;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès ;;; Copyright © 2015 Mark H Weaver ;;; Copyright © 2015, 2016 Alex Kost ;;; Copyright © 2016 Chris Marusich ;;; Copyright © 2017 Mathieu Othacehe ;;; ;;; This file is part of GNU Guix. ;;; ;;; GNU Guix is free software; you can redistribute it and/or modify it ;;; under the terms of the GNU General Public License as published by ;;; the Free Software Foundation; either version 3 of the License, or (at ;;; your option) any later version. ;;; ;;; GNU Guix is distributed in the hope that it will be useful, but ;;; WITHOUT ANY WARRANTY; without even the implied warranty of ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;;; GNU General Public License for more details. ;;; ;;; You should have received a copy of the GNU General Public License ;;; along with GNU Guix. If not, see . (define-module (gnu system) #:use-module (guix store) #:use-module (guix monads) #:use-module (guix gexp) #:use-module (guix records) #:use-module (guix packages) #:use-module (guix derivations) #:use-module (guix profiles) #:use-module (guix ui) #:use-module (gnu packages base) #:use-module (gnu packages bash) #:use-module (gnu packages guile) #:use-module (gnu packages admin) #:use-module (gnu packages linux) #:use-module (gnu packages pciutils) #:use-module (gnu packages package-management) #:use-module (gnu packages less) #:use-module (gnu packages zile) #:use-module (gnu packages nano) #:use-module (gnu packages lsof) #:use-module (gnu packages gawk) #:use-module (gnu packages man) #:use-module (gnu packages texinfo) #:use-module (gnu packages compression) #:use-module (gnu packages firmware) #:use-module (gnu services) #:use-module (gnu services shepherd) #:use-module (gnu services base) #:use-module (gnu system grub) #:use-module (gnu system shadow) #:use-module (gnu system nss) #:use-module (gnu system locale) #:use-module (gnu system pam) #:use-module (gnu system linux-initrd) #:use-module (gnu system file-systems) #:use-module (gnu system mapped-devices) #:use-module (ice-9 match) #:use-module (srfi srfi-1) #:use-module (srfi srfi-26) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) #:use-module (rnrs bytevectors) #:export (operating-system operating-system? operating-system-bootloader operating-system-services operating-system-user-services operating-system-packages operating-system-host-name operating-system-hosts-file operating-system-kernel operating-system-kernel-file operating-system-kernel-arguments operating-system-initrd operating-system-users operating-system-groups operating-system-issue operating-system-timezone operating-system-locale operating-system-locale-definitions operating-system-locale-libcs operating-system-mapped-devices operating-system-file-systems operating-system-store-file-system operating-system-user-mapped-devices operating-system-boot-mapped-devices operating-system-activation-script operating-system-user-accounts operating-system-shepherd-service-names operating-system-derivation operating-system-profile operating-system-bootcfg operating-system-etc-directory operating-system-locale-directory operating-system-boot-script system-linux-image-file-name boot-parameters boot-parameters? boot-parameters-label boot-parameters-root-device boot-parameters-store-device boot-parameters-store-mount-point boot-parameters-kernel boot-parameters-kernel-arguments boot-parameters-initrd read-boot-parameters-file local-host-aliases %setuid-programs %base-packages %base-firmware)) ;;; Commentary: ;;; ;;; This module supports whole-system configuration. ;;; ;;; Code: (define (bootable-kernel-arguments kernel-arguments system.drv root-device) "Prepend extra arguments to KERNEL-ARGUMENTS that allow SYSTEM.DRV to be booted from ROOT-DEVICE" (cons* (string-append "--root=" root-device) #~(string-append "--system=" #$system.drv) #~(string-append "--load=" #$system.drv "/boot") kernel-arguments)) ;; System-wide configuration. ;; TODO: Add per-field docstrings/stexi. (define-record-type* operating-system make-operating-system operating-system? (kernel operating-system-kernel ; package (default linux-libre)) (kernel-arguments operating-system-user-kernel-arguments (default '())) ; list of gexps/strings (bootloader operating-system-bootloader) ; (initrd operating-system-initrd ; (list fs) -> M derivation (default base-initrd)) (firmware operating-system-firmware ; list of packages (default %base-firmware)) (host-name operating-system-host-name) ; string (hosts-file operating-system-hosts-file ; file-like | #f (default #f)) (mapped-devices operating-system-mapped-devices ; list of (default '())) (file-systems operating-system-file-systems) ; list of fs (swap-devices operating-system-swap-devices ; list of strings (default '())) (users operating-system-users ; list of user accounts (default %base-user-accounts)) (groups operating-system-groups ; list of user groups (default %base-groups)) (skeletons operating-system-skeletons ; list of name/monadic value (default (default-skeletons))) (issue operating-system-issue ; string (default %default-issue)) (packages operating-system-packages ; list of (PACKAGE OUTPUT...) (default %base-packages)) ; or just PACKAGE (timezone operating-system-timezone) ; string (locale operating-system-locale ; string (default "en_US.utf8")) (locale-definitions operating-system-locale-definitions ; list of (default %default-locale-definitions)) (locale-libcs operating-system-locale-libcs ; list of (default %default-locale-libcs)) (name-service-switch operating-system-name-service-switch ; (default %default-nss)) (services operating-system-user-services ; list of monadic services (default %base-services)) (pam-services operating-system-pam-services ; list of PAM services (default (base-pam-services))) (setuid-programs operating-system-setuid-programs (default %setuid-programs)) ; list of string-valued gexps (sudoers-file operating-system-sudoers-file ; file-like (default %sudoers-specification))) (define (operating-system-kernel-arguments os system.drv root-device) "Return all the kernel arguments, including the ones not specified directly by the user." (bootable-kernel-arguments (operating-system-user-kernel-arguments os) system.drv root-device)) ;;; ;;; Services. ;;; (define (non-boot-file-system-service os) "Return the file system service for the file systems of OS that are not marked as 'needed-for-boot'." (define file-systems (remove file-system-needed-for-boot? (operating-system-file-systems os))) (define (device-mappings fs) (let ((device (file-system-device fs))) (if (string? device) ;title is 'device (filter (lambda (md) (string=? (string-append "/dev/mapper/" (mapped-device-target md)) device)) (operating-system-mapped-devices os)) '()))) (define (add-dependencies fs) ;; Add the dependencies due to device mappings to FS. (file-system (inherit fs) (dependencies (delete-duplicates (append (device-mappings fs) (file-system-dependencies fs)) eq?)))) (service file-system-service-type (map add-dependencies file-systems))) (define (mapped-device-user device file-systems) "Return a file system among FILE-SYSTEMS that uses DEVICE, or #f." (let ((target (string-append "/dev/mapper/" (mapped-device-target device)))) (find (lambda (fs) (or (member device (file-system-dependencies fs)) (and (eq? 'device (file-system-title fs)) (string=? (file-system-device fs) target)))) file-systems))) (define (operating-system-user-mapped-devices os) "Return the subset of mapped devices that can be installed in user-land--i.e., those not needed during boot." (let ((devices (operating-system-mapped-devices os)) (file-systems (operating-system-file-systems os))) (filter (lambda (md) (let ((user (mapped-device-user md file-systems))) (or (not user) (not (file-system-needed-for-boot? user))))) devices))) (define (operating-system-boot-mapped-devices os) "Return the subset of mapped devices that must be installed during boot, from the initrd." (let ((devices (operating-system-mapped-devices os)) (file-systems (operating-system-file-systems os))) (filter (lambda (md) (let ((user (mapped-device-user md file-systems))) (and user (file-system-needed-for-boot? user)))) devices))) (define (device-mapping-services os) "Return the list of device-mapping services for OS as a list." (map device-mapping-service (operating-system-user-mapped-devices os))) (define (swap-services os) "Return the list of swap services for OS." (map swap-service (operating-system-swap-devices os))) (define* (system-linux-image-file-name #:optional (system (%current-system))) "Return the basename of the kernel image file for SYSTEM." ;; FIXME: Evaluate the conditional based on the actual current system. (cond ((string-prefix? "arm" (%current-system)) "zImage") ((string-prefix? "mips" (%current-system)) "vmlinuz") (else "bzImage"))) (define (operating-system-kernel-file os) "Return an object representing the absolute file name of the kernel image of OS." (file-append (operating-system-kernel os) "/" (system-linux-image-file-name os))) (define* (operating-system-directory-base-entries os #:key container?) "Return the basic entries of the 'system' directory of OS for use as the value of the SYSTEM-SERVICE-TYPE service." (mlet %store-monad ((locale (operating-system-locale-directory os))) (if container? (return `(("locale" ,locale))) (mlet %store-monad ((kernel -> (operating-system-kernel os)) (initrd (operating-system-initrd-file os)) (params (operating-system-boot-parameters-file os))) (return `(("kernel" ,kernel) ("parameters" ,params) ("initrd" ,initrd) ("locale" ,locale))))))) ;used by libc (define* (essential-services os #:key container?) "Return the list of essential services for OS. These are special services that implement part of what's declared in OS are responsible for low-level bookkeeping. CONTAINER? determines whether to return the list of services for a container or that of a \"bare metal\" system." (define known-fs (map file-system-mount-point (operating-system-file-systems os))) (let* ((mappings (device-mapping-services os)) (root-fs (root-file-system-service)) (other-fs (non-boot-file-system-service os)) (unmount (user-unmount-service known-fs)) (swaps (swap-services os)) (procs (user-processes-service)) (host-name (host-name-service (operating-system-host-name os))) (entries (operating-system-directory-base-entries os #:container? container?))) (cons* (service system-service-type entries) %boot-service ;; %SHEPHERD-ROOT-SERVICE must come first so that the gexp that ;; execs shepherd comes last in the boot script (XXX). Likewise, ;; the cleanup service must come last so that its gexp runs before ;; activation code. %shepherd-root-service %activation-service (service cleanup-service-type #f) (pam-root-service (operating-system-pam-services os)) (account-service (append (operating-system-accounts os) (operating-system-groups os)) (operating-system-skeletons os)) (operating-system-etc-service os) (service fstab-service-type '()) (session-environment-service (operating-system-environment-variables os)) host-name procs root-fs unmount (service setuid-program-service-type (operating-system-setuid-programs os)) (service profile-service-type (operating-system-packages os)) other-fs (append mappings swaps ;; Add the firmware service, unless we are building for a ;; container. (if container? '() (list %linux-bare-metal-service (service firmware-service-type (operating-system-firmware os)))))))) (define* (operating-system-services os #:key container?) "Return all the services of OS, including \"internal\" services that do not explicitly appear in OS." (append (operating-system-user-services os) (essential-services os #:container? container?))) ;;; ;;; /etc. ;;; (define %base-firmware ;; Firmware usable by default. (list ath9k-htc-firmware openfwwf-firmware)) (define %base-packages ;; Default set of packages globally visible. It should include anything ;; required for basic administrator tasks. (cons* procps psmisc which less zile nano lsof ;for Guix's 'list-runtime-roots' pciutils usbutils util-linux inetutils isc-dhcp ;; wireless-tools is deprecated in favor of iw, but it's still what ;; many people are familiar with, so keep it around. iw wireless-tools rfkill iproute net-tools ; XXX: remove when Inetutils suffices man-db info-reader ;the standalone Info reader (no Perl) ;; The 'sudo' command is already in %SETUID-PROGRAMS, but we also ;; want the other commands and the man pages (notably because ;; auto-completion in Emacs shell relies on man pages.) sudo ;; Get 'insmod' & co. from kmod, not module-init-tools, since udev ;; already depends on it anyway. kmod eudev e2fsprogs kbd bash-completion ;; The packages below are also in %FINAL-INPUTS, so take them from ;; there to avoid duplication. (map canonical-package (list guile-2.0 bash coreutils-8.27 findutils grep sed diffutils patch gawk tar gzip bzip2 xz lzip)))) (define %default-issue ;; Default contents for /etc/issue. " This is the GNU system. Welcome.\n") (define (local-host-aliases host-name) "Return aliases for HOST-NAME, to be used in /etc/hosts." (string-append "127.0.0.1 localhost " host-name "\n" "::1 localhost " host-name "\n")) (define (default-/etc/hosts host-name) "Return the default /etc/hosts file." (plain-file "hosts" (local-host-aliases host-name))) (define* (operating-system-etc-service os) "Return a that builds containing the static part of the /etc directory." (let ((login.defs (plain-file "login.defs" "# Empty for now.\n")) (issue (plain-file "issue" (operating-system-issue os))) (nsswitch (plain-file "nsswitch.conf" (name-service-switch->string (operating-system-name-service-switch os)))) ;; Startup file for POSIX-compliant login shells, which set system-wide ;; environment variables. (profile (mixed-text-file "profile" "\ # Crucial variables that could be missing in the profiles' 'etc/profile' # because they would require combining both profiles. # FIXME: See . export MANPATH=$HOME/.guix-profile/share/man:/run/current-system/profile/share/man export INFOPATH=$HOME/.guix-profile/share/info:/run/current-system/profile/share/info export XDG_DATA_DIRS=$HOME/.guix-profile/share:/run/current-system/profile/share export XDG_CONFIG_DIRS=$HOME/.guix-profile/etc/xdg:/run/current-system/profile/etc/xdg # Ignore the default value of 'PATH'. unset PATH # Load the system profile's settings. GUIX_PROFILE=/run/current-system/profile \\ . /run/current-system/profile/etc/profile # Prepend setuid programs. export PATH=/run/setuid-programs:$PATH # Since 'lshd' does not use pam_env, /etc/environment must be explicitly # loaded when someone logs in via SSH. See . # We need 'PATH' to be defined here, for 'cat' and 'cut'. Do this before # reading the user's 'etc/profile' to allow variables to be overridden. if [ -f /etc/environment -a -n \"$SSH_CLIENT\" \\ -a -z \"$LINUX_MODULE_DIRECTORY\" ] then . /etc/environment export `cat /etc/environment | cut -d= -f1` fi if [ -f \"$HOME/.guix-profile/etc/profile\" ] then # Load the user profile's settings. GUIX_PROFILE=\"$HOME/.guix-profile\" \\ . \"$HOME/.guix-profile/etc/profile\" else # At least define this one so that basic things just work # when the user installs their first package. export PATH=\"$HOME/.guix-profile/bin:$PATH\" fi # Set the umask, notably for users logging in via 'lsh'. # See . umask 022 # Allow GStreamer-based applications to find plugins. export GST_PLUGIN_PATH=\"$HOME/.guix-profile/lib/gstreamer-1.0\" if [ -n \"$BASH_VERSION\" -a -f /etc/bashrc ] then # Load Bash-specific initialization code. . /etc/bashrc fi ")) (bashrc (plain-file "bashrc" "\ # Bash-specific initialization. # The 'bash-completion' package. if [ -f /run/current-system/profile/etc/profile.d/bash_completion.sh ] then # Bash-completion sources ~/.bash_completion. It installs a dynamic # completion loader that searches its own completion files as well # as those in ~/.guix-profile and /run/current-system/profile. source /run/current-system/profile/etc/profile.d/bash_completion.sh fi\n"))) (etc-service `(("services" ,(file-append net-base "/etc/services")) ("protocols" ,(file-append net-base "/etc/protocols")) ("rpc" ,(file-append net-base "/etc/rpc")) ("login.defs" ,#~#$login.defs) ("issue" ,#~#$issue) ("nsswitch.conf" ,#~#$nsswitch) ("profile" ,#~#$profile) ("bashrc" ,#~#$bashrc) ("hosts" ,#~#$(or (operating-system-hosts-file os) (default-/etc/hosts (operating-system-host-name os)))) ("localtime" ,(file-append tzdata "/share/zoneinfo/" (operating-system-timezone os))) ("sudoers" ,(operating-system-sudoers-file os)))))) (define %root-account ;; Default root account. (user-account (name "root") (password "") (uid 0) (group "root") (comment "System administrator") (home-directory "/root"))) (define (operating-system-accounts os) "Return the user accounts for OS, including an obligatory 'root' account, and excluding accounts requested by services." ;; Make sure there's a root account. (if (find (lambda (user) (and=> (user-account-uid user) zero?)) (operating-system-users os)) (operating-system-users os) (cons %root-account (operating-system-users os)))) (define (maybe-string->file file-name thing) "If THING is a string, return a with THING as its content. Otherwise just return THING. This is for backward-compatibility of fields that used to be strings and are now file-like objects.." (match thing ((? string?) (warning (G_ "using a string for file '~a' is deprecated; \ use 'plain-file' instead~%") file-name) (plain-file file-name thing)) (x x))) (define (maybe-file->monadic file-name thing) "If THING is a value in %STORE-MONAD, return it as is; otherwise return THING in the %STORE-MONAD. This is for backward-compatibility of fields that used to be monadic values and are now file-like objects." (with-monad %store-monad (match thing ((? procedure?) (warning (G_ "using a monadic value for '~a' is deprecated; \ use 'plain-file' instead~%") file-name) thing) (x (return x))))) (define (operating-system-etc-directory os) "Return that static part of the /etc directory of OS." (etc-directory (fold-services (operating-system-services os) #:target-type etc-service-type))) (define (operating-system-environment-variables os) "Return the environment variables of OS for @var{session-environment-service-type}, to be used in @file{/etc/environment}." `(("LANG" . ,(operating-system-locale os)) ("TZ" . ,(operating-system-timezone os)) ("TZDIR" . ,(file-append tzdata "/share/zoneinfo")) ;; Tell 'modprobe' & co. where to look for modules. ("LINUX_MODULE_DIRECTORY" . "/run/booted-system/kernel/lib/modules") ;; These variables are honored by OpenSSL (libssl) and Git. ("SSL_CERT_DIR" . "/etc/ssl/certs") ("SSL_CERT_FILE" . "/etc/ssl/certs/ca-certificates.crt") ("GIT_SSL_CAINFO" . "/etc/ssl/certs/ca-certificates.crt") ;; 'GTK_DATA_PREFIX' must name one directory where GTK+ themes are ;; searched for. ("GTK_DATA_PREFIX" . "/run/current-system/profile") ;; By default, applications that use D-Bus, such as Emacs, abort at startup ;; when /etc/machine-id is missing. Make sure these warnings are non-fatal. ("DBUS_FATAL_WARNINGS" . "0") ;; XXX: Normally we wouldn't need to do this, but our glibc@2.23 package ;; used to look things up in 'PREFIX/lib/locale' instead of ;; '/run/current-system/locale' as was intended. Keep this hack around so ;; that people who still have glibc@2.23-using packages in their profiles ;; can use them correctly. ;; TODO: Remove when glibc@2.23 is long gone. ("GUIX_LOCPATH" . "/run/current-system/locale"))) (define %setuid-programs ;; Default set of setuid-root programs. (let ((shadow (@ (gnu packages admin) shadow))) (list (file-append shadow "/bin/passwd") (file-append shadow "/bin/su") (file-append inetutils "/bin/ping") (file-append inetutils "/bin/ping6") (file-append sudo "/bin/sudo") (file-append fuse "/bin/fusermount")))) (define %sudoers-specification ;; Default /etc/sudoers contents: 'root' and all members of the 'wheel' ;; group can do anything. See ;; . ;; TODO: Add a declarative API. (plain-file "sudoers" "\ root ALL=(ALL) ALL %wheel ALL=(ALL) ALL\n")) (define* (operating-system-activation-script os #:key container?) "Return the activation script for OS---i.e., the code that \"activates\" the stateful part of OS, including user accounts and groups, special directories, etc." (let* ((services (operating-system-services os #:container? container?)) (activation (fold-services services #:target-type activation-service-type))) (activation-service->script activation))) (define* (operating-system-boot-script os #:key container?) "Return the boot script for OS---i.e., the code started by the initrd once we're running in the final root. When CONTAINER? is true, skip all hardware-related operations as necessary when booting a Linux container." (let* ((services (operating-system-services os #:container? container?)) (boot (fold-services services #:target-type boot-service-type))) ;; BOOT is the script as a monadic value. (service-value boot))) (define (operating-system-user-accounts os) "Return the list of user accounts of OS." (let* ((services (operating-system-services os)) (account (fold-services services #:target-type account-service-type))) (filter user-account? (service-value account)))) (define (operating-system-shepherd-service-names os) "Return the list of Shepherd service names for OS." (append-map shepherd-service-provision (service-value (fold-services (operating-system-services os) #:target-type shepherd-root-service-type)))) (define* (operating-system-derivation os #:key container?) "Return a derivation that builds OS." (let* ((services (operating-system-services os #:container? container?)) (system (fold-services services))) ;; SYSTEM contains the derivation as a monadic value. (service-value system))) (define* (operating-system-profile os #:key container?) "Return a derivation that builds the system profile of OS." (mlet* %store-monad ((services -> (operating-system-services os #:container? container?)) (profile (fold-services services #:target-type profile-service-type))) (match profile (("profile" profile) (return profile))))) (define (operating-system-root-file-system os) "Return the root file system of OS." (find (match-lambda (($ device title "/") #t) (x #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 file-system-needed-for-boot? (operating-system-file-systems os))) (define mapped-devices (operating-system-boot-mapped-devices os)) (define make-initrd (operating-system-initrd os)) (mlet %store-monad ((initrd (make-initrd boot-file-systems #:linux (operating-system-kernel os) #:mapped-devices mapped-devices))) (return (file-append initrd "/initrd")))) (define (locale-name->definition* name) "Variant of 'locale-name->definition' that raises an error upon failure." (match (locale-name->definition name) (#f (raise (condition (&message (message (format #f (G_ "~a: invalid locale name") name)))))) (def def))) (define (operating-system-locale-directory os) "Return the directory containing the locales compiled for the definitions listed in OS. The C library expects to find it under /run/current-system/locale." (define name (operating-system-locale os)) (define definitions ;; While we're at it, check whether NAME is defined and add it if needed. (if (member name (map locale-definition-name (operating-system-locale-definitions os))) (operating-system-locale-definitions os) (cons (locale-name->definition* name) (operating-system-locale-definitions os)))) (locale-directory definitions #:libcs (operating-system-locale-libcs os))) (define (kernel->boot-label kernel) "Return a label for the bootloader menu entry that boots KERNEL." (string-append "GNU with " (string-titlecase (package-name kernel)) " " (package-version kernel) " (beta)")) (define (store-file-system file-systems) "Return the file system object among FILE-SYSTEMS that contains the store." (match (filter (lambda (fs) (and (file-system-mount? fs) (not (memq 'bind-mount (file-system-flags fs))) (string-prefix? (file-system-mount-point fs) (%store-prefix)))) file-systems) ((and candidates (head . tail)) (reduce (lambda (fs1 fs2) (if (> (string-length (file-system-mount-point fs1)) (string-length (file-system-mount-point fs2))) fs1 fs2)) head candidates)))) (define (operating-system-store-file-system os) "Return the file system that contains the store of OS." (store-file-system (operating-system-file-systems os))) (define* (operating-system-bootcfg os #:optional (old-entries '())) "Return the bootloader 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)) (root-device -> (if (eq? 'uuid (file-system-title root-fs)) (uuid->string (file-system-device root-fs)) (file-system-device root-fs))) (entry (operating-system-boot-parameters os system root-device))) (grub-configuration-file (operating-system-bootloader os) (list entry) #:old-entries old-entries))) (define (fs->boot-device fs) "Given FS, a object, return a value suitable for use as the device in a ." (case (file-system-title fs) ((uuid) (file-system-device fs)) ((label) (file-system-device fs)) (else #f))) (define (operating-system-boot-parameters os system.drv root-device) "Return a monadic record that describes the boot parameters of OS. SYSTEM.DRV is either a derivation or #f. If it's a derivation, adds kernel arguments for that derivation to ." (mlet* %store-monad ((initrd (operating-system-initrd-file os)) (store -> (operating-system-store-file-system os)) (label -> (kernel->boot-label (operating-system-kernel os)))) (return (boot-parameters (label label) (root-device root-device) (kernel (operating-system-kernel-file os)) (kernel-arguments (if system.drv (operating-system-kernel-arguments os system.drv root-device) (operating-system-user-kernel-arguments os))) (initrd initrd) (store-device (fs->boot-device store)) (store-mount-point (file-system-mount-point store)))))) (define* (operating-system-boot-parameters-file os #:optional (system.drv #f)) "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. SYSTEM.DRV is optional. If given, adds kernel arguments for that system to the returned file (since the returned file is then usually stored into the content-addressed \"system\" directory, it's usually not a good idea to give it because the content hash would change by the content hash being stored into the \"parameters\" file)." (mlet* %store-monad ((root -> (operating-system-root-file-system os)) (device -> (file-system-device root)) (params (operating-system-boot-parameters os system.drv device))) (gexp->file "parameters" #~(boot-parameters (version 0) (label #$(boot-parameters-label params)) (root-device #$(boot-parameters-root-device params)) (kernel #$(boot-parameters-kernel params)) (kernel-arguments #$(boot-parameters-kernel-arguments params)) (initrd #$(boot-parameters-initrd params)) (store (device #$(boot-parameters-store-device params)) (mount-point #$(boot-parameters-store-mount-point params)))) #:set-load-path? #f))) ;;; ;;; Boot parameters ;;; (define-record-type* boot-parameters make-boot-parameters boot-parameters? (label boot-parameters-label) ;; Because we will use the 'store-device' to create the GRUB search command, ;; the 'store-device' has slightly different semantics than 'root-device'. ;; The 'store-device' can be a file system uuid, a file system label, or #f, ;; but it cannot be a device path such as "/dev/sda3", since GRUB would not ;; understand that. The 'root-device', on the other hand, corresponds ;; exactly to the device field of the object representing the ;; OS's root file system, so it might be a device path like "/dev/sda3". (root-device boot-parameters-root-device) (store-device boot-parameters-store-device) (store-mount-point boot-parameters-store-mount-point) (kernel boot-parameters-kernel) (kernel-arguments boot-parameters-kernel-arguments) (initrd boot-parameters-initrd)) (define (read-boot-parameters port) "Read boot parameters from PORT and return the corresponding object or #f if the format is unrecognized." (match (read port) (('boot-parameters ('version 0) ('label label) ('root-device root) ('kernel linux) rest ...) (boot-parameters (label label) (root-device root) ;; In the past, we would store the directory name of the kernel instead ;; of the absolute file name of its image. Detect that and correct it. (kernel (if (string=? linux (direct-store-path linux)) (string-append linux "/" (system-linux-image-file-name)) linux)) (kernel-arguments (match (assq 'kernel-arguments rest) ((_ args) args) (#f '()))) ;the old format (initrd (match (assq 'initrd rest) (('initrd ('string-append directory file)) ;the old format (string-append directory file)) (('initrd (? string? file)) file))) (store-device (match (assq 'store rest) (('store ('device device) _ ...) device) (_ ;the old format ;; Root might be a device path like "/dev/sda1", which is not a ;; suitable GRUB device identifier. (if (string-prefix? "/" root) #f root)))) (store-mount-point (match (assq 'store rest) (('store ('device _) ('mount-point mount-point) _ ...) mount-point) (_ ;the old format "/"))))) (x ;unsupported format (warning (G_ "unrecognized boot parameters for '~a'~%") system) #f))) (define (read-boot-parameters-file system) "Read boot parameters from SYSTEM's (system or generation) \"parameters\" file and returns the corresponding object or #f if the format is unrecognized. The object has its kernel-arguments extended in order to make it bootable." (let* ((file (string-append system "/parameters")) (params (call-with-input-file file read-boot-parameters)) (root (boot-parameters-root-device params)) (root-device (if (bytevector? root) (uuid->string root) root)) (kernel-arguments (boot-parameters-kernel-arguments params))) (if params (boot-parameters (inherit params) (kernel-arguments (bootable-kernel-arguments kernel-arguments system root-device))) #f))) ;;; system.scm ends here