* gnu/build/linux-boot.scm (make-static-device-nodes): New variable.
(<device-node>): New variable.
(read-static-device-nodes): New variable.
(report-system-error): New variable.
(catch-system-error): New variable.
(create-device-node): New variable.
(mkdir-p*): New variable.
Co-Authored-By: Ludovic Courtès <ludo@gnu.org>
* gnu/bootloader/extlinux.scm (install-extlinux): Factorize bootloader
writing in a new procedure write-file-on-device defined in (gnu build
bootloader).
* gnu/build/bootloader.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add new file.
* gnu/system/vm.scm (qemu-img): Adapt to import and use (gnu build bootloader)
module during derivation building.
* gnu/scripts/system.scm (bootloader-installer-derivation): Ditto.
* gnu/build/vm.scm (load-in-linux-vm): New argument #:target-arm32.
Use it to adapt command for qemu-system-arm. This implies to choose a
machine ("virt"), use the correct console port "ttyAMA0", disable KVM use
that is buggy on some ARM boards (Odroid XU4 for example) and use user mode
network stack instead of NIC. Gather all those options in a new variable
"arch-specific-flags".
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Pass
to load-in-linux-vm "#:target-arm32?" argument.
* gnu/build/vm.scm (make-iso9660-image): Call
'populate-root-file-system' instead of a series of 'mkdir-p' calls. Add
/etc to the arguments of xorriso.
Fixes a regression introduced in
c828969036 whereby /etc would no longer be
created as a result of calling 'mark-as-not-killable'.
This would affect ISO images because 'make-iso9660-image' does not
create /etc by default. In particular, the ISO installation image as
created by the "iso-image-installer" test would fail to boot while
creating the /root/etc/mtab symlink:
<https://hydra.gnu.org/build/2352514/nixlog/9/raw>.
* gnu/build/linux-boot.scm (mount-root-file-system): Make sure /root/etc
exists.
Overlayfs is part of the kernel, while unionfs needs FUSE. This also reduces
the size of the initrd by ca. 4.3% (487K).
* gnu/build/linux-boot.scm (mount-root-file-system): Remove optional parameter
"unionfs"; mount using overlayfs instead of unionfs; new directory layout
requied by overlayfs; update documentation.
[mark-as-not-killable]: Remove now unused function
* gnu/system/linux-initrd.scm (file-system-packages): Remove now unused
packages "unionfs-fuse/static" and thus unused related 'if'.
(linux-modules): Replace "fuse" by "overlay".
Reported by Roel Janssen <roel@gnu.org>
at <https://lists.gnu.org/archive/html/help-guix/2017-09/msg00094.html>.
* gnu/system/file-systems.scm (file-system->spec): When DEVICE is a
UUID, serialize it in a way that preserves its type.
(spec->file-system): Adjust accordingly.
* gnu/build/file-systems.scm (canonicalize-device-spec): Add case for
when SPEC is 'uuid?'.
* gnu/build/file-systems.scm (mount-file-system): Rename 'spec' to 'fs'
and assume it's a <file-system>.
* gnu/build/linux-boot.scm (boot-system): Assume MOUNTS is a list of
<file-system> and adjust accordingly.
* gnu/build/linux-container.scm (mount-file-systems): Remove
'file-system->spec' call.
* gnu/services/base.scm (file-system-shepherd-service): Add
'spec->file-system' call. Add (gnu system file-systems) to 'modules'.
* gnu/system/linux-initrd.scm (raw-initrd): Use (gnu system
file-systems). Add 'spec->file-system' call for #:mounts.
* gnu/system/uuid.scm (uuid=?): New procedure.
* tests/uuid.scm ("uuid=?"): New test.
* gnu/build/file-systems.scm (partition-uuid-predicate)
(luks-partition-uuid-predicate): Use it instead of 'bytevector=?'.
* gnu/build/vm.scm (<partition>)[uuid]: New field.
(create-ext-file-system): Add #:uuid and honor it.
(create-fat-file-system): Add #:uuid.
(format-partition): Add #:uuid and honor it.
(initialize-partition): Honor the 'uuid' field of PARTITION.
* gnu/build/marionette.scm (wait-for-file): Add #:read parameter and
honor it.
* gnu/tests/base.scm (run-basic-test)["login on tty1"]: Use
'wait-for-file' instead of inline code.
This is used in the installation process, as the mountpoint for the target
filesystem.
* gnu/build/vm.scm (make-iso9660-image): Create /mnt within the generated ISO
image.
This mimics the functionality in the root-partition-initializer used in
creating the QEMU image. This helps when trying to run guix system init from
the generated ISO image.
* gnu/build/vm.scm (make-iso9660-image): Add support for registering closures.
Previously we'd use "sendkey P" instead of "sendkey shift-p", which had
no effect.
* gnu/build/marionette.scm (character->keystroke): New procedure.
(string->keystroke-commands): Use it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Add
#:single-file-output? and pass it to 'load-in-linux-vm'.
(iso9660-image): Pass #:single-file-output? to
'expression->derivation-in-linux-vm'.
* gnu/build/vm.scm (load-in-linux-vm): Add #:single-file-output? and
honor it.
* gnu/build/vm.scm (initialize-hard-disk): Use "GuixSD" as label.
* gnu/system/install.scm (installation-os): Use "GuixSD" as label.
* gnu/system/vm.scm (system-disk-image): Use "GuixSD" or "GUIXSD" as volume
label.
Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* build-aux/hydra/gnu-system.scm (qemu-jobs): Add 'iso9660-image .
* gnu/build/vm.scm (make-iso9660-image): New variable. Export it.
* gnu/system/vm.scm (iso9660-image): New variable. Use make-iso9660-image.
(system-disk-image): Use iso9660-image.
Fixes <https://bugs.gnu.org/27551>.
Reported by Leo Famulari <leo@famulari.name>.
This reinstates the following commits:
e3ddb1e83 * gnu: guile-cairo: Switch to Guile 2.2.
ae5c6ef39 * gnu: guile-gnome: Update to 2.16.5.
0fd8013fc * gnu: guile-rsvg: Update to commit 05c6a2fd.
66b9183c4 * gnu: guile-lib: Switch to Guile 2.2.
and adds the following changes:
* gnu/bootloader/grub.scm (svg->png): Add 'package->derivation' call for
GUILE-2.2. Pass #:guile-for-build to 'gexp->derivation'.
* gnu/build/svg.scm (svg->png): Add 'em' and 'ex' to the 'let-values'
form to account for all the values returned by
'rsvg-handle-get-dimensions', which Guile 2.2 does not truncate.
* gnu/build/vm.scm (estimated-partition-size): New procedure.
* gnu/system/vm.scm (expression->derivation-in-linux-vm):
Change #:disk-image-size default to 'guess.
[builder]: When DISK-IMAGE-SIZE is 'guess, use
'estimated-partition-size' and compute and estimate of the image size.
(qemu-image): Likewise.
* guix/build/store-copy.scm (file-size, closure-size): New procedures.
* guix/scripts/system.scm (%default-options): Change 'image-size' to
'guess.
* doc/guix.texi (Building the Installation Image): Remove '--image-size'
flag from example.
(Invoking guix system): Document the image size estimate.
* gnu/build/vm.scm (load-in-linux-vm): Add 'format' call when
MAKE-DISK-IMAGE? is true.
(initialize-partition-table): Show the size of the partitions being
created.
* gnu/build/marionette.scm (wait-for-file): New procedure.
* gnu/tests/base.scm (run-mcron-test)[test](wait-for-file): Remove.
Pass second argument in 'wait-for-file' calls.
* gnu/tests/ssh.scm (run-ssh-test)[test](wait-for-file): Remove.
Pass second argument in 'wait-for-file' calls.
* gnu/tests/messaging.scm (run-xmpp-test)[test](guest-wait-for-file):
Remove.
Use 'wait-for-file' instead, with second argument.
Trying to boot GuixSD when an audio CD is in the drive will die with an
"input/output error" when trying to read the superblock from the cd
drive.
This patch catches and warns in this case rather than dying.
* gnu/build/file-systems.scm (ENOENT-safe): Handle EIO.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Reported by Alex Griffin <a@ajgrf.com>.
Fixes <http://bugs.gnu.org/27135>.
* gnu/build/activation.scm (add-user): When UID is zero, add 'chmod'
call.
* gnu/tests/base.scm (run-basic-test)["permissions on /root"]: New test.
Fixes a bug whereby GuixSD would create the /nonexistent directory, from
user 'nobody', even though it has 'create-home-directory?' set to #f.
* gnu/build/activation.scm (activate-users+groups): Add comment for
\#:create-home?.
(activate-user-home)[ensure-user-home]: Skip when CREATE-HOME? is #f or
SYSTEM? is #t.
* gnu/tests/base.scm (run-basic-test)["no extra home directories"]: New
tests.
Previously a named socket such as /dev/log would fail
the 'regular-file?' test and we'd end up mkdir'ing it.
* gnu/build/file-systems.scm (regular-file?): Remove.
(mount-file-system): Change (regular-file? source)
to (not (file-is-directory? source)).
* gnu/build/vm.scm (define-module): Use module (guix build syscalls).
It fixes the following warnings during guix build :
gnu/build/vm.scm:233:3: warning: possibly unbound variable `mount'
gnu/build/vm.scm:238:3: warning: possibly unbound variable `umount'
gnu/build/vm.scm:268:8: warning: possibly unbound variable `mount'
gnu/build/vm.scm:276:8: warning: possibly unbound variable `umount'
gnu/build/vm.scm:315:4: warning: possibly unbound variable `mount'
gnu/build/vm.scm:323:4: warning: possibly unbound variable `umount'
This was not possible until the previous commit because we had to be sure
that Guile core implementation of 'mount' and 'umount' was used in
initrd context.
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix/scripts/pack.scm (self-contained-tarball): Add #:localstatedir?
parameter and honor it.
(%options, show-help): Add '--localstatedir'.
(guix-pack): Honor it.
* gnu/build/install.scm (populate-single-profile-directory): Add
#:register? parameter and honor it.
* doc/guix.texi (Binary Installation): Use '--localstatedir' in
example.
(Invoking guix pack): Document it.
* gnu/build/linux-container.scm (container-excursion*): New procedure.
* tests/containers.scm ("container-excursion*")
("container-excursion*, same namespaces"): New tests.
This avoids problems where 'isatty?' return #t but 'ttyname' fails with
ENOTTY or such.
* gnu/build/linux-container.scm (mount-file-systems): Remove call of
'isatty?'. Directly call 'ttyname' and catch 'system-error'.
This fixes a regression introduced in
ae763b5b0b whereby home directories and
skeletons would be root-owned.
* gnu/build/activation.scm (copy-account-skeletons): Make 'directory' a
keyword parameter. Add #:uid and #:gid and honor them.
[set-owner]: New procedure.
(activate-user-home): Add call to 'getpw' and 'chown'. Pass UID and GID
to 'copy-account-skeletons'.
* gnu/tests/base.scm (run-basic-test)["skeletons in home directories"]:
Test file ownership under HOME.
Fixes <http://bugs.gnu.org/21108>.
Reported by Andy Patterson <ajpatter@uwaterloo.ca>
and Leo Famulari <leo@famulari.name>.
* gnu/build/activation.scm (activate-users+groups)[activate-user]: Pass
#:create-home? #t iff CREATE-HOME? and SYSTEM?.
(activate-user-home): New procedure.
* gnu/system/shadow.scm (account-shepherd-service): New procedure.
(account-service-type)[extensions]: Add SHEPHERD-ROOT-SERVICE-TYPE
extension.
* gnu/tests/base.scm (run-basic-test)["home"]
["skeletons in home directories"]: New tests.
* gnu/tests/install.scm (%separate-home-os, %separate-home-os-source)
(%test-separate-home-os): New variables.
Fixes <http://bugs.gnu.org/25573>.
Reported by Alex Kost <alezost@gmail.com>.
* gnu/build/file-systems.scm (seek*): New procedure.
(read-superblock): Use it instead of 'seek' and ensure it returns
OFFSET.
* gnu/build/activation.scm (make-file-writable): Move this to ...
* guix/build/utils.scm (make-file-writable): ... here. Export it.
* guix/build/gnu-build-system.scm (strip): Use it.
* gnu/build/file-systems.scm (read-superblock,
null-terminated-latin1->string): New variables.
(sub-bytevector): Move to general section.
(ext2-superblock?, read-ext2-superblock): New variables.
(ext2-superblock-uuid, ext2-superblock-volume-name): Use
sub-bytevector and null-terminated-latin1->string.
(%ext2-sblock-magic, %ext2-sblock-creator-os, %ext2-sblock-uuid,
%ext2-sblock-volume-name): Inline constants.
(luks-superblock?, read-luks-header): New variables.
(%luks-header-size, %luks-magic): Inline.
(partition-label-predicate, partition-uuid-predicate,
luks-partition-uuid-predicate): Use new functions.
* gnu/packages/cross-base.scm (cross-gcc-arguments) <#:phases>: Use
'cross-gcc-build-phases', and move body cross-toolchain.scm.
(cross-gcc): Add #:imported-modules. Add (gnu build cross-toolchain) to
#:modules.
* gnu/build/cross-toolchain.scm: New file, with code from
'cross-gcc-arguments'.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
This allows 'grub-install' to do the right thing when / or /boot is a
LUKS-encrypted partition.
Fixes <http://bugs.gnu.org/21843>.
* gnu/build/install.scm (install-grub): Add 'setenv' to set
'GRUB_ENABLE_CRYPTODISK'.
(wait-for-screen-text): New test.
* gnu/tests/base.scm (run-basic-test): Add #:initialization parameter
and honor it.
* gnu/tests/install.scm (%encrypted-root-os)[kernel-arguments]: Remove.
(%encrypted-root-installation-script): Pass '--uuid' to 'cryptsetup
luksFormat'. Remove 'sed' invocation.
(enter-luks-passphrase): New procedure.
(%test-encrypted-os)[value]: Pass #:initialization to 'run-basic-test'.
* gnu/build/marionette.scm (<marionette>)[marionette-repl]: Rename to...
[%marionette-repl]: ... this.
(marionette-repl): New macro.
(make-marionette): Wrap last 'read' call into 'delay', making the last
argument to 'marionette' a promise of a port.
(marionette-eval): Use 'force' in 'match' clause.
* gnu/build/linux-container.scm (mount-file-systems): 'mounts' is now a
list of <file-system> objects instead of a list of lists ("specs").
Add call to 'file-system->spec' as the argument to 'mount-file-system'.
(run-container, call-with-container): Adjust docstring accordingly.
* gnu/system/file-systems.scm (spec->file-system): New procedure.
* gnu/system/linux-container.scm (container-script)[script]: Call
'spec->file-system' inside gexp.
* guix/scripts/environment.scm (launch-environment/container): Remove
call to 'file-system->spec'.
* tests/containers.scm ("call-with-container, mnt namespace")
("call-with-container, mnt namespace, wrong bind mount"): Pass a list of
<file-system> objects.
Previously, partitions of mdadm- or cryptsetup-produced block devices
would not be returned by 'disk-partitions'.
* gnu/build/file-systems.scm (disk-partitions)[last-character]: New
procedure.
[partition?]: Add 'name' parameter and rewrite. Adjust caller.
* gnu/build/file-systems.scm (ENOENT-safe): Silently ignore ENOMEDIUM.
Fixes compilation by 'guix pull' where Guile-{RSVG,Cairo} are missing.
Reported by Efraim Flashner.
* gnu/build/svg.scm: Use 'module-autoload!' rather than 'module-use!'.
Based on a suggestion by Andy Wingo at
<https://lists.gnu.org/archive/html/guix-devel/2015-08/msg00753.html>.
* gnu/build/svg.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu/system/grub.scm (svg->png): Add #:width and #:height. Rewrite to
use (gnu build svg).
(resize-image): Remove.
(grub-background-image): Adjust accordingly.
Before that, 'container-excursion' would call 'setns' even when the
target namespace is the one the caller is already in, which would fail.
* gnu/build/linux-container.scm (container-excursion): Introduce
'source' and 'target'. Compare the result of 'readlink' on these
instead of comparing file descriptors to decide whether to call
'setns'.
* tests/containers.scm ("container-excursion, same namespace"): New test.
Fixes <http://bugs.gnu.org/23306>.
* gnu/build/linux-container.scm (run-container): Use 'socketpair'
instead of 'pipe'. Rename 'in' to 'child' and 'out' to 'parent'. Send
a 'ready message or an exception argument list from the child to the
parent; adjust the parent accordingly.
* tests/containers.scm ("call-with-container, mnt namespace, wrong bind
mount"): New test.
* tests/guix-environment-container.sh: Add test with
--expose=/does-not-exist.
* gnu/build/file-systems.scm (%luks-endianness, %luks-header-size): New
macros.
(%luks-magic): New variable.
(sub-bytevector, read-luks-header, luks-header-uuid): New procedures.
(partition-predicate): Add 'read' parameter; wrap it with 'ENOENT-safe'.
Use it instead of 'read-ext2-superblock*'.
(read-ext2-superblock*): Remove.
(partition-label-predicate, partition-uuid-predicate): Pass
'read-ext2-superblock' as the first argument.
(partition-luks-uuid-predicate): New variable.
(find-partition-by-luks-uuid): New procedure.
Fixes <http://bugs.gnu.org/22633>.
* gnu/build/vm.scm (load-in-linux-vm): Only pass "-enable-kvm" flag to qemu
if "/dev/kvm" is present.
* gnu/system/vm.scm (common-kvm-options): Same as above.
* gnu/build/linux-container.scm (unprivileged-user-namespace-supported?): Only
read and check the first character, to cope with a possible newline in the
(pseudo-)file.
* gnu/build/file-systems.scm (canonicalize-device-spec)[canonical-title]:
Use 'string->uuid' to check whether SPEC is a UUID.
When SPEC is a string and CANONICAL-TITLE is 'uuid, call 'string->uuid'.
* gnu/system.scm (operating-system-grub.cfg): Add 'root-device'
variable and use it for the "--root=" argument.
* gnu/build/linux-container.scm (namespaces->bit-mask): Remove
CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID, which are unneeded.
Discussed at <http://bugs.gnu.org/21694>.
Reported by David Thompson <dthompson2@worcester.edu>
at <https://lists.gnu.org/archive/html/guix-devel/2015-10/msg00284.html>.
* gnu/build/file-systems.scm (mount-file-system): When SOURCE matches
'regular-file?', do not create MOUNT-POINT if it already exists. This
fixes a bug whereby we would be truncating MOUNT-POINT if it already
existed.
Before, call-with-clean-exit would *always* return an exit code of 1.
* gnu/build/linux-container.scm (call-with-clean-exit): Exit with status
code of 0 if thunk does not throw an exception.
* tests/containers.scm: Add test.
Suggested by Petter <petter@mykolab.ch>
and Mark H Weaver <mhw@netris.org>.
Reported by Duncan Keall <duncan@duncankeall.com>.
Partly fixes <http://bugs.gnu.org/19190> by populating /dev/mapper
early enough.
* gnu/build/linux-boot.scm (mount-essential-file-systems): Mount /dev as
a devtmpfs.
(move-essential-file-systems): Add /dev.
(mount-root-file-system): Mount /rw-root/dev as a devtmpfs instead of
calling 'make-essential-device-nodes'.
(boot-system): Remove call to 'make-essential-device-nodes'.
* gnu/system/file-systems.scm (%devtmpfs-file-system): Remove.
* doc/guix.texi (File Systems): Adjust accordingly.
The intent is to make 'clone' behave a lot more like 'primitive-fork', which
calls clone(2) with SIGCHLD, CLONE_CHILD_CLEARTID, and CLONE_CHILD_SETTID
flags. Notably, running 'clone' at the REPL without these flags would break
the REPL beyond repair.
* guix/build/syscalls.scm (CLONE_CHILD_CLEARTID, CLONE_CHILD_SETTID): New
variables.
* gnu/build/linux-container.scm (namespaces->bit-mask): Add
CLONE_CHILD_CLEARTID and CLONE_CHILD_SETTID to bit mask.
It's not always possible to map 65536 uids when creating a container as the
root user within another user namespace. This is true when building Guix
within the build daemon's container. By using a uid range of 1 by default,
even as the root user, the tests now pass.
* gnu/build/linux-container.scm (initialize-user-namespace, run-container):
Add 'host-uids' argument.
(call-with-container): Add #:host-uids keyword argument.
* tests/containers.scm ("container-excursion"): Update 'run-container' call.
* gnu/build/file-systems.scm (regular-file?): New procedure.
(mount-file-system): Create a regular file instead of a directory when bind
mounting a regular file.
* gnu/build/vm.scm (<partition>): New record type.
(fold2): New procedure.
(initialize-partition-table): Remove #:bootable? and
'partition-size' parameters. Add 'partitions' parameter. Invoke 'parted'
with '--script'.
(initialize-root-partition): Remove.
(initialize-partition, root-partition-initializer): New procedures.
(initialize-hard-disk): Remove #:system-directory, #:disk-image-size,
#:file-system-type, #:file-system-label, #:closures, #:copy-closures?,
#:bootable?, and #:register-closures? parameters. Add #:partitions.
Rewrite to use 'initialize-partition' for each item of PARTITIONS.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Add (guix records)
to #:modules default value.
(qemu-image): Adjust accordingly.
* gnu/build/vm.scm (initialize-root-partition, initialize-hard-disk): Use the
'umount' procedure instead of invoking the 'umount' command.
* gnu/system/vm.scm (qemu-image): Remove UTIL-LINUX from INPUTS.
* gnu/build/file-systems.scm (read-ext2-superblock*, partition-predicate): New
procedures.
(partition-label-predicate): Rewrite in terms of 'partition-predicate'.
(partition-uuid-predicate, find-partition-by-uuid, uuid->string): New
procedures.
(%network-byte-order): New macro.
(canonicalize-device-spec)[canonical-title]: Check whether SPEC is a string.
[resolve]: New procedure.
Add 'uuid' case and use it.
* gnu/build/linux-container.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.
* .dir-locals.el: Add Scheme indent rules for 'call-with-container', and
'container-excursion'.
* tests/containers.scm: New file.
* Makefile.am (SCM_TESTS): Add it.
* gnu/build/file-systems.scm: Import (guix build syscalls) when 'mount' is not
defined.
* gnu/system.scm (operating-system-activation-script): Include (guix build
syscalls) module in derivation.
* gnu/build/linux-initrd.scm (write-cpio-archive): Remove 'open-pipe*' and
related calls. Compute list of files in 'files' variable. Use
'cpio:write-cpio-archive'. Remove #:cpio parameter.
(build-initrd): Remove #:cpio parameter.
* gnu/system/linux-initrd.scm (expression->initrd): Likewise, and adjust
BUILDER accordingly. Add (guix cpio) to #:modules.
Rather than expecting a pointer, the version of 'mount' in
guile-static-stripped now takes a string for the 'options' argument, just like
the 'mount' procedure in (guix build syscalls).
* gnu/packages/patches/guile-linux-syscalls.patch (mount): Expect a string or
#f for 'options' argument.
* gnu/build/file-systems.scm (mount-file-system): Use new 'mount' interface.
* gnu/build/install.scm (populate-root-file-system): Delete system-1-link
under TARGET, not under /. Use 'catch' and check for EEXIST instead of
(false-if-exception (delete-file ...)).
* gnu/build/file-systems.scm (MS_REMOUNT): New constant.
(mount-file-system): Add 'flags' local variable. When FLAGS has
MS_BIND & MS_RDONLY, call 'mount' with MS_REMOUNT.
* gnu/services/base.scm (file-system-service) <start>: Likewise.
Suggested by Pjotr Prins <pjotr.public12@thebird.nl>
at <http://lists.gnu.org/archive/html/guix-devel/2015-04/msg00229.html>.
* gnu/build/install.scm (populate-single-profile-directory): New procedure.
* gnu/system/install.scm (self-contained-tarball): New procedure.
* Makefile.am (guix-binary.%.tar.xz): New target.
Fixes <http://bugs.gnu.org/19795>.
Reported by David Thompson <dthompson2@worcester.edu>.
* gnu/build/activation.scm (enumerate, current-users, current-groups,
delete-user, delete-group): New procedures.
(activate-users+groups): Add calls to 'delete-user' and
'delete-group'.
* doc/guix.texi (User Accounts): Add a paragraph about statelessness.
Explain that passwords are preserved.
Danny Milosavljevic