221 lines
8.3 KiB
Scheme
221 lines
8.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013 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 dmd)
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#:use-module (guix store)
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#:use-module (guix packages)
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#:use-module (guix derivations)
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#:use-module (guix records)
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#:use-module ((gnu packages base)
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#:select (glibc-final))
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#:use-module ((gnu packages system)
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#:select (mingetty inetutils))
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#:use-module ((gnu packages package-management)
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#:select (guix))
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#:use-module ((gnu packages linux)
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#:select (net-tools))
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (guix monads)
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#:export (service?
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service
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service-provision
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service-requirement
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service-respawn?
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service-start
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service-stop
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service-inputs
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host-name-service
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syslog-service
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mingetty-service
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nscd-service
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guix-service
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static-networking-service
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dmd-configuration-file))
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;;; Commentary:
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;;;
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;;; System services as cajoled by dmd.
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;;;
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;;; Code:
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(define-record-type* <service>
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service make-service
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service?
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(documentation service-documentation ; string
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(default "[No documentation.]"))
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(provision service-provision) ; list of symbols
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(requirement service-requirement ; list of symbols
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(default '()))
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(respawn? service-respawn? ; Boolean
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(default #t))
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(start service-start) ; expression
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(stop service-stop ; expression
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(default #f))
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(inputs service-inputs ; list of inputs
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(default '())))
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(define (host-name-service name)
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"Return a service that sets the host name to NAME."
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(with-monad %store-monad
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(return (service
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(documentation "Initialize the machine's host name.")
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(provision '(host-name))
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(start `(lambda _
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(sethostname ,name)))
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(respawn? #f)))))
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(define (mingetty-service tty)
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"Return a service to run mingetty on TTY."
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(mlet %store-monad ((mingetty-bin (package-file mingetty "sbin/mingetty")))
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(return
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(service
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(documentation (string-append "Run mingetty on " tty "."))
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(provision (list (symbol-append 'term- (string->symbol tty))))
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;; Since the login prompt shows the host name, wait for the 'host-name'
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;; service to be done.
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(requirement '(host-name))
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(start `(make-forkexec-constructor ,mingetty-bin "--noclear" ,tty))
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(stop `(make-kill-destructor))
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(inputs `(("mingetty" ,mingetty)))))))
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(define* (nscd-service #:key (glibc glibc-final))
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"Return a service that runs libc's name service cache daemon (nscd)."
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(mlet %store-monad ((nscd (package-file glibc "sbin/nscd")))
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(return (service
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(documentation "Run libc's name service cache daemon (nscd).")
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(provision '(nscd))
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(start `(make-forkexec-constructor ,nscd "-f" "/dev/null"
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"--foreground"))
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(stop `(make-kill-destructor))
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(respawn? #f)
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(inputs `(("glibc" ,glibc)))))))
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(define (syslog-service)
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"Return a service that runs 'syslogd' with reasonable default settings."
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;; Snippet adapted from the GNU inetutils manual.
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(define contents "
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# Log all kernel messages, authentication messages of
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# level notice or higher and anything of level err or
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# higher to the console.
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# Don't log private authentication messages!
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*.err;kern.*;auth.notice;authpriv.none /dev/console
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# Log anything (except mail) of level info or higher.
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# Don't log private authentication messages!
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*.info;mail.none;authpriv.none /var/log/messages
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# Same, in a different place.
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*.info;mail.none;authpriv.none /dev/tty12
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# The authpriv file has restricted access.
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authpriv.* /var/log/secure
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# Log all the mail messages in one place.
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mail.* /var/log/maillog
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")
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(mlet %store-monad
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((syslog.conf (text-file "syslog.conf" contents))
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(syslogd (package-file inetutils "libexec/syslogd")))
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(return
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(service
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(documentation "Run the syslog daemon (syslogd).")
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(provision '(syslogd))
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(start `(make-forkexec-constructor ,syslogd "--no-detach"
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"--rcfile" ,syslog.conf))
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(stop `(make-kill-destructor))
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(inputs `(("inetutils" ,inetutils)
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("syslog.conf" ,syslog.conf)))))))
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(define* (guix-service #:key (guix guix) (builder-group "guixbuild"))
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"Return a service that runs the build daemon from GUIX."
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(mlet %store-monad ((daemon (package-file guix "bin/guix-daemon")))
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(return (service
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(provision '(guix-daemon))
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(start `(make-forkexec-constructor ,daemon
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"--build-users-group"
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,builder-group))
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(stop `(make-kill-destructor))
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(inputs `(("guix" ,guix)))))))
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(define* (static-networking-service interface ip
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#:key
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gateway
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(inetutils inetutils)
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(net-tools net-tools))
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"Return a service that starts INTERFACE with address IP. If GATEWAY is
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true, it must be a string specifying the default network gateway."
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;; TODO: Eventually we should do this using Guile's networking procedures,
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;; like 'configure-qemu-networking' does, but the patch that does this is
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;; not yet in stock Guile.
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(mlet %store-monad ((ifconfig (package-file inetutils "bin/ifconfig"))
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(route (package-file net-tools "sbin/route")))
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(return
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(service
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(documentation
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(string-append "Set up networking on the '" interface
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"' interface using a static IP address."))
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(provision '(networking))
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(start `(lambda _
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;; Return #t if successfully started.
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(and (zero? (system* ,ifconfig ,interface ,ip "up"))
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,(if gateway
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`(zero? (system* ,route "add" "-net" "default"
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"gw" ,gateway))
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#t))))
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(stop `(lambda _
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;; Return #f is successfully stopped.
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(not (and (system* ,ifconfig ,interface "down")
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(system* ,route "del" "-net" "default")))))
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(respawn? #f)
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(inputs `(("inetutils" ,inetutils)
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,@(if gateway
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`(("net-tools" ,net-tools))
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'())))))))
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(define (dmd-configuration-file services)
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"Return the dmd configuration file for SERVICES."
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(define config
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`(begin
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(register-services
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,@(map (match-lambda
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(($ <service> documentation provision requirement
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respawn? start stop)
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`(make <service>
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#:docstring ,documentation
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#:provides ',provision
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#:requires ',requirement
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#:respawn? ,respawn?
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#:start ,start
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#:stop ,stop)))
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services))
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(for-each start ',(append-map service-provision services))))
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(text-file "dmd.conf" (object->string config)))
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;;; dmd.scm ends here
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