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/* Core file generic interface routines for BFD.
Copyright 1990, 1991, 1992, 1993, 1994, 2000, 2001, 2002, 2003, 2005,
2007 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 <<TRUE>> if the core file attached to @var{core_bfd}
was generated by a run of the executable file attached to
@var{exec_bfd}, <<FALSE>> 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;
}

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