traw image operations - libdevuansdk - common library for devuan's simple distro kits
(HTM) git clone https://git.parazyd.org/libdevuansdk
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---
(DIR) commit 4e4f10ef42735c252d7ffc7fee7f3fb5b46863ed
(DIR) parent 8e1d14f13f2b0ab69401437f52b8f22c66548be4
(HTM) Author: parazyd <parazyd@dyne.org>
Date: Wed, 8 Jun 2016 18:29:00 +0200
raw image operations
Diffstat:
M config | 6 +++++-
M doc/README-functions.md | 26 ++++++++++++++++++++++++--
M libdevuansdk | 1 +
M zlibs/helpers | 58 ++++++++++++++++++++++++++++++
A zlibs/imaging | 109 +++++++++++++++++++++++++++++++
5 files changed, 197 insertions(+), 3 deletions(-)
---
(DIR) diff --git a/config b/config
t@@ -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)
(DIR) diff --git a/doc/README-functions.md b/doc/README-functions.md
t@@ -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.
t@@ -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()
t@@ -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:
t@@ -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.
(DIR) diff --git a/libdevuansdk b/libdevuansdk
t@@ -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
(DIR) diff --git a/zlibs/helpers b/zlibs/helpers
t@@ -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"
t@@ -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]}"
+
+ [[ $1 == "sleep" ]] && sleep 4
+}
(DIR) diff --git a/zlibs/imaging b/zlibs/imaging
t@@ -0,0 +1,109 @@
+#!/usr/bin/env zsh
+#
+# Copyright (c) 2016 Dyne.org Foundation
+# libdevuansdk is written and maintained by
+# Jaromil <jaromil@dyne.org>
+# KatolaZ <katolaz@freaknet.org>
+# parazyd <parazyd@dyne.org>
+#
+# This file is part of libdevuansdk
+#
+# This source code is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This software is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this source code. If not, see <http://www.gnu.org/licenses/>.
+
+## Imaging
+
+vars+=(imgname imgpath)
+
+img_mkimage() {
+ fn img_mkimage
+ imgpath=${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"
+}