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authorJoseph Arceneaux <jla@gnu.org>1990-05-24 21:53:05 +0000
committerJoseph Arceneaux <jla@gnu.org>1990-05-24 21:53:05 +0000
commitd29ad5d3b70229206b6c9fd4dff3e2e33d08ed39 (patch)
tree2d10b5a7e39a99229b9839ccd275379d191f2c9e /lisp/=ftp.el
parentfa0f81a0c119c63efc53dc7f46501ad676b10101 (diff)
downloademacs-d29ad5d3b70229206b6c9fd4dff3e2e33d08ed39.tar.gz
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+;; File input and output over Internet using FTP
+;; Copyright (C) 1987 Free Software Foundation, Inc.
+;; Author mly@prep.ai.mit.edu.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 1, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING. If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;; Prevent changes in major modes from altering these variables.
+(put 'ftp-temp-file-name 'permanent-local t)
+(put 'ftp-file 'permanent-local t)
+(put 'ftp-host 'permanent-local t)
+
+;; you can turn this off by doing
+;; (setq ftp-password-alist 'compulsory-urinalysis)
+(defvar ftp-password-alist () "Security sucks")
+
+(defun read-ftp-user-password (host user new)
+ (let (tem)
+ (if (and (not new)
+ (listp ftp-password-alist)
+ (setq tem (cdr (assoc host ftp-password-alist)))
+ (or (null user)
+ (string= user (car tem))))
+ tem
+ (or user
+ (progn
+ (setq tem (or (and (listp ftp-password-alist)
+ (car (cdr (assoc host ftp-password-alist))))
+ (user-login-name)))
+ (setq user (read-string (format
+ "User-name for %s (default \"%s\"): "
+ host tem)))
+ (if (equal user "") (setq user tem))))
+ (setq tem (cons user
+ ;; If you want to use some non-echoing string-reader,
+ ;; feel free to write it yourself. I don't care enough.
+ (read-string (format "Password for %s@%s: " user host)
+ (if (not (listp ftp-password-alist))
+ ""
+ (or (cdr (cdr (assoc host ftp-password-alist)))
+ (let ((l ftp-password-alist))
+ (catch 'foo
+ (while l
+ (if (string= (car (cdr (car l))) user)
+ (throw 'foo (cdr (cdr (car l))))
+ (setq l (cdr l))))
+ nil))
+ "")))))
+ (message "")
+ (if (and (listp ftp-password-alist)
+ (not (string= (cdr tem) "")))
+ (setq ftp-password-alist (cons (cons host tem)
+ ftp-password-alist)))
+ tem)))
+
+(defun ftp-read-file-name (prompt)
+ (let ((s ""))
+ (while (not (string-match "\\`[ \t]*\\([^ \t:]+\\)[ \t]*:\\(.+\\)\\'" s))
+ (setq s (read-string prompt s)))
+ (list (substring s (match-beginning 1) (match-end 1))
+ (substring s (match-beginning 2) (match-end 2)))))
+
+
+(defun ftp-find-file (host file &optional user password)
+ "FTP to HOST to get FILE, logging in as USER with password PASSWORD.
+Interactively, HOST and FILE are specified by reading a string with
+ a colon character separating the host from the filename.
+USER and PASSWORD are defaulted from the values used when
+ last ftping from HOST (unless password-remembering is disabled).
+ Supply a password of the symbol `t' to override this default
+ (interactively, this is done by giving a prefix arg)"
+ (interactive
+ (append (ftp-read-file-name "FTP get host:file: ")
+ (list nil (not (null current-prefix-arg)))))
+ (ftp-find-file-or-directory host file t user password))
+
+(defun ftp-list-directory (host file &optional user password)
+ "FTP to HOST to list DIRECTORY, logging in as USER with password PASSWORD.
+Interactively, HOST and FILE are specified by reading a string with
+ a colon character separating the host from the filename.
+USER and PASSWORD are defaulted from the values used when
+ last ftping from HOST (unless password-remembering is disabled).
+ Supply a password of the symbol `t' to override this default
+ (interactively, this is done by giving a prefix arg)"
+ (interactive
+ (append (ftp-read-file-name "FTP get host:directory: ")
+ (list nil (not (null current-prefix-arg)))))
+ (ftp-find-file-or-directory host file nil user password))
+
+(defun ftp-find-file-or-directory (host file filep &optional user password)
+ "FTP to HOST to get FILE. Third arg is t for file, nil for directory.
+Log in as USER with PASSWORD. If USER is nil or PASSWORD is nil or t,
+we prompt for the user name and password."
+ (or (and user password (not (eq password t)))
+ (progn (setq user (read-ftp-user-password host user (eq password t))
+ password (cdr user)
+ user (car user))))
+ (let ((buffer (get-buffer-create (format "*ftp%s %s:%s*"
+ (if filep "" "-directory")
+ host file))))
+ (set-buffer buffer)
+ (let ((process nil)
+ (case-fold-search nil))
+ (let ((win nil))
+ (unwind-protect
+ (progn
+ (setq process (ftp-setup-buffer host file))
+ (if (setq win (ftp-login process host user password))
+ (message "Logged in")
+ (error "Ftp login failed")))
+ (or win (and process (delete-process process)))))
+ (message "Opening %s %s:%s..." (if filep "file" "directory")
+ host file)
+ (if (ftp-command process
+ (format "%s \"%s\" -\nquit\n" (if filep "get" "dir")
+ file)
+ "\\(150\\|125\\).*\n"
+ "200.*\n")
+ (progn (forward-line 1)
+ (let ((buffer-read-only nil))
+ (delete-region (point-min) (point)))
+ (message "Retrieving %s:%s in background. Bye!" host file)
+ (set-process-sentinel process
+ 'ftp-asynchronous-input-sentinel)
+ process)
+ (switch-to-buffer buffer)
+ (let ((buffer-read-only nil))
+ (insert-before-markers "<<<Ftp lost>>>"))
+ (delete-process process)
+ (error "Ftp %s:%s lost" host file)))))
+
+
+(defun ftp-write-file (host file &optional user password)
+ "FTP to HOST to write FILE, logging in as USER with password PASSWORD.
+Interactively, HOST and FILE are specified by reading a string with colon
+separating the host from the filename.
+USER and PASSWORD are defaulted from the values used when
+ last ftping from HOST (unless password-remembering is disabled).
+ Supply a password of the symbol `t' to override this default
+ (interactively, this is done by giving a prefix arg)"
+ (interactive
+ (append (ftp-read-file-name "FTP write host:file: ")
+ (list nil (not (null current-prefix-arg)))))
+ (or (and user password (not (eq password t)))
+ (progn (setq user (read-ftp-user-password host user (eq password t))
+ password (cdr user)
+ user (car user))))
+ (let ((buffer (get-buffer-create (format "*ftp %s:%s*" host file)))
+ (tmp (make-temp-name "/tmp/emacsftp")))
+ (write-region (point-min) (point-max) tmp)
+ (save-excursion
+ (set-buffer buffer)
+ (make-local-variable 'ftp-temp-file-name)
+ (setq ftp-temp-file-name tmp)
+ (let ((process (ftp-setup-buffer host file))
+ (case-fold-search nil))
+ (let ((win nil))
+ (unwind-protect
+ (if (setq win (ftp-login process host user password))
+ (message "Logged in")
+ (error "Ftp login lost"))
+ (or win (delete-process process))))
+ (message "Opening file %s:%s..." host file)
+ (if (ftp-command process
+ (format "send \"%s\" \"%s\"\nquit\n" tmp file)
+ "150.*\n"
+ "200.*\n")
+ (progn (forward-line 1)
+ (setq foo1 (current-buffer))
+ (let ((buffer-read-only nil))
+ (delete-region (point-min) (point)))
+ (message "Saving %s:%s in background. Bye!" host file)
+ (set-process-sentinel process
+ 'ftp-asynchronous-output-sentinel)
+ process)
+ (switch-to-buffer buffer)
+ (setq foo2 (current-buffer))
+ (let ((buffer-read-only nil))
+ (insert-before-markers "<<<Ftp lost>>>"))
+ (delete-process process)
+ (error "Ftp write %s:%s lost" host file))))))
+
+
+(defun ftp-setup-buffer (host file)
+ (fundamental-mode)
+ (and (get-buffer-process (current-buffer))
+ (progn (discard-input)
+ (if (y-or-n-p (format "Kill process \"%s\" in %s? "
+ (process-name (get-buffer-process
+ (current-buffer)))
+ (buffer-name (current-buffer))))
+ (while (get-buffer-process (current-buffer))
+ (kill-process (get-buffer-process (current-buffer))))
+ (error "Foo"))))
+ ;(buffer-disable-undo (current-buffer))
+ (setq buffer-read-only nil)
+ (erase-buffer)
+ (make-local-variable 'ftp-host)
+ (setq ftp-host host)
+ (make-local-variable 'ftp-file)
+ (setq ftp-file file)
+ (setq foo3 (current-buffer))
+ (setq buffer-read-only t)
+ (start-process "ftp" (current-buffer) "ftp" "-i" "-n" "-g"))
+
+
+(defun ftp-login (process host user password)
+ (message "FTP logging in as %s@%s..." user host)
+ (if (ftp-command process
+ (format "open %s\nuser %s %s\n" host user password)
+ "230.*\n"
+ "\\(Connected to \\|220\\|331\\|Remote system type\\|Using.*mode\\|Remember to set\\).*\n")
+ t
+ (switch-to-buffer (process-buffer process))
+ (delete-process process)
+ (if (listp ftp-password-alist)
+ (setq ftp-password-alist (delq (assoc host ftp-password-alist)
+ ftp-password-alist)))
+ nil))
+
+(defun ftp-command (process command win ignore)
+ (process-send-string process command)
+ (let ((p 1))
+ (while (numberp p)
+ (cond ;((not (bolp)))
+ ((looking-at win)
+ (goto-char (point-max))
+ (setq p t))
+ ((looking-at "^ftp> \\|^\n")
+ (goto-char (match-end 0)))
+ ((looking-at ignore)
+ (forward-line 1))
+ ((not (search-forward "\n" nil t))
+ ;; the way asynchronous process-output fucks with (point)
+ ;; is really really disgusting.
+ (setq p (point))
+ (condition-case ()
+ (accept-process-output process)
+ (error nil))
+ (goto-char p))
+ (t
+ (setq p nil))))
+ p))
+
+
+(defun ftp-asynchronous-input-sentinel (process msg)
+ (ftp-sentinel process msg t t))
+(defun ftp-synchronous-input-sentinel (process msg)
+ (ftp-sentinel process msg nil t))
+(defun ftp-asynchronous-output-sentinel (process msg)
+ (ftp-sentinel process msg t nil))
+(defun ftp-synchronous-output-sentinel (process msg)
+ (ftp-sentinel process msg nil nil))
+
+(defun ftp-sentinel (process msg asynchronous input)
+ (cond ((null (buffer-name (process-buffer process)))
+ ;; deleted buffer
+ (set-process-buffer process nil))
+ ((and (eq (process-status process) 'exit)
+ (= (process-exit-status process) 0))
+ (save-excursion
+ (set-buffer (process-buffer process))
+ (let (msg
+ (r (if input "[0-9]+ bytes received in [0-9]+\\.[0-9]+ seconds.*$" "[0-9]+ bytes sent in [0-9]+\\.[0-9]+ seconds.*$")))
+ (let ((buffer-read-only nil))
+ (goto-char (point-max))
+ (search-backward "226 ")
+ (if (looking-at r)
+ (search-backward "226 "))
+ (let ((p (point)))
+ (setq msg (concat (format "ftp %s %s:%s done"
+ (if input "read" "write")
+ ftp-host ftp-file)
+ (if (re-search-forward r nil t)
+ (concat ": " (buffer-substring
+ (match-beginning 0)
+ (match-end 0)))
+ "")))
+ (delete-region p (point-max))
+ (save-excursion
+ (set-buffer (get-buffer-create "*ftp log*"))
+ (let ((buffer-read-only nil))
+ (insert msg ?\n)))))
+ ;; Note the preceding let must end here
+ ;; so it doesn't cross the (kill-buffer (current-buffer)).
+ (if (not input)
+ (progn
+ (condition-case ()
+ (and (boundp 'ftp-temp-file-name)
+ ftp-temp-file-name
+ (delete-file ftp-temp-file-name))
+ (error nil))
+ ;; Kill the temporary buffer which the ftp process
+ ;; puts its output in.
+ (kill-buffer (current-buffer)))
+ ;; You don't want to look at this.
+ (let ((kludge (generate-new-buffer (format "%s:%s (ftp)"
+ ftp-host ftp-file))))
+ (setq kludge (prog1 (buffer-name kludge) (kill-buffer kludge)))
+ (rename-buffer kludge)
+ ;; ok, you can look again now.
+ (set-buffer-modified-p nil)
+ (ftp-setup-write-file-hooks)))
+ (if (and asynchronous
+ ;(waiting-for-user-input-p)
+ )
+ (progn (message "%s" msg)
+ (sleep-for 2))))))
+ ((memq (process-status process) '(exit signal))
+ (save-excursion
+ (set-buffer (process-buffer process))
+ (setq msg (format "Ftp died (buffer %s): %s"
+ (buffer-name (current-buffer))
+ msg))
+ (let ((buffer-read-only nil))
+ (goto-char (point-max))
+ (insert ?\n ?\n msg))
+ (delete-process proc)
+ (set-buffer (get-buffer-create "*ftp log*"))
+ (let ((buffer-read-only nil))
+ (goto-char (point-max))
+ (insert msg))
+ (if (waiting-for-user-input-p)
+ (error "%s" msg))))))
+
+(defun ftp-setup-write-file-hooks ()
+ (let ((hooks write-file-hooks))
+ (make-local-variable 'write-file-hooks)
+ (setq write-file-hooks (append write-file-hooks
+ '(ftp-write-file-hook))))
+ (make-local-variable 'revert-buffer-function)
+ (setq revert-buffer-function 'ftp-revert-buffer)
+ (setq default-directory "/tmp/")
+ (setq buffer-file-name (concat default-directory
+ (make-temp-name
+ (buffer-name (current-buffer)))))
+ (setq buffer-read-only nil))
+
+(defun ftp-write-file-hook ()
+ (let ((process (ftp-write-file ftp-host ftp-file)))
+ (set-process-sentinel process 'ftp-synchronous-output-sentinel)
+ (message "FTP writing %s:%s..." ftp-host ftp-file)
+ (while (eq (process-status process) 'run)
+ (condition-case ()
+ (accept-process-output process)
+ (error nil)))
+ (set-buffer-modified-p nil)
+ (message "FTP writing %s:%s...done" ftp-host ftp-file))
+ t)
+
+(defun ftp-revert-buffer (&rest ignore)
+ (let ((process (ftp-find-file ftp-host ftp-file)))
+ (set-process-sentinel process 'ftp-synchronous-input-sentinel)
+ (message "FTP reverting %s:%s" ftp-host ftp-file)
+ (while (eq (process-status process) 'run)
+ (condition-case ()
+ (accept-process-output process)
+ (error nil)))
+ (and (eq (process-status process) 'exit)
+ (= (process-exit-status process) 0)
+ (set-buffer-modified-p nil))
+ (message "Reverted")))