jabber-ft-common.el

   1 ;;; jabber-ft-common.el --- Common functions for sending and receiving files (JEP-0096)
   2
   3 ;; Copyright (C) 2006  Magnus Henoch
   4
   5 ;; Author: Magnus Henoch <mange@freemail.hu>
   6
   7 ;; This file is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 2, or (at your option)
  10 ;; any later version.
  11
  12 ;; This file is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  19 ;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 ;; Boston, MA 02110-1301, USA.
  21
  22 (defcustom jabber-ft-md5sum-program (or (when (executable-find "md5")
  23                                           (list (executable-find "md5") "-n"))
  24                                         (when (executable-find "md5sum")
  25                                           (list (executable-find "md5sum"))))
  26   "The program to use to calculate MD5 sums of files.
  27 It should accept the file name as the only argument."
  28   :type 'string
  29   :group 'jabber)
  30
  31 (defun jabber-ft-get-md5 (file-name)
  32   "Get MD5 sum of FILE-NAME, and return as hex string.
  33 Return nil if no MD5 summing program is available."
  34   (when jabber-ft-md5sum-program
  35     (with-temp-buffer
  36       (apply 'call-process (car jabber-ft-md5sum-program) nil t nil
  37              (append (cdr jabber-ft-md5sum-program) (list file-name)))
  38       ;; Output is "hexsum filename"
  39       (goto-char (point-min))
  40       (forward-word 1)
  41       (buffer-substring (point-min) (point)))))
  42
  43 (provide 'jabber-ft-common)
  44 ;; arch-tag: 1ce4cce0-8360-11da-a5ba-000a95c2fcd0