core) == 0;

}