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