mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-16 03:45:24 -05:00
379 lines
14 KiB
Scheme
379 lines
14 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
||
;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
|
||
;;; Copyright © 2016 Alex Griffin <a@ajgrf.com>
|
||
;;;
|
||
;;; 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 system shadow)
|
||
#:use-module (guix records)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix store)
|
||
#:use-module (guix modules)
|
||
#:use-module (guix sets)
|
||
#:use-module (guix ui)
|
||
#:use-module (gnu services)
|
||
#:use-module (gnu services shepherd)
|
||
#:use-module ((gnu system file-systems)
|
||
#:select (%tty-gid))
|
||
#:use-module ((gnu packages admin)
|
||
#:select (shadow))
|
||
#:use-module (gnu packages bash)
|
||
#:use-module (gnu packages guile-wm)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-34)
|
||
#:use-module (srfi srfi-35)
|
||
#:export (user-account
|
||
user-account?
|
||
user-account-name
|
||
user-account-password
|
||
user-account-uid
|
||
user-account-group
|
||
user-account-supplementary-groups
|
||
user-account-comment
|
||
user-account-home-directory
|
||
user-account-create-home-directory?
|
||
user-account-shell
|
||
user-account-system?
|
||
|
||
user-group
|
||
user-group?
|
||
user-group-name
|
||
user-group-password
|
||
user-group-id
|
||
user-group-system?
|
||
|
||
default-skeletons
|
||
skeleton-directory
|
||
%base-groups
|
||
%base-user-accounts
|
||
|
||
account-service-type
|
||
account-service))
|
||
|
||
;;; Commentary:
|
||
;;;
|
||
;;; Utilities for configuring the Shadow tool suite ('login', 'passwd', etc.)
|
||
;;;
|
||
;;; Code:
|
||
|
||
(define-record-type* <user-account>
|
||
user-account make-user-account
|
||
user-account?
|
||
(name user-account-name)
|
||
(password user-account-password (default #f))
|
||
(uid user-account-uid (default #f))
|
||
(group user-account-group) ; number | string
|
||
(supplementary-groups user-account-supplementary-groups
|
||
(default '())) ; list of strings
|
||
(comment user-account-comment (default ""))
|
||
(home-directory user-account-home-directory)
|
||
(create-home-directory? user-account-create-home-directory? ;Boolean
|
||
(default #t))
|
||
(shell user-account-shell ; gexp
|
||
(default (file-append bash "/bin/bash")))
|
||
(system? user-account-system? ; Boolean
|
||
(default #f)))
|
||
|
||
(define-record-type* <user-group>
|
||
user-group make-user-group
|
||
user-group?
|
||
(name user-group-name)
|
||
(password user-group-password (default #f))
|
||
(id user-group-id (default #f))
|
||
(system? user-group-system? ; Boolean
|
||
(default #f)))
|
||
|
||
|
||
(define %base-groups
|
||
;; Default set of groups.
|
||
(let-syntax ((system-group (syntax-rules ()
|
||
((_ args ...)
|
||
(user-group (system? #t) args ...)))))
|
||
(list (system-group (name "root") (id 0))
|
||
(system-group (name "wheel")) ; root-like users
|
||
(system-group (name "users")) ; normal users
|
||
(system-group (name "nogroup")) ; for daemons etc.
|
||
|
||
;; The following groups are conventionally used by things like udev to
|
||
;; control access to hardware devices.
|
||
(system-group (name "tty") (id %tty-gid))
|
||
(system-group (name "dialout"))
|
||
(system-group (name "kmem"))
|
||
(system-group (name "input")) ; input devices, from udev
|
||
(system-group (name "video"))
|
||
(system-group (name "audio"))
|
||
(system-group (name "netdev")) ; used in avahi-dbus.conf
|
||
(system-group (name "lp"))
|
||
(system-group (name "disk"))
|
||
(system-group (name "floppy"))
|
||
(system-group (name "cdrom"))
|
||
(system-group (name "tape"))
|
||
(system-group (name "kvm"))))) ; for /dev/kvm
|
||
|
||
(define %base-user-accounts
|
||
;; List of standard user accounts. Note that "root" is a special case, so
|
||
;; it's not listed here.
|
||
(list (user-account
|
||
(name "nobody")
|
||
(uid 65534)
|
||
(group "nogroup")
|
||
(shell (file-append shadow "/sbin/nologin"))
|
||
(home-directory "/nonexistent")
|
||
(create-home-directory? #f)
|
||
(system? #t))))
|
||
|
||
(define (default-skeletons)
|
||
"Return the default skeleton files for /etc/skel. These files are copied by
|
||
'useradd' in the home directory of newly created user accounts."
|
||
(define copy-guile-wm
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (guix build utils))
|
||
(copy-file (car (find-files #+guile-wm "wm-init-sample.scm"))
|
||
#$output))))
|
||
|
||
(let ((profile (plain-file "bash_profile" "\
|
||
# Honor per-interactive-shell startup file
|
||
if [ -f ~/.bashrc ]; then . ~/.bashrc; fi\n"))
|
||
(bashrc (plain-file "bashrc" "\
|
||
# Bash initialization for interactive non-login shells and
|
||
# for remote shells (info \"(bash) Bash Startup Files\").
|
||
|
||
# Export 'SHELL' to child processes. Programs such as 'screen'
|
||
# honor it and otherwise use /bin/sh.
|
||
export SHELL
|
||
|
||
if [ -n \"$SSH_CLIENT\" -a -z \"`type -P cat`\" ]
|
||
then
|
||
# We are being invoked from a non-interactive SSH session
|
||
# (as in \"ssh host command\") but 'cat' cannot be found
|
||
# in $PATH. Source /etc/profile so we get $PATH and other
|
||
# essential variables.
|
||
source /etc/profile
|
||
fi
|
||
|
||
# Adjust the prompt depending on whether we're in 'guix environment'.
|
||
if [ -n \"$GUIX_ENVIRONMENT\" ]
|
||
then
|
||
PS1='\\u@\\h \\w [env]\\$ '
|
||
else
|
||
PS1='\\u@\\h \\w\\$ '
|
||
fi
|
||
alias ls='ls -p --color'
|
||
alias ll='ls -l'
|
||
alias grep='grep --color'\n"))
|
||
(zlogin (plain-file "zlogin" "\
|
||
# Honor system-wide environment variables
|
||
source /etc/profile\n"))
|
||
(guile-wm (computed-file "guile-wm" copy-guile-wm))
|
||
(xdefaults (plain-file "Xdefaults" "\
|
||
XTerm*utf8: always
|
||
XTerm*metaSendsEscape: true\n"))
|
||
(gdbinit (plain-file "gdbinit" "\
|
||
# Tell GDB where to look for separate debugging files.
|
||
set debug-file-directory ~/.guix-profile/lib/debug\n")))
|
||
`((".bash_profile" ,profile)
|
||
(".bashrc" ,bashrc)
|
||
(".zlogin" ,zlogin)
|
||
(".Xdefaults" ,xdefaults)
|
||
(".guile" ,(plain-file "dot-guile"
|
||
(string-append
|
||
"(use-modules (ice-9 readline))\n\n"
|
||
";; Enable completion at the REPL.\n"
|
||
"(activate-readline)\n")))
|
||
(".guile-wm" ,guile-wm)
|
||
(".gdbinit" ,gdbinit))))
|
||
|
||
(define (skeleton-directory skeletons)
|
||
"Return a directory containing SKELETONS, a list of name/derivation tuples."
|
||
(computed-file "skel"
|
||
(with-imported-modules '((guix build utils))
|
||
#~(begin
|
||
(use-modules (ice-9 match)
|
||
(guix build utils))
|
||
|
||
(mkdir #$output)
|
||
(chdir #$output)
|
||
|
||
;; Note: copy the skeletons instead of symlinking
|
||
;; them like 'file-union' does, because 'useradd'
|
||
;; would just copy the symlinks as is.
|
||
(for-each (match-lambda
|
||
((target source)
|
||
(copy-recursively source target)))
|
||
'#$skeletons)
|
||
#t))))
|
||
|
||
(define (assert-valid-users/groups users groups)
|
||
"Raise an error if USERS refer to groups not listed in GROUPS."
|
||
(let ((groups (list->set (map user-group-name groups))))
|
||
(define (validate-supplementary-group user group)
|
||
(unless (set-contains? groups group)
|
||
(raise (condition
|
||
(&message
|
||
(message
|
||
(format #f (G_ "supplementary group '~a' \
|
||
of user '~a' is undeclared")
|
||
group
|
||
(user-account-name user))))))))
|
||
|
||
(for-each (lambda (user)
|
||
(unless (set-contains? groups (user-account-group user))
|
||
(raise (condition
|
||
(&message
|
||
(message
|
||
(format #f (G_ "primary group '~a' \
|
||
of user '~a' is undeclared")
|
||
(user-account-group user)
|
||
(user-account-name user)))))))
|
||
|
||
(for-each (cut validate-supplementary-group user <>)
|
||
(user-account-supplementary-groups user)))
|
||
users)))
|
||
|
||
|
||
;;;
|
||
;;; Service.
|
||
;;;
|
||
|
||
(define (user-group->gexp group)
|
||
"Turn GROUP, a <user-group> object, into a list-valued gexp suitable for
|
||
'active-groups'."
|
||
#~(list #$(user-group-name group)
|
||
#$(user-group-password group)
|
||
#$(user-group-id group)
|
||
#$(user-group-system? group)))
|
||
|
||
(define (user-account->gexp account)
|
||
"Turn ACCOUNT, a <user-account> object, into a list-valued gexp suitable for
|
||
'activate-users'."
|
||
#~`(#$(user-account-name account)
|
||
#$(user-account-uid account)
|
||
#$(user-account-group account)
|
||
#$(user-account-supplementary-groups account)
|
||
#$(user-account-comment account)
|
||
#$(user-account-home-directory account)
|
||
#$(user-account-create-home-directory? account)
|
||
,#$(user-account-shell account) ; this one is a gexp
|
||
#$(user-account-password account)
|
||
#$(user-account-system? account)))
|
||
|
||
(define (account-activation accounts+groups)
|
||
"Return a gexp that activates ACCOUNTS+GROUPS, a list of <user-account> and
|
||
<user-group> objects. Raise an error if a user account refers to a undefined
|
||
group."
|
||
(define accounts
|
||
(filter user-account? accounts+groups))
|
||
|
||
(define user-specs
|
||
(map user-account->gexp accounts))
|
||
|
||
(define groups
|
||
(filter user-group? accounts+groups))
|
||
|
||
(define group-specs
|
||
(map user-group->gexp groups))
|
||
|
||
(assert-valid-users/groups accounts groups)
|
||
|
||
;; Add users and user groups.
|
||
#~(begin
|
||
(setenv "PATH"
|
||
(string-append #$(@ (gnu packages admin) shadow) "/sbin"))
|
||
(activate-users+groups (list #$@user-specs)
|
||
(list #$@group-specs))))
|
||
|
||
(define (account-shepherd-service accounts+groups)
|
||
"Return a Shepherd service that creates the home directories for the user
|
||
accounts among ACCOUNTS+GROUPS."
|
||
(define accounts
|
||
(filter user-account? accounts+groups))
|
||
|
||
;; Create home directories only once 'file-systems' is up. This makes sure
|
||
;; they are created in the right place if /home lives on a separate
|
||
;; partition.
|
||
;;
|
||
;; XXX: We arrange for this service to stop right after it's done its job so
|
||
;; that 'guix system reconfigure' knows that it can reload it fearlessly
|
||
;; (and thus create new home directories). The cost of this hack is that
|
||
;; there's a small window during which first-time logins could happen before
|
||
;; the home directory has been created.
|
||
(list (shepherd-service
|
||
(requirement '(file-systems))
|
||
(provision '(user-homes))
|
||
(modules '((gnu build activation)))
|
||
(start (with-imported-modules (source-module-closure
|
||
'((gnu build activation)))
|
||
#~(lambda ()
|
||
(activate-user-home
|
||
(list #$@(map user-account->gexp accounts)))
|
||
#f))) ;stop
|
||
(stop #~(const #f))
|
||
(respawn? #f)
|
||
(documentation "Create user home directories."))))
|
||
|
||
(define (shells-file shells)
|
||
"Return a file-like object that builds a shell list for use as /etc/shells
|
||
based on SHELLS. /etc/shells is used by xterm, polkit, and other programs."
|
||
(computed-file "shells"
|
||
#~(begin
|
||
(use-modules (srfi srfi-1))
|
||
|
||
(define shells
|
||
(delete-duplicates (list #$@shells)))
|
||
|
||
(call-with-output-file #$output
|
||
(lambda (port)
|
||
(display "\
|
||
/bin/sh
|
||
/run/current-system/profile/bin/sh
|
||
/run/current-system/profile/bin/bash\n" port)
|
||
(for-each (lambda (shell)
|
||
(display shell port)
|
||
(newline port))
|
||
shells))))))
|
||
(define (etc-files arguments)
|
||
"Filter out among ARGUMENTS things corresponding to skeletons, and return
|
||
the /etc/skel directory for those."
|
||
(let ((skels (filter pair? arguments))
|
||
(users (filter user-account? arguments)))
|
||
`(("skel" ,(skeleton-directory skels))
|
||
("shells" ,(shells-file (map user-account-shell users))))))
|
||
|
||
(define account-service-type
|
||
(service-type (name 'account)
|
||
|
||
;; Concatenate <user-account>, <user-group>, and skeleton
|
||
;; lists.
|
||
(compose concatenate)
|
||
(extend append)
|
||
|
||
(extensions
|
||
(list (service-extension activation-service-type
|
||
account-activation)
|
||
(service-extension shepherd-root-service-type
|
||
account-shepherd-service)
|
||
(service-extension etc-service-type
|
||
etc-files)))))
|
||
|
||
(define (account-service accounts+groups skeletons)
|
||
"Return a <service> that takes care of user accounts and user groups, with
|
||
ACCOUNTS+GROUPS as its initial list of accounts and groups."
|
||
(service account-service-type
|
||
(append skeletons accounts+groups)))
|
||
|
||
;;; shadow.scm ends here
|