code.delx.au - gnu-emacs/blob - lisp/mail/blessmail.el

   1 ;;; blessmail.el --- decide whether movemail needs special privileges -*- no-byte-compile: t -*-
   2
   3 ;; Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: internal
   8 ;; Package: emacs
   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 3 of the License, or
  15 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Commentary:
  26
  27 ;; This is loaded into a bare Emacs to create the blessmail script,
  28 ;; which (on systems that need it) is used during installation
  29 ;; to give appropriate permissions to movemail.
  30 ;;
  31 ;; It has to be done from lisp in order to be sure of getting the
  32 ;; correct value of rmail-spool-directory.
  33
  34 ;;; Code:
  35
  36 ;; These are no longer needed because we run this in emacs instead of temacs.
  37 ;; (message "Using load-path %s" load-path)
  38 ;; (load "paths.el")
  39 ;; It is not safe to load site-init.el here, because it might have things in it
  40 ;; that won't load properly unless all the rest of Emacs is loaded.
  41
  42 (let ((dirname (directory-file-name rmail-spool-directory))
  43       linkname attr modes)
  44   ;; Check for symbolic link
  45   (while (setq linkname (file-symlink-p dirname))
  46     (setq dirname (if (file-name-absolute-p linkname)
  47                       linkname
  48                     (concat (file-name-directory dirname) linkname))))
  49   (insert "#!/bin/sh\n")
  50   (setq attr (file-attributes dirname))
  51   (if (not (eq t (car attr)))
  52       (insert (format "echo %s is not a directory\n" rmail-spool-directory))
  53     (setq modes (nth 8 attr))
  54     (cond ((= ?w (aref modes 8))
  55            ;; Nothing needs to be done.
  56            )
  57           ((= ?w (aref modes 5))
  58            (insert "chgrp " (number-to-string (nth 3 attr))
  59                    " $* && chmod g+s $*\n"))
  60           ((= ?w (aref modes 2))
  61            (insert "chown " (number-to-string (nth 2 attr))
  62                    " $* && chmod u+s $*\n"))
  63           (t
  64            (insert "chown root $* && chmod u+s $*\n"))))
  65   (insert "echo mail directory = " dirname "\n"))
  66 (write-region (point-min) (point-max) "blessmail")
  67 (kill-emacs)
  68
  69 ;;; blessmail.el ends here