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/* bucomm.c -- Bin Utils COMmon code.

   Copyright (C) 1991-2015 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

   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.  */

/* We might put this in a library someday so it could be dynamically

   loaded, but for now it's not necessary.  */

#include "sysdep.h"

#include "bfd.h"

#include "libiberty.h"

#include "filenames.h"

#include "libbfd.h"

#include 		/* ctime, maybe time_t */

#include 

#include "bucomm.h"

#ifndef HAVE_TIME_T_IN_TIME_H

#ifndef HAVE_TIME_T_IN_TYPES_H

typedef long time_t;

#endif

#endif

static const char * endian_string (enum bfd_endian);

static int display_target_list (void);

static int display_info_table (int, int);

static int display_target_tables (void);

/* Error reporting.  */

char *program_name;

void

bfd_nonfatal (const char *string)

{

  const char *errmsg;

  errmsg = bfd_errmsg (bfd_get_error ());

  fflush (stdout);

  if (string)

    fprintf (stderr, "%s: %s: %s\n", program_name, string, errmsg);

  else

    fprintf (stderr, "%s: %s\n", program_name, errmsg);

}

/* Issue a non fatal error message.  FILENAME, or if NULL then BFD,

   are used to indicate the problematic file.  SECTION, if non NULL,

   is used to provide a section name.  If FORMAT is non-null, then it

   is used to print additional information via vfprintf.  Finally the

   bfd error message is printed.  In summary, error messages are of

   one of the following forms:

   PROGRAM:file: bfd-error-message

   PROGRAM:file[section]: bfd-error-message

   PROGRAM:file: printf-message: bfd-error-message

   PROGRAM:file[section]: printf-message: bfd-error-message.  */

void

bfd_nonfatal_message (const char *filename,

		      const bfd *abfd,

		      const asection *section,

		      const char *format, ...)

{

  const char *errmsg;

  const char *section_name;

  va_list args;

  errmsg = bfd_errmsg (bfd_get_error ());

  fflush (stdout);

  section_name = NULL;

  va_start (args, format);

  fprintf (stderr, "%s", program_name);

  if (abfd)

    {

      if (!filename)

	filename = bfd_get_archive_filename (abfd);

      if (section)

	section_name = bfd_get_section_name (abfd, section);

    }

  if (section_name)

    fprintf (stderr, ":%s[%s]", filename, section_name);

  else

    fprintf (stderr, ":%s", filename);

  if (format)

    {

      fprintf (stderr, ": ");

      vfprintf (stderr, format, args);

    }

  fprintf (stderr, ": %s\n", errmsg);

  va_end (args);

}

void

bfd_fatal (const char *string)

{

  bfd_nonfatal (string);

  xexit (1);

}

void

report (const char * format, va_list args)

{

  fflush (stdout);

  fprintf (stderr, "%s: ", program_name);

  vfprintf (stderr, format, args);

  putc ('\n', stderr);

}

void

fatal (const char *format, ...)

{

  va_list args;

  va_start (args, format);

  report (format, args);

  va_end (args);

  xexit (1);

}

void

non_fatal (const char *format, ...)

{

  va_list args;

  va_start (args, format);

  report (format, args);

  va_end (args);

}

/* Set the default BFD target based on the configured target.  Doing

   this permits the binutils to be configured for a particular target,

   and linked against a shared BFD library which was configured for a

   different target.  */

void

set_default_bfd_target (void)

{

  /* The macro TARGET is defined by Makefile.  */

  const char *target = TARGET;

  if (! bfd_set_default_target (target))

    fatal (_("can't set BFD default target to `%s': %s"),

	   target, bfd_errmsg (bfd_get_error ()));

}

/* After a FALSE return from bfd_check_format_matches with

   bfd_get_error () == bfd_error_file_ambiguously_recognized, print

   the possible matching targets.  */

void

list_matching_formats (char **p)

{

  fflush (stdout);

  fprintf (stderr, _("%s: Matching formats:"), program_name);

  while (*p)

    fprintf (stderr, " %s", *p++);

  fputc ('\n', stderr);

}

/* List the supported targets.  */

void

list_supported_targets (const char *name, FILE *f)

{

  int t;

  const char **targ_names;

  if (name == NULL)

    fprintf (f, _("Supported targets:"));

  else

    fprintf (f, _("%s: supported targets:"), name);

  targ_names = bfd_target_list ();

  for (t = 0; targ_names[t] != NULL; t++)

    fprintf (f, " %s", targ_names[t]);

  fprintf (f, "\n");

  free (targ_names);

}

/* List the supported architectures.  */

void

list_supported_architectures (const char *name, FILE *f)

{

  const char ** arch;

  const char ** arches;

  if (name == NULL)

    fprintf (f, _("Supported architectures:"));

  else

    fprintf (f, _("%s: supported architectures:"), name);

  for (arch = arches = bfd_arch_list (); *arch; arch++)

    fprintf (f, " %s", *arch);

  fprintf (f, "\n");

  free (arches);

}

/* The length of the longest architecture name + 1.  */

#define LONGEST_ARCH sizeof ("powerpc:common")

static const char *

endian_string (enum bfd_endian endian)

{

  switch (endian)

    {

    case BFD_ENDIAN_BIG: return _("big endian");

    case BFD_ENDIAN_LITTLE: return _("little endian");

    default: return _("endianness unknown");

    }

}

/* List the targets that BFD is configured to support, each followed

   by its endianness and the architectures it supports.  */

static int

display_target_list (void)

{

  char *dummy_name;

  int t;

  int ret = 1;

  dummy_name = make_temp_file (NULL);

  for (t = 0; bfd_target_vector[t]; t++)

    {

      const bfd_target *p = bfd_target_vector[t];

      bfd *abfd = bfd_openw (dummy_name, p->name);

      int a;

      printf (_("%s\n (header %s, data %s)\n"), p->name,

	      endian_string (p->header_byteorder),

	      endian_string (p->byteorder));

      if (abfd == NULL)

	{

          bfd_nonfatal (dummy_name);

          ret = 0;

	  continue;

	}

      if (! bfd_set_format (abfd, bfd_object))

	{

	  if (bfd_get_error () != bfd_error_invalid_operation)

            {

	      bfd_nonfatal (p->name);

              ret = 0;

            }

	  bfd_close_all_done (abfd);

	  continue;

	}

      for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)

	if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))

	  printf ("  %s\n",

		  bfd_printable_arch_mach ((enum bfd_architecture) a, 0));

      bfd_close_all_done (abfd);

    }

  unlink (dummy_name);

  free (dummy_name);

  return ret;

}

/* Print a table showing which architectures are supported for entries

   FIRST through LAST-1 of bfd_target_vector (targets across,

   architectures down).  */

static int

display_info_table (int first, int last)

{

  int t;

  int ret = 1;

  char *dummy_name;

  int a;

  /* Print heading of target names.  */

  printf ("\n%*s", (int) LONGEST_ARCH, " ");

  for (t = first; t < last && bfd_target_vector[t]; t++)

    printf ("%s ", bfd_target_vector[t]->name);

  putchar ('\n');

  dummy_name = make_temp_file (NULL);

  for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)

    if (strcmp (bfd_printable_arch_mach ((enum bfd_architecture) a, 0),

                "UNKNOWN!") != 0)

      {

	printf ("%*s ", (int) LONGEST_ARCH - 1,

		bfd_printable_arch_mach ((enum bfd_architecture) a, 0));

	for (t = first; t < last && bfd_target_vector[t]; t++)

	  {

	    const bfd_target *p = bfd_target_vector[t];

	    bfd_boolean ok = TRUE;

	    bfd *abfd = bfd_openw (dummy_name, p->name);

	    if (abfd == NULL)

	      {

		bfd_nonfatal (p->name);

                ret = 0;

		ok = FALSE;

	      }

	    if (ok)

	      {

		if (! bfd_set_format (abfd, bfd_object))

		  {

		    if (bfd_get_error () != bfd_error_invalid_operation)

                      {

		        bfd_nonfatal (p->name);

                        ret = 0;

                      }

		    ok = FALSE;

		  }

	      }

	    if (ok)

	      {

		if (! bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))

		  ok = FALSE;

	      }

	    if (ok)

	      printf ("%s ", p->name);

	    else

	      {

		int l = strlen (p->name);

		while (l--)

		  putchar ('-');

		putchar (' ');

	      }

	    if (abfd != NULL)

	      bfd_close_all_done (abfd);

	  }

	putchar ('\n');

      }

  unlink (dummy_name);

  free (dummy_name);

  return ret;

}

/* Print tables of all the target-architecture combinations that

   BFD has been configured to support.  */

static int

display_target_tables (void)

{

  int t;

  int columns;

  int ret = 1;

  char *colum;

  columns = 0;

  colum = getenv ("COLUMNS");

  if (colum != NULL)

    columns = atoi (colum);

  if (columns == 0)

    columns = 80;

  t = 0;

  while (bfd_target_vector[t] != NULL)

    {

      int oldt = t, wid;

      wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1;

      ++t;

      while (wid < columns && bfd_target_vector[t] != NULL)

	{

	  int newwid;

	  newwid = wid + strlen (bfd_target_vector[t]->name) + 1;

	  if (newwid >= columns)

	    break;

	  wid = newwid;

	  ++t;

	}

      if (! display_info_table (oldt, t))

        ret = 0;

    }

  return ret;

}

int

display_info (void)

{

  printf (_("BFD header file version %s\n"), BFD_VERSION_STRING);

  if (! display_target_list () || ! display_target_tables ())

    return 1;

  else

    return 0;

}

/* Display the archive header for an element as if it were an ls -l listing:

   Mode       User\tGroup\tSize\tDate               Name */

void

print_arelt_descr (FILE *file, bfd *abfd, bfd_boolean verbose)

{

  struct stat buf;

  if (verbose)

    {

      if (bfd_stat_arch_elt (abfd, &buf) == 0)

	{

	  char modebuf[11];

	  char timebuf[40];

	  time_t when = buf.st_mtime;

	  const char *ctime_result = (const char *) ctime (&when);

	  bfd_size_type size;

	  /* PR binutils/17605: Check for corrupt time values.  */

	  if (ctime_result == NULL)

	    sprintf (timebuf, _(""));

	  else

	  /* POSIX format:  skip weekday and seconds from ctime output.  */

	  sprintf (timebuf, "%.12s %.4s", ctime_result + 4, ctime_result + 20);

	  mode_string (buf.st_mode, modebuf);

	  modebuf[10] = '\0';

	  size = buf.st_size;

	  /* POSIX 1003.2/D11 says to skip first character (entry type).  */

	  fprintf (file, "%s %ld/%ld %6" BFD_VMA_FMT "u %s ", modebuf + 1,

		   (long) buf.st_uid, (long) buf.st_gid,

		   size, timebuf);

	}

    }

  fprintf (file, "%s\n", bfd_get_filename (abfd));

}

/* Return a path for a new temporary file in the same directory

   as file PATH.  */

static char *

template_in_dir (const char *path)

{

#define template "stXXXXXX"

  const char *slash = strrchr (path, '/');

  char *tmpname;

  size_t len;

#ifdef HAVE_DOS_BASED_FILE_SYSTEM

  {

    /* We could have foo/bar\\baz, or foo\\bar, or d:bar.  */

    char *bslash = strrchr (path, '\\');

    if (slash == NULL || (bslash != NULL && bslash > slash))

      slash = bslash;

    if (slash == NULL && path[0] != '\0' && path[1] == ':')

      slash = path + 1;

  }

#endif

  if (slash != (char *) NULL)

    {

      len = slash - path;

      tmpname = (char *) xmalloc (len + sizeof (template) + 2);

      memcpy (tmpname, path, len);

#ifdef HAVE_DOS_BASED_FILE_SYSTEM

      /* If tmpname is "X:", appending a slash will make it a root

	 directory on drive X, which is NOT the same as the current

	 directory on drive X.  */

      if (len == 2 && tmpname[1] == ':')

	tmpname[len++] = '.';

#endif

      tmpname[len++] = '/';

    }

  else

    {

      tmpname = (char *) xmalloc (sizeof (template));

      len = 0;

    }

  memcpy (tmpname + len, template, sizeof (template));

  return tmpname;

#undef template

}

/* Return the name of a created temporary file in the same directory

   as FILENAME.  */

char *

make_tempname (char *filename)

{

  char *tmpname = template_in_dir (filename);

  int fd;

#ifdef HAVE_MKSTEMP

  fd = mkstemp (tmpname);

#else

  tmpname = mktemp (tmpname);

  if (tmpname == NULL)

    return NULL;

  fd = open (tmpname, O_RDWR | O_CREAT | O_EXCL, 0600);

#endif

  if (fd == -1)

    {

      free (tmpname);

      return NULL;

    }

  close (fd);

  return tmpname;

}

/* Return the name of a created temporary directory inside the

   directory containing FILENAME.  */

char *

make_tempdir (char *filename)

{

  char *tmpname = template_in_dir (filename);

/*

#ifdef HAVE_MKDTEMP

  return mkdtemp (tmpname);

#else

  tmpname = mktemp (tmpname);

  if (tmpname == NULL)

    return NULL;

#if defined (_WIN32) && !defined (__CYGWIN32__)

  if (mkdir (tmpname) != 0)

    return NULL;

#else

  if (mkdir (tmpname, 0700) != 0)

    return NULL;

#endif

  return tmpname;

#endif

*/

  return NULL;

}

/* Parse a string into a VMA, with a fatal error if it can't be

   parsed.  */

bfd_vma

parse_vma (const char *s, const char *arg)

{

  bfd_vma ret;

  const char *end;

  ret = bfd_scan_vma (s, &end, 0);

  if (*end != '\0')

    fatal (_("%s: bad number: %s"), arg, s);

  return ret;

}

/* Returns the size of the named file.  If the file does not

   exist, or if it is not a real file, then a suitable non-fatal

   error message is printed and (off_t) -1 is returned.  */

off_t

get_file_size (const char * file_name)

{

  struct stat statbuf;

  if (stat (file_name, &statbuf) < 0)

    {

      if (errno == ENOENT)

	non_fatal (_("'%s': No such file"), file_name);

      else

	non_fatal (_("Warning: could not locate '%s'.  reason: %s"),

		   file_name, strerror (errno));

    }

  else if (! S_ISREG (statbuf.st_mode))

    non_fatal (_("Warning: '%s' is not an ordinary file"), file_name);

  else if (statbuf.st_size < 0)

    non_fatal (_("Warning: '%s' has negative size, probably it is too large"),

               file_name);

  else

    return statbuf.st_size;

  return (off_t) -1;

}

/* Return the filename in a static buffer.  */

const char *

bfd_get_archive_filename (const bfd *abfd)

{

  static size_t curr = 0;

  static char *buf;

  size_t needed;

  assert (abfd != NULL);

  if (!abfd->my_archive)

    return bfd_get_filename (abfd);

  needed = (strlen (bfd_get_filename (abfd->my_archive))

	    + strlen (bfd_get_filename (abfd)) + 3);

  if (needed > curr)

    {

      if (curr)

	free (buf);

      curr = needed + (needed >> 1);

      buf = (char *) bfd_malloc (curr);

      /* If we can't malloc, fail safe by returning just the file name.

	 This function is only used when building error messages.  */

      if (!buf)

	{

	  curr = 0;

	  return bfd_get_filename (abfd);

	}

    }

  sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive),

	   bfd_get_filename (abfd));

  return buf;

}

/* Returns TRUE iff PATHNAME, a filename of an archive member,

   is valid for writing.  For security reasons absolute paths

   and paths containing /../ are not allowed.  See PR 17533.  */

bfd_boolean

is_valid_archive_path (char const * pathname)

{

  const char * n = pathname;

  if (IS_ABSOLUTE_PATH (n))

    return FALSE;

  while (*n)

    {

      if (*n == '.' && *++n == '.' && ( ! *++n || IS_DIR_SEPARATOR (*n)))

	return FALSE;

      while (*n && ! IS_DIR_SEPARATOR (*n))

	n++;

      while (IS_DIR_SEPARATOR (*n))

	n++;

    }

  return TRUE;

}