lisp/mail/blessmail.el

   1 ;;; blessmail.el --- decide whether movemail needs special privileges -*- no-byte-compile: t -*-
   2
   3 ;; Copyright (C) 1994, 2001-2013 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: internal
   7 ;; Package: emacs
   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 3 of the License, or
  14 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  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 ;; These are no longer needed because we run this in emacs instead of temacs.
  36 ;; (message "Using load-path %s" load-path)
  37 ;; (load "paths.el")
  38 ;; It is not safe to load site-init.el here, because it might have things in it
  39 ;; that won't load properly unless all the rest of Emacs is loaded.
  40
  41 (let ((dirname (directory-file-name rmail-spool-directory))
  42       linkname attr modes)
  43   ;; Check for symbolic link
  44   (while (setq linkname (file-symlink-p dirname))
  45     (setq dirname (if (file-name-absolute-p linkname)
  46                       linkname
  47                     (concat (file-name-directory dirname) linkname))))
  48   (insert "#!/bin/sh\n")
  49   (setq attr (file-attributes dirname))
  50   (if (not (eq t (car attr)))
  51       (insert (format "echo %s is not a directory\n" rmail-spool-directory))
  52     (setq modes (nth 8 attr))
  53     (cond ((= ?w (aref modes 8))
  54            ;; Nothing needs to be done.
  55            )
  56           ((= ?w (aref modes 5))
  57            (insert "chgrp " (number-to-string (nth 3 attr))
  58                    " $* && chmod g+s $*\n"))
  59           ((= ?w (aref modes 2))
  60            (insert "chown " (number-to-string (nth 2 attr))
  61                    " $* && chmod u+s $*\n"))
  62           (t
  63            (insert "chown root $* && chmod u+s $*\n"))))
  64   (insert "echo mail directory = " dirname "\n"))
  65 (write-region (point-min) (point-max) "blessmail")
  66 (kill-emacs)
  67
  68 ;;; blessmail.el ends here