2a13d05e45
* gnu/services/base.scm (swap-service): New procedure. * gnu/system.scm (<operating-system>)[swap-devices]: New field. (swap-services): New procedure. (essential-services): Use it.
629 lines
24 KiB
Scheme
629 lines
24 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
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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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(define-module (gnu system)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix gexp)
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#:use-module (guix records)
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#:use-module (guix packages)
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#:use-module (guix derivations)
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#:use-module (guix profiles)
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#:use-module (gnu packages base)
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#:use-module (gnu packages bash)
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#:use-module (gnu packages guile)
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#:use-module (gnu packages which)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages linux)
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#:use-module (gnu packages package-management)
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#:use-module (gnu packages which)
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#:use-module (gnu packages less)
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#:use-module (gnu packages zile)
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#:use-module (gnu packages nano)
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#:use-module (gnu packages lsof)
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#:use-module (gnu packages gawk)
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#:use-module (gnu packages compression)
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#:autoload (gnu packages cryptsetup) (cryptsetup)
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#:use-module (gnu services)
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#:use-module (gnu services dmd)
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#:use-module (gnu services base)
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#:use-module (gnu system grub)
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#:use-module (gnu system shadow)
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#:use-module (gnu system linux)
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#:use-module (gnu system linux-initrd)
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#:use-module (gnu system file-systems)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:export (operating-system
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operating-system?
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operating-system-bootloader
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operating-system-services
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operating-system-user-services
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operating-system-packages
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operating-system-host-name
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operating-system-hosts-file
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operating-system-kernel
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operating-system-initrd
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operating-system-users
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operating-system-groups
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operating-system-issue
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operating-system-packages
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operating-system-timezone
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operating-system-locale
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operating-system-mapped-devices
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operating-system-file-systems
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operating-system-activation-script
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operating-system-derivation
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operating-system-profile
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operating-system-grub.cfg
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%setuid-programs
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%base-packages
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luks-device-mapping))
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;;; Commentary:
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;;;
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;;; This module supports whole-system configuration.
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;;;
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;;; Code:
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;; System-wide configuration.
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;; TODO: Add per-field docstrings/stexi.
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(define-record-type* <operating-system> operating-system
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make-operating-system
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operating-system?
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(kernel operating-system-kernel ; package
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(default linux-libre))
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(bootloader operating-system-bootloader) ; <grub-configuration>
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(initrd operating-system-initrd ; (list fs) -> M derivation
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(default base-initrd))
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(host-name operating-system-host-name) ; string
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(hosts-file operating-system-hosts-file ; M item | #f
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(default #f))
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(mapped-devices operating-system-mapped-devices ; list of <mapped-device>
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(default '()))
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(file-systems operating-system-file-systems) ; list of fs
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(swap-devices operating-system-swap-devices ; list of strings
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(default '()))
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(users operating-system-users ; list of user accounts
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(default '()))
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(groups operating-system-groups ; list of user groups
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(default %base-groups))
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(skeletons operating-system-skeletons ; list of name/monadic value
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(default (default-skeletons)))
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(issue operating-system-issue ; string
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(default %default-issue))
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(packages operating-system-packages ; list of (PACKAGE OUTPUT...)
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(default %base-packages)) ; or just PACKAGE
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(timezone operating-system-timezone) ; string
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(locale operating-system-locale ; string
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(default "en_US.UTF-8"))
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(services operating-system-user-services ; list of monadic services
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(default %base-services))
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(pam-services operating-system-pam-services ; list of PAM services
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(default (base-pam-services)))
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(setuid-programs operating-system-setuid-programs
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(default %setuid-programs)) ; list of string-valued gexps
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(sudoers operating-system-sudoers ; /etc/sudoers contents
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(default %sudoers-specification)))
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;;;
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;;; Derivation.
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;;;
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(define* (file-union name files)
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"Return a derivation that builds a directory containing all of FILES. Each
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item in FILES must be a list where the first element is the file name to use
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in the new directory, and the second element is a gexp denoting the target
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file."
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(define builder
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#~(begin
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(mkdir #$output)
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(chdir #$output)
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#$@(map (match-lambda
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((target source)
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#~(symlink #$source #$target)))
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files)))
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(gexp->derivation name builder))
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;;;
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;;; Services.
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;;;
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(define (open-luks-device source target)
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"Return a gexp that maps SOURCE to TARGET as a LUKS device, using
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'cryptsetup'."
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#~(zero? (system* (string-append #$cryptsetup "/sbin/cryptsetup")
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"open" "--type" "luks"
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#$source #$target)))
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(define (close-luks-device source target)
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"Return a gexp that closes TARGET, a LUKS device."
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#~(zero? (system* (string-append #$cryptsetup "/sbin/cryptsetup")
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"close" #$target)))
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(define luks-device-mapping
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;; The type of LUKS mapped devices.
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(mapped-device-kind
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(open open-luks-device)
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(close close-luks-device)))
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(define (other-file-system-services os)
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"Return file system services for the file systems of OS that are not marked
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as 'needed-for-boot'."
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(define file-systems
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(remove (lambda (fs)
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(or (file-system-needed-for-boot? fs)
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(string=? "/" (file-system-mount-point fs))))
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(operating-system-file-systems os)))
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(define (device-mappings fs)
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(filter (lambda (md)
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(string=? (string-append "/dev/mapper/"
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(mapped-device-target md))
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(file-system-device fs)))
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(operating-system-mapped-devices os)))
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(define (requirements fs)
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(map (lambda (md)
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(symbol-append 'device-mapping-
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(string->symbol (mapped-device-target md))))
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(device-mappings fs)))
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(sequence %store-monad
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(map (lambda (fs)
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(match fs
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(($ <file-system> device title target type flags opts
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#f check? create?)
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(file-system-service device target type
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#:title title
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#:requirements (requirements fs)
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#:check? check?
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#:create-mount-point? create?
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#:options opts
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#:flags flags))))
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file-systems)))
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(define (device-mapping-services os)
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"Return the list of device-mapping services for OS as a monadic list."
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(sequence %store-monad
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(map (lambda (md)
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(let* ((source (mapped-device-source md))
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(target (mapped-device-target md))
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(type (mapped-device-type md))
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(open (mapped-device-kind-open type))
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(close (mapped-device-kind-close type)))
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(device-mapping-service target
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(open source target)
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(close source target))))
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(operating-system-mapped-devices os))))
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(define (swap-services os)
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"Return the list of swap services for OS as a monadic list."
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(sequence %store-monad
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(map swap-service (operating-system-swap-devices os))))
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(define (essential-services os)
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"Return the list of essential services for OS. These are special services
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that implement part of what's declared in OS are responsible for low-level
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bookkeeping."
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(mlet* %store-monad ((mappings (device-mapping-services os))
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(root-fs (root-file-system-service))
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(other-fs (other-file-system-services os))
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(swaps (swap-services os))
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(procs (user-processes-service
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(map (compose first service-provision)
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other-fs)))
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(host-name (host-name-service
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(operating-system-host-name os))))
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(return (cons* host-name procs root-fs
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(append other-fs mappings swaps)))))
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(define (operating-system-services os)
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"Return all the services of OS, including \"internal\" services that do not
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explicitly appear in OS."
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(mlet %store-monad
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((user (sequence %store-monad (operating-system-user-services os)))
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(essential (essential-services os)))
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(return (append essential user))))
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;;;
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;;; /etc.
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;;;
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(define %base-packages
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;; Default set of packages globally visible. It should include anything
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;; required for basic administrator tasks.
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(cons* procps psmisc which less zile nano
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(@ (gnu packages admin) dmd) guix
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lsof ;for Guix's 'list-runtime-roots'
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util-linux inetutils isc-dhcp wireless-tools
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net-tools ; XXX: remove when Inetutils suffices
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;; Get 'insmod' & co. from kmod, not module-init-tools, since udev
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;; already depends on it anyway.
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kmod eudev
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e2fsprogs kbd
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;; The packages below are also in %FINAL-INPUTS, so take them from
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;; there to avoid duplication.
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(map canonical-package
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(list guile-2.0 bash coreutils findutils grep sed
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diffutils gawk tar gzip bzip2 xz lzip))))
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(define %default-issue
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;; Default contents for /etc/issue.
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"
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This is the GNU system. Welcome.\n")
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(define (default-/etc/hosts host-name)
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"Return the default /etc/hosts file."
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(text-file "hosts"
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(string-append "127.0.0.1 localhost " host-name "\n"
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"::1 localhost " host-name "\n")))
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(define* (etc-directory #:key
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(locale "C") (timezone "Europe/Paris")
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(issue "Hello!\n")
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(skeletons '())
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(pam-services '())
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(profile "/run/current-system/profile")
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hosts-file
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(sudoers ""))
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"Return a derivation that builds the static part of the /etc directory."
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(mlet* %store-monad
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((pam.d (pam-services->directory pam-services))
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(sudoers (text-file "sudoers" sudoers))
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(login.defs (text-file "login.defs" "# Empty for now.\n"))
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(shells (text-file "shells" ; used by xterm and others
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"\
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/bin/sh
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/run/current-system/profile/bin/sh
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/run/current-system/profile/bin/bash\n"))
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(issue (text-file "issue" issue))
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;; For now, generate a basic config so that /etc/hosts is honored.
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(nsswitch (text-file "nsswitch.conf"
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"hosts: files dns\n"))
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;; TODO: Generate bashrc from packages' search-paths.
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(bashrc (text-file* "bashrc" "
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export PS1='\\u@\\h \\w\\$ '
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export LC_ALL=\"" locale "\"
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export TZ=\"" timezone "\"
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export TZDIR=\"" tzdata "/share/zoneinfo\"
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# Tell 'modprobe' & co. where to look for modules.
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export LINUX_MODULE_DIRECTORY=/run/booted-system/kernel/lib/modules
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export PATH=$HOME/.guix-profile/bin:/run/current-system/profile/bin
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export PATH=/run/setuid-programs:/run/current-system/profile/sbin:$PATH
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export CPATH=$HOME/.guix-profile/include:" profile "/include
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export LIBRARY_PATH=$HOME/.guix-profile/lib:" profile "/lib
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alias ls='ls -p --color'
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alias ll='ls -l'
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"))
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(skel (skeleton-directory skeletons)))
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(file-union "etc"
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`(("services" ,#~(string-append #$net-base "/etc/services"))
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("protocols" ,#~(string-append #$net-base "/etc/protocols"))
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("rpc" ,#~(string-append #$net-base "/etc/rpc"))
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("pam.d" ,#~#$pam.d)
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("login.defs" ,#~#$login.defs)
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("issue" ,#~#$issue)
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("nsswitch.conf" ,#~#$nsswitch)
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("skel" ,#~#$skel)
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("shells" ,#~#$shells)
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("profile" ,#~#$bashrc)
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("hosts" ,#~#$hosts-file)
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("localtime" ,#~(string-append #$tzdata "/share/zoneinfo/"
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#$timezone))
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("sudoers" ,#~#$sudoers)))))
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(define (operating-system-profile os)
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"Return a derivation that builds the system profile of OS."
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(profile-derivation (manifest (map package->manifest-entry
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(operating-system-packages os)))))
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(define %root-account
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;; Default root account.
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(user-account
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(name "root")
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(password "")
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(uid 0) (group "root")
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(comment "System administrator")
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(home-directory "/root")))
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(define (operating-system-accounts os)
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"Return the user accounts for OS, including an obligatory 'root' account."
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(define users
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;; Make sure there's a root account.
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(if (find (lambda (user)
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(and=> (user-account-uid user) zero?))
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(operating-system-users os))
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(operating-system-users os)
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(cons %root-account (operating-system-users os))))
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(mlet %store-monad ((services (operating-system-services os)))
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(return (append users
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(append-map service-user-accounts services)))))
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(define (operating-system-etc-directory os)
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"Return that static part of the /etc directory of OS."
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(mlet* %store-monad
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((services (operating-system-services os))
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(pam-services ->
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;; Services known to PAM.
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(delete-duplicates
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(append (operating-system-pam-services os)
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(append-map service-pam-services services))))
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(profile-drv (operating-system-profile os))
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(skeletons (operating-system-skeletons os))
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(/etc/hosts (or (operating-system-hosts-file os)
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(default-/etc/hosts (operating-system-host-name os)))))
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(etc-directory #:pam-services pam-services
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#:skeletons skeletons
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#:issue (operating-system-issue os)
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#:locale (operating-system-locale os)
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#:timezone (operating-system-timezone os)
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#:hosts-file /etc/hosts
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#:sudoers (operating-system-sudoers os)
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#:profile profile-drv)))
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(define %setuid-programs
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;; Default set of setuid-root programs.
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(let ((shadow (@ (gnu packages admin) shadow)))
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(list #~(string-append #$shadow "/bin/passwd")
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#~(string-append #$shadow "/bin/su")
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#~(string-append #$inetutils "/bin/ping")
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#~(string-append #$sudo "/bin/sudo")
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#~(string-append #$fuse "/bin/fusermount"))))
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(define %sudoers-specification
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;; Default /etc/sudoers contents: 'root' and all members of the 'wheel'
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;; group can do anything. See
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;; <http://www.sudo.ws/sudo/man/1.8.10/sudoers.man.html>.
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;; TODO: Add a declarative API.
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"root ALL=(ALL) ALL
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%wheel ALL=(ALL) ALL\n")
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(define (user-group->gexp group)
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"Turn GROUP, a <user-group> object, into a list-valued gexp suitable for
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'active-groups'."
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#~(list #$(user-group-name group)
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#$(user-group-password group)
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#$(user-group-id group)
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#$(user-group-system? group)))
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(define (user-account->gexp account)
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"Turn ACCOUNT, a <user-account> object, into a list-valued gexp suitable for
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'activate-users'."
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#~`(#$(user-account-name account)
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#$(user-account-uid account)
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#$(user-account-group account)
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#$(user-account-supplementary-groups account)
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#$(user-account-comment account)
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#$(user-account-home-directory account)
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,#$(user-account-shell account) ; this one is a gexp
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#$(user-account-password account)
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#$(user-account-system? account)))
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(define (operating-system-activation-script os)
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"Return the activation script for OS---i.e., the code that \"activates\" the
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stateful part of OS, including user accounts and groups, special directories,
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etc."
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(define %modules
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'((gnu build activation)
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(gnu build linux-boot)
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(gnu build file-systems)
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(guix build utils)))
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(define (service-activations services)
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;; Return the activation scripts for SERVICES.
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(let ((gexps (filter-map service-activate services)))
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(sequence %store-monad (map (cut gexp->file "activate-service.scm" <>)
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gexps))))
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(mlet* %store-monad ((services (operating-system-services os))
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(actions (service-activations services))
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(etc (operating-system-etc-directory os))
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(modules (imported-modules %modules))
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(compiled (compiled-modules %modules))
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(accounts (operating-system-accounts os)))
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(define setuid-progs
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(operating-system-setuid-programs os))
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(define user-specs
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(map user-account->gexp accounts))
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(define groups
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(append (operating-system-groups os)
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(append-map service-user-groups services)))
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(define group-specs
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(map user-group->gexp groups))
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(gexp->file "activate"
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#~(begin
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(eval-when (expand load eval)
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;; Make sure 'use-modules' below succeeds.
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(set! %load-path (cons #$modules %load-path))
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(set! %load-compiled-path
|
||
(cons #$compiled %load-compiled-path)))
|
||
|
||
(use-modules (gnu build activation))
|
||
|
||
;; Make sure /bin/sh is valid and current.
|
||
(activate-/bin/sh
|
||
(string-append #$(canonical-package bash)
|
||
"/bin/sh"))
|
||
|
||
;; Populate /etc.
|
||
(activate-etc #$etc)
|
||
|
||
;; Add users and user groups.
|
||
(setenv "PATH"
|
||
(string-append #$(@ (gnu packages admin) shadow)
|
||
"/sbin"))
|
||
(activate-users+groups (list #$@user-specs)
|
||
(list #$@group-specs))
|
||
|
||
;; Activate setuid programs.
|
||
(activate-setuid-programs (list #$@setuid-progs))
|
||
|
||
;; Run the services' activation snippets.
|
||
;; TODO: Use 'load-compiled'.
|
||
(for-each primitive-load '#$actions)
|
||
|
||
;; Set up /run/current-system.
|
||
(activate-current-system)))))
|
||
|
||
(define (operating-system-boot-script os)
|
||
"Return the boot script for OS---i.e., the code started by the initrd once
|
||
we're running in the final root."
|
||
(mlet* %store-monad ((services (operating-system-services os))
|
||
(activate (operating-system-activation-script os))
|
||
(dmd-conf (dmd-configuration-file services)))
|
||
(gexp->file "boot"
|
||
#~(begin
|
||
;; Activate the system.
|
||
;; TODO: Use 'load-compiled'.
|
||
(primitive-load #$activate)
|
||
|
||
;; Keep track of the booted system.
|
||
(false-if-exception (delete-file "/run/booted-system"))
|
||
(symlink (readlink "/run/current-system")
|
||
"/run/booted-system")
|
||
|
||
;; Close any remaining open file descriptors to be on the
|
||
;; safe side. This must be the very last thing we do,
|
||
;; because Guile has internal FDs such as 'sleep_pipe'
|
||
;; that need to be alive.
|
||
(let loop ((fd 3))
|
||
(when (< fd 1024)
|
||
(false-if-exception (close-fdes fd))
|
||
(loop (+ 1 fd))))
|
||
|
||
;; Start dmd.
|
||
(execl (string-append #$dmd "/bin/dmd")
|
||
"dmd" "--config" #$dmd-conf)))))
|
||
|
||
(define (operating-system-root-file-system os)
|
||
"Return the root file system of OS."
|
||
(find (match-lambda
|
||
(($ <file-system> _ _ "/") #t)
|
||
(_ #f))
|
||
(operating-system-file-systems os)))
|
||
|
||
(define (operating-system-initrd-file os)
|
||
"Return a gexp denoting the initrd file of OS."
|
||
(define boot-file-systems
|
||
(filter (match-lambda
|
||
(($ <file-system> device title "/")
|
||
#t)
|
||
(($ <file-system> device title mount-point type flags
|
||
options boot?)
|
||
boot?))
|
||
(operating-system-file-systems os)))
|
||
|
||
;; TODO: Pass the mapped devices required by boot-time file systems to the
|
||
;; initrd.
|
||
(mlet %store-monad
|
||
((initrd ((operating-system-initrd os) boot-file-systems)))
|
||
(return #~(string-append #$initrd "/initrd"))))
|
||
|
||
(define (kernel->grub-label kernel)
|
||
"Return a label for the GRUB menu entry that boots KERNEL."
|
||
(string-append "GNU system with "
|
||
(string-titlecase (package-name kernel)) " "
|
||
(package-version kernel)
|
||
" (technology preview)"))
|
||
|
||
(define* (operating-system-grub.cfg os #:optional (old-entries '()))
|
||
"Return the GRUB configuration file for OS. Use OLD-ENTRIES to populate the
|
||
\"old entries\" menu."
|
||
(mlet* %store-monad
|
||
((system (operating-system-derivation os))
|
||
(root-fs -> (operating-system-root-file-system os))
|
||
(kernel -> (operating-system-kernel os))
|
||
(entries -> (list (menu-entry
|
||
(label (kernel->grub-label kernel))
|
||
(linux kernel)
|
||
(linux-arguments
|
||
(list (string-append "--root="
|
||
(file-system-device root-fs))
|
||
#~(string-append "--system=" #$system)
|
||
#~(string-append "--load=" #$system
|
||
"/boot")))
|
||
(initrd #~(string-append #$system "/initrd"))))))
|
||
(grub-configuration-file (operating-system-bootloader os) entries
|
||
#:old-entries old-entries)))
|
||
|
||
(define (operating-system-parameters-file os)
|
||
"Return a file that describes the boot parameters of OS. The primary use of
|
||
this file is the reconstruction of GRUB menu entries for old configurations."
|
||
(mlet %store-monad ((initrd (operating-system-initrd-file os))
|
||
(root -> (operating-system-root-file-system os))
|
||
(label -> (kernel->grub-label
|
||
(operating-system-kernel os))))
|
||
(gexp->file "parameters"
|
||
#~(boot-parameters (version 0)
|
||
(label #$label)
|
||
(root-device #$(file-system-device root))
|
||
(kernel #$(operating-system-kernel os))
|
||
(initrd #$initrd)))))
|
||
|
||
(define (operating-system-derivation os)
|
||
"Return a derivation that builds OS."
|
||
(mlet* %store-monad
|
||
((profile (operating-system-profile os))
|
||
(etc (operating-system-etc-directory os))
|
||
(boot (operating-system-boot-script os))
|
||
(kernel -> (operating-system-kernel os))
|
||
(initrd (operating-system-initrd-file os))
|
||
(params (operating-system-parameters-file os)))
|
||
(file-union "system"
|
||
`(("boot" ,#~#$boot)
|
||
("kernel" ,#~#$kernel)
|
||
("parameters" ,#~#$params)
|
||
("initrd" ,initrd)
|
||
("profile" ,#~#$profile)
|
||
("etc" ,#~#$etc)))))
|
||
|
||
;;; system.scm ends here
|