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227 lines
7.1 KiB
EmacsLisp
227 lines
7.1 KiB
EmacsLisp
;;; netrc.el --- .netrc parsing functionality
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;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; Keywords: news
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;; Modularized by Ted Zlatanov <tzz@lifelogs.com>
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;; when it was part of Gnus.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Just the .netrc parsing functionality, abstracted so other packages
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;; besides Gnus can use it.
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;;; Code:
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;;;
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;;; .netrc and .authinfo rc parsing
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;;;
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;; use encrypt if loaded (encrypt-file-alist has to be set as well)
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(autoload 'encrypt-find-model "encrypt")
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(autoload 'encrypt-insert-file-contents "encrypt")
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(defalias 'netrc-point-at-eol
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(if (fboundp 'point-at-eol)
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'point-at-eol
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'line-end-position))
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(defvar encrypt-file-alist)
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(eval-when-compile
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;; This is unnecessary in the compiled version as it is a macro.
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(if (fboundp 'bound-and-true-p)
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(defalias 'netrc-bound-and-true-p 'bound-and-true-p)
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(defmacro netrc-bound-and-true-p (var)
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"Return the value of symbol VAR if it is bound, else nil."
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`(and (boundp (quote ,var)) ,var))))
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(defgroup netrc nil
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"Netrc configuration."
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:group 'comm)
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(defvar netrc-services-file "/etc/services"
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"The name of the services file.")
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(defun netrc-parse (file)
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(interactive "fFile to Parse: ")
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"Parse FILE and return a list of all entries in the file."
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(if (listp file)
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file
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(when (file-exists-p file)
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(with-temp-buffer
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(let ((tokens '("machine" "default" "login"
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"password" "account" "macdef" "force"
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"port"))
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(encryption-model (when (netrc-bound-and-true-p encrypt-file-alist)
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(encrypt-find-model file)))
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alist elem result pair)
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(if encryption-model
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(encrypt-insert-file-contents file encryption-model)
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(insert-file-contents file))
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(goto-char (point-min))
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;; Go through the file, line by line.
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(while (not (eobp))
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(narrow-to-region (point) (point-at-eol))
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;; For each line, get the tokens and values.
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(while (not (eobp))
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(skip-chars-forward "\t ")
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;; Skip lines that begin with a "#".
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(if (eq (char-after) ?#)
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(goto-char (point-max))
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(unless (eobp)
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(setq elem
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(if (= (following-char) ?\")
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(read (current-buffer))
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(buffer-substring
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(point) (progn (skip-chars-forward "^\t ")
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(point)))))
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(cond
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((equal elem "macdef")
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;; We skip past the macro definition.
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(widen)
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(while (and (zerop (forward-line 1))
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(looking-at "$")))
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(narrow-to-region (point) (point)))
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((member elem tokens)
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;; Tokens that don't have a following value are ignored,
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;; except "default".
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(when (and pair (or (cdr pair)
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(equal (car pair) "default")))
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(push pair alist))
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(setq pair (list elem)))
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(t
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;; Values that haven't got a preceding token are ignored.
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(when pair
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(setcdr pair elem)
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(push pair alist)
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(setq pair nil)))))))
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(when alist
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(push (nreverse alist) result))
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(setq alist nil
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pair nil)
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(widen)
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(forward-line 1))
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(nreverse result))))))
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(defun netrc-machine (list machine &optional port defaultport)
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"Return the netrc values from LIST for MACHINE or for the default entry.
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If PORT specified, only return entries with matching port tokens.
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Entries without port tokens default to DEFAULTPORT."
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(let ((rest list)
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result)
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(while list
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(when (equal (cdr (assoc "machine" (car list))) machine)
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(push (car list) result))
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(pop list))
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(unless result
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;; No machine name matches, so we look for default entries.
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(while rest
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(when (assoc "default" (car rest))
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(push (car rest) result))
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(pop rest)))
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(when result
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(setq result (nreverse result))
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(while (and result
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(not (netrc-port-equal
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(or port defaultport "nntp")
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;; when port is not given in the netrc file,
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;; it should mean "any port"
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(or (netrc-get (car result) "port")
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defaultport port))))
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(pop result))
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(car result))))
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(defun netrc-machine-user-or-password (mode authinfo-file-or-list machines ports defaults)
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"Get the user name or password according to MODE from AUTHINFO-FILE-OR-LIST.
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Matches a machine from MACHINES and a port from PORTS, giving
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default ports DEFAULTS to `netrc-machine'.
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MODE can be \"login\" or \"password\", suitable for passing to
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`netrc-get'."
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(let ((authinfo-list (if (stringp authinfo-file-or-list)
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(netrc-parse authinfo-file-or-list)
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authinfo-file-or-list))
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(ports (or ports '(nil)))
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(defaults (or defaults '(nil)))
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info)
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(if (listp mode)
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(setq info
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(mapcar
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(lambda (mode-element)
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(netrc-machine-user-or-password
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mode-element
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authinfo-list
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machines
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ports
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defaults))
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mode))
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(dolist (machine machines)
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(dolist (default defaults)
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(dolist (port ports)
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(let ((alist (netrc-machine authinfo-list machine port default)))
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(setq info (or (netrc-get alist mode) info)))))))
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info))
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(defun netrc-get (alist type)
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"Return the value of token TYPE from ALIST."
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(cdr (assoc type alist)))
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(defun netrc-port-equal (port1 port2)
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(when (numberp port1)
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(setq port1 (or (netrc-find-service-name port1) port1)))
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(when (numberp port2)
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(setq port2 (or (netrc-find-service-name port2) port2)))
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(equal port1 port2))
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(defun netrc-parse-services ()
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(when (file-exists-p netrc-services-file)
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(let ((services nil))
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(with-temp-buffer
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(insert-file-contents netrc-services-file)
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(while (search-forward "#" nil t)
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(delete-region (1- (point)) (point-at-eol)))
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(goto-char (point-min))
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(while (re-search-forward
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"^ *\\([^ \n\t]+\\)[ \t]+\\([0-9]+\\)/\\([^ \t\n]+\\)" nil t)
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(push (list (match-string 1) (string-to-number (match-string 2))
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(intern (downcase (match-string 3))))
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services))
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(nreverse services)))))
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(defun netrc-find-service-name (number &optional type)
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(let ((services (netrc-parse-services))
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service)
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(setq type (or type 'tcp))
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(while (and (setq service (pop services))
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(not (and (= number (cadr service))
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(eq type (car (cddr service)))))))
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(car service)))
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(defun netrc-find-service-number (name &optional type)
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(let ((services (netrc-parse-services))
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service)
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(setq type (or type 'tcp))
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(while (and (setq service (pop services))
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(not (and (string= name (car service))
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(eq type (car (cddr service)))))))
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(cadr service)))
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(provide 'netrc)
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;; arch-tag: af9929cc-2d12-482f-936e-eb4366f9fa55
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;;; netrc.el ends here
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