lisp/paths.el

   1 ;;; paths.el --- define pathnames for use by various Emacs commands -*- no-byte-compile: t -*-
   2
   3 ;; Copyright (C) 1986, 1988, 1994, 1999, 2000 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 the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; These are default settings for names of certain files and directories
  28 ;; that Emacs needs to refer to from time to time.
  29
  30 ;; If these settings are not right, override them with `setq'
  31 ;; in site-init.el.  Do not change this file.
  32
  33 ;;; Code:
  34
  35 ;; Docstrings in this file should, where reasonable, follow the
  36 ;; conventions described in bindings.el, so that they get put in the
  37 ;; DOC file rather than in memory.
  38
  39 (defun prune-directory-list (dirs &optional keep reject)
  40   "Returns a copy of DIRS with all non-existant directories removed.
  41 The optional argument KEEP is a list of directories to retain even if
  42 they don't exist, and REJECT is a list of directories to remove from
  43 DIRS, even if they exist; REJECT takes precedence over KEEP.
  44
  45 Note that membership in REJECT and KEEP is checked using simple string
  46 comparision."
  47   (apply #'nconc
  48          (mapcar (lambda (dir)
  49                    (and (not (member dir reject))
  50                         (or (member dir keep) (file-directory-p dir))
  51                         (list dir)))
  52                     dirs)))
  53
  54 (defvar Info-default-directory-list
  55   (let* ((config-dir
  56           (file-name-as-directory configure-info-directory))
  57          (config
  58           (list config-dir))
  59          (unpruned-prefixes
  60           ;; Directory trees that may not exist at installation time, and
  61           ;; so shouldn't be pruned based on existance.
  62           '("/usr/local/"))
  63          (prefixes
  64           ;; Directory trees in which to look for info subdirectories
  65           (prune-directory-list '("/usr/local/" "/usr/" "/opt/" "/")
  66                                 unpruned-prefixes))
  67          (suffixes
  68           ;; Subdirectories in each directory tree that may contain info
  69           ;; directories.
  70           '("" "share/" "gnu/" "gnu/lib/" "gnu/lib/emacs/"
  71             "emacs/" "lib/" "lib/emacs/"))
  72          (standard-info-dirs
  73           (apply #'nconc
  74                  (mapcar (lambda (pfx)
  75                            (let ((dirs
  76                                   (mapcar (lambda (sfx)
  77                                             (concat pfx sfx "info/"))
  78                                           suffixes)))
  79                              (if (member pfx unpruned-prefixes)
  80                                  dirs
  81                                (prune-directory-list dirs config))))
  82                          prefixes))))
  83     ;; If $(prefix)/info is not one of the standard info directories,
  84     ;; they are probably installing an experimental version of Emacs,
  85     ;; so make sure that experimental version's Info files override
  86     ;; the ones in standard directories.
  87     (if (member config-dir standard-info-dirs)
  88         (nconc standard-info-dirs config)
  89       (cons config-dir standard-info-dirs)))
  90   "Default list of directories to search for Info documentation files.
  91 They are searched in the order they are given in the list.
  92 Therefore, the directory of Info files that come with Emacs
  93 normally should come last (so that local files override standard ones),
  94 unless Emacs is installed into a non-standard directory.  In the latter
  95 case, the directory of Info files that come with Emacs should be
  96 first in this list.
  97
  98 Once Info is started, the list of directories to search
  99 comes from the variable `Info-directory-list'.
 100 This variable `Info-default-directory-list' is used as the default
 101 for initializing `Info-directory-list' when Info is started, unless
 102 the environment variable INFOPATH is set.")
 103
 104 (defvar news-path
 105   (if (file-exists-p "/usr/spool/news/")
 106       "/usr/spool/news/"
 107     "/var/spool/news/")
 108   "The root directory below which all news files are stored.")
 109
 110 (defvar news-inews-program
 111   (cond ((file-exists-p "/usr/bin/inews") "/usr/bin/inews")
 112         ((file-exists-p "/usr/local/inews") "/usr/local/inews")
 113         ((file-exists-p "/usr/local/bin/inews") "/usr/local/bin/inews")
 114         ((file-exists-p "/usr/contrib/lib/news/inews") "/usr/contrib/lib/news/inews")
 115         ((file-exists-p "/usr/lib/news/inews") "/usr/lib/news/inews")
 116         (t "inews"))
 117   "Program to post news.")
 118
 119 ;; set this to your local server
 120 (defvar gnus-default-nntp-server "" "\
 121 The name of the host running an NNTP server.
 122 The null string means use the local host as the server site.")
 123
 124 (defvar gnus-nntp-service "nntp"
 125   "NNTP service name, usually \"nntp\" or 119).
 126 Go to a local news spool if its value is nil, in which case `gnus-nntp-server'
 127 should be set to `(system-name)'.")
 128
 129 (defvar gnus-local-organization nil "\
 130 *The name of your organization, as a string.
 131 The `ORGANIZATION' environment variable is used instead if defined.")
 132
 133 (defcustom rmail-file-name "~/RMAIL"
 134   "*Name of user's primary mail file."
 135   :type 'string
 136   :group 'rmail
 137   :version "21.1")
 138
 139 (defconst rmail-spool-directory
 140   (cond ((string-match "^[^-]+-[^-]+-sco3.2v4" system-configuration)
 141          "/usr/spool/mail/")
 142         ;; On The Bull DPX/2 /usr/spool/mail is used although
 143         ;; it is usg-unix-v.
 144         ((string-match "^m68k-bull-sysv3" system-configuration)
 145          "/usr/spool/mail/")
 146         ;; SVR4 and recent BSD are said to use this.
 147         ;; Rather than trying to know precisely which systems use it,
 148         ;; let's assume this dir is never used for anything else.
 149         ((file-exists-p "/var/mail")
 150          "/var/mail/")
 151         ;; Many GNU/Linux systems use this name.
 152         ((file-exists-p "/var/spool/mail")
 153          "/var/spool/mail/")
 154         ((memq system-type '(dgux hpux usg-unix-v unisoft-unix rtu irix))
 155          "/usr/mail/")
 156         (t "/usr/spool/mail/"))
 157   "Name of directory used by system mailer for delivering new mail.
 158 Its name should end with a slash.")
 159
 160 (defconst sendmail-program
 161   (cond
 162     ((file-exists-p "/usr/sbin/sendmail") "/usr/sbin/sendmail")
 163     ((file-exists-p "/usr/lib/sendmail") "/usr/lib/sendmail")
 164     ((file-exists-p "/usr/ucblib/sendmail") "/usr/ucblib/sendmail")
 165     (t "fakemail"))                     ;In ../etc, to interface to /bin/mail.
 166   "Program used to send messages.")
 167
 168 (defconst remote-shell-program
 169   (cond
 170    ;; Some systems use rsh for the remote shell; others use that name for the
 171    ;; restricted shell and use remsh for the remote shell.  Let's try to guess
 172    ;; based on what we actually find out there.  The restricted shell is
 173    ;; almost certainly in /bin or /usr/bin, so it's probably safe to assume
 174    ;; that an rsh found elsewhere is the remote shell program.  The converse
 175    ;; is not true: /usr/bin/rsh could be either one, so check that last.
 176    ((file-exists-p "/usr/ucb/remsh") "/usr/ucb/remsh")
 177    ((file-exists-p "/usr/bsd/remsh") "/usr/bsd/remsh")
 178    ((file-exists-p "/bin/remsh") "/bin/remsh")
 179    ((file-exists-p "/usr/bin/remsh") "/usr/bin/remsh")
 180    ((file-exists-p "/usr/local/bin/remsh") "/usr/local/bin/remsh")
 181    ((file-exists-p "/usr/ucb/rsh") "/usr/ucb/rsh")
 182    ((file-exists-p "/usr/bsd/rsh") "/usr/bsd/rsh")
 183    ((file-exists-p "/usr/local/bin/rsh") "/usr/local/bin/rsh")
 184    ((file-exists-p "/usr/bin/rcmd") "/usr/bin/rcmd")
 185    ((file-exists-p "/bin/rcmd") "/bin/rcmd")
 186    ((file-exists-p "/bin/rsh") "/bin/rsh")
 187    ((file-exists-p "/usr/bin/rsh") "/usr/bin/rsh")
 188    (t "rsh"))
 189   "File name for remote-shell program (often rsh or remsh).")
 190
 191 (defconst term-file-prefix (if (eq system-type 'vax-vms) "[.term]" "term/") "\
 192 If non-nil, Emacs startup does (load (concat term-file-prefix (getenv \"TERM\")))
 193 You may set this variable to nil in your `.emacs' file if you do not wish
 194 the terminal-initialization file to be loaded.")
 195
 196 (defconst abbrev-file-name
 197   (if (eq system-type 'vax-vms)
 198       "~/abbrev.def"
 199     (convert-standard-filename "~/.abbrev_defs"))
 200   "*Default name of file to read abbrevs from.")
 201
 202 ;;; paths.el ends here