fc.def

android-w.song.android.widget

    }

  /* "When not listing, the fc command that caused the editing shall not be
     entered into the history list." */
  if (listing == 0 && hist_last_line_added)
    {
      bash_delete_last_history ();
      /* If we're editing a single command -- the last command in the
	 history -- and we just removed the dummy command added by
	 edit_and_execute_command (), we need to check whether or not we
	 just removed the last command in the history and need to back
	 the pointer up.  remember_on_history is off because we're running
	 in parse_and_execute(). */
      if (histbeg == histend && histend == last_hist && hlist[last_hist] == 0)
	last_hist = histbeg = --histend;
    }

  /* We print error messages for line specifications out of range. */
  if ((histbeg < 0) || (histend < 0))
    {
      sh_erange ((char *)NULL, _("history specification"));
      return (EXECUTION_FAILURE);
    }

  if (histend < histbeg)
    {
      i = histend;
      histend = histbeg;
      histbeg = i;

      reverse = 1;
    }

  if (listing)
    stream = stdout;
  else
    {
      numbering = 0;
      stream = sh_mktmpfp ("bash-fc", MT_USERANDOM|MT_USETMPDIR, &fn);
      if (stream == 0)
	{
	  builtin_error (_("%s: cannot open temp file: %s"), fn ? fn : "", strerror (errno));
	  FREE (fn);
	  return (EXECUTION_FAILURE);
	}
    }

  for (i = reverse ? histend : histbeg; reverse ? i >= histbeg : i <= histend; reverse ? i-- : i++)
    {
      QUIT;
      if (numbering)
	fprintf (stream, "%d", i + history_base);
      if (listing)
	{
	  if (posixly_correct)
	    fputs ("\t", stream);
	  else
	    fprintf (stream, "\t%c", histdata (i) ? '*' : ' ');
	}
      fprintf (stream, "%s\n", histline (i));
    }

  if (listing)
    return (sh_chkwrite (EXECUTION_SUCCESS));

  fflush (stream);
  if (ferror (stream))
    {
      sh_wrerror ();
      fclose (stream);
      return (EXECUTION_FAILURE);
    }
  fclose (stream);

  /* Now edit the file of commands. */
  if (ename)
    {
      command = (char *)xmalloc (strlen (ename) + strlen (fn) + 2);
      sprintf (command, "%s %s", ename, fn);
    }
  else
    {
      fcedit = posixly_correct ? POSIX_FC_EDIT_COMMAND : FC_EDIT_COMMAND;
      command = (char *)xmalloc (3 + strlen (fcedit) + strlen (fn));
      sprintf (command, "%s %s", fcedit, fn);
    }
  retval = parse_and_execute (command, "fc", SEVAL_NOHIST);
  if (retval != EXECUTION_SUCCESS)
    {
      unlink (fn);
      free (fn);
      return (EXECUTION_FAILURE);
    }

  /* Make sure parse_and_execute doesn't turn this off, even though a
     call to parse_and_execute farther up the function call stack (e.g.,
     if this is called by vi_edit_and_execute_command) may have already
     called bash_history_disable. */
  remember_on_history = 1;

  /* Turn on the `v' flag while fc_execute_file runs so the commands
     will be echoed as they are read by the parser. */
  begin_unwind_frame ("fc builtin");
  add_unwind_protect ((Function *)xfree, fn);
  add_unwind_protect (unlink, fn);
  unwind_protect_int (echo_input_at_read);
  echo_input_at_read = 1;
    
  retval = fc_execute_file (fn);

  run_unwind_frame ("fc builtin");

  return (retval);
}

/* Return 1 if LIST->word->word is a legal number for fc's use. */
static int
fc_number (list)
     WORD_LIST *list;
{
  char *s;

  if (list == 0)
    return 0;
  s = list->word->word;
  if (*s == '-')
    s++;
  return (legal_number (s, (intmax_t *)NULL));
}

/* Return an absolute index into HLIST which corresponds to COMMAND.  If
   COMMAND is a number, then it was specified in relative terms.  If it
   is a string, then it is the start of a command line present in HLIST. */
static int
fc_gethnum (command, hlist)
     char *command;
     HIST_ENTRY **hlist;
{
  int sign, n, clen, rh;
  register int i, j;
  register char *s;

  sign = 1;
  /* Count history elements. */
  for (i = 0; hlist[i]; i++);

  /* With the Bash implementation of history, the current command line
     ("fc blah..." and so on) is already part of the history list by
     the time we get to this point.  This just skips over that command
     and makes the last command that this deals with be the last command
     the user entered before the fc.  We need to check whether the
     line was actually added (HISTIGNORE may have caused it to not be),
     so we check hist_last_line_added.  This needs to agree with the
     calculation of last_hist in fc_builtin above. */
  /* Even though command substitution through parse_and_execute turns off
     remember_on_history, command substitution in a shell when set -o history
     has been enabled (interactive or not) should use it in the last_hist
     calculation as if it were on. */
  rh = remember_on_history || ((subshell_environment & SUBSHELL_COMSUB) && enable_history_list);
  i -= rh + hist_last_line_added;

  /* No specification defaults to most recent command. */
  if (command == NULL)
    return (i);

  /* Otherwise, there is a specification.  It can be a number relative to
     the current position, or an absolute history number. */
  s = command;

  /* Handle possible leading minus sign. */
  if (s && (*s == '-'))
    {
      sign = -1;
      s++;
    }

  if (s && DIGIT(*s))
    {
      n = atoi (s);
      n *= sign;

      /* If the value is negative or zero, then it is an offset from
	 the current history item. */
      if (n < 0)
	{
	  n += i + 1;
	  return (n < 0 ? 0 : n);
	}
      else if (n == 0)
	return (i);
      else
	{
	  n -= history_base;
	  return (i < n ? i : n);
	}
    }

  clen = strlen (command);
  for (j = i; j >= 0; j--)
    {
      if (STREQN (command, histline (j), clen))
	return (j);
    }
  return (-1);
}

/* Locate the most recent history line which begins with
   COMMAND in HLIST, and return a malloc()'ed copy of it. */
static char *
fc_gethist (command, hlist)
     char *command;
     HIST_ENTRY **hlist;
{
  int i;

  if (hlist == 0)
    return ((char *)NULL);

  i = fc_gethnum (command, hlist);

  if (i >= 0)
    return (savestring (histline (i)));
  else
    return ((char *)NULL);
}

#ifdef INCLUDE_UNUSED
/* Read the edited history lines from STREAM and return them
   one at a time.  This can read unlimited length lines.  The
   caller should free the storage. */
static char *
fc_readline (stream)
     FILE *stream;
{
  register int c;
  int line_len = 0, lindex = 0;
  char *line = (char *)NULL;

  while ((c = getc (stream)) != EOF)
    {
      if ((lindex + 2) >= line_len)
	line = (char *)xrealloc (line, (line_len += 128));

      if (c == '\n')
	{
	  line[lindex++] = '\n';
	  line[lindex++] = '\0';
	  return (line);
	}
      else
	line[lindex++] = c;
    }

  if (!lindex)
    {
      if (line)
	free (line);

      return ((char *)NULL);
    }

  if (lindex + 2 >= line_len)
    line = (char *)xrealloc (line, lindex + 3);

  line[lindex++] = '\n';	    /* Finish with newline if none in file */
  line[lindex++] = '\0';
  return (line);
}
#endif

/* Perform the SUBS on COMMAND.
   SUBS is a list of substitutions, and COMMAND is a simple string.
   Return a pointer to a malloc'ed string which contains the substituted
   command. */
static char *
fc_dosubs (command, subs)
     char *command;
     REPL *subs;
{
  register char *new, *t;
  register REPL *r;

  for (new = savestring (command), r = subs; r; r = r->next)
    {
      t = strsub (new, r->pat, r->rep, 1);
      free (new);
      new = t;
    }
  return (new);
}

/* Use `command' to replace the last entry in the history list, which,
   by this time, is `fc blah...'.  The intent is that the new command
   become the history entry, and that `fc' should never appear in the
   history list.  This way you can do `r' to your heart's content. */
static void
fc_replhist (command)
     char *command;
{
  int n;

  if (command == 0 || *command == '\0')
    return;

  n = strlen (command);
  if (command[n - 1] == '\n')
    command[n - 1] = '\0';

  if (command && *command)
    {
      bash_delete_last_history ();
      maybe_add_history (command);	/* Obeys HISTCONTROL setting. */
    }
}

#ifdef INCLUDE_UNUSED
/* Add LINE to the history, after removing a single trailing newline. */
static void
fc_addhist (line)
     char *line;
{
  register int n;

  if (line == 0 || *line == 0)
    return;

  n = strlen (line);

  if (line[n - 1] == '\n')
    line[n - 1] = '\0';

  if (line && *line)
    maybe_add_history (line);		/* Obeys HISTCONTROL setting. */
}
#endif

#endif /* HISTORY */