;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014 John Darrington <jmd@gnu.org>
;;; Copyright © 2016, 2017 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; 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 packages busybox)
  #:use-module (guix licenses)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu)
  #:use-module (gnu packages)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages perl))

(define-public busybox
  (package
    (name "busybox")
    (version "1.26.2")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://www.busybox.net/downloads/" name "-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "05mg6rh5smkzfwqfcazkpwy6h6555llsazikqnvwkaf17y8l8gns"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda _ (zero? (system* "make" "defconfig"))))
         (replace 'check
           (lambda _
             (substitute* '("testsuite/du/du-s-works"
                            "testsuite/du/du-works")
               (("/bin") "/etc"))  ; there is no <pre>
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson &lt;davet@gnu.org&gt;
;;; Copyright © 2017-2019, 2022, 2023 Ludovic Courtès &lt;ludo@gnu.org&gt;
;;;
;;; 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 &lt;http://www.gnu.org/licenses/&gt;.

(define-module (gnu build linux-container)
  #:use-module (ice-9 format)
  #:use-module (ice-9 match)
  #:use-module (ice-9 rdelim)
  #:use-module (srfi srfi-98)
  #:use-module (guix build utils)
  #:use-module (guix build syscalls)
  #:use-module (gnu system file-systems)          ;&lt;file-system&gt;
  #:use-module ((gnu build file-systems) #:select (mount-file-system))
  #:export (user-namespace-supported?
            unprivileged-user-namespace-supported?
            setgroups-supported?
            %namespaces
            run-container
            call-with-container
            container-excursion
            container-excursion*))

(define (user-namespace-supported?)
  &quot;Return #t if user namespaces are supported on this system.&quot;
  (file-exists? &quot;/proc/self/ns/user&quot;))

(define (unprivileged-user-namespace-supported?)
  &quot;Return #t if user namespaces can be created by unprivileged users.&quot;
  (let ((userns-file &quot;/proc/sys/kernel/unprivileged_userns_clone&quot;))
    (if (file-exists? userns-file)
        (eqv? #\1 (call-with-input-file userns-file read-char))
        #t)))

(define (setgroups-supported?)
  &quot;Return #t if the setgroups proc file, introduced in Linux-libre 3.19,
exists.&quot;
  (file-exists? &q