(defun prune-directory-list (dirs &optional keep reject)
"Returns a copy of DIRS with all non-existent directories removed.
The optional argument KEEP is a list of directories to retain even if
they don't exist, and REJECT is a list of directories to remove from
DIRS, even if they exist; REJECT takes precedence over KEEP.
Note that membership in REJECT and KEEP is checked using simple string
comparison."
(apply #'nconc
(mapcar (lambda (dir)
(and (not (member dir reject))
(or (member dir keep) (file-directory-p dir))
(list dir)))
dirs)))
(defvar Info-default-directory-list
(let* ((config-dir
(file-name-as-directory configure-info-directory))
(config
(list config-dir))
(unpruned-prefixes
'("/usr/local/"))
(prefixes
(prune-directory-list '("/usr/local/" "/usr/" "/opt/" "/")
unpruned-prefixes))
(suffixes
'("share/" "" "gnu/" "gnu/lib/" "gnu/lib/emacs/"
"emacs/" "lib/" "lib/emacs/"))
(standard-info-dirs
(apply #'nconc
(mapcar (lambda (pfx)
(let ((dirs
(mapcar (lambda (sfx)
(concat pfx sfx "info/"))
suffixes)))
(if (member pfx unpruned-prefixes)
dirs
(prune-directory-list dirs config))))
prefixes))))
(if (member config-dir standard-info-dirs)
(nconc standard-info-dirs config)
(cons config-dir standard-info-dirs)))
"Default list of directories to search for Info documentation files.
They are searched in the order they are given in the list.
Therefore, the directory of Info files that come with Emacs
normally should come last (so that local files override standard ones),
unless Emacs is installed into a non-standard directory. In the latter
case, the directory of Info files that come with Emacs should be
first in this list.
Once Info is started, the list of directories to search
comes from the variable `Info-directory-list'.
This variable `Info-default-directory-list' is used as the default
for initializing `Info-directory-list' when Info is started, unless
the environment variable INFOPATH is set.")
(defvar news-directory
(if (file-exists-p "/usr/spool/news/")
"/usr/spool/news/"
"/var/spool/news/")
"The root directory below which all news files are stored.")
(defvaralias 'news-path 'news-directory)
(defvar news-inews-program
(cond ((file-exists-p "/usr/bin/inews") "/usr/bin/inews")
((file-exists-p "/usr/local/inews") "/usr/local/inews")
((file-exists-p "/usr/local/bin/inews") "/usr/local/bin/inews")
((file-exists-p "/usr/contrib/lib/news/inews") "/usr/contrib/lib/news/inews")
((file-exists-p "/usr/lib/news/inews") "/usr/lib/news/inews")
(t "inews"))
"Program to post news.")
(defvar gnus-default-nntp-server "" "\
The name of the host running an NNTP server.
The null string means use the local host as the server site.")
(defvar gnus-nntp-service "nntp"
"NNTP service name, usually \"nntp\" or 119).
Go to a local news spool if its value is nil, in which case `gnus-nntp-server'
should be set to `(system-name)'.")
(defvar gnus-local-organization nil "\
*The name of your organization, as a string.
The `ORGANIZATION' environment variable is used instead if defined.")
(defcustom rmail-file-name "~/RMAIL"
"*Name of user's primary mail file."
:type 'string
:group 'rmail
:version "21.1")
(defvar rmail-spool-directory
(cond ((string-match "^[^-]+-[^-]+-sco3.2v4" system-configuration)
"/usr/spool/mail/")
((string-match "^m68k-bull-sysv3" system-configuration)
"/usr/spool/mail/")
((file-exists-p "/var/mail")
"/var/mail/")
((file-exists-p "/var/spool/mail")
"/var/spool/mail/")
((memq system-type '(dgux hpux usg-unix-v unisoft-unix rtu irix))
"/usr/mail/")
(t "/usr/spool/mail/"))
"Name of directory used by system mailer for delivering new mail.
Its name should end with a slash.")
(defcustom remote-shell-program
(cond
((file-exists-p "/usr/ucb/remsh") "/usr/ucb/remsh")
((file-exists-p "/usr/bsd/remsh") "/usr/bsd/remsh")
((file-exists-p "/bin/remsh") "/bin/remsh")
((file-exists-p "/usr/bin/remsh") "/usr/bin/remsh")
((file-exists-p "/usr/local/bin/remsh") "/usr/local/bin/remsh")
((file-exists-p "/usr/ucb/rsh") "/usr/ucb/rsh")
((file-exists-p "/usr/bsd/rsh") "/usr/bsd/rsh")
((file-exists-p "/usr/local/bin/rsh") "/usr/local/bin/rsh")
((file-exists-p "/usr/bin/rcmd") "/usr/bin/rcmd")
((file-exists-p "/bin/rcmd") "/bin/rcmd")
((file-exists-p "/bin/rsh") "/bin/rsh")
((file-exists-p "/usr/bin/rsh") "/usr/bin/rsh")
(t "rsh"))
"File name for remote-shell program (often rsh or remsh)."
:group 'environment
:type 'file)
(defvar term-file-prefix (if (eq system-type 'vax-vms) "[.term]" "term/") "\
If non-nil, Emacs startup does (load (concat term-file-prefix (getenv \"TERM\")))
You may set this variable to nil in your `.emacs' file if you do not wish
the terminal-initialization file to be loaded.")
(defvar abbrev-file-name
(if (eq system-type 'vax-vms)
"~/abbrev.def"
(convert-standard-filename "~/.abbrev_defs"))
"*Default name of file to read abbrevs from.")