Merge from emacs--rel--22
[bpt/emacs.git] / lisp / eshell / esh-util.el
1 ;;; esh-util.el --- general utilities
2
3 ;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
4 ;; 2008 Free Software Foundation, Inc.
5
6 ;; Author: John Wiegley <johnw@gnu.org>
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 3 of the License, or
13 ;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
22
23 ;;; Commentary:
24
25 ;;; Code:
26
27 (defgroup eshell-util nil
28 "This is general utility code, meant for use by Eshell itself."
29 :tag "General utilities"
30 :group 'eshell)
31
32 ;;; User Variables:
33
34 (defcustom eshell-stringify-t t
35 "*If non-nil, the string representation of t is 't'.
36 If nil, t will be represented only in the exit code of the function,
37 and not printed as a string. This causes Lisp functions to behave
38 similarly to external commands, as far as successful result output."
39 :type 'boolean
40 :group 'eshell-util)
41
42 (defcustom eshell-group-file "/etc/group"
43 "*If non-nil, the name of the group file on your system."
44 :type '(choice (const :tag "No group file" nil) file)
45 :group 'eshell-util)
46
47 (defcustom eshell-passwd-file "/etc/passwd"
48 "*If non-nil, the name of the passwd file on your system."
49 :type '(choice (const :tag "No passwd file" nil) file)
50 :group 'eshell-util)
51
52 (defcustom eshell-hosts-file "/etc/hosts"
53 "*The name of the /etc/hosts file."
54 :type '(choice (const :tag "No hosts file" nil) file)
55 :group 'eshell-util)
56
57 (defcustom eshell-handle-errors t
58 "*If non-nil, Eshell will handle errors itself.
59 Setting this to nil is offered as an aid to debugging only."
60 :type 'boolean
61 :group 'eshell-util)
62
63 (defcustom eshell-private-file-modes 384 ; umask 177
64 "*The file-modes value to use for creating \"private\" files."
65 :type 'integer
66 :group 'eshell-util)
67
68 (defcustom eshell-private-directory-modes 448 ; umask 077
69 "*The file-modes value to use for creating \"private\" directories."
70 :type 'integer
71 :group 'eshell-util)
72
73 (defcustom eshell-tar-regexp
74 "\\.t\\(ar\\(\\.\\(gz\\|bz2\\|Z\\)\\)?\\|gz\\|a[zZ]\\|z2\\)\\'"
75 "*Regular expression used to match tar file names."
76 :type 'regexp
77 :group 'eshell-util)
78
79 (defcustom eshell-convert-numeric-arguments t
80 "*If non-nil, converting arguments of numeric form to Lisp numbers.
81 Numeric form is tested using the regular expression
82 `eshell-number-regexp'.
83
84 NOTE: If you find that numeric conversions are intefering with the
85 specification of filenames (for example, in calling `find-file', or
86 some other Lisp function that deals with files, not numbers), add the
87 following in your .emacs file:
88
89 (put 'find-file 'eshell-no-numeric-conversions t)
90
91 Any function with the property `eshell-no-numeric-conversions' set to
92 a non-nil value, will be passed strings, not numbers, even when an
93 argument matches `eshell-number-regexp'."
94 :type 'boolean
95 :group 'eshell-util)
96
97 (defcustom eshell-number-regexp "-?\\([0-9]*\\.\\)?[0-9]+\\(e[-0-9.]+\\)?"
98 "*Regular expression used to match numeric arguments.
99 If `eshell-convert-numeric-arguments' is non-nil, and an argument
100 matches this regexp, it will be converted to a Lisp number, using the
101 function `string-to-number'."
102 :type 'regexp
103 :group 'eshell-util)
104
105 (defcustom eshell-ange-ls-uids nil
106 "*List of user/host/id strings, used to determine remote ownership."
107 :type '(repeat (cons :tag "Host for User/UID map"
108 (string :tag "Hostname")
109 (repeat (cons :tag "User/UID List"
110 (string :tag "Username")
111 (repeat :tag "UIDs" string)))))
112 :group 'eshell-util)
113
114 ;;; Internal Variables:
115
116 (defvar eshell-group-names nil
117 "A cache to hold the names of groups.")
118
119 (defvar eshell-group-timestamp nil
120 "A timestamp of when the group file was read.")
121
122 (defvar eshell-user-names nil
123 "A cache to hold the names of users.")
124
125 (defvar eshell-user-timestamp nil
126 "A timestamp of when the user file was read.")
127
128 (defvar eshell-host-names nil
129 "A cache the names of frequently accessed hosts.")
130
131 (defvar eshell-host-timestamp nil
132 "A timestamp of when the hosts file was read.")
133
134 ;;; Functions:
135
136 (defsubst eshell-under-windows-p ()
137 "Return non-nil if we are running under MS-DOS/Windows."
138 (memq system-type '(ms-dos windows-nt)))
139
140 (defmacro eshell-condition-case (tag form &rest handlers)
141 "Like `condition-case', but only if `eshell-pass-through-errors' is nil."
142 (if eshell-handle-errors
143 `(condition-case ,tag
144 ,form
145 ,@handlers)
146 form))
147
148 (put 'eshell-condition-case 'lisp-indent-function 2)
149
150 (defmacro eshell-deftest (module name label &rest forms)
151 (if (and (fboundp 'cl-compiling-file) (cl-compiling-file))
152 nil
153 (let ((fsym (intern (concat "eshell-test--" (symbol-name name)))))
154 `(eval-when-compile
155 (ignore
156 (defun ,fsym () ,label
157 (eshell-run-test (quote ,module) (quote ,fsym) ,label
158 (quote (progn ,@forms)))))))))
159
160 (put 'eshell-deftest 'lisp-indent-function 2)
161
162 (defun eshell-find-delimiter
163 (open close &optional bound reverse-p backslash-p)
164 "From point, find the CLOSE delimiter corresponding to OPEN.
165 The matching is bounded by BOUND.
166 If REVERSE-P is non-nil, process the region backwards.
167 If BACKSLASH-P is non-nil, and OPEN and CLOSE are the same character,
168 then quoting is done by a backslash, rather than a doubled delimiter."
169 (save-excursion
170 (let ((depth 1)
171 (bound (or bound (point-max))))
172 (if (if reverse-p
173 (eq (char-before) close)
174 (eq (char-after) open))
175 (forward-char (if reverse-p -1 1)))
176 (while (and (> depth 0)
177 (funcall (if reverse-p '> '<) (point) bound))
178 (let ((c (if reverse-p (char-before) (char-after))) nc)
179 (cond ((and (not reverse-p)
180 (or (not (eq open close))
181 backslash-p)
182 (eq c ?\\)
183 (setq nc (char-after (1+ (point))))
184 (or (eq nc open) (eq nc close)))
185 (forward-char 1))
186 ((and reverse-p
187 (or (not (eq open close))
188 backslash-p)
189 (or (eq c open) (eq c close))
190 (eq (char-before (1- (point)))
191 ?\\))
192 (forward-char -1))
193 ((eq open close)
194 (if (eq c open)
195 (if (and (not backslash-p)
196 (eq (if reverse-p
197 (char-before (1- (point)))
198 (char-after (1+ (point)))) open))
199 (forward-char (if reverse-p -1 1))
200 (setq depth (1- depth)))))
201 ((= c open)
202 (setq depth (+ depth (if reverse-p -1 1))))
203 ((= c close)
204 (setq depth (+ depth (if reverse-p 1 -1))))))
205 (forward-char (if reverse-p -1 1)))
206 (if (= depth 0)
207 (if reverse-p (point) (1- (point)))))))
208
209 (defun eshell-convert (string)
210 "Convert STRING into a more native looking Lisp object."
211 (if (not (stringp string))
212 string
213 (let ((len (length string)))
214 (if (= len 0)
215 string
216 (if (eq (aref string (1- len)) ?\n)
217 (setq string (substring string 0 (1- len))))
218 (if (string-match "\n" string)
219 (split-string string "\n")
220 (if (and eshell-convert-numeric-arguments
221 (string-match
222 (concat "\\`\\s-*" eshell-number-regexp
223 "\\s-*\\'") string))
224 (string-to-number string)
225 string))))))
226
227 (defun eshell-sublist (l &optional n m)
228 "Return from LIST the N to M elements.
229 If N or M is nil, it means the end of the list."
230 (let* ((a (copy-sequence l))
231 result)
232 (if (and m (consp (nthcdr m a)))
233 (setcdr (nthcdr m a) nil))
234 (if n
235 (setq a (nthcdr n a))
236 (setq n (1- (length a))
237 a (last a)))
238 a))
239
240 (defun eshell-split-path (path)
241 "Split a path into multiple subparts."
242 (let ((len (length path))
243 (i 0) (li 0)
244 parts)
245 (if (and (eshell-under-windows-p)
246 (> len 2)
247 (eq (aref path 0) ?/)
248 (eq (aref path 1) ?/))
249 (setq i 2))
250 (while (< i len)
251 (if (and (eq (aref path i) ?/)
252 (not (get-text-property i 'escaped path)))
253 (setq parts (cons (if (= li i) "/"
254 (substring path li (1+ i))) parts)
255 li (1+ i)))
256 (setq i (1+ i)))
257 (if (< li i)
258 (setq parts (cons (substring path li i) parts)))
259 (if (and (eshell-under-windows-p)
260 (string-match "\\`[A-Za-z]:\\'" (car (last parts))))
261 (setcar (last parts) (concat (car (last parts)) "/")))
262 (nreverse parts)))
263
264 (defun eshell-to-flat-string (value)
265 "Make value a string. If separated by newlines change them to spaces."
266 (let ((text (eshell-stringify value)))
267 (if (string-match "\n+\\'" text)
268 (setq text (replace-match "" t t text)))
269 (while (string-match "\n+" text)
270 (setq text (replace-match " " t t text)))
271 text))
272
273 (defmacro eshell-for (for-var for-list &rest forms)
274 "Iterate through a list"
275 `(let ((list-iter ,for-list))
276 (while list-iter
277 (let ((,for-var (car list-iter)))
278 ,@forms)
279 (setq list-iter (cdr list-iter)))))
280
281 (put 'eshell-for 'lisp-indent-function 2)
282
283 (defun eshell-flatten-list (args)
284 "Flatten any lists within ARGS, so that there are no sublists."
285 (let ((new-list (list t)))
286 (eshell-for a args
287 (if (and (listp a)
288 (listp (cdr a)))
289 (nconc new-list (eshell-flatten-list a))
290 (nconc new-list (list a))))
291 (cdr new-list)))
292
293 (defun eshell-uniqify-list (l)
294 "Remove occurring multiples in L. You probably want to sort first."
295 (let ((m l))
296 (while m
297 (while (and (cdr m)
298 (string= (car m)
299 (cadr m)))
300 (setcdr m (cddr m)))
301 (setq m (cdr m))))
302 l)
303
304 (defun eshell-stringify (object)
305 "Convert OBJECT into a string value."
306 (cond
307 ((stringp object) object)
308 ((and (listp object)
309 (not (eq object nil)))
310 (let ((string (pp-to-string object)))
311 (substring string 0 (1- (length string)))))
312 ((numberp object)
313 (number-to-string object))
314 (t
315 (unless (and (eq object t)
316 (not eshell-stringify-t))
317 (pp-to-string object)))))
318
319 (defsubst eshell-stringify-list (args)
320 "Convert each element of ARGS into a string value."
321 (mapcar 'eshell-stringify args))
322
323 (defsubst eshell-flatten-and-stringify (&rest args)
324 "Flatten and stringify all of the ARGS into a single string."
325 (mapconcat 'eshell-stringify (eshell-flatten-list args) " "))
326
327 ;; the next two are from GNUS, and really should be made part of Emacs
328 ;; some day
329 (defsubst eshell-time-less-p (t1 t2)
330 "Say whether time T1 is less than time T2."
331 (or (< (car t1) (car t2))
332 (and (= (car t1) (car t2))
333 (< (nth 1 t1) (nth 1 t2)))))
334
335 (defsubst eshell-time-to-seconds (time)
336 "Convert TIME to a floating point number."
337 (+ (* (car time) 65536.0)
338 (cadr time)
339 (/ (or (car (cdr (cdr time))) 0) 1000000.0)))
340
341 (defsubst eshell-directory-files (regexp &optional directory)
342 "Return a list of files in the given DIRECTORY matching REGEXP."
343 (directory-files (or directory default-directory)
344 directory regexp))
345
346 (defun eshell-regexp-arg (prompt)
347 "Return list of regexp and prefix arg using PROMPT."
348 (let* (;; Don't clobber this.
349 (last-command last-command)
350 (regexp (read-from-minibuffer prompt nil nil nil
351 'minibuffer-history-search-history)))
352 (list (if (string-equal regexp "")
353 (setcar minibuffer-history-search-history
354 (nth 1 minibuffer-history-search-history))
355 regexp)
356 (prefix-numeric-value current-prefix-arg))))
357
358 (defun eshell-printable-size (filesize &optional human-readable
359 block-size use-colors)
360 "Return a printable FILESIZE."
361 (let ((size (float (or filesize 0))))
362 (if human-readable
363 (if (< size human-readable)
364 (if (= (round size) 0)
365 "0"
366 (if block-size
367 "1.0k"
368 (format "%.0f" size)))
369 (setq size (/ size human-readable))
370 (if (< size human-readable)
371 (if (<= size 9.94)
372 (format "%.1fk" size)
373 (format "%.0fk" size))
374 (setq size (/ size human-readable))
375 (if (< size human-readable)
376 (let ((str (if (<= size 9.94)
377 (format "%.1fM" size)
378 (format "%.0fM" size))))
379 (if use-colors
380 (put-text-property 0 (length str)
381 'face 'bold str))
382 str)
383 (setq size (/ size human-readable))
384 (if (< size human-readable)
385 (let ((str (if (<= size 9.94)
386 (format "%.1fG" size)
387 (format "%.0fG" size))))
388 (if use-colors
389 (put-text-property 0 (length str)
390 'face 'bold-italic str))
391 str)))))
392 (if block-size
393 (setq size (/ size block-size)))
394 (format "%.0f" size))))
395
396 (defun eshell-winnow-list (entries exclude &optional predicates)
397 "Pare down the ENTRIES list using the EXCLUDE regexp, and PREDICATES.
398 The original list is not affected. If the result is only one element
399 long, it will be returned itself, rather than returning a one-element
400 list."
401 (let ((flist (list t))
402 valid p listified)
403 (unless (listp entries)
404 (setq entries (list entries)
405 listified t))
406 (eshell-for entry entries
407 (unless (and exclude (string-match exclude entry))
408 (setq p predicates valid (null p))
409 (while p
410 (if (funcall (car p) entry)
411 (setq valid t)
412 (setq p nil valid nil))
413 (setq p (cdr p)))
414 (when valid
415 (nconc flist (list entry)))))
416 (if listified
417 (cadr flist)
418 (cdr flist))))
419
420 (defsubst eshell-redisplay ()
421 "Allow Emacs to redisplay buffers."
422 ;; for some strange reason, Emacs 21 is prone to trigger an
423 ;; "args out of range" error in `sit-for', if this function
424 ;; runs while point is in the minibuffer and the users attempt
425 ;; to use completion. Don't ask me.
426 (condition-case nil
427 (sit-for 0 0)
428 (error nil)))
429
430 (defun eshell-read-passwd-file (file)
431 "Return an alist correlating gids to group names in FILE."
432 (let (names)
433 (when (file-readable-p file)
434 (with-temp-buffer
435 (insert-file-contents file)
436 (goto-char (point-min))
437 (while (not (eobp))
438 (let* ((fields
439 (split-string (buffer-substring
440 (point) (progn (end-of-line)
441 (point))) ":")))
442 (if (and (and fields (nth 0 fields) (nth 2 fields))
443 (not (assq (string-to-number (nth 2 fields)) names)))
444 (setq names (cons (cons (string-to-number (nth 2 fields))
445 (nth 0 fields))
446 names))))
447 (forward-line))))
448 names))
449
450 (defun eshell-read-passwd (file result-var timestamp-var)
451 "Read the contents of /etc/passwd for user names."
452 (if (or (not (symbol-value result-var))
453 (not (symbol-value timestamp-var))
454 (eshell-time-less-p
455 (symbol-value timestamp-var)
456 (nth 5 (file-attributes file))))
457 (progn
458 (set result-var (eshell-read-passwd-file file))
459 (set timestamp-var (current-time))))
460 (symbol-value result-var))
461
462 (defun eshell-read-group-names ()
463 "Read the contents of /etc/group for group names."
464 (if eshell-group-file
465 (eshell-read-passwd eshell-group-file 'eshell-group-names
466 'eshell-group-timestamp)))
467
468 (defsubst eshell-group-id (name)
469 "Return the user id for user NAME."
470 (car (rassoc name (eshell-read-group-names))))
471
472 (defsubst eshell-group-name (gid)
473 "Return the group name for the given GID."
474 (cdr (assoc gid (eshell-read-group-names))))
475
476 (defun eshell-read-user-names ()
477 "Read the contents of /etc/passwd for user names."
478 (if eshell-passwd-file
479 (eshell-read-passwd eshell-passwd-file 'eshell-user-names
480 'eshell-user-timestamp)))
481
482 (defsubst eshell-user-id (name)
483 "Return the user id for user NAME."
484 (car (rassoc name (eshell-read-user-names))))
485
486 (defalias 'eshell-user-name 'user-login-name)
487
488 (defun eshell-read-hosts-file (filename)
489 "Read in the hosts from the /etc/hosts file."
490 (let (hosts)
491 (with-temp-buffer
492 (insert-file-contents eshell-hosts-file)
493 (goto-char (point-min))
494 (while (re-search-forward
495 "^\\(\\S-+\\)\\s-+\\(\\S-+\\)\\(\\s-*\\(\\S-+\\)\\)?" nil t)
496 (if (match-string 1)
497 (add-to-list 'hosts (match-string 1)))
498 (if (match-string 2)
499 (add-to-list 'hosts (match-string 2)))
500 (if (match-string 4)
501 (add-to-list 'hosts (match-string 4)))))
502 (sort hosts 'string-lessp)))
503
504 (defun eshell-read-hosts (file result-var timestamp-var)
505 "Read the contents of /etc/passwd for user names."
506 (if (or (not (symbol-value result-var))
507 (not (symbol-value timestamp-var))
508 (eshell-time-less-p
509 (symbol-value timestamp-var)
510 (nth 5 (file-attributes file))))
511 (progn
512 (set result-var (eshell-read-hosts-file file))
513 (set timestamp-var (current-time))))
514 (symbol-value result-var))
515
516 (defun eshell-read-host-names ()
517 "Read the contents of /etc/hosts for host names."
518 (if eshell-hosts-file
519 (eshell-read-hosts eshell-hosts-file 'eshell-host-names
520 'eshell-host-timestamp)))
521
522 (unless (fboundp 'line-end-position)
523 (defsubst line-end-position (&optional N)
524 (save-excursion (end-of-line N) (point))))
525
526 (unless (fboundp 'line-beginning-position)
527 (defsubst line-beginning-position (&optional N)
528 (save-excursion (beginning-of-line N) (point))))
529
530 (unless (fboundp 'subst-char-in-string)
531 (defun subst-char-in-string (fromchar tochar string &optional inplace)
532 "Replace FROMCHAR with TOCHAR in STRING each time it occurs.
533 Unless optional argument INPLACE is non-nil, return a new string."
534 (let ((i (length string))
535 (newstr (if inplace string (copy-sequence string))))
536 (while (> i 0)
537 (setq i (1- i))
538 (if (eq (aref newstr i) fromchar)
539 (aset newstr i tochar)))
540 newstr)))
541
542 (defsubst eshell-copy-environment ()
543 "Return an unrelated copy of `process-environment'."
544 (mapcar 'concat process-environment))
545
546 (defun eshell-subgroups (groupsym)
547 "Return all of the subgroups of GROUPSYM."
548 (let ((subgroups (get groupsym 'custom-group))
549 (subg (list t)))
550 (while subgroups
551 (if (eq (cadr (car subgroups)) 'custom-group)
552 (nconc subg (list (caar subgroups))))
553 (setq subgroups (cdr subgroups)))
554 (cdr subg)))
555
556 (defmacro eshell-with-file-modes (modes &rest forms)
557 "Evaluate, with file-modes set to MODES, the given FORMS."
558 `(let ((modes (default-file-modes)))
559 (set-default-file-modes ,modes)
560 (unwind-protect
561 (progn ,@forms)
562 (set-default-file-modes modes))))
563
564 (defmacro eshell-with-private-file-modes (&rest forms)
565 "Evaluate FORMS with private file modes set."
566 `(eshell-with-file-modes ,eshell-private-file-modes ,@forms))
567
568 (defsubst eshell-make-private-directory (dir &optional parents)
569 "Make DIR with file-modes set to `eshell-private-directory-modes'."
570 (eshell-with-file-modes eshell-private-directory-modes
571 (make-directory dir parents)))
572
573 (defsubst eshell-substring (string sublen)
574 "Return the beginning of STRING, up to SUBLEN bytes."
575 (if string
576 (if (> (length string) sublen)
577 (substring string 0 sublen)
578 string)))
579
580 (unless (fboundp 'directory-files-and-attributes)
581 (defun directory-files-and-attributes (directory &optional full match nosort)
582 "Return a list of names of files and their attributes in DIRECTORY.
583 There are three optional arguments:
584 If FULL is non-nil, return absolute file names. Otherwise return names
585 that are relative to the specified directory.
586 If MATCH is non-nil, mention only file names that match the regexp MATCH.
587 If NOSORT is non-nil, the list is not sorted--its order is unpredictable.
588 NOSORT is useful if you plan to sort the result yourself."
589 (let ((directory (expand-file-name directory)) ange-cache)
590 (mapcar
591 (function
592 (lambda (file)
593 (cons file (eshell-file-attributes (expand-file-name file directory)))))
594 (directory-files directory full match nosort)))))
595
596 (defvar ange-cache)
597
598 (defun eshell-directory-files-and-attributes (dir &optional full match nosort)
599 "Make sure to use the handler for `directory-file-and-attributes'."
600 (let* ((dir (expand-file-name dir))
601 (dfh (find-file-name-handler dir 'directory-files)))
602 (if (not dfh)
603 (directory-files-and-attributes dir full match nosort)
604 (let ((files (funcall dfh 'directory-files dir full match nosort))
605 (fah (find-file-name-handler dir 'file-attributes)))
606 (mapcar
607 (function
608 (lambda (file)
609 (cons file (if fah
610 (eshell-file-attributes
611 (expand-file-name file dir))
612 (file-attributes (expand-file-name file dir))))))
613 files)))))
614
615 (defun eshell-current-ange-uids ()
616 (if (string-match "/\\([^@]+\\)@\\([^:]+\\):" default-directory)
617 (let* ((host (match-string 2 default-directory))
618 (user (match-string 1 default-directory))
619 (host-users (assoc host eshell-ange-ls-uids)))
620 (when host-users
621 (setq host-users (cdr host-users))
622 (cdr (assoc user host-users))))))
623
624 ;; Add an autoload for parse-time-string
625 (if (and (not (fboundp 'parse-time-string))
626 (locate-library "parse-time"))
627 (autoload 'parse-time-string "parse-time"))
628
629 (eval-when-compile
630 (require 'ange-ftp nil t))
631
632 (defun eshell-parse-ange-ls (dir)
633 (let (entry)
634 (with-temp-buffer
635 (insert (ange-ftp-ls dir "-la" nil))
636 (goto-char (point-min))
637 (if (looking-at "^total [0-9]+$")
638 (forward-line 1))
639 ;; Some systems put in a blank line here.
640 (if (eolp) (forward-line 1))
641 (while (looking-at
642 `,(concat "\\([dlscb-][rwxst-]+\\)"
643 "\\s-*" "\\([0-9]+\\)" "\\s-+"
644 "\\(\\S-+\\)" "\\s-+"
645 "\\(\\S-+\\)" "\\s-+"
646 "\\([0-9]+\\)" "\\s-+" "\\(.*\\)"))
647 (let* ((perms (match-string 1))
648 (links (string-to-number (match-string 2)))
649 (user (match-string 3))
650 (group (match-string 4))
651 (size (string-to-number (match-string 5)))
652 (mtime
653 (if (fboundp 'parse-time-string)
654 (let ((moment (parse-time-string
655 (match-string 6))))
656 (if (nth 0 moment)
657 (setcar (nthcdr 5 moment)
658 (nth 5 (decode-time (current-time))))
659 (setcar (nthcdr 0 moment) 0)
660 (setcar (nthcdr 1 moment) 0)
661 (setcar (nthcdr 2 moment) 0))
662 (apply 'encode-time moment))
663 (ange-ftp-file-modtime (expand-file-name name dir))))
664 (name (ange-ftp-parse-filename))
665 symlink)
666 (if (string-match "\\(.+\\) -> \\(.+\\)" name)
667 (setq symlink (match-string 2 name)
668 name (match-string 1 name)))
669 (setq entry
670 (cons
671 (cons name
672 (list (if (eq (aref perms 0) ?d)
673 t
674 symlink)
675 links user group
676 nil mtime nil
677 size perms nil nil)) entry)))
678 (forward-line)))
679 entry))
680
681 (defun eshell-file-attributes (file)
682 "Return the attributes of FILE, playing tricks if it's over ange-ftp."
683 (let* ((file (expand-file-name file))
684 (handler (find-file-name-handler file 'file-attributes))
685 entry)
686 (if (not handler)
687 (file-attributes file)
688 (if (eq (find-file-name-handler (file-name-directory file)
689 'directory-files)
690 'ange-ftp-hook-function)
691 (let ((base (file-name-nondirectory file))
692 (dir (file-name-directory file)))
693 (if (boundp 'ange-cache)
694 (setq entry (cdr (assoc base (cdr (assoc dir ange-cache))))))
695 (unless entry
696 (setq entry (eshell-parse-ange-ls dir))
697 (if (boundp 'ange-cache)
698 (setq ange-cache
699 (cons (cons dir entry)
700 ange-cache)))
701 (if entry
702 (let ((fentry (assoc base (cdr entry))))
703 (if fentry
704 (setq entry (cdr fentry))
705 (setq entry nil)))))))
706 (or entry (funcall handler 'file-attributes file)))))
707
708 (defalias 'eshell-copy-tree 'copy-tree)
709
710 (defsubst eshell-processp (proc)
711 "If the `processp' function does not exist, PROC is not a process."
712 (and (fboundp 'processp) (processp proc)))
713
714 ; (defun eshell-copy-file
715 ; (file newname &optional ok-if-already-exists keep-date)
716 ; "Copy FILE to NEWNAME. See docs for `copy-file'."
717 ; (let (copied)
718 ; (if (string-match "\\`\\([^:]+\\):\\(.*\\)" file)
719 ; (let ((front (match-string 1 file))
720 ; (back (match-string 2 file))
721 ; buffer)
722 ; (if (and front (string-match eshell-tar-regexp front)
723 ; (setq buffer (find-file-noselect front)))
724 ; (with-current-buffer buffer
725 ; (goto-char (point-min))
726 ; (if (re-search-forward (concat " " (regexp-quote back)
727 ; "$") nil t)
728 ; (progn
729 ; (tar-copy (if (file-directory-p newname)
730 ; (expand-file-name
731 ; (file-name-nondirectory back) newname)
732 ; newname))
733 ; (setq copied t))
734 ; (error "%s not found in tar file %s" back front))))))
735 ; (unless copied
736 ; (copy-file file newname ok-if-already-exists keep-date))))
737
738 ; (defun eshell-file-attributes (filename)
739 ; "Return a list of attributes of file FILENAME.
740 ; See the documentation for `file-attributes'."
741 ; (let (result)
742 ; (when (string-match "\\`\\([^:]+\\):\\(.*\\)\\'" filename)
743 ; (let ((front (match-string 1 filename))
744 ; (back (match-string 2 filename))
745 ; buffer)
746 ; (when (and front (string-match eshell-tar-regexp front)
747 ; (setq buffer (find-file-noselect front)))
748 ; (with-current-buffer buffer
749 ; (goto-char (point-min))
750 ; (when (re-search-forward (concat " " (regexp-quote back)
751 ; "\\s-*$") nil t)
752 ; (let* ((descrip (tar-current-descriptor))
753 ; (tokens (tar-desc-tokens descrip)))
754 ; (setq result
755 ; (list
756 ; (cond
757 ; ((eq (tar-header-link-type tokens) 5)
758 ; t)
759 ; ((eq (tar-header-link-type tokens) t)
760 ; (tar-header-link-name tokens)))
761 ; 1
762 ; (tar-header-uid tokens)
763 ; (tar-header-gid tokens)
764 ; (tar-header-date tokens)
765 ; (tar-header-date tokens)
766 ; (tar-header-date tokens)
767 ; (tar-header-size tokens)
768 ; (concat
769 ; (cond
770 ; ((eq (tar-header-link-type tokens) 5) "d")
771 ; ((eq (tar-header-link-type tokens) t) "l")
772 ; (t "-"))
773 ; (tar-grind-file-mode (tar-header-mode tokens)
774 ; (make-string 9 ? ) 0))
775 ; nil nil nil))))))))
776 ; (or result
777 ; (file-attributes filename))))
778
779 (provide 'esh-util)
780
781 ;; arch-tag: 70159778-5c7a-480a-bae4-3ad332fca19d
782 ;;; esh-util.el ends here