Forbid root user creation as it could lead to a system without any non-priviledged user accouts. Fixes: <https://issues.guix.gnu.org/54666>. * gnu/installer/newt/user.scm (run-user-add-page): Forbid it.
		
			
				
	
	
		
			291 lines
		
	
	
	
		
			12 KiB
		
	
	
	
		
			Scheme
		
	
	
	
	
	
			
		
		
	
	
			291 lines
		
	
	
	
		
			12 KiB
		
	
	
	
		
			Scheme
		
	
	
	
	
	
| ;;; GNU Guix --- Functional package management for GNU
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| ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
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| ;;; Copyright © 2019, 2020 Ludovic Courtès <ludo@gnu.org>
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| ;;; Copyright © 2019 Tobias Geerinckx-Rice <me@tobias.gr>
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| ;;;
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| ;;; This file is part of GNU Guix.
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| ;;;
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| ;;; GNU Guix is free software; you can redistribute it and/or modify it
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| ;;; 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 (at
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| ;;; your option) any later version.
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| ;;;
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| ;;; GNU Guix is distributed in the hope that it will be useful, but
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| ;;; 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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| ;;;
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| ;;; You should have received a copy of the GNU General Public License
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| ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
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| 
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| (define-module (gnu installer newt user)
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|   #:use-module (gnu installer user)
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|   #:use-module (gnu installer newt page)
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|   #:use-module (gnu installer newt utils)
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|   #:use-module (gnu installer utils)
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|   #:use-module (guix i18n)
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|   #:use-module (newt)
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|   #:use-module (ice-9 match)
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|   #:use-module (ice-9 receive)
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|   #:use-module (srfi srfi-1)
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|   #:use-module (srfi srfi-26)
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|   #:use-module (srfi srfi-34)
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|   #:use-module (srfi srfi-35)
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|   #:export (run-user-page))
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| 
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| (define* (run-user-add-page #:key (name "") (real-name "")
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|                             (home-directory ""))
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|   "Run a form to enter the user name, home directory, and password.  Use NAME,
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| REAL-NAME, and HOME-DIRECTORY as the initial values in the form."
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|   (define (pad-label label)
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|     (string-pad-right label 25))
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| 
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|   (define (root-account? name)
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|     (string=? name "root"))
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| 
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|   (let* ((label-name
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|           (make-label -1 -1 (pad-label (G_ "Name"))))
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|          (label-real-name
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|           (make-label -1 -1 (pad-label (G_ "Real name"))))
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|          (label-home-directory
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|           (make-label -1 -1 (pad-label (G_ "Home directory"))))
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|          (label-password
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|           (make-label -1 -1 (pad-label (G_ "Password"))))
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|          (entry-width 35)
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|          (entry-name (make-entry -1 -1 entry-width
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|                                  #:initial-value name))
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|          (entry-real-name (make-entry -1 -1 entry-width
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|                                       #:initial-value real-name))
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|          (entry-home-directory (make-entry -1 -1 entry-width
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|                                            #:initial-value home-directory))
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|          (password-visible-cb
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|           (make-checkbox -1 -1 (G_ "Show") #\space "x "))
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|          (entry-password (make-entry -1 -1 entry-width
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|                                      #:flags (logior FLAG-PASSWORD
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|                                                      FLAG-SCROLL)))
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|          (entry-grid (make-grid 3 5))
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|          (button-grid (make-grid 1 1))
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|          (ok-button (make-button -1 -1 (G_ "OK")))
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|          (grid (make-grid 1 2))
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|          (title (G_ "User creation"))
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|          (set-entry-grid-field
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|           (cut set-grid-field entry-grid <> <> GRID-ELEMENT-COMPONENT <>))
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|          (form (make-form)))
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| 
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|     (set-entry-grid-field 0 0 label-name)
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|     (set-entry-grid-field 1 0 entry-name)
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|     (set-entry-grid-field 0 1 label-real-name)
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|     (set-entry-grid-field 1 1 entry-real-name)
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|     (set-entry-grid-field 0 2 label-home-directory)
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|     (set-entry-grid-field 1 2 entry-home-directory)
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|     (set-entry-grid-field 0 3 label-password)
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|     (set-entry-grid-field 1 3 entry-password)
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| 
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|     (set-grid-field entry-grid
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|                     2 3
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|                     GRID-ELEMENT-COMPONENT
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|                     password-visible-cb
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|                     #:pad-left 1)
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| 
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|     (set-grid-field button-grid 0 0 GRID-ELEMENT-COMPONENT ok-button)
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| 
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|     (add-component-callback
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|      entry-name
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|      (lambda ()
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|        (set-entry-text entry-home-directory
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|                        (string-append "/home/" (entry-value entry-name)))
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| 
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|        (when (string-null? (entry-value entry-real-name))
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|          (set-entry-text entry-real-name
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|                          (string-titlecase (entry-value entry-name))))))
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| 
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|     (add-component-callback
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|      password-visible-cb
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|      (lambda ()
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|        (set-entry-flags entry-password
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|                         FLAG-PASSWORD
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|                         FLAG-ROLE-TOGGLE)))
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| 
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|     (add-components-to-form form
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|                             label-name label-real-name
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|                             label-home-directory label-password
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|                             entry-name entry-real-name
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|                             entry-home-directory entry-password
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|                             password-visible-cb
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|                             ok-button)
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| 
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|     (make-wrapped-grid-window (vertically-stacked-grid
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|                                GRID-ELEMENT-SUBGRID entry-grid
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|                                GRID-ELEMENT-SUBGRID button-grid)
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|                               title)
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| 
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|     (let ((error-empty-field-page
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|            (lambda ()
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|              (run-error-page (G_ "Empty inputs are not allowed.")
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|                              (G_ "Empty input"))))
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|           (error-root-page
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|            (lambda ()
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|              (run-error-page (G_ "Root account is automatically created.")
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|                              (G_ "Root account")))))
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|       (receive (exit-reason argument)
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|           (run-form form)
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|         (dynamic-wind
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|           (const #t)
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|           (lambda ()
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|             (when (eq? exit-reason 'exit-component)
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|               (cond
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|                ((components=? argument ok-button)
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|                 (let ((name           (entry-value entry-name))
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|                       (real-name      (entry-value entry-real-name))
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|                       (home-directory (entry-value entry-home-directory))
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|                       (password       (entry-value entry-password)))
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|                   (cond
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|                    ;; Empty field.
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|                    ((or (string=? name "")
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|                         (string=? home-directory ""))
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|                     (error-empty-field-page)
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|                     (run-user-add-page))
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|                    ;; Reject root account.
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|                    ((root-account? name)
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|                     (error-root-page)
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|                     (run-user-add-page))
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|                    (else
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|                     (let ((password (confirm-password password)))
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|                       (if password
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|                           (user
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|                            (name name)
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|                            (real-name real-name)
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|                            (home-directory home-directory)
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|                            (password (make-secret password)))
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|                           (run-user-add-page #:name name
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|                                              #:real-name real-name
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|                                              #:home-directory
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|                                              home-directory))))))))))
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|           (lambda ()
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|             (destroy-form-and-pop form)))))))
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| 
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| (define* (confirm-password password #:optional (try-again (const #f)))
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|   "Ask the user to confirm PASSWORD, a possibly empty string.  Call TRY-AGAIN,
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| a thunk, if the confirmation doesn't match PASSWORD, and return its result."
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|   (define confirmation
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|     (run-input-page (G_ "Please confirm the password.")
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|                     (G_ "Password confirmation required")
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|                     #:allow-empty-input? #t
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|                     #:input-visibility-checkbox? #t))
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| 
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|   (if (string=? password confirmation)
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|       password
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|       (begin
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|         (run-error-page
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|          (G_ "Password mismatch, please try again.")
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|          (G_ "Password error"))
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|         (try-again))))
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| 
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| (define (run-root-password-page)
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|   (define password
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|     ;; TRANSLATORS: Leave "root" untranslated: it refers to the name of the
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|     ;; system administrator account.
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|     (run-input-page (G_ "Please choose a password for the system \
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| administrator (\"root\").")
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|                     (G_ "System administrator password")
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|                     #:input-visibility-checkbox? #t))
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| 
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|   (confirm-password password run-root-password-page))
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| 
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| (define (run-user-page)
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|   (define (run users)
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|     (let* ((listbox (make-listbox
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|                      -1 -1 10
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|                      (logior FLAG-SCROLL FLAG-BORDER)))
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|            (info-textbox
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|             (make-reflowed-textbox
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|              -1 -1
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|              (G_ "Please add at least one user to system\
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|  using the 'Add' button.")
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|              40 #:flags FLAG-BORDER))
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|            (add-button (make-compact-button -1 -1 (G_ "Add")))
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|            (del-button (make-compact-button -1 -1 (G_ "Delete")))
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|            (listbox-button-grid
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|             (apply
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|              vertically-stacked-grid
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|              GRID-ELEMENT-COMPONENT add-button
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|              `(,@(if (null? users)
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|                      '()
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|                      (list GRID-ELEMENT-COMPONENT del-button)))))
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|            (ok-button (make-button -1 -1 (G_ "OK")))
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|            (exit-button (make-button -1 -1 (G_ "Exit")))
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|            (title (G_ "User creation"))
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|            (grid
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|             (vertically-stacked-grid
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|              GRID-ELEMENT-COMPONENT info-textbox
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|              GRID-ELEMENT-SUBGRID (horizontal-stacked-grid
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|                                    GRID-ELEMENT-COMPONENT listbox
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|                                    GRID-ELEMENT-SUBGRID listbox-button-grid)
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|              GRID-ELEMENT-SUBGRID (horizontal-stacked-grid
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|                                    GRID-ELEMENT-COMPONENT ok-button
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|                                    GRID-ELEMENT-COMPONENT exit-button)))
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|            (sorted-users (sort users (lambda (a b)
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|                                        (string<= (user-name a)
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|                                                  (user-name b)))))
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|            (listbox-elements
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|             (map
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|              (lambda (user)
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|                `((key . ,(append-entry-to-listbox listbox
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|                                                   (user-name user)))
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|                  (user . ,user)))
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|              sorted-users))
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|            (form (make-form)))
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| 
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| 
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|       (add-form-to-grid grid form #t)
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|       (make-wrapped-grid-window grid title)
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|       (if (null? users)
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|           (set-current-component form add-button)
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|           (set-current-component form ok-button))
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| 
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|       (receive (exit-reason argument)
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|           (run-form-with-clients form '(add-users))
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|         (dynamic-wind
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|           (const #t)
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|           (lambda ()
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|             (match exit-reason
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|               ('exit-component
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|                (cond
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|                 ((components=? argument add-button)
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|                  (run (cons (run-user-add-page) users)))
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|                 ((components=? argument del-button)
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|                  (let* ((current-user-key (current-listbox-entry listbox))
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|                         (users
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|                          (map (cut assoc-ref <> 'user)
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|                               (remove (lambda (element)
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|                                         (equal? (assoc-ref element 'key)
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|                                                 current-user-key))
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|                                       listbox-elements))))
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|                    (run users)))
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|                 ((components=? argument ok-button)
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|                  (when (null? users)
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|                    (run-error-page (G_ "Please create at least one user.")
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|                                    (G_ "No user"))
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|                    (run users))
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|                  (reverse users))
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|                 ((components=? argument exit-button)
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|                  (abort-to-prompt 'installer-step 'abort))))
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|               ('exit-fd-ready
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|                ;; Read the complete user list at once.
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|                (match argument
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|                  ((('user ('name names) ('real-name real-names)
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|                           ('home-directory homes) ('password passwords))
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|                    ..1)
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|                   (map (lambda (name real-name home password)
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|                          (user (name name) (real-name real-name)
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|                                (home-directory home)
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|                                (password (make-secret password))))
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|                        names real-names homes passwords))))))
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|           (lambda ()
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|             (destroy-form-and-pop form))))))
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| 
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|   ;; Add a "root" user simply to convey the root password.
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|   (cons (user (name "root")
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|               (home-directory "/root")
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|               (password (make-secret (run-root-password-page))))
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|         (run '())))
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