lisp/mail/blessmail.el

   1 ;;; blessmail.el --- Decide whether movemail needs special privileges.
   2
   3 ;;; Copyright (C) 1994 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: internal
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Commentary:
  25
  26 ;; This is loaded into a bare Emacs to create the blessmail script,
  27 ;; which (on systems that need it) is used during installation
  28 ;; to give appropriate permissions to movemail.
  29 ;;
  30 ;; It has to be done from lisp in order to be sure of getting the
  31 ;; correct value of rmail-spool-directory.
  32
  33 ;;; Code:
  34
  35 (message "Using load-path %s" load-path)
  36 (load "paths.el")
  37 (load "site-init" t)
  38
  39 (let ((dirname rmail-spool-directory) linkname attr modes)
  40   ;; Check for symbolic link
  41   (while (setq linkname (file-symlink-p dirname))
  42     (setq dirname (if (file-name-absolute-p linkname)
  43                       linkname
  44                     (concat (file-name-directory dirname) linkname))))
  45   (setq attr (file-attributes dirname))
  46   (or (eq t (car attr))
  47       (signal 'error
  48               (list (format "%s is not a directory" rmail-spool-directory))))
  49   (setq modes (nth 8 attr))
  50   (insert "#!/bin/sh\n")
  51   (cond
  52    ((= ?w (aref modes 8))
  53     (insert "exit 0"))
  54    ((= ?w (aref modes 5))
  55     (insert "chgrp " (number-to-string (nth 3 attr))
  56             " $* && chmod g+s $*\n"))
  57    ((= ?w (aref modes 2))
  58     (insert "chown " (number-to-string (nth 2 attr))
  59             " $* && chmod u+s $*\n"))
  60    (t
  61     (insert "chown root $* && chmod u+s $*\n"))))
  62 (write-region (point-min) (point-max) "blessmail")
  63 (kill-emacs)
  64
  65 ;;; blessmail.el ends here