Languguage OS 2/Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO/gnu/bash_114.zip/bash-1.14.2/builtins/bind.def

Text File | 1994-07-05 | 5.4 KB | 220 lines

This file is bind.def, from which is created bind.c.
It implements the builtin "bind" in Bash.

Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.

This file is part of GNU Bash, the Bourne Again SHell.

Bash 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 1, or (at your option) any later
version.

Bash 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 Bash; see the file COPYING.  If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

$PRODUCES bind.c

$BUILTIN bind
$DEPENDS_ON READLINE
$FUNCTION bind_builtin
$SHORT_DOC bind [-lvd] [-m keymap] [-f filename] [-q name] [keyseq:readline-function]
Bind a key sequence to a Readline function, or to a macro.  The
syntax is equivalent to that found in ~/.inputrc, but must be
passed as a single argument: bind '"\C-x\C-r": re-read-init-file'.
Arguments we accept:
  -m  keymap         Use `keymap' as the keymap for the duration of this
                     command.  Acceptable keymap names are emacs,
                     emacs-standard, emacs-meta, emacs-ctlx, vi, vi-move,
                     vi-command, and vi-insert.
  -l                 List names of functions.
  -v                 List function names and bindings.
  -d                 Dump functions and bindings such that they
                     can be read back in.
  -f  filename       Read key bindings from FILENAME.
  -q  function-name  Query about which keys invoke the named function.
$END

#include <stdio.h>
#include "../shell.h"
#if defined (READLINE)
#include <errno.h>
#if !defined (errno)
extern int errno;
#endif /* !errno */
#include <readline/readline.h>
#include <readline/history.h>
#include "bashgetopt.h"

static int query_bindings ();

extern int bash_readline_initialized;
extern int no_line_editing;

#define BIND_RETURN(x)  do { return_code = x; goto bind_exit; } while (0)

#define USAGE "usage: bind [-lvd] [-m keymap] [-f filename] [-q name] [keyseq:readline_func]"

int
bind_builtin (list)
     WORD_LIST *list;
{
  int return_code = EXECUTION_SUCCESS;
  FILE *old_rl_outstream;
  Keymap kmap, saved_keymap;
  int lflag, dflag, fflag, vflag, qflag, mflag, opt;
  char *initfile, *map_name, *fun_name;

  if (no_line_editing)
    return (EXECUTION_FAILURE);

  kmap = saved_keymap = (Keymap) NULL;
  lflag = dflag = vflag = fflag = qflag = mflag = 0;
  initfile = map_name = fun_name = (char *)NULL;

  if (!bash_readline_initialized)
    initialize_readline ();

  /* Cannot use unwind_protect_pointer () on "FILE *", it is only
     guaranteed to work for strings. */
  /* XXX -- see if we can use unwind_protect here */
  old_rl_outstream = rl_outstream;
  rl_outstream = stdout;

  reset_internal_getopt ();
  while ((opt = internal_getopt (list, "lvdf:q:m:")) != EOF)
    {
      switch (opt)
    {
    case 'l':
      lflag++;
      break;

    case 'v':
      vflag++;
      break;

    case 'd':
      dflag++;
      break;

    case 'f':
      fflag++;
      initfile = list_optarg;
      break;

    case 'm':
      mflag++;
      map_name = list_optarg;
      break;

    case 'q':
      qflag++;
      fun_name = list_optarg;
      break;

    default:
      builtin_error (USAGE);
      BIND_RETURN (EX_USAGE);
    }
    }

  list = loptend;

  /* First, see if we need to install a special keymap for this
     command.  Then start on the arguments. */

  if (mflag && map_name)
    {
      kmap = rl_get_keymap_by_name (map_name);
      if (!kmap)
        {
          builtin_error ("`%s': illegal keymap name", map_name);
      BIND_RETURN (EXECUTION_FAILURE);
        }
    }

  if (kmap)
    {
      saved_keymap = rl_get_keymap ();
      rl_set_keymap (kmap);
    }

  /* XXX - we need to add exclusive use tests here.  It doesn't make sense
     to use some of these options together. */
  /* Now hack the option arguments */
  if (lflag)
    rl_list_funmap_names (0);

  if (vflag)
    rl_function_dumper (0);

  if (dflag)
    rl_function_dumper (1);

  if (fflag && initfile)
    {
      if (rl_read_init_file (initfile) != 0)
    {
      builtin_error ("cannot read %s: %s\n", initfile, strerror (errno));
      BIND_RETURN (EXECUTION_FAILURE);
    }
    }

  if (qflag && fun_name)
    return_code = query_bindings (fun_name);

  /* Process the rest of the arguments as binding specifications. */
  while (list)
    {
      rl_parse_and_bind (list->word->word);
      list = list->next;
    }

  if (saved_keymap)
    rl_set_keymap (saved_keymap);

 bind_exit:
  rl_outstream = old_rl_outstream;
  return (return_code);
}

static int
query_bindings (name)
     char *name;
{
  Function *function;
  char **keyseqs;
  int j;

  function = rl_named_function (name);
  if (!function)
    {
      builtin_error ("unknown function name `%s'", name);
      return EXECUTION_FAILURE;
    }

  keyseqs = rl_invoking_keyseqs (function);

  if (!keyseqs)
    {
      printf ("%s is not bound to any keys.\n", name);
      return EXECUTION_FAILURE;
    }

  printf ("%s can be invoked via ", name);
  for (j = 0; j < 5 && keyseqs[j]; j++)
    printf ("\"%s\"%s", keyseqs[j], keyseqs[j + 1] ? ", " : ".\n");
  if (keyseqs[j])
    printf ("...\n");
  free_array (keyseqs);
  return EXECUTION_SUCCESS;
}
#endif /* READLINE */