lisp/pcmpl-unix.el

   1 ;;; pcmpl-unix.el --- standard UNIX completions
   2
   3 ;; Copyright (C) 1999, 2000 Free Software Foundation
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs 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 ;; GNU Emacs 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 the
  19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 ;; Boston, MA 02111-1307, USA.
  21
  22 ;;; Commentary:
  23
  24 ;;; Code:
  25
  26 (provide 'pcmpl-unix)
  27
  28 (require 'pcomplete)
  29
  30 ;; User Variables:
  31
  32 (defcustom pcmpl-unix-group-file "/etc/group"
  33   "*If non-nil, a string naming the group file on your system."
  34   :type 'file
  35   :group 'pcmpl-unix)
  36
  37 (defcustom pcmpl-unix-passwd-file "/etc/passwd"
  38   "*If non-nil, a string naming the passwd file on your system."
  39   :type 'file
  40   :group 'pcmpl-unix)
  41
  42 ;; Functions:
  43
  44 ;;;###autoload
  45 (defun pcomplete/cd ()
  46   "Completion for `cd'."
  47   (pcomplete-here (pcomplete-dirs)))
  48
  49 ;;;###autoload
  50 (defalias 'pcomplete/pushd 'pcomplete/cd)
  51
  52 ;;;###autoload
  53 (defun pcomplete/rmdir ()
  54   "Completion for `rmdir'."
  55   (while (pcomplete-here (pcomplete-dirs))))
  56
  57 ;;;###autoload
  58 (defun pcomplete/rm ()
  59   "Completion for `rm'."
  60   (let ((pcomplete-help "(fileutils)rm invocation"))
  61     (pcomplete-opt "dfirRv")
  62     (while (pcomplete-here (pcomplete-all-entries) nil
  63                            'expand-file-name))))
  64
  65 ;;;###autoload
  66 (defun pcomplete/xargs ()
  67   "Completion for `xargs'."
  68   (pcomplete-here (funcall pcomplete-command-completion-function))
  69   (funcall (or (pcomplete-find-completion-function (pcomplete-arg 1))
  70                pcomplete-default-completion-function)))
  71
  72 ;;;###autoload
  73 (defalias 'pcomplete/time 'pcomplete/xargs)
  74
  75 ;;;###autoload
  76 (defun pcomplete/which ()
  77   "Completion for `which'."
  78   (while (pcomplete-here (funcall pcomplete-command-completion-function))))
  79
  80 (defun pcmpl-unix-read-passwd-file (file)
  81   "Return an alist correlating gids to group names in FILE."
  82   (let (names)
  83     (when (file-readable-p file)
  84       (with-temp-buffer
  85         (insert-file-contents file)
  86         (goto-char (point-min))
  87         (while (not (eobp))
  88           (let* ((fields
  89                   (split-string (buffer-substring
  90                                  (point) (progn (end-of-line)
  91                                                 (point))) ":")))
  92             (setq names (cons (nth 0 fields) names)))
  93           (forward-line))))
  94     (pcomplete-uniqify-list names)))
  95
  96 (defsubst pcmpl-unix-group-names ()
  97   "Read the contents of /etc/group for group names."
  98   (if pcmpl-unix-group-file
  99       (pcmpl-unix-read-passwd-file pcmpl-unix-group-file)))
 100
 101 (defsubst pcmpl-unix-user-names ()
 102   "Read the contents of /etc/passwd for user names."
 103   (if pcmpl-unix-passwd-file
 104       (pcmpl-unix-read-passwd-file pcmpl-unix-passwd-file)))
 105
 106 ;;;###autoload
 107 (defun pcomplete/chown ()
 108   "Completion for the `chown' command."
 109   (unless (pcomplete-match "\\`-")
 110     (if (pcomplete-match "\\`[^.]*\\'" 0)
 111         (pcomplete-here* (pcmpl-unix-user-names))
 112       (if (pcomplete-match "\\.\\([^.]*\\)\\'" 0)
 113           (pcomplete-here* (pcmpl-unix-group-names)
 114                            (pcomplete-match-string 1 0))
 115         (pcomplete-here*))))
 116   (while (pcomplete-here (pcomplete-entries))))
 117
 118 ;;;###autoload
 119 (defun pcomplete/chgrp ()
 120   "Completion for the `chgrp' command."
 121   (unless (pcomplete-match "\\`-")
 122     (pcomplete-here* (pcmpl-unix-group-names)))
 123   (while (pcomplete-here (pcomplete-entries))))
 124
 125 ;;; pcmpl-unix.el ends here