path: root/gnu/packages/linux.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2014 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2012 Nikita Karetnikov <nikita@karetnikov.org>
;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
;;;
;;; 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 linux)
  #:use-module ((guix licenses)
                #:hide (zlib))
  #:use-module (gnu packages)
  #:use-module ((gnu packages compression)
                #:renamer (symbol-prefix-proc 'guix:))
  #:use-module (gnu packages flex)
  #:use-module (gnu packages bison)
  #:use-module (gnu packages gperf)
  #:use-module (gnu packages libusb)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages pciutils)
  #:use-module (gnu packages bdb)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages python)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages gettext)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages pulseaudio)
  #:use-module (gnu packages attr)
  #:use-module (gnu packages xml)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages texinfo)
  #:use-module (gnu packages check)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system python)
  #:use-module (guix build-system trivial)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match))

(define-public (system->linux-architecture arch)
  "Return the Linux architecture name for ARCH, a Guix system name such as
\"x86_64-linux\"."
  (let ((arch (car (string-split arch #\-))))
    (cond ((string=? arch "i686") "i386")
          ((string-prefix? "mips" arch) "mips")
          ((string-prefix? "arm" arch) "arm")
          (else arch))))

(define (linux-libre-urls version)
  "Return a list of URLs for Linux-Libre VERSION."
  (list (string-append
         "http://linux-libre.fsfla.org/pub/linux-libre/releases/"
         version "-gnu/linux-libre-" version "-gnu.tar.xz")

        ;; XXX: Work around <http://bugs.gnu.org/14851>.
        (string-append
         "ftp://alpha.gnu.org/gnu/guix/mirror/linux-libre-"
         version "-gnu.tar.xz")

        ;; Maybe this URL will become valid eventually.
        (string-append
         "mirror://gnu/linux-libre/" version "-gnu/linux-libre-"
         version "-gnu.tar.xz")))

(define-public linux-libre-headers
  (let* ((version "3.3.8")
         (build-phase
          (lambda (arch)
            `(lambda _
               (setenv "ARCH" ,(system->linux-architecture arch))
               (format #t "`ARCH' set to `~a'~%" (getenv "ARCH"))

               (and (zero? (system* "make" "defconfig"))
                    (zero? (system* "make" "mrproper" "headers_check"))))))
         (install-phase
          `(lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (and (zero? (system* "make"
                                    (string-append "INSTALL_HDR_PATH=" out)
                                    "headers_install"))
                    (mkdir (string-append out "/include/config"))
                    (call-with-output-file
                        (string-append out
                                       "/include/config/kernel.release")
                      (lambda (p)
                        (format p "~a-default~%" ,version))))))))
   (package
    (name "linux-libre-headers")
    (version version)
    (source (origin
             (method url-fetch)
             (uri (linux-libre-urls version))
             (sha256
              (base32
               "0jkfh0z1s6izvdnc3njm39dhzp1cg8i06jv06izwqz9w9qsprvnl"))))
    (build-system gnu-build-system)
    (native-inputs `(("perl" ,perl)))
    (arguments
     `(#:modules ((guix build gnu-build-system)
                  (guix build utils)
                  (srfi srfi-1))
       #:phases (alist-replace
                 'build ,(build-phase (or (%current-target-system)
                                          (%current-system)))
                 (alist-replace
                  'install ,install-phase
                  (alist-delete 'configure %standard-phases)))
       #:tests? #f))
    (synopsis "GNU Linux-Libre kernel headers")
    (description "Headers of the Linux-Libre kernel.")
    (license gpl2)
    (home-page "http://www.gnu.org/software/linux-libre/"))))

(define-public module-init-tools
  (package
    (name "module-init-tools")
    (version "3.16")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "mirror://kernel.org/linux/utils/kernel/module-init-tools/module-init-tools-"
                   version ".tar.bz2"))
             (sha256
              (base32
               "0jxnz9ahfic79rp93l5wxcbgh4pkv85mwnjlbv1gz3jawv5cvwp1"))
             (patches
              (list (search-patch "module-init-tools-moduledir.patch")))))
    (build-system gnu-build-system)
    (arguments
     ;; FIXME: The upstream tarball lacks man pages, and building them would
     ;; require DocBook & co.  We used to use Gentoo's pre-built man pages,
     ;; but they vanished.  In the meantime, fake it.
     '(#:phases (alist-cons-before
                 'configure 'fake-docbook
                 (lambda _
                   (substitute* "Makefile.in"
                     (("^DOCBOOKTOMAN.*$")
                      "DOCBOOKTOMAN = true\n")))
                 %standard-phases)))
    (home-page "http://www.kernel.org/pub/linux/utils/kernel/module-init-tools/")
    (synopsis "Tools for loading and managing Linux kernel modules")
    (description
     "Tools for loading and managing Linux kernel modules, such as `modprobe',
`insmod', `lsmod', and more.")
    (license gpl2+)))

(define %boot-logo-patch
  ;; Linux-Libre boot logo featuring Freedo and a gnu.
  (origin
    (method url-fetch)
    (uri (string-append "http://www.fsfla.org/svn/fsfla/software/linux-libre/"
                        "lemote/gnewsense/branches/3.15/100gnu+freedo.patch"))
    (sha256
     (base32
      "1hk9swxxc80bmn2zd2qr5ccrjrk28xkypwhl4z0qx4hbivj7qm06"))))

(define (kernel-config system)
  "Return the absolute file name of the Linux-Libre build configuration file
for SYSTEM."
  (define (lookup file)
    (let ((file (string-append "gnu/packages/" file)))
      (search-path %load-path file)))

  (match system
    ("i686-linux"
     (lookup "linux-libre-i686.conf"))
    ("x86_64-linux"
     (lookup "linux-libre-x86_64.conf"))
    (_
     (error "unsupported architecture" system))))

(define-public linux-libre
  (let* ((version "3.15")
         (build-phase
          '(lambda* (#:key system inputs #:allow-other-keys #:rest args)
             ;; Apply the neat patch.
             (system* "patch" "-p1" "--batch"
                      "-i" (assoc-ref inputs "patch/freedo+gnu"))

             (let ((arch (car (string-split system #\-))))
               (setenv "ARCH"
                       (cond ((string=? arch "i686") "i386")
                             (else arch)))
               (format #t "`ARCH' set to `~a'~%" (getenv "ARCH")))

             (let ((build  (assoc-ref %standard-phases 'build))
                   (config (assoc-ref inputs "kconfig")))
               (copy-file config ".config")
               (chmod ".config" #o666)

               ;; Appending works even when the option wasn't in the
               ;; file.  The last one prevails if duplicated.
               (let ((port (open-file ".config" "a")))
                 (display (string-append "CONFIG_NET_9P=m\n"
                                         "CONFIG_NET_9P_VIRTIO=m\n"
                                         "CONFIG_VIRTIO_BLK=m\n"
                                         "CONFIG_VIRTIO_NET=m\n"
                                         ;; https://lists.gnu.org/archive/html/guix-devel/2014-04/msg00039.html
                                         "CONFIG_DEVPTS_MULTIPLE_INSTANCES=y\n"
                                         "CONFIG_VIRTIO_PCI=m\n"
                                         "CONFIG_VIRTIO_BALLOON=m\n"
                                         "CONFIG_VIRTIO_MMIO=m\n"
                                         "CONFIG_FUSE_FS=m\n"
                                         "CONFIG_CIFS=m\n"
                                         "CONFIG_9P_FS=m\n")
                          port)
                 (close-port port))

               (zero? (system* "make" "oldconfig"))

               ;; Call the default `build' phase so `-j' is correctly
               ;; passed.
               (apply build #:make-flags "all" args))))
         (install-phase
          `(lambda* (#:key inputs outputs #:allow-other-keys)
             (let* ((out    (assoc-ref outputs "out"))
                    (moddir (string-append out "/lib/modules"))
                    (mit    (assoc-ref inputs "module-init-tools")))
               (mkdir-p moddir)
               (for-each (lambda (file)
                           (copy-file file
                                      (string-append out "/" (basename file))))
                         (find-files "." "^(bzImage|System\\.map)$"))
               (copy-file ".config" (string-append out "/config"))
               (zero? (system* "make"
                               (string-append "DEPMOD=" mit "/sbin/depmod")
                               (string-append "MODULE_DIR=" moddir)
                               (string-append "INSTALL_PATH=" out)
                               (string-append "INSTALL_MOD_PATH=" out)
                               "modules_install"))))))
   (package
    (name "linux-libre")
    (version version)
    (source (origin
             (method url-fetch)
             (uri (linux-libre-urls version))
             (sha256
              (base32
               "125n04rwqmr3bm9slk62w6xcg355hx85rwv2x16nl6qki70hsick"))))
    (build-system gnu-build-system)
    (native-inputs `(("perl" ,perl)
                     ("bc" ,bc)
                     ("module-init-tools" ,module-init-tools)
                     ("patch/freedo+gnu" ,%boot-logo-patch)
                     ("kconfig" ,(kernel-config (or (%current-target-system)
                                                    (%current-system))))))
    (arguments
     `(#:modules ((guix build gnu-build-system)
                  (guix build utils)
                  (srfi srfi-1)
                  (ice-9 match))
       #:strip-flags '("--strip-all")
       #:phases (alist-replace
                 'build ,build-phase
                 (alist-replace
                  'install ,install-phase
                  (alist-delete 'configure %standard-phases)))
       #:tests? #f))
    (synopsis "100% free redistribution of a cleaned Linux kernel")
    (description
     "GNU Linux-Libre is a free (as in freedom) variant of the Linux kernel.
It has been modified to remove all non-free binary blobs.")
    (license gpl2)
    (home-page "http://www.gnu.org/software/linux-libre/"))))


;;;
;;; Pluggable authentication modules (PAM).
;;;

(define-public linux-pam
  (package
    (name "linux-pam")
    (version "1.1.6")
    (source
     (origin
      (method url-fetch)
      (uri (list (string-append "http://www.linux-pam.org/library/Linux-PAM-"
                                version ".tar.bz2")
                 (string-append "mirror://kernel.org/linux/libs/pam/library/Linux-PAM-"
                                version ".tar.bz2")))
      (sha256
       (base32
        "1hlz2kqvbjisvwyicdincq7nz897b9rrafyzccwzqiqg53b8gf5s"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("flex" ,flex)

       ;; TODO: optional dependencies
       ;; ("libxcrypt" ,libxcrypt)
       ;; ("cracklib" ,cracklib)
       ))
    (arguments
     '(;; Most users, such as `shadow', expect the headers to be under
       ;; `security'.
       #:configure-flags (list (string-append "--includedir="
                                              (assoc-ref %outputs "out")
                                              "/include/security"))

       ;; XXX: Tests won't run in chroot, presumably because /etc/pam.d
       ;; isn't available.
       #:tests? #f))
    (home-page "http://www.linux-pam.org/")
    (synopsis "Pluggable authentication modules for Linux")
    (description
     "A *Free* project to implement OSF's RFC 86.0.
Pluggable authentication modules are small shared object files that can
be used through the PAM API to perform tasks, like authenticating a user
at login.  Local and dynamic reconfiguration are its key features")
    (license bsd-3)))


;;;
;;; Miscellaneous.
;;;

(define-public psmisc
  (package
    (name "psmisc")
    (version "22.20")
    (source
     (origin
      (method url-fetch)
      (uri (string-append "mirror://sourceforge/psmisc/psmisc/psmisc-"
                          version ".tar.gz"))
      (sha256
       (base32
        "052mfraykmxnavpi8s78aljx8w87hyvpx8mvzsgpjsjz73i28wmi"))))
    (build-system gnu-build-system)
    (inputs `(("ncurses" ,ncurses)))
    (home-page "http://psmisc.sourceforge.net/")
    (synopsis
     "set of utilities that use the proc filesystem, such as fuser, killall, and pstree")
    (description
     "This PSmisc package is a set of some small useful utilities that
use the proc filesystem. We're not about changing the world, but
providing the system administrator with some help in common tasks.")
    (license gpl2+)))

(define-public util-linux
  (package
    (name "util-linux")
    (version "2.21")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://kernel.org/linux/utils/"
                                  name "/v" version "/"
                                  name "-" version ".2" ".tar.xz"))
              (sha256
               (base32
                "1rpgghf7n0zx0cdy8hibr41wvkm2qp1yvd8ab1rxr193l1jmgcir"))
              (patches (list (search-patch "util-linux-perl.patch")))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags '("--disable-use-tty-group"
                           "--enable-ddate")
       #:phases (alist-cons-after
                 'install 'patch-chkdupexe
                 (lambda* (#:key outputs #:allow-other-keys)
                   (let ((out (assoc-ref outputs "out")))
                     (substitute* (string-append out "/bin/chkdupexe")
                       ;; Allow 'patch-shebang' to do its work.
                       (("@PERL@") "/bin/perl"))))
                 %standard-phases)))
    (inputs `(("zlib" ,guix:zlib)
              ("ncurses" ,ncurses)))
    (native-inputs
     `(("perl" ,perl)))
    (home-page "https://www.kernel.org/pub/linux/utils/util-linux/")
    (synopsis "Collection of utilities for the Linux kernel")
    (description
     "util-linux is a random collection of utilities for the Linux kernel.")

    ;; Note that util-linux doesn't use the same license for all the
    ;; code.  GPLv2+ is the default license for a code without an
    ;; explicitly defined license.
    (license (list gpl3+ gpl2+ gpl2 lgpl2.0+
                   bsd-4 public-domain))))

(define-public procps
  (package
    (name "procps")
    (version "3.2.8")
    (source (origin
             (method url-fetch)
             (uri (string-append "http://procps.sourceforge.net/procps-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "0d8mki0q4yamnkk4533kx8mc0jd879573srxhg6r2fs3lkc6iv8i"))
             (patches (list (search-patch "procps-make-3.82.patch")))))
    (build-system gnu-build-system)
    (inputs `(("ncurses" ,ncurses)))
    (arguments
     '(#:phases (alist-replace
                 'configure
                 (lambda* (#:key outputs #:allow-other-keys)
                   ;; No `configure', just a single Makefile.
                   (let ((out (assoc-ref outputs "out")))
                     (substitute* "Makefile"
                       (("/usr/") "/")
                       (("--(owner|group) 0") "")
                       (("ldconfig") "true")
                       (("^LDFLAGS[[:blank:]]*:=(.*)$" _ value)
                        ;; Add libproc to the RPATH.
                        (string-append "LDFLAGS := -Wl,-rpath="
                                       out "/lib" value))))
                   (setenv "CC" "gcc"))
                 (alist-replace
                  'install
                  (lambda* (#:key outputs #:allow-other-keys)
                    (let ((out (assoc-ref outputs "out")))
                      (and (zero?
                            (system* "make" "install"
                                     (string-append "DESTDIR=" out)))

                           ;; Sanity check.
                           (zero?
                            (system* (string-append out "/bin/ps")
                                     "--version")))))
                  %standard-phases))

       ;; What did you expect?  Tests?
       #:tests? #f))
    (home-page "http://procps.sourceforge.net/")
    (synopsis "Utilities that give information about processes")
    (description
     "procps is the package that has a bunch of small useful utilities
that give information about processes using the Linux /proc file system.
The package includes the programs ps, top, vmstat, w, kill, free,
slabtop, and skill.")
    (license gpl2)))

(define-public usbutils
  (package
    (name "usbutils")
    (version "006")
    (source
     (origin
      (method url-fetch)
      (uri (string-append "mirror://kernel.org/linux/utils/usb/usbutils/"
                          "usbutils-" version ".tar.xz"))
      (sha256
       (base32
        "03pd57vv8c6x0hgjqcbrxnzi14h8hcghmapg89p8k5zpwpkvbdfr"))))
    (build-system gnu-build-system)
    (inputs
     `(("libusb" ,libusb)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://www.linux-usb.org/")
    (synopsis
     "Tools for working with USB devices, such as lsusb")
    (description
     "Tools for working with USB devices, such as lsusb.")
    (license gpl2+)))

(define-public e2fsprogs
  (package
    (name "e2fsprogs")
    (version "1.42.7")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://sourceforge/e2fsprogs/e2fsprogs-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "0ibkkvp6kan0hn0d1anq4n2md70j5gcm7mwna515w82xwyr02rfw"))))
    (build-system gnu-build-system)
    (inputs `(("util-linux" ,util-linux)))
    (native-inputs `(("pkg-config" ,pkg-config)
                     ("texinfo" ,texinfo)))    ; for the libext2fs Info manual
    (arguments
     '(#:phases (alist-cons-before
                 'configure 'patch-shells
                 (lambda _
                   (substitute* "configure"
                     (("/bin/sh (.*)parse-types.sh" _ dir)
                      (string-append (which "sh") " " dir
                                     "parse-types.sh")))
                   (substitute* (find-files "." "^Makefile.in$")
                     (("#!/bin/sh")
                      (string-append "#!" (which "sh")))))
                 %standard-phases)

       ;; FIXME: Tests work by comparing the stdout/stderr of programs, that
       ;; they fail because we get an extra line that says "Can't check if
       ;; filesystem is mounted due to missing mtab file".
       #:tests? #f))
    (home-page "http://e2fsprogs.sourceforge.net/")
    (synopsis "Creating and checking ext2/ext3/ext4 file systems")
    (description
     "This package provides tools for manipulating ext2/ext3/ext4 file systems.")
    (license (list gpl2                           ; programs
                   lgpl2.0                        ; libext2fs
                   x11))))                        ; libuuid

(define-public e2fsck/static
  (package
    (name "e2fsck-static")
    (version (package-version e2fsprogs))
    (build-system trivial-build-system)
    (source #f)
    (arguments
     `(#:modules ((guix build utils))
       #:builder
       (begin
         (use-modules (guix build utils)
                      (ice-9 ftw)
                      (srfi srfi-26))

         (let ((source (string-append (assoc-ref %build-inputs "e2fsprogs")
                                      "/sbin"))
               (bin    (string-append (assoc-ref %outputs "out") "/sbin")))
           (mkdir-p bin)
           (with-directory-excursion bin
             (for-each (lambda (file)
                         (copy-file (string-append source "/" file)
                                    file)
                         (remove-store-references file)
                         (chmod file #o555))
                       (scandir source (cut string-prefix? "fsck." <>))))))))
    (inputs `(("e2fsprogs" ,(static-package e2fsprogs))))
    (synopsis "Statically-linked fsck.* commands from e2fsprogs")
    (description
     "This package provides statically-linked command of fsck.ext[234] taken
from the e2fsprogs package.  It is meant to be used in initrds.")
    (home-page (package-home-page e2fsprogs))
    (license (package-license e2fsprogs))))

(define-public strace
  (package
    (name "strace")
    (version "4.7")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://sourceforge/strace/strace-"
                                 version ".tar.xz"))
             (sha256
              (base32
               "158iwk0pl2mfw93m1843xb7a2zb8p6lh0qim07rca6f1ff4dk764"))))
    (build-system gnu-build-system)
    (native-inputs `(("perl" ,perl)))
    (home-page "http://strace.sourceforge.net/")
    (synopsis "System call tracer for Linux")
    (description
     "strace is a system call tracer, i.e. a debugging tool which prints out a
trace of all the system calls made by a another process/program.")
    (license bsd-3)))

(define-public alsa-lib
  (package
    (name "alsa-lib")
    (version "1.0.27.1")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "ftp://ftp.alsa-project.org/pub/lib/alsa-lib-"
                   version ".tar.bz2"))
             (sha256
              (base32
               "0fx057746dj7rjdi0jnvx2m9b0y1lgdkh1hks87d8w32xyihf3k9"))
             (patches (list (search-patch "alsa-lib-mips-atomic-fix.patch")))))
    (build-system gnu-build-system)
    (home-page "http://www.alsa-project.org/")
    (synopsis "The Advanced Linux Sound Architecture libraries")
    (description
     "The Advanced Linux Sound Architecture (ALSA) provides audio and
MIDI functionality to the Linux-based operating system.")
    (license lgpl2.1+)))

(define-public alsa-utils
  (package
    (name "alsa-utils")
    (version "1.0.27.2")
    (source (origin
             (method url-fetch)
             (uri (string-append "ftp://ftp.alsa-project.org/pub/utils/alsa-utils-"
                                 version ".tar.bz2"))
             (sha256
              (base32
               "1sjjngnq50jv5ilwsb4zys6smifni3bd6fn28gbnhfrg14wsrgq2"))))
    (build-system gnu-build-system)
    (arguments
     ;; XXX: Disable man page creation until we have DocBook.
     '(#:configure-flags (list "--disable-xmlto"
                               (string-append "--with-udev-rules-dir="
                                              (assoc-ref %outputs "out")
                                              "/lib/udev/rules.d"))
       #:phases (alist-cons-before
                 'install 'pre-install
                 (lambda _
                   ;; Don't try to mkdir /var/lib/alsa.
                   (substitute* "Makefile"
                     (("\\$\\(MKDIR_P\\) .*ASOUND_STATE_DIR.*")
                      "true\n")))
                 %standard-phases)))
    (inputs
     `(("libsamplerate" ,libsamplerate)
       ("ncurses" ,ncurses)
       ("alsa-lib" ,alsa-lib)
       ("xmlto" ,xmlto)
       ("gettext" ,gnu-gettext)))
    (home-page "http://www.alsa-project.org/")
    (synopsis "Utilities for the Advanced Linux Sound Architecture (ALSA)")
    (description
     "The Advanced Linux Sound Architecture (ALSA) provides audio and
MIDI functionality to the Linux-based operating system.")

    ;; This is mostly GPLv2+ but a few files such as 'alsactl.c' are
    ;; GPLv2-only.
    (license gpl2)))

(define-public iptables
  (package
    (name "iptables")
    (version "1.4.16.2")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "http://www.netfilter.org/projects/iptables/files/iptables-"
                   version ".tar.bz2"))
             (sha256
              (base32
               "0vkg5lzkn4l3i1sm6v3x96zzvnv9g7mi0qgj6279ld383mzcws24"))))
    (build-system gnu-build-system)
    (arguments '(#:tests? #f))                    ; no test suite
    (home-page "http://www.netfilter.org/projects/iptables/index.html")
    (synopsis "Program to configure the Linux IP packet filtering rules")
    (description
     "iptables is the userspace command line program used to configure the
Linux 2.4.x and later IPv4 packet filtering ruleset.  It is targeted towards
system administrators.  Since Network Address Translation is also configured
from the packet filter ruleset, iptables is used for this, too.  The iptables
package also includes ip6tables.  ip6tables is used for configuring the IPv6
packet filter.")
    (license gpl2+)))

(define-public iproute
  (package
    (name "iproute2")
    (version "3.12.0")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "mirror://kernel.org/linux/utils/net/iproute2/iproute2-"
                   version ".tar.xz"))
             (sha256
              (base32
               "04gi11gh087bg2nlxhj0lxrk8l9qxkpr88nsiil23917bm3h1xj4"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                                ; no test suite
       #:make-flags (let ((out (assoc-ref %outputs "out")))
                      (list "DESTDIR="
                            (string-append "LIBDIR=" out "/lib")
                            (string-append "SBINDIR=" out "/sbin")
                            (string-append "CONFDIR=" out "/etc")
                            (string-append "DOCDIR=" out "/share/doc/"
                                           ,name "-" ,version)
                            (string-append "MANDIR=" out "/share/man")))
       #:phases (alist-cons-before
                 'install 'pre-install
                 (lambda _
                   ;; Don't attempt to create /var/lib/arpd.
                   (substitute* "Makefile"
                     (("^.*ARPDDIR.*$") "")))
                 %standard-phases)))
    (inputs
     `(("iptables" ,iptables)
       ("db4" ,bdb)))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("flex" ,flex)
       ("bison" ,bison)))
    (home-page
     "http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2")
    (synopsis
     "A collection of utilities for controlling TCP/IP networking and traffic control in Linux")
    (description
     "Iproute2 is a collection of utilities for controlling TCP/IP
networking and traffic with the Linux kernel.

Most network configuration manuals still refer to ifconfig and route as the
primary network configuration tools, but ifconfig is known to behave
inadequately in modern network environments.  They should be deprecated, but
most distros still include them.  Most network configuration systems make use
of ifconfig and thus provide a limited feature set.  The /etc/net project aims
to support most modern network technologies, as it doesn't use ifconfig and
allows a system administrator to make use of all iproute2 features, including
traffic control.

iproute2 is usually shipped in a package called iproute or iproute2 and
consists of several tools, of which the most important are ip and tc.  ip
controls IPv4 and IPv6 configuration and tc stands for traffic control.  Both
tools print detailed usage messages and are accompanied by a set of
manpages.")
    (license gpl2+)))

(define-public net-tools
  ;; XXX: This package is basically unmaintained, but it provides a few
  ;; commands not yet provided by Inetutils, such as 'route', so we have to
  ;; live with it.
  (package
    (name "net-tools")
    (version "1.60")
    (home-page "http://www.tazenda.demon.co.uk/phil/net-tools/")
    (source (origin
             (method url-fetch)
             (uri (string-append home-page "/" name "-"
                                 version ".tar.bz2"))
             (sha256
              (base32
               "0yvxrzk0mzmspr7sa34hm1anw6sif39gyn85w4c5ywfn8inxvr3s"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases (alist-cons-after
                 'unpack 'patch
                 (lambda* (#:key inputs #:allow-other-keys)
                   (define (apply-patch file)
                     (zero? (system* "patch" "-p1" "--batch"
                                     "--input" file)))

                   (let ((patch.gz (assoc-ref inputs "patch")))
                     (format #t "applying Debian patch set '~a'...~%"
                             patch.gz)
                     (system (string-append "gunzip < " patch.gz " > the-patch"))
                     (pk 'here)
                     (and (apply-patch "the-patch")
                          (for-each apply-patch
                                    (find-files "debian/patches"
                                                "\\.patch")))))
                 (alist-replace
                  'configure
                  (lambda* (#:key outputs #:allow-other-keys)
                    (let ((out (assoc-ref outputs "out")))
                      (mkdir-p (string-append out "/bin"))
                      (mkdir-p (string-append out "/sbin"))

                      ;; Pretend we have everything...
                      (system "yes | make config")

                      ;; ... except we don't have libdnet, so remove that
                      ;; definition.
                      (substitute* '("config.make" "config.h")
                        (("^.*HAVE_AFDECnet.*$") ""))))
                  %standard-phases))

       ;; Binaries that depend on libnet-tools.a don't declare that
       ;; dependency, making it parallel-unsafe.
       #:parallel-build? #f

       #:tests? #f                                ; no test suite
       #:make-flags (let ((out (assoc-ref %outputs "out")))
                      (list "CC=gcc"
                            (string-append "BASEDIR=" out)
                            (string-append "INSTALLNLSDIR=" out "/share/locale")
                            (string-append "mandir=/share/man")))))

    ;; Use the big Debian patch set (the thing does not even compile out of
    ;; the box.)
    (inputs `(("patch" ,(origin
                         (method url-fetch)
                         (uri
                          "http://ftp.de.debian.org/debian/pool/main/n/net-tools/net-tools_1.60-24.2.diff.gz")
                         (sha256
                          (base32
                           "0p93lsqx23v5fv4hpbrydmfvw1ha2rgqpn2zqbs2jhxkzhjc030p"))))))
    (native-inputs `(("gettext" ,gnu-gettext)))

    (synopsis "Tools for controlling the network subsystem in Linux")
    (description
     "This package includes the important tools for controlling the network
subsystem of the Linux kernel.  This includes arp, hostname, ifconfig,
netstat, rarp and route.  Additionally, this package contains utilities
relating to particular network hardware types (plipconfig, slattach) and
advanced aspects of IP configuration (iptunnel, ipmaddr).")
    (license gpl2+)))

(define-public libcap
  (package
    (name "libcap")
    (version "2.22")
    (source (origin
             (method url-fetch)

             ;; Tarballs used to be available from
             ;; <https://www.kernel.org/pub/linux/libs/security/linux-privs/>
             ;; but they never came back after kernel.org was compromised.
             (uri (string-append
                   "mirror://debian/pool/main/libc/libcap2/libcap2_"
                   version ".orig.tar.gz"))
             (sha256
              (base32
               "07vjhkznm82p8dm4w6j8mmg7h5c70lp5s9bwwfdmgwpbixfydjp1"))))
    (build-system gnu-build-system)
    (arguments '(#:phases (alist-delete 'configure %standard-phases)
                 #:tests? #f                      ; no 'check' target
                 #:make-flags (list "lib=lib"
                                    (string-append "prefix="
                                                   (assoc-ref %outputs "out"))
                                    "RAISE_SETFCAP=no")))
    (native-inputs `(("perl" ,perl)))
    (inputs `(("attr" ,attr)))
    (home-page "https://sites.google.com/site/fullycapable/")
    (synopsis "Library for working with POSIX capabilities")
    (description
     "libcap2 provides a programming interface to POSIX capabilities on
Linux-based operating systems.")

    ;; License is BSD-3 or GPLv2, at the user's choice.
    (license gpl2)))

(define-public bridge-utils
  (package
    (name "bridge-utils")
    (version "1.5")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://sourceforge/bridge/bridge-utils-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "12367cwqmi0yqphi6j8rkx97q8hw52yq2fx4k0xfclkcizxybya2"))))
    (build-system gnu-build-system)

    ;; The tarball lacks all the generated files.
    (native-inputs `(("autoconf" ,autoconf)
                     ("automake" ,automake)))
    (arguments
     '(#:phases (alist-cons-before
                 'configure 'bootstrap
                 (lambda _
                   (zero? (system* "autoreconf" "-vf")))
                 %standard-phases)
       #:tests? #f))                              ; no 'check' target

    (home-page
     "http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge")
    (synopsis "Manipulate Ethernet bridges")
    (description
     "Utilities for Linux's Ethernet bridging facilities.  A bridge is a way
to connect two Ethernet segments together in a protocol independent way.
Packets are forwarded based on Ethernet address, rather than IP address (like
a router).  Since forwarding is done at Layer 2, all protocols can go
transparently through a bridge.")
    (license gpl2+)))

(define-public libnl
  (package
    (name "libnl")
    (version "3.2.13")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://www.infradead.org/~tgr/libnl/files/libnl-"
                    version ".tar.gz"))
              (sha256
               (base32
                "1ydw42lsd572qwrfgws97n76hyvjdpanwrxm03lysnhfxkna1ssd"))))
    (build-system gnu-build-system)
    (native-inputs `(("flex" ,flex) ("bison" ,bison)))
    (home-page "http://www.infradead.org/~tgr/libnl/")
    (synopsis "NetLink protocol library suite")
    (description
     "The libnl suite is a collection of libraries providing APIs to netlink
protocol based Linux kernel interfaces.  Netlink is an IPC mechanism primarly
between the kernel and user space processes.  It was designed to be a more
flexible successor to ioctl to provide mainly networking related kernel
configuration and monitoring interfaces.")

    ;; Most files are LGPLv2.1-only, but some are GPLv2-only (like
    ;; 'nl-addr-add.c'), so the result is GPLv2-only.
    (license gpl2)))

(define-public powertop
  (package
    (name "powertop")
    (version "2.5")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "https://01.org/powertop/sites/default/files/downloads/powertop-"
             version ".tar.gz"))
       (sha256
        (base32
         "02rwqbpasdayl201v0549gbp2f82rd0hqiv3i111r7npanjhhb4b"))))
    (build-system gnu-build-system)
    (inputs
     ;; TODO: Add pciutils.
     `(("zlib" ,guix:zlib)
       ;; ("pciutils" ,pciutils)
       ("ncurses" ,ncurses)
       ("libnl" ,libnl)))
    (native-inputs
       `(("pkg-config" ,pkg-config)))
    (home-page "https://01.org/powertop/")
    (synopsis "Analyze power consumption on Intel-based laptops")
    (description
     "PowerTOP is a Linux tool to diagnose issues with power consumption and
power management.  In addition to being a diagnostic tool, PowerTOP also has
an interactive mode where the user can experiment various power management
settings for cases where the operating system has not enabled these
settings.")
    (license gpl2)))

(define-public aumix
  (package
    (name "aumix")
    (version "2.9.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://www.jpj.net/~trevor/aumix/releases/aumix-"
                    version ".tar.bz2"))
              (sha256
               (base32
                "0a8fwyxnc5qdxff8sl2sfsbnvgh6pkij4yafiln0fxgg6bal7knj"))))
    (build-system gnu-build-system)
    (inputs `(("ncurses" ,ncurses)))
    (home-page "http://www.jpj.net/~trevor/aumix.html")
    (synopsis "Audio mixer for X and the console")
    (description
     "Aumix adjusts an audio mixer from X, the console, a terminal,
the command line or a script.")
    (license gpl2+)))

(define-public iotop
  (package
    (name "iotop")
    (version "0.6")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "http://guichaz.free.fr/iotop/files/iotop-"
                           version ".tar.gz"))
       (sha256 (base32
                "1kp8mqg2pbxq4xzpianypadfxcsyfgwcaqgqia6h9fsq6zyh4z0s"))))
    (build-system python-build-system)
    (arguments
     ;; The setup.py script expects python-2.
     `(#:python ,python-2
       ;; There are currently no checks in the package.
       #:tests? #f))
    (native-inputs `(("python" ,python-2)))
    (home-page "http://guichaz.free.fr/iotop/")
    (synopsis
     "Displays the IO activity of running processes")
    (description
     "Iotop is a Python program with a top like user interface to show the
processes currently causing I/O.")
    (license gpl2+)))

(define-public fuse
  (package
    (name "fuse")
    (version "2.9.3")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/fuse/fuse-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "071r6xjgssy8vwdn6m28qq1bqxsd2bphcd2mzhq0grf5ybm87sqb"))))
    (build-system gnu-build-system)
    (inputs `(("util-linux" ,util-linux)))
    (arguments
     '(#:configure-flags (list (string-append "MOUNT_FUSE_PATH="
                                              (assoc-ref %outputs "out")
                                              "/sbin")
                               (string-append "INIT_D_PATH="
                                              (assoc-ref %outputs "out")
                                              "/etc/init.d")
                               (string-append "UDEV_RULES_PATH="
                                              (assoc-ref %outputs "out")
                                              "/etc/udev"))
      #:phases (alist-cons-before
                'build 'set-file-names
                (lambda* (#:key inputs #:allow-other-keys)
                  ;; libfuse calls out to mount(8) and umount(8).  Make sure
                  ;; it refers to the right ones.
                  (substitute* '("lib/mount_util.c" "util/mount_util.c")
                    (("/bin/(u?)mount" _ maybe-u)
                     (string-append (assoc-ref inputs "util-linux")
                                    "/bin/" maybe-u "mount")))
                  (substitute* '("util/mount.fuse.c")
                    (("/bin/sh")
                     (which "sh")))

                  ;; This hack leads libfuse to search for 'fusermount' in
                  ;; $PATH, where it may find a setuid-root binary, instead of
                  ;; trying solely $out/sbin/fusermount and failing because
                  ;; it's not setuid.
                  (substitute* "lib/Makefile"
                    (("-DFUSERMOUNT_DIR=[[:graph:]]+")
                     "-DFUSERMOUNT_DIR=\\\"/var/empty\\\"")))
                %standard-phases)))
    (home-page "http://fuse.sourceforge.net/")
    (synopsis "Support file systems implemented in user space")
    (description
     "As a consequence of its monolithic design, file system code for Linux
normally goes into the kernel itself---which is not only a robustness issue,
but also an impediment to system extensibility.  FUSE, for \"file systems in
user space\", is a kernel module and user-space library that tries to address
part of this problem by allowing users to run file system implementations as
user-space processes.")
    (license (list lgpl2.1                        ; library
                   gpl2+))))                      ; command-line utilities

(define-public unionfs-fuse
  (package
    (name "unionfs-fuse")
    (version "0.26")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://podgorny.cz/unionfs-fuse/releases/unionfs-fuse-"
                    version ".tar.xz"))
              (sha256
               (base32
                "0qpnr4czgc62vsfnmv933w62nq3xwcbnvqch72qakfgca75rsp4d"))))
    (build-system cmake-build-system)
    (inputs `(("fuse" ,fuse)))
    (arguments '(#:tests? #f))                    ; no tests
    (home-page "http://podgorny.cz/moin/UnionFsFuse")
    (synopsis "User-space union file system")
    (description
     "UnionFS-FUSE is a flexible union file system implementation in user
space, using the FUSE library.  Mounting a union file system allows you to
\"aggregate\" the contents of several directories into a single mount point.
UnionFS-FUSE additionally supports copy-on-write.")
    (license bsd-3)))

(define fuse-static
  (package (inherit fuse)
    (name "fuse-static")
    (source (origin (inherit (package-source fuse))
              (modules '((guix build utils)))
              (snippet
               ;; Normally libfuse invokes mount(8) so that /etc/mtab is
               ;; updated.  Change calls to 'mtab_needs_update' to 0 so that
               ;; it doesn't do that, allowing us to remove the dependency on
               ;; util-linux (something that is useful in initrds.)
               '(substitute* '("lib/mount_util.c"
                               "util/mount_util.c")
                  (("mtab_needs_update[[:blank:]]*\\([a-z_]+\\)")
                   "0")
                  (("/bin/")
                   "")))))))

(define-public unionfs-fuse/static
  (package (inherit unionfs-fuse)
    (synopsis "User-space union file system (statically linked)")
    (name (string-append (package-name unionfs-fuse) "-static"))
    (source (origin (inherit (package-source unionfs-fuse))
              (modules '((guix build utils)))
              (snippet
               ;; Add -ldl to the libraries, because libfuse.a needs that.
               '(substitute* "src/CMakeLists.txt"
                  (("target_link_libraries(.*)\\)" _ libs)
                   (string-append "target_link_libraries"
                                  libs " dl)"))))))
    (arguments
     '(#:tests? #f
       #:configure-flags '("-DCMAKE_EXE_LINKER_FLAGS=-static")))
    (inputs `(("fuse" ,fuse-static)))))

(define-public sshfs-fuse
  (package
    (name "sshfs-fuse")
    (version "2.5")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/fuse/sshfs-fuse-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0gp6qr33l2p0964j0kds0dfmvyyf5lpgsn11daf0n5fhwm9185z9"))))
    (build-system gnu-build-system)
    (inputs
     `(("fuse" ,fuse)
       ("glib" ,glib)))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (home-page "http://fuse.sourceforge.net/sshfs.html")
    (synopsis "Mount remote file systems over SSH")
    (description
     "This is a file system client based on the SSH File Transfer Protocol.
Since most SSH servers already support this protocol it is very easy to set
up: on the server side there's nothing to do; on the client side mounting the
file system is as easy as logging into the server with an SSH client.")
    (license gpl2+)))

(define-public numactl
  (package
    (name "numactl")
    (version "2.0.9")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "ftp://oss.sgi.com/www/projects/libnuma/download/numactl-"
                    version
                    ".tar.gz"))
              (sha256
               (base32
                "073myxlyyhgxh1w3r757ajixb7s2k69czc3r0g12c3scq7k3784w"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases (alist-replace
                 'configure
                 (lambda* (#:key outputs #:allow-other-keys)
                   ;; There's no 'configure' script, just a raw makefile.
                   (substitute* "Makefile"
                     (("^prefix := .*$")
                      (string-append "prefix := " (assoc-ref outputs "out")
                                     "\n"))
                     (("^libdir := .*$")
                      ;; By default the thing tries to install under
                      ;; $prefix/lib64 when on a 64-bit platform.
                      (string-append "libdir := $(prefix)/lib\n"))))
                 %standard-phases)

       #:make-flags (list
                     ;; By default the thing tries to use 'cc'.
                     "CC=gcc"

                     ;; Make sure programs have an RPATH so they can find
                     ;; libnuma.so.
                     (string-append "LDLIBS=-Wl,-rpath="
                                    (assoc-ref %outputs "out") "/lib"))

       ;; There's a 'test' target, but it requires NUMA support in the kernel
       ;; to run, which we can't assume to have.
       #:tests? #f))
    (home-page "http://oss.sgi.com/projects/libnuma/")
    (synopsis "Tools for non-uniform memory access (NUMA) machines")
    (description
     "NUMA stands for Non-Uniform Memory Access, in other words a system whose
memory is not all in one place.  The numactl program allows you to run your
application program on specific CPU's and memory nodes.  It does this by
supplying a NUMA memory policy to the operating system before running your
program.

The package contains other commands, such as numademo, numastat and memhog.
The numademo command provides a quick overview of NUMA performance on your
system.")
    (license (list gpl2                           ; programs
                   lgpl2.1))))                    ; library

(define-public kbd
  (package
    (name "kbd")
    (version "2.0.1")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://kernel.org/linux/utils/kbd/kbd-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0c34b0za2v0934acvgnva0vaqpghmmhz4zh7k0m9jd4mbc91byqm"))
              (modules '((guix build utils)))
              (snippet
               '(substitute* "tests/Makefile.in"
                  ;; The '%: %.in' rule incorrectly uses @VERSION@.
                  (("@VERSION@")
                   "[@]VERSION[@]")))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases (alist-cons-before
                 'build 'pre-build
                 (lambda* (#:key inputs #:allow-other-keys)
                   (let ((gzip  (assoc-ref %build-inputs "gzip"))
                         (bzip2 (assoc-ref %build-inputs "bzip2")))
                     (substitute* "src/libkeymap/findfile.c"
                       (("gzip")
                        (string-append gzip "/bin/gzip"))
                       (("bzip2")
                        (string-append bzip2 "/bin/bzip2")))))
                 %standard-phases)))
    (inputs `(("check" ,check)
              ("gzip" ,guix:gzip)
              ("bzip2" ,guix:bzip2)
              ("pam" ,linux-pam)))
    (native-inputs `(("pkg-config" ,pkg-config)))
    (home-page "ftp://ftp.kernel.org/pub/linux/utils/kbd/")
    (synopsis "Linux keyboard utilities and keyboard maps")
    (description
     "This package contains keytable files and keyboard utilities compatible
for systems using the Linux kernel.  This includes commands such as
'loadkeys', 'setfont', 'kbdinfo', and 'chvt'.")
    (license gpl2+)))

(define-public inotify-tools
  (package
    (name "inotify-tools")
    (version "3.13")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "mirror://sourceforge/inotify-tools/inotify-tools/"
                    version "/inotify-tools-" version ".tar.gz"))
              (sha256
               (base32
                "0icl4bx041axd5dvhg89kilfkysjj86hjakc7bk8n49cxjn4cha6"))))
    (build-system gnu-build-system)
    (home-page "http://inotify-tools.sourceforge.net/")
    (synopsis "Monitor file accesses")
    (description
     "The inotify-tools packages provides a C library and command-line tools
to use Linux' inotify mechanism, which allows file accesses to be monitored.")
    (license gpl2+)))

(define-public kmod
  (package
    (name "kmod")
    (version "17")
    (source (origin
              (method url-fetch)
              (uri
               (string-append "mirror://kernel.org/linux/utils/kernel/kmod/"
                              "kmod-" version ".tar.xz"))
              (sha256
               (base32
                "1yid3a9b64a60ybj66fk2ysrq5klnl0ijl4g624cl16y8404g9rv"))
              (patches (list (search-patch "kmod-module-directory.patch")))))
    (build-system gnu-build-system)
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("xz" ,guix:xz)
       ("zlib" ,guix:zlib)))
    (arguments
     `(#:tests? #f ; FIXME: Investigate test failures
       #:configure-flags '("--with-xz" "--with-zlib")))
    (home-page "https://www.kernel.org/")
    (synopsis "Kernel module tools")
    (description "kmod is a set of tools to handle common tasks with Linux
kernel modules like insert, remove, list, check properties, resolve
dependencies and aliases.

These tools are designed on top of libkmod, a library that is shipped with
kmod.  The aim is to be compatible with tools, configurations and indices
from the module-init-tools project.")
    (license gpl2+))) ; library under lgpl2.1+

(define-public udev
  (package
    (name "udev")
    (version "182")
    (source (origin
             (method url-fetch)
             (uri (string-append
                   "mirror://kernel.org/linux/utils/kernel/hotplug/udev-"
                   version ".tar.xz"))
             (sha256
              (base32
               "1awp7p07gi083w0dwqhhbbas68a7fx2sbm1yf1ip2jwf7cpqkf5d"))
             (patches (list (search-patch "udev-gir-libtool.patch")))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags (list (string-append
                                "--with-pci-ids-path="
                                (assoc-ref %build-inputs "pciutils")
                                "/share/pci.ids.gz")

                               "--with-firmware-path=/no/firmware"

                               ;; Work around undefined reference to
                               ;; 'mq_getattr' in sc-daemon.c.
                               "LDFLAGS=-lrt")))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("gperf" ,gperf)
       ("perl" ,perl)                             ; for the tests
       ("python" ,python-2)))                     ; ditto
    (inputs
     `(("kmod" ,kmod)
       ("pciutils" ,pciutils)
       ("usbutils" ,usbutils)
       ("util-linux" ,util-linux)
       ("glib" ,glib)
       ("gobject-introspection" ,gobject-introspection)))
    (home-page "http://www.freedesktop.org/software/systemd/libudev/")
    (synopsis "Userspace device management")
    (description "Udev is a daemon which dynamically creates and removes
device nodes from /dev/, handles hotplug events and loads drivers at boot
time.")
    (license gpl2+))) ; libudev is under lgpl2.1+