mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-26 06:18:07 -05:00
6c2a6033b4
According to https://gitlab.gnome.org/GNOME/glib/-/merge_requests/3101, glib now searches for the session bus socket in runstatedir. The dbus service must thus have its socket in /run/dbus. For interoperability with the dbus standard, /run/dbus is also symlinked to /var/run/dbus. * gnu/services/dbus.scm (dbus-activation): Symlink /run/dbus to /var/run/dbus. (%dbus-accounts): Run dbus in /run/dbus. (dbus-root-service-type): Save the pid file in /run/dbus. Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>
443 lines
19 KiB
Scheme
443 lines
19 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
|
||
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
|
||
;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
|
||
;;;
|
||
;;; 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 <http://www.gnu.org/licenses/>.
|
||
|
||
(define-module (gnu services dbus)
|
||
#:use-module (gnu services)
|
||
#:use-module (gnu services shepherd)
|
||
#:use-module (gnu system setuid)
|
||
#:use-module (gnu system shadow)
|
||
#:use-module (gnu system pam)
|
||
#:use-module ((gnu packages glib) #:select (dbus))
|
||
#:use-module (gnu packages polkit)
|
||
#:use-module (gnu packages admin)
|
||
#:use-module (guix deprecation)
|
||
#:use-module (guix gexp)
|
||
#:use-module ((guix packages) #:select (package-name))
|
||
#:use-module (guix records)
|
||
#:use-module (guix modules)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (ice-9 match)
|
||
#:export (dbus-configuration
|
||
dbus-configuration?
|
||
dbus-root-service-type
|
||
dbus-service ; deprecated
|
||
wrapped-dbus-service
|
||
|
||
polkit-configuration
|
||
polkit-configuration?
|
||
polkit-service-type
|
||
polkit-service)) ; deprecated
|
||
|
||
;;;
|
||
;;; D-Bus.
|
||
;;;
|
||
|
||
(define-record-type* <dbus-configuration>
|
||
dbus-configuration make-dbus-configuration
|
||
dbus-configuration?
|
||
(dbus dbus-configuration-dbus ;file-like
|
||
(default dbus))
|
||
(services dbus-configuration-services ;list of <package>
|
||
(default '()))
|
||
(verbose? dbus-configuration-verbose? ;boolean
|
||
(default #f)))
|
||
|
||
(define (system-service-directory services)
|
||
"Return the system service directory, containing @code{.service} files for
|
||
all the services that may be activated by the daemon."
|
||
(computed-file "dbus-system-services"
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils)
|
||
(srfi srfi-1))
|
||
|
||
(define files
|
||
(append-map (lambda (service)
|
||
(find-files
|
||
(string-append
|
||
service
|
||
"/share/dbus-1/")
|
||
"\\.service$"))
|
||
(list #$@services)))
|
||
|
||
(mkdir #$output)
|
||
(for-each (lambda (file)
|
||
(symlink file
|
||
(string-append #$output "/"
|
||
(basename file))))
|
||
files)
|
||
#t))))
|
||
|
||
(define (dbus-configuration-directory services)
|
||
"Return a directory contains the @code{system-local.conf} file for DBUS that
|
||
includes the @code{etc/dbus-1/system.d} directories of each package listed in
|
||
@var{services}."
|
||
(define build
|
||
#~(begin
|
||
(use-modules (sxml simple)
|
||
(srfi srfi-1))
|
||
|
||
(define-syntax directives
|
||
(syntax-rules ()
|
||
;; Expand the given directives (SXML expressions) only if their
|
||
;; key names a file that exists.
|
||
((_ (name directory) rest ...)
|
||
(let ((dir directory))
|
||
(if (file-exists? dir)
|
||
`((name ,dir)
|
||
,@(directives rest ...))
|
||
(directives rest ...))))
|
||
((_)
|
||
'())))
|
||
|
||
(define (services->sxml services)
|
||
;; Return the SXML 'includedir' clauses for DIRS.
|
||
`(busconfig
|
||
;; Increase this timeout to 300 seconds to work around race-y
|
||
;; failures such as <https://issues.guix.gnu.org/52051> on slow
|
||
;; computers with slow I/O.
|
||
(limit (@ (name "auth_timeout")) "300000")
|
||
(servicehelper "/run/setuid-programs/dbus-daemon-launch-helper")
|
||
|
||
;; First, the '.service' files of services subject to activation.
|
||
;; We use a fixed location under /etc because the setuid helper
|
||
;; looks for them in that location and nowhere else. See
|
||
;; <https://bugs.freedesktop.org/show_bug.cgi?id=92458>.
|
||
(servicedir "/etc/dbus-1/system-services")
|
||
|
||
,@(append-map (lambda (dir)
|
||
(directives
|
||
(includedir
|
||
(string-append dir "/etc/dbus-1/system.d"))
|
||
(includedir
|
||
(string-append dir "/share/dbus-1/system.d"))
|
||
(servicedir ;for '.service' files
|
||
(string-append dir "/share/dbus-1/services"))))
|
||
services)))
|
||
|
||
(mkdir #$output)
|
||
|
||
;; Provide /etc/dbus-1/system-services, which is where the setuid
|
||
;; helper looks for system service files.
|
||
(symlink #$(system-service-directory services)
|
||
(string-append #$output "/system-services"))
|
||
|
||
;; 'system-local.conf' is automatically included by the default
|
||
;; 'system.conf', so this is where we stuff our own things.
|
||
(call-with-output-file (string-append #$output "/system-local.conf")
|
||
(lambda (port)
|
||
(sxml->xml (services->sxml (list #$@services))
|
||
port)))))
|
||
|
||
(computed-file "dbus-configuration" build))
|
||
|
||
(define (dbus-etc-files config)
|
||
"Return a list of FILES for @var{etc-service-type} to build the
|
||
@code{/etc/dbus-1} directory."
|
||
(list `("dbus-1" ,(dbus-configuration-directory
|
||
(dbus-configuration-services config)))))
|
||
|
||
(define %dbus-accounts
|
||
;; Accounts used by the system bus.
|
||
(list (user-group (name "messagebus") (system? #t))
|
||
(user-account
|
||
(name "messagebus")
|
||
(group "messagebus")
|
||
(system? #t)
|
||
(comment "D-Bus system bus user")
|
||
(home-directory "/run/dbus")
|
||
(shell (file-append shadow "/sbin/nologin")))))
|
||
|
||
(define dbus-setuid-programs
|
||
;; Return a list of <setuid-program> for the program that we need.
|
||
(match-lambda
|
||
(($ <dbus-configuration> dbus services)
|
||
(list (setuid-program
|
||
(program (file-append
|
||
dbus "/libexec/dbus-daemon-launch-helper")))))))
|
||
|
||
(define (dbus-activation config)
|
||
"Return an activation gexp for D-Bus using @var{config}."
|
||
(with-imported-modules (source-module-closure
|
||
'((gnu build activation)
|
||
(guix build utils)))
|
||
#~(begin
|
||
(use-modules (gnu build activation)
|
||
(guix build utils))
|
||
|
||
(let ((user (getpwnam "messagebus")))
|
||
;; This directory contains the daemon's socket so it must be
|
||
;; world-readable.
|
||
(mkdir-p/perms "/run/dbus" user #o755))
|
||
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(symlink "/run/dbus" "/var/run/dbus"))
|
||
(lambda args
|
||
(let ((errno (system-error-errno args)))
|
||
(cond
|
||
((= errno EEXIST)
|
||
(let ((existing-name
|
||
(false-if-exception
|
||
(readlink "/var/run/dbus"))))
|
||
(unless (equal? existing-name "/run/dbus")
|
||
;; Move the content of /var/run/dbus to /run/dbus, and
|
||
;; retry.
|
||
(let ((dir (opendir "/var/run/dbus")))
|
||
(let loop ((next (readdir dir)))
|
||
(cond
|
||
((eof-object? next) (closedir dir))
|
||
((member next '("." "..")) (loop (readdir dir)))
|
||
(else
|
||
(begin
|
||
(rename-file (string-append "/var/run/dbus/" next)
|
||
(string-append "/run/dbus/" next))
|
||
(loop (readdir dir))))))))
|
||
(rmdir "/var/run/dbus")
|
||
(symlink "/run/dbus" "/var/run/dbus")))
|
||
(else
|
||
(format (current-error-port)
|
||
"Failed to symlink /run/dbus to /var/run/dbus: ~s~%"
|
||
(strerror errno))
|
||
(error "cannot create /var/run/dbus"))))))
|
||
|
||
(unless (file-exists? "/etc/machine-id")
|
||
(format #t "creating /etc/machine-id...~%")
|
||
(invoke (string-append #$(dbus-configuration-dbus config)
|
||
"/bin/dbus-uuidgen")
|
||
"--ensure=/etc/machine-id")))))
|
||
|
||
(define dbus-shepherd-service
|
||
(match-lambda
|
||
(($ <dbus-configuration> dbus _ verbose?)
|
||
(list (shepherd-service
|
||
(documentation "Run the D-Bus system daemon.")
|
||
(provision '(dbus-system))
|
||
(requirement '(user-processes syslogd))
|
||
(start #~(make-forkexec-constructor
|
||
(list (string-append #$dbus "/bin/dbus-daemon")
|
||
"--nofork" "--system" "--syslog-only")
|
||
#$@(if verbose?
|
||
;; Since the verbose output goes to the console,
|
||
;; not syslog, add a log file to capture it.
|
||
'(#:environment-variables '("DBUS_VERBOSE=1")
|
||
#:log-file "/var/log/dbus-daemon.log")
|
||
'())
|
||
#:pid-file "/run/dbus/pid"))
|
||
(stop #~(make-kill-destructor)))))))
|
||
|
||
(define dbus-root-service-type
|
||
(service-type (name 'dbus)
|
||
(extensions
|
||
(list (service-extension shepherd-root-service-type
|
||
dbus-shepherd-service)
|
||
(service-extension activation-service-type
|
||
dbus-activation)
|
||
(service-extension etc-service-type
|
||
dbus-etc-files)
|
||
(service-extension account-service-type
|
||
(const %dbus-accounts))
|
||
(service-extension setuid-program-service-type
|
||
dbus-setuid-programs)))
|
||
|
||
;; Extensions consist of lists of packages (representing D-Bus
|
||
;; services) that we just concatenate.
|
||
(compose concatenate)
|
||
|
||
;; The service's parameters field is extended by augmenting
|
||
;; its <dbus-configuration> 'services' field.
|
||
(extend (lambda (config services)
|
||
(dbus-configuration
|
||
(inherit config)
|
||
(services
|
||
(append (dbus-configuration-services config)
|
||
services)))))
|
||
|
||
(default-value (dbus-configuration))
|
||
(description "Run the system-wide D-Bus inter-process message
|
||
bus. It allows programs and daemons to communicate and is also responsible
|
||
for spawning (@dfn{activating}) D-Bus services on demand.")))
|
||
|
||
(define-deprecated (dbus-service #:key (dbus dbus) (services '()) verbose?)
|
||
dbus-root-service-type
|
||
"Return a service that runs the \"system bus\", using @var{dbus}, with
|
||
support for @var{services}. When @var{verbose?} is true, it causes the
|
||
@samp{DBUS_VERBOSE} environment variable to be set to @samp{1}; a
|
||
verbose-enabled D-Bus package such as @code{dbus-verbose} should be provided
|
||
as @var{dbus} in this scenario.
|
||
|
||
@uref{http://dbus.freedesktop.org/, D-Bus} is an inter-process communication
|
||
facility. Its system bus is used to allow system services to communicate and
|
||
be notified of system-wide events.
|
||
|
||
@var{services} must be a list of packages that provide an
|
||
@file{etc/dbus-1/system.d} directory containing additional D-Bus configuration
|
||
and policy files. For example, to allow avahi-daemon to use the system bus,
|
||
@var{services} must be equal to @code{(list avahi)}."
|
||
(service dbus-root-service-type
|
||
(dbus-configuration (dbus dbus)
|
||
(services services)
|
||
(verbose? verbose?))))
|
||
|
||
(define (wrapped-dbus-service service program variables)
|
||
"Return a wrapper for @var{service}, a package containing a D-Bus service,
|
||
where @var{program} is wrapped such that @var{variables}, a list of name/value
|
||
tuples, are all set as environment variables when the bus daemon launches it."
|
||
(define wrapper
|
||
(program-file (string-append (package-name service) "-program-wrapper")
|
||
#~(begin
|
||
(use-modules (ice-9 match))
|
||
|
||
(for-each (match-lambda
|
||
((variable value)
|
||
(setenv variable value)))
|
||
'#$variables)
|
||
|
||
(apply execl (string-append #$service "/" #$program)
|
||
(string-append #$service "/" #$program)
|
||
(cdr (command-line))))))
|
||
|
||
(define build
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
|
||
(define service-directory
|
||
"/share/dbus-1/system-services")
|
||
|
||
(mkdir-p (dirname (string-append #$output
|
||
service-directory)))
|
||
(copy-recursively (string-append #$service
|
||
service-directory)
|
||
(string-append #$output
|
||
service-directory))
|
||
(symlink (string-append #$service "/etc") ;for etc/dbus-1
|
||
(string-append #$output "/etc"))
|
||
|
||
(for-each (lambda (file)
|
||
(substitute* file
|
||
(("Exec[[:blank:]]*=[[:blank:]]*([[:graph:]]+)(.*)$"
|
||
_ original-program arguments)
|
||
(string-append "Exec=" #$wrapper arguments
|
||
"\n"))))
|
||
(find-files #$output "\\.service$")))))
|
||
|
||
(computed-file (string-append (package-name service) "-wrapper")
|
||
build))
|
||
|
||
|
||
;;;
|
||
;;; Polkit privilege management service.
|
||
;;;
|
||
|
||
(define-record-type* <polkit-configuration>
|
||
polkit-configuration make-polkit-configuration
|
||
polkit-configuration?
|
||
(polkit polkit-configuration-polkit ;file-like
|
||
(default polkit))
|
||
(actions polkit-configuration-actions ;list of file-like
|
||
(default '())))
|
||
|
||
(define %polkit-accounts
|
||
(list (user-group (name "polkitd") (system? #t))
|
||
(user-account
|
||
(name "polkitd")
|
||
(group "polkitd")
|
||
(system? #t)
|
||
(comment "Polkit daemon user")
|
||
(home-directory "/var/empty")
|
||
(shell "/run/current-system/profile/sbin/nologin"))))
|
||
|
||
(define %polkit-pam-services
|
||
(list (unix-pam-service "polkit-1")))
|
||
|
||
(define (polkit-directory packages)
|
||
"Return a directory containing an @file{actions} and possibly a
|
||
@file{rules.d} sub-directory, for use as @file{/etc/polkit-1}."
|
||
(with-imported-modules '((guix build union))
|
||
(computed-file "etc-polkit-1"
|
||
#~(begin
|
||
(use-modules (guix build union) (srfi srfi-26))
|
||
|
||
(union-build #$output
|
||
(map (cut string-append <>
|
||
"/share/polkit-1")
|
||
(list #$@packages)))))))
|
||
|
||
(define polkit-etc-files
|
||
(match-lambda
|
||
(($ <polkit-configuration> polkit packages)
|
||
`(("polkit-1" ,(polkit-directory (cons polkit packages)))))))
|
||
|
||
(define polkit-setuid-programs
|
||
(match-lambda
|
||
(($ <polkit-configuration> polkit)
|
||
(map file-like->setuid-program
|
||
(list (file-append polkit "/lib/polkit-1/polkit-agent-helper-1")
|
||
(file-append polkit "/bin/pkexec"))))))
|
||
|
||
(define polkit-service-type
|
||
(service-type (name 'polkit)
|
||
(extensions
|
||
(list (service-extension account-service-type
|
||
(const %polkit-accounts))
|
||
(service-extension pam-root-service-type
|
||
(const %polkit-pam-services))
|
||
(service-extension dbus-root-service-type
|
||
(compose
|
||
list
|
||
polkit-configuration-polkit))
|
||
(service-extension etc-service-type
|
||
polkit-etc-files)
|
||
(service-extension setuid-program-service-type
|
||
polkit-setuid-programs)))
|
||
|
||
;; Extensions are lists of packages that provide polkit rules
|
||
;; or actions under share/polkit-1/{actions,rules.d}.
|
||
(compose concatenate)
|
||
(extend (lambda (config actions)
|
||
(polkit-configuration
|
||
(inherit config)
|
||
(actions
|
||
(append (polkit-configuration-actions config)
|
||
actions)))))
|
||
|
||
(default-value (polkit-configuration))
|
||
(description
|
||
"Run the
|
||
@uref{http://www.freedesktop.org/wiki/Software/polkit/, Polkit privilege
|
||
management service}, which allows system administrators to grant access to
|
||
privileged operations in a structured way. Polkit is a requirement for most
|
||
desktop environments, such as GNOME.")))
|
||
|
||
(define-deprecated (polkit-service #:key (polkit polkit))
|
||
polkit-service-type
|
||
"Return a service that runs the
|
||
@uref{http://www.freedesktop.org/wiki/Software/polkit/, Polkit privilege
|
||
management service}, which allows system administrators to grant access to
|
||
privileged operations in a structured way. By querying the Polkit service, a
|
||
privileged system component can know when it should grant additional
|
||
capabilities to ordinary users. For example, an ordinary user can be granted
|
||
the capability to suspend the system if the user is logged in locally."
|
||
(service polkit-service-type
|
||
(polkit-configuration (polkit polkit))))
|
||
|
||
;;; dbus.scm ends here
|