lisp/netunam.el

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