raw image operations

config

@@ -49,10 +49,14 @@ base_packages=(bzip2 dialog apt-utils fakeroot e2fsprogs parted)
 # other system packages
 system_packages=(sysvinit ssh)
 
+# size of raw image file in MB
+imgsize=1337
+
 ## libdevuansdk-specific settings
 workdir="$H/workdir"
-strapdir="${workdir}/${os}-${release}-${version}-${arch}"
+strapdir="${workdir}/${os}-${release}-${version}"
 
 # declare zuper globals
 vars+=(os release version mirror section)
 vars+=(workdir strapdir)
+vars+=(imgsize)

doc/README-functions.md

@@ -7,8 +7,6 @@ libdevuansdk functions
 
 Main function, goes through stages 1, 2, and 3 of debootstrap.
 
-Other internal functions are prefixed with `config_` and `tar_`
-
 ### bootstrap_config_cleanup() ###
 
 Final cleanup of the rootfs.
@@ -25,6 +23,23 @@ Make a tarball of a base working system, ready to be worked on later.
 
 Unpack the tarball of a base working system to the strapdir.
 
+# zlibs/imaging
+
+## img_mkimage() ##
+Uses dd to dump zeroes into a raw .img of the preconfigured size.
+
+## img_partimage_dos() ##
+Partitions the raw image into dos format and formats (boot=ext2; root=ext4)
+
+## img_partimage_gpt() ##
+Partitions the raw image into gpt format and formats (boot=ext2; root=ext4)
+
+## img_mountimage() ##
+Mounts the root and boot partitions in `$workdir/rootp` in order to work on it.
+
+## img_umountimage() ##
+Undoes the above function.
+
 # zlibs/helpers
 
 ## escalate()
@@ -35,6 +50,10 @@ arguments, user and command in the style of:
 escalate root "chroot /somewhere/where/i/want/to"
 ```
 
+## findloopmapp()
+For the raw image. Finds a free loopdevice and makes a /dev/mapper device which
+is then kpartx-ed to give us partitions we can mount.
+
 ## mountdevproc()
 Mounts `/dev`, `/dev/pts`, and `/proc` where needed. Takes one argument, which
 is the path containing those. ex:
@@ -46,6 +65,9 @@ mountdevproc /path/to/bootstrapped/chroot
 ## umountdevproc()
 Does the opposite of `mountdevproc`.
 
+## silly()
+Because NSA
+
 # zlibs/sysconf
 NOTE: everything is printed to stdout. Pipe or redirect if you want to write on
 storage.

libdevuansdk

@@ -57,6 +57,7 @@ vars+=(R H E)
 source $E/config
 source $R/zlibs/debootstrap
 source $R/zlibs/helpers
+source $R/zlibs/imaging
 source $R/zlibs/sysconf
 
 # conclude initialization

zlibs/helpers

@@ -37,6 +37,23 @@ escalate() {
 	fi
 }
 
+findloopmapp() {
+	fn findloopmapp
+	req=(imgpath)
+	ckreq || return 1
+
+	loopdevice=`sudo losetup -f --show ${imgpath}`
+	mappdevice=`sudo kpartx -va $loopdevice | sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
+	func "Loop device:   ::1 loopdev::" $loopdevice
+	func "Mapper device: ::1 mappdev::" $mappdevice
+
+	silly sleep
+
+	mappdevice="/dev/mapper/${mappdevice}"
+	bootpart=${mappdevice}p1
+	rootpart=${mappdevice}p2
+}
+
 mountdevproc() {
 	fn mountdevproc $@
 	local mntdir="$1"
@@ -58,3 +75,44 @@ umountdevproc() {
 	escalate "root" "umount ${mntdir}/dev"  && act "unmounted /dev" && sleep 2
 	escalate "root" "umount ${mntdir}/proc" && act "unmounted /proc" && sleep 2
 }
+
+silly() {
+	fn silly
+
+	# cheers mailpile!
+	funneh=("do not think of purple hippos"
+		"increasing entropy & scrambling bits"
+		"indexing kittens..."
+		"patching bugs..."
+		"spinning violently around the y-axis"
+		"warming up particle accelerator"
+		"this server is powered by a lemon and two electrodes"
+		"becoming self-aware"
+		"BCC-ing ALL THE SPIES!"
+		"all of your config settings & passwords are encrypted with AES-256"
+		"the most common e-mail password is 123456, hopefully yours is different"
+		"good things come to those who wait"
+		"Make Free Software and be happy"
+		"We like volcanos, do you like volcanos?"
+		"Crossing out swear words..."
+		"Informing David Cameron of suspicious ac^H^H^H ... naaah :)"
+		"Abandon all hope, ye who enter here"
+		"Compiling bullshit bingo grid..."
+		"Estimating chance of asteroid hitting Earth"
+		"Applying coupons..."
+		"Backing up the entire Internet..."
+		"Making you wait for no reason"
+		"Doing nothing"
+		"Pay no attention to the man behind the curtain"
+		"You are great just the way you are"
+		"Supplying monkeys with typewriters"
+		"Swapping time and space"
+		"Self potato"
+		"Hey, there is some Nigerian prince here who wants to give you twenty million dollars..."
+		"A million hamsters are spinning their wheels right now")
+
+	local rnd=`shuf -i1-30 -n 1`
+	act "${funneh[$rnd]}"
+
+	[[ $1 == "sleep" ]] && sleep 4
+}

zlibs/imaging

@@ -0,0 +1,109 @@
+#!/usr/bin/env zsh
+#
+# Copyright (c) 2016 Dyne.org Foundation
+# libdevuansdk is written and maintained by
+#     Jaromil <jaromil@dyne.org>
+#     KatolaZ <katolaz@freaknet.org>
+#     parazyd <parazyd@dyne.org>
+#
+# This file is part of libdevuansdk
+#
+# This source code 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.
+#
+# This software 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 this source code. If not, see <http://www.gnu.org/licenses/>.
+
+## Imaging
+
+vars+=(imgname imgpath)
+
+img_mkimage() {
+	fn img_mkimage
+	imgpath=${strapdir}.img
+	req=(imgpath imgsize)
+	ckreq || return 1
+
+	imgname=`basename ${imgpath}`
+
+	notice "Creating raw image..."
+	dd if=/dev/zero \
+		of="${imgpath}" \
+		bs=1M count=${imgsize}
+}
+
+img_partimage_dos() {
+	fn img_partimage_dos
+	req=(imgname imgpath)
+	ckreq || return 1
+
+	notice "Partitioning with dos"
+
+	pushd ${workdir}
+
+	parted ${imgname} --script -- mklabel msdos
+	parted ${imgname} --script -- mkpart primary ${dos_boot_size}
+	parted ${imgname} --script -- mkpart primary ${dos_root_size}
+
+	# setup loopdevice and mappdevice (zlibs/helpers)
+	findloopmapp
+
+	notice "Formatting partitions..."
+	sudo mkfs.ext2 ${bootpart}
+	sudo mkfs.ext4 ${rootpart}
+
+	popd
+}
+
+img_partimage_gpt() {
+	fn img_partimage_gpt
+	req=(imgname imgpath)
+	ckreq || return 1
+
+	notice "Partitioning with gpt"
+
+	pushd ${workdir}
+
+	parted ${imgname} --script -- mklabel gpt
+	cgpt create -z ${imgname}
+	cgpt create ${imgname}
+	cgpt add -i 1 -t kernel -b 8192 -s 32768 -l kernel -S 1 -T 5 -P 10 ${imgname}
+	cgpt add -i 2 -t data -b 40960 -s `expr $(cgpt show ${imgname} \
+		| awk '/Sec GPT table/ {print \$1}') - 40960` -l Root ${imgname}
+
+	# setup loopdevice and mappdevice (zlibs/helpers)
+	findloopmapp
+
+	notice "Formatting partitions..."
+	sudo mkfs.ext2 -L bootfs $bootpart
+	sudo mkfs.ext4 -L rootfs $rootpart
+
+	popd
+}
+
+img_mountimage() {
+	fn img_mountimage
+	req=(bootpart rootpart workdir)
+	ckreq || return 1
+
+	mkdir -p ${workdir}/rootp
+
+	escalate root "mount ${rootpart} ${workdir}/rootp"      && act "mounted root partition"
+	escalate root "mount ${bootpart} ${workdir}/rootp/boot" && act "mounted root partition"
+}
+
+img_umountimage() {
+	fn img_umountimage
+	req=(bootpart rootpart workdir)
+	ckreq || return 1
+
+	escalate root "umount ${workdir}/rootp/boot" && act "umounted boot partition"
+	escalate root "umount ${workdir}/rootp"      && act "umounted root partition"
+}