485 lines
18 KiB
Scheme
485 lines
18 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 (gnu packages base)
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#:use-module (gnu packages bash)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages package-management)
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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 (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-services
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operating-system-user-services
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operating-system-packages
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operating-system-bootloader-entries
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operating-system-host-name
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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-packages
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operating-system-timezone
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operating-system-locale
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operating-system-file-systems
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operating-system-derivation
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operating-system-profile
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<file-system>
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file-system
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file-system?
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file-system-device
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file-system-mount-point
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file-system-type
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file-system-needed-for-boot?
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file-system-flags
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file-system-options))
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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 ; package
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(default grub))
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(bootloader-entries operating-system-bootloader-entries ; list
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(default '()))
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(initrd operating-system-initrd ; (list fs) -> M derivation
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(default qemu-initrd))
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(host-name operating-system-host-name) ; string
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(file-systems operating-system-file-systems ; list of fs
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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 (list (user-group
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(name "root")
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(id 0)))))
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(skeletons operating-system-skeletons ; list of name/monadic value
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(default (default-skeletons)))
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(packages operating-system-packages ; list of (PACKAGE OUTPUT...)
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(default (list coreutils ; or just PACKAGE
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grep
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sed
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findutils
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guile
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bash
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(@ (gnu packages dmd) dmd)
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guix
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tzdata)))
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(timezone operating-system-timezone) ; string
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(locale operating-system-locale) ; string
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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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;; File system declaration.
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(define-record-type* <file-system> file-system
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make-file-system
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file-system?
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(device file-system-device) ; string
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(mount-point file-system-mount-point) ; string
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(type file-system-type) ; string
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(flags file-system-flags ; list of symbols
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(default '()))
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(options file-system-options ; string or #f
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(default #f))
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(needed-for-boot? file-system-needed-for-boot? ; Boolean
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(default #f))
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(check? file-system-check? ; Boolean
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(default #t)))
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;;;
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;;; Derivation.
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;;;
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(define* (union inputs
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#:key (guile (%guile-for-build)) (system (%current-system))
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(name "union"))
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"Return a derivation that builds the union of INPUTS. INPUTS is a list of
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input tuples."
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(define builder
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#~(begin
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(use-modules (guix build union))
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(define inputs '#$inputs)
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(setvbuf (current-output-port) _IOLBF)
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(setvbuf (current-error-port) _IOLBF)
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(format #t "building union `~a' with ~a packages...~%"
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#$output (length inputs))
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(union-build #$output inputs)))
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(gexp->derivation name builder
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#:system system
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#:modules '((guix build union))
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#:guile-for-build guile
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#:local-build? #t))
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(define* (file-union name files)
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"Return a derivation that builds a directory containing all of FILES. Each
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item in FILES must be a list where the first element is the file name to use
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in the new directory, and the second element is a gexp denoting the target
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file."
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(define builder
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#~(begin
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(mkdir #$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 (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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(sequence %store-monad
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(map (match-lambda
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(($ <file-system> device target type flags opts #f check?)
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(file-system-service device target type
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#:check? check?
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#:options opts)))
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file-systems)))
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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 ((root-fs (root-file-system-service))
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(other-fs (other-file-system-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 other-fs))))
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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* (etc-directory #:key
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(locale "C") (timezone "Europe/Paris")
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(skeletons '())
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(pam-services '())
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(profile "/var/run/current-system/profile")
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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/bin/sh
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/run/current-system/bin/bash\n"))
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(issue (text-file "issue" "
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This is an alpha preview of the GNU system. Welcome.
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This image features the GNU Guix package manager, which was used to
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build it (http://www.gnu.org/software/guix/). The init system is
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GNU dmd (http://www.gnu.org/software/dmd/).
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You can log in as 'guest' or 'root' with no password.
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"))
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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\\$ '
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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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export PATH=$HOME/.guix-profile/bin:" profile "/bin:" profile "/sbin
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export PATH=/run/setuid-programs:$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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("skel" ,#~#$skel)
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("shells" ,#~#$shells)
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("profile" ,#~#$bashrc)
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("localtime" ,#~(string-append #$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 default profile of OS."
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;; TODO: Replace with a real profile with a manifest.
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(union (operating-system-packages os)
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#:name "default-profile"))
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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-directory #:pam-services pam-services
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#:skeletons skeletons
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#:locale (operating-system-locale os)
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#:timezone (operating-system-timezone os)
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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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(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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#$(user-group-id group)))
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(define (user-account->gexp account)
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"Turn ACCOUNT, a <user-account> object, into a list-valued gexp suitable for
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'activate-users'."
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#~`(#$(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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(define (operating-system-boot-script os)
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"Return the boot script for OS---i.e., the code started by the initrd once
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we're running in the final root."
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(define %modules
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'((guix build activation)
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(guix build utils)))
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(mlet* %store-monad ((services (operating-system-services os))
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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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(dmd-conf (dmd-configuration-file services))
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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 "boot"
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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
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(cons #$compiled %load-compiled-path)))
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(use-modules (guix build activation))
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;; Populate /etc.
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(activate-etc #$etc)
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;; Add users and user groups.
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(setenv "PATH"
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(string-append #$(@ (gnu packages admin) shadow)
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"/sbin"))
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(activate-users+groups (list #$@user-specs)
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(list #$@group-specs))
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;; Activate setuid programs.
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(activate-setuid-programs (list #$@setuid-progs))
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;; Close any remaining open file descriptors to be on the
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;; safe side. This must be the very last thing we do,
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;; because Guile has internal FDs such as 'sleep_pipe'
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;; that need to be alive.
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(let loop ((fd 3))
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(when (< fd 1024)
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(false-if-exception (close-fdes fd))
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(loop (+ 1 fd))))
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;; Start dmd.
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(execl (string-append #$dmd "/bin/dmd")
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"dmd" "--config" #$dmd-conf)))))
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(define (operating-system-root-file-system os)
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"Return the root file system of OS."
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(find (match-lambda
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(($ <file-system> _ "/") #t)
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(_ #f))
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(operating-system-file-systems os)))
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(define (operating-system-derivation os)
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"Return a derivation that builds OS."
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(define boot-file-systems
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(filter (match-lambda
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(($ <file-system> device "/")
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#t)
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(($ <file-system> device mount-point type flags options boot?)
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boot?))
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(operating-system-file-systems os)))
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(mlet* %store-monad
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((profile (operating-system-profile os))
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(etc (operating-system-etc-directory os))
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(services (operating-system-services os))
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(boot (operating-system-boot-script os))
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(kernel -> (operating-system-kernel os))
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(initrd ((operating-system-initrd os) boot-file-systems))
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(initrd-file -> #~(string-append #$initrd "/initrd"))
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(root-fs -> (operating-system-root-file-system os))
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(entries -> (list (menu-entry
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(label (string-append
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"GNU system with "
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(package-full-name kernel)
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" (technology preview)"))
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(linux kernel)
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(linux-arguments
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(list (string-append "--root="
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(file-system-device root-fs))
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#~(string-append "--load=" #$boot)))
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(initrd initrd-file))))
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(grub.cfg (grub-configuration-file entries)))
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(file-union "system"
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`(("boot" ,#~#$boot)
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("kernel" ,#~#$kernel)
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("initrd" ,initrd-file)
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("profile" ,#~#$profile)
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("grub.cfg" ,#~#$grub.cfg)
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("etc" ,#~#$etc)))))
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;;; system.scm ends here
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