-;;;; dired-lisp.el - emulate Tree Dired's ls completely in Emacs Lisp
+;;; ls-lisp.el --- emulate insert-directory completely in Emacs Lisp
-;;;; READ THE WARNING BELOW BEFORE USING THIS PROGRAM!
-
-(defconst dired-lisp-version (substring "$Revision: 1.6 $" 11 -2)
- "$Id: dired-lisp.el,v 1.6 1992/04/30 10:29:53 sk Exp sk $")
+;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>
+;; Keywords: unix
;; Copyright (C) 1992 by Sebastian Kremer <sk@thp.uni-koeln.de>
;; along with this program; if not, write to the Free Software
;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-;; LISPDIR ENTRY for the Elisp Archive ===============================
-;; LCD Archive Entry:
-;; dired-lisp|Sebastian Kremer|sk@thp.uni-koeln.de
-;; |emulate Tree Dired's ls completely in Emacs Lisp
-;; |$Date: 1992/04/30 10:29:53 $|$Revision: 1.6 $|
-
;; INSTALLATION =======================================================
;;
-;; Put this file into your load-path. Loading it will result in
-;; redefining function dired-ls to not call ls.
-
-;; You need tree dired from ftp.cs.buffalo.edu:pub/Emacs/diredall.tar.Z,
-;; classic (e.g. 18.57) dired.el will not work.
+;; Put this file into your load-path. To use it, load it
+;; with (load "ls-lisp").
;; OVERVIEW ===========================================================
-;; This file overloads tree dired so that all fileinfo is retrieved
-;; directly from Emacs lisp, without using an ls subprocess.
+;; This file overloads the function insert-directory to implement it
+;; directly from Emacs lisp, without running `ls' in a subprocess.
-;; Useful if you cannot afford to fork Emacs on a real memory UNIX,
+;; It is useful if you cannot afford to fork Emacs on a real memory UNIX,
;; under VMS, or if you don't have the ls program, or if you want
;; different format from what ls offers.
-;; Beware that if you change the output format of dired-ls, you'll
-;; have to change dired-move-to-filename and
-;; dired-move-to-end-of-filename as well.
-
-;; With this package is loaded, dired uses regexps instead of shell
-;; wildcards. If you enter regexps remember to double each $ sign.
-;; For example, to dired all elisp (*.el) files, enter `.*\.el$$',
+;; This function uses regexps instead of shell
+;; wildcards. If you enter regexps remember to double each $ sign.
+;; For example, to include files *.el, enter `.*\.el$$',
;; resulting in the regexp `.*\.el$'.
-;; WARNING ===========================================================
-
-;; With earlier version of this program I sometimes got an internal
-;; Emacs error:
-
-;; Signalling: (wrong-type-argument natnump #<EMACS BUG: ILLEGAL
-;; DATATYPE (#o37777777727) Save your buffers immediately and please
-;; report this bug>)
-
-;; The datatype differs (I also got #o67 once).
-
-;; Sometimes emacs just crashed with a fatal error.
-
-;; After I've avoided using directory-files and file-attributes
-;; together inside a mapcar, the bug didn't surface any longer.
-
;; RESTRICTIONS =====================================================
-;; * ls switches are mostly ignored, see docstring of `dired-ls'.
-
-;; * In Emacs 18: cannot display date of file, displays a fake date
-;; "Jan 00 00:00" instead (dates do work in Emacs 19)
+;; * many ls switches are ignored, see docstring of `insert-directory'.
;; * Only numeric uid/gid
-;; * if you load dired-lisp after ange-ftp, remote listings look
-;; really strange:
-;;
-;; total 1
-;; d????????? -1 -1 -1 -1 Jan 1 1970 .
-;; d????????? -1 -1 -1 -1 Jan 1 1970 ..
-;;
-;; This is because ange-ftp's file-attributes does not return much
-;; useful information.
-;;
-;; If you load dired-lisp first, there seem to be no problems.
-
;; TODO ==============================================================
;; Recognize some more ls switches: R F
\f
+;;; Code:
-(require 'dired) ; we will redefine dired-ls:
-(or (fboundp 'dired-lisp-unix-ls)
- (fset 'dired-lisp-unix-ls (symbol-function 'dired-ls)))
-
-(fset 'dired-ls 'dired-lisp-ls)
-
-(defun dired-lisp-ls (file &optional switches wildcard full-directory-p)
- "dired-lisp.el's version of dired-ls.
-Known switches: A a S r i s
-In Emacs 19, additional known switches are: c u
-Others are ignored.
-
- Insert ls output of FILE, optionally formatted with SWITCHES.
-Optional third arg WILDCARD means treat non-directory part of FILE as
-emacs regexp (_not_ a shell wildcard). If you enter regexps remember
-to double each $ sign.
-
+(defun insert-directory (file &optional switches wildcard full-directory-p)
+ "Insert directory listing for of FILE, formatted according to SWITCHES.
+Leaves point after the inserted text.
+Optional third arg WILDCARD means treat FILE as shell wildcard.
Optional fourth arg FULL-DIRECTORY-P means file is a directory and
-switches do not contain `d'.
-
-SWITCHES default to dired-listing-switches."
- (or switches (setq switches dired-listing-switches))
- (or (consp switches) ; convert to list of chars
- (setq switches (mapcar 'identity switches)))
- (if wildcard
- (setq wildcard (file-name-nondirectory file) ; actually emacs regexp
- ;; perhaps convert it from shell to emacs syntax?
- file (file-name-directory file)))
- (if (or wildcard
- full-directory-p)
- (let* ((dir (file-name-as-directory file))
- (default-directory dir);; so that file-attributes works
- (sum 0)
- elt
- (file-list (directory-files dir nil wildcard))
- file-alist
- ;; do all bindings here for speed
- fil attr)
- (cond ((memq ?A switches)
- (setq file-list
- (dired-lisp-delete-matching "^\\.\\.?$" file-list)))
- ((not (memq ?a switches))
- ;; if neither -A nor -a, flush . files
- (setq file-list
- (dired-lisp-delete-matching "^\\." file-list))))
- (setq file-alist
- (mapcar
- (function
- (lambda (x)
- ;; file-attributes("~bogus") bombs
- (cons x (file-attributes (expand-file-name x)))))
- ;; inserting the call to directory-files right here
- ;; seems to stimulate an Emacs bug
- ;; ILLEGAL DATATYPE (#o37777777727) or #o67
- file-list))
- (insert "total \007\n") ; filled in afterwards
- (setq file-alist
- (dired-lisp-handle-switches file-alist switches))
- (while file-alist
- (setq elt (car file-alist)
- short (car elt)
- attr (cdr elt)
- file-alist (cdr file-alist)
- fil (concat dir short)
- sum (+ sum (nth 7 attr)))
- (insert (dired-lisp-format short attr switches)))
- ;; Fill in total size of all files:
- (save-excursion
- (search-backward "total \007")
- (goto-char (match-end 0))
- (delete-char -1)
- (insert (format "%d" (1+ (/ sum 1024))))))
- ;; if not full-directory-p, FILE *must not* end in /, as
- ;; file-attributes will not recognize a symlink to a directory
- ;; must make it a relative filename as ls does:
- (setq file (file-name-nondirectory file))
- (insert (dired-lisp-format file (file-attributes file) switches))))
-
-(defun dired-lisp-delete-matching (regexp list)
+switches do not contain `d', so that a full listing is expected.
+
+This version of the function comes from `ls-lisp.el'.
+It does not support ordinary shell wildcards; instead, it allows
+regular expressions to match file names.
+
+The switches that work are: A a c i r S s t u"
+ (let ((handler (find-file-name-handler file)))
+ (if handler
+ (funcall handler 'insert-directory file switches
+ wildcard full-directory-p)
+ ;; Convert SWITCHES to a list of characters.
+ (setq switches (append switches nil))
+ (if wildcard
+ (setq wildcard (file-name-nondirectory file) ; actually emacs regexp
+ ;; perhaps convert it from shell to emacs syntax?
+ file (file-name-directory file)))
+ (if (or wildcard
+ full-directory-p)
+ (let* ((dir (file-name-as-directory file))
+ (default-directory dir);; so that file-attributes works
+ (sum 0)
+ elt
+ short
+ (file-list (directory-files dir nil wildcard))
+ file-alist
+ ;; do all bindings here for speed
+ fil attr)
+ (cond ((memq ?A switches)
+ (setq file-list
+ (ls-lisp-delete-matching "^\\.\\.?$" file-list)))
+ ((not (memq ?a switches))
+ ;; if neither -A nor -a, flush . files
+ (setq file-list
+ (ls-lisp-delete-matching "^\\." file-list))))
+ (setq file-alist
+ (mapcar
+ (function
+ (lambda (x)
+ ;; file-attributes("~bogus") bombs
+ (cons x (file-attributes (expand-file-name x)))))
+ ;; inserting the call to directory-files right here
+ ;; seems to stimulate an Emacs bug
+ ;; ILLEGAL DATATYPE (#o37777777727) or #o67
+ file-list))
+ (insert "total \007\n") ; filled in afterwards
+ (setq file-alist
+ (ls-lisp-handle-switches file-alist switches))
+ (while file-alist
+ (setq elt (car file-alist)
+ short (car elt)
+ attr (cdr elt)
+ file-alist (cdr file-alist)
+ fil (concat dir short)
+ sum (+ sum (nth 7 attr)))
+ (insert (ls-lisp-format short attr switches)))
+ ;; Fill in total size of all files:
+ (save-excursion
+ (search-backward "total \007")
+ (goto-char (match-end 0))
+ (delete-char -1)
+ (insert (format "%d" (1+ (/ sum 1024))))))
+ ;; if not full-directory-p, FILE *must not* end in /, as
+ ;; file-attributes will not recognize a symlink to a directory
+ ;; must make it a relative filename as ls does:
+ (setq file (file-name-nondirectory file))
+ (insert (ls-lisp-format file (file-attributes file) switches))))))
+
+(defun ls-lisp-delete-matching (regexp list)
;; Delete all elements matching REGEXP from LIST, return new list.
;; Should perhaps use setcdr for efficiency.
(let (result)
(setq list (cdr list)))
result))
-(defun dired-lisp-handle-switches (file-alist switches)
+(defun ls-lisp-handle-switches (file-alist switches)
;; FILE-ALIST's elements are (FILE . FILE-ATTRIBUTES).
;; Return new alist sorted according to SWITCHES which is a list of
;; characters. Default sorting is alphabetically.
- (setq file-alist
- (sort file-alist
- (cond ((memq ?S switches)
- (function
- (lambda (x y)
- ;; 7th file attribute is file size
- ;; Make largest file come first
- (< (nth 7 (cdr y)) (nth 7 (cdr x))))))
- ;; does Emacs 19 have a way to compare times?
- (t ; sorted alphabetically
- (function
- (lambda (x y)
- (string-lessp (car x) (car y))))))))
+ (let (index)
+ (setq file-alist
+ (sort file-alist
+ (cond ((memq ?S switches) ; sorted on size
+ (function
+ (lambda (x y)
+ ;; 7th file attribute is file size
+ ;; Make largest file come first
+ (< (nth 7 (cdr y))
+ (nth 7 (cdr x))))))
+ ((memq ?t switches) ; sorted on time
+ (setq index (ls-lisp-time-index switches))
+ (function
+ (lambda (x y)
+ (ls-lisp-time-lessp (nth index (cdr y))
+ (nth index (cdr x))))))
+ (t ; sorted alphabetically
+ (function
+ (lambda (x y)
+ (string-lessp (car x)
+ (car y)))))))))
(if (memq ?r switches) ; reverse sort order
(setq file-alist (nreverse file-alist)))
file-alist)
-(defun dired-lisp-format (file-name file-attr &optional switches)
+;; From Roland McGrath. Can use this to sort on time.
+(defun ls-lisp-time-lessp (time0 time1)
+ (let ((hi0 (car time0))
+ (hi1 (car time1))
+ (lo0 (car (cdr time0)))
+ (lo1 (car (cdr time1))))
+ (or (< hi0 hi1)
+ (and (= hi0 hi1)
+ (< lo0 lo1)))))
+
+
+(defun ls-lisp-format (file-name file-attr &optional switches)
(let ((file-type (nth 0 file-attr)))
(concat (if (memq ?i switches) ; inode number
(format "%6d " (nth 10 file-attr)))
;; optional arg.
(format " %3d %-8d %-8d %8d "
(nth 1 file-attr) ; no. of links
- (nth 2 file-attr) ; uid
- (nth 3 file-attr) ; gid
+ (if (= (user-uid) (nth 2 file-attr))
+ (user-login-name)
+ (nth 2 file-attr)) ; uid
+ (if (eq system-type 'ms-dos)
+ "root" ; everything is root on MSDOS.
+ (nth 3 file-attr)) ; gid
(nth 7 file-attr) ; size in bytes
)
- (dired-lisp-format-time file-attr switches)
+ (ls-lisp-format-time file-attr switches)
" "
file-name
(if (stringp file-type) ; is a symbolic link
"\n"
)))
-(defun dired-lisp-format-time (file-attr switches)
+(defun ls-lisp-time-index (switches)
+ ;; Return index into file-attributes according to ls SWITCHES.
+ (cond
+ ((memq ?c switches) 6) ; last mode change
+ ((memq ?u switches) 4) ; last access
+ ;; default is last modtime
+ (t 5)))
+
+(defun ls-lisp-format-time (file-attr switches)
;; Format time string for file with attributes FILE-ATTR according
;; to SWITCHES (a list of ls option letters of which c and u are recognized).
;; file-attributes's time is in a braindead format
;; date "Jan 00 00:00 ".
(condition-case error-data
(let* ((time (current-time-string
- (nth (cond
- ((memq ?c switches) 6) ; last mode change
- ((memq ?u switches) 4) ; last access
- ;; default is last modtime
- (t 5))
- file-attr)))
+ (nth (ls-lisp-time-index switches) file-attr)))
(date (substring time 4 11)) ; "Apr 30 "
(clock (substring time 11 16)) ; "11:27"
(year (substring time 19 24)) ; " 1992"
(error
"Jan 00 00:00")))
-(provide 'dired-lisp)
+(provide 'ls-lisp)
-; eof
+;;; ls-lisp.el ends here