lisp/netunam.el

   1 ;;; netunam.el --- HP-UX RFA Commands
   2
   3 ;; Author: Chris Hanson <cph@zurich.ai.mit.edu>
   4 ;; Last-Modified: 31 Oct 1989
   5
   6 ;;; $Header: netunam.el,v 1.3 88/12/21 16:32:23 GMT cph Exp $
   7
   8 ;; Copyright (C) 1988 Free Software Foundation, Inc.
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  25
  26 ;;; Code:
  27
  28 (defconst rfa-node-directory "/net/"
  29   "Directory in which RFA network special files are stored.
  30 By HP convention, this is \"/net/\".")
  31
  32 (defvar rfa-default-node nil
  33   "If not nil, this is the name of the default RFA network special file.")
  34
  35 (defvar rfa-password-memoize-p t
  36   "If non-nil, remember login user's passwords after they have been entered.")
  37
  38 (defvar rfa-password-alist '()
  39   "An association from node-name strings to password strings.
  40 Used if `rfa-password-memoize-p' is non-nil.")
  41
  42 (defvar rfa-password-per-node-p t
  43   "If nil, login user uses same password on all machines.
  44 Has no effect if `rfa-password-memoize-p' is nil.")
  45
  46 (defun rfa-set-password (password &optional node user)
  47   "Add PASSWORD to the RFA password database.
  48 Optional second arg NODE is a string specifying a particular nodename;
  49  if supplied and not nil, PASSWORD applies to only that node.
  50 Optional third arg USER is a string specifying the (remote) user whose
  51  password this is; if not supplied this defaults to (user-login-name)."
  52   (if (not user) (setq user (user-login-name)))
  53   (let ((node-entry (assoc node rfa-password-alist)))
  54     (if node-entry
  55         (let ((user-entry (assoc user (cdr node-entry))))
  56           (if user-entry
  57               (rplacd user-entry password)
  58               (rplacd node-entry
  59                       (nconc (cdr node-entry)
  60                              (list (cons user password))))))
  61         (setq rfa-password-alist
  62               (nconc rfa-password-alist
  63                      (list (list node (cons user password))))))))
  64 \f
  65 (defun rfa-open (node &optional user password)
  66   "Open a network connection to a server using remote file access.
  67 First argument NODE is the network node for the remote machine.
  68 Second optional argument USER is the user name to use on that machine.
  69   If called interactively, the user name is prompted for.
  70 Third optional argument PASSWORD is the password string for that user.
  71   If not given, this is filled in from the value of
  72 `rfa-password-alist', or prompted for.  A prefix argument of - will
  73 cause the password to be prompted for even if previously memoized."
  74   (interactive
  75    (list (read-file-name "rfa-open: " rfa-node-directory rfa-default-node t)
  76          (read-string "user-name: " (user-login-name))))
  77   (let ((node
  78          (and (or rfa-password-per-node-p
  79                   (not (equal user (user-login-name))))
  80               node)))
  81     (if (not password)
  82         (setq password
  83               (let ((password
  84                      (cdr (assoc user (cdr (assoc node rfa-password-alist))))))
  85                 (or (and (not current-prefix-arg) password)
  86                     (rfa-password-read
  87                      (format "password for user %s%s: "
  88                              user
  89                              (if node (format " on node \"%s\"" node) ""))
  90                      password))))))
  91   (let ((result
  92          (sysnetunam (expand-file-name node rfa-node-directory)
  93                      (concat user ":" password))))
  94     (if (interactive-p)
  95         (if result
  96             (message "Opened network connection to %s as %s" node user)
  97             (error "Unable to open network connection")))
  98     (if (and rfa-password-memoize-p result)
  99         (rfa-set-password password node user))
 100     result))
 101
 102 (defun rfa-close (node)
 103   "Close a network connection to a server using remote file access.
 104 NODE is the network node for the remote machine."
 105   (interactive
 106    (list (read-file-name "rfa-close: " rfa-node-directory rfa-default-node t)))
 107   (let ((result (sysnetunam (expand-file-name node rfa-node-directory) "")))
 108     (cond ((not (interactive-p)) result)
 109           ((not result) (error "Unable to close network connection"))
 110           (t (message "Closed network connection to %s" node)))))
 111 \f
 112 (defun rfa-password-read (prompt default)
 113   (let ((rfa-password-accumulator (or default "")))
 114     (read-from-minibuffer prompt
 115                           (and default
 116                                (let ((copy (concat default))
 117                                      (index 0)
 118                                      (length (length default)))
 119                                  (while (< index length)
 120                                    (aset copy index ?.)
 121                                    (setq index (1+ index)))
 122                                  copy))
 123                           rfa-password-map)
 124     rfa-password-accumulator))
 125
 126 (defvar rfa-password-map nil)
 127 (if (not rfa-password-map)
 128     (let ((char ? ))
 129       (setq rfa-password-map (make-keymap))
 130       (while (< char 127)
 131         (define-key rfa-password-map (char-to-string char)
 132           'rfa-password-self-insert)
 133         (setq char (1+ char)))
 134       (define-key rfa-password-map "\C-g"
 135         'abort-recursive-edit)
 136       (define-key rfa-password-map "\177"
 137         'rfa-password-rubout)
 138       (define-key rfa-password-map "\n"
 139         'exit-minibuffer)
 140       (define-key rfa-password-map "\r"
 141         'exit-minibuffer)))
 142
 143 (defvar rfa-password-accumulator nil)
 144
 145 (defun rfa-password-self-insert ()
 146   (interactive)
 147   (setq rfa-password-accumulator
 148         (concat rfa-password-accumulator
 149                 (char-to-string last-command-char)))
 150   (insert ?.))
 151
 152 (defun rfa-password-rubout ()
 153   (interactive)
 154   (delete-char -1)
 155   (setq rfa-password-accumulator
 156         (substring rfa-password-accumulator 0 -1)))
 157
 158 ;;; netunam.el ends here