New void-mkimage script to generate working images with a provided rootfs tarball.
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Juan RP
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mkimage.sh.in
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mkimage.sh.in
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#!/bin/sh
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#-
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# Copyright (c) 2013 Juan Romero Pardines.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#-
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readonly PROGNAME=$(basename $0)
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readonly ARCH=$(uname -m)
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trap 'printf "\nInterrupted! exiting...\n"; cleanup; exit 0' INT TERM HUP
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cleanup() {
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umount -f ${ROOTFSDIR}/boot 2>/dev/null
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umount -f ${ROOTFSDIR} 2>/dev/null
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[ -e "$LOOPDEV" ] && losetup -d $LOOPDEV 2>/dev/null
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[ -d "$ROOTFSDIR" ] && rmdir $ROOTFSDIR
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}
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info_msg() {
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printf "\033[1m$@\n\033[m"
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}
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die() {
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echo "FATAL: $@"
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exit 1
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}
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usage() {
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echo "Usage: $PROGNAME [-b fstype] [-o filename] [-r fstype] [-hV] <rootfs-tarball> [size]"
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echo
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echo " The <rootfs-tarball> argument expects a file generated by void-mkrootfs."
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echo " The <size> argument expects a number (GB). If <size> is not set, defaults to 2."
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echo
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echo "OPTIONS"
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echo " -b <fstype> Set /boot <fstype> (defaults to fat32, 256MB)"
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echo " -o <filename> Set output <filename>."
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echo " -r <fstype> Set / <fstype> (defaults to ext4, 256MB - <size>)"
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echo
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echo " Resulting image will have 2 partitions, /boot and / of total <size>."
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exit 0
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}
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#
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# main()
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#
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while getopts "b:o:r:hV" opt; do
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case $opt in
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b) BOOT_FSTYPE="$OPTARG";;
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o) FILENAME="$OPTARG";;
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r) ROOT_FSTYPE="$OPTARG";;
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V) echo "$PROGNAME @@MKLIVE_VERSION@@"; exit 0;;
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h) usage;;
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esac
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done
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shift $(($OPTIND - 1))
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ROOTFS_TARBALL="$1"
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if [ -z "$ROOTFS_TARBALL" ]; then
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usage
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elif [ ! -r "$ROOTFS_TARBALL" ]; then
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die "Cannot read rootfs tarball: $ROOTFS_TARBALL"
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fi
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if [ "$(id -u)" -ne 0 ]; then
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die "need root perms to continue, exiting."
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fi
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IMGSIZE="$2"
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if [ -z "$IMGSIZE" ]; then
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IMGSIZE="2G"
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else
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IMGSIZE="${2}G"
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fi
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if [ -z "$BOOT_FSTYPE" ]; then
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BOOT_FSTYPE="vfat"
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fi
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if [ -z "$ROOT_FSTYPE" ]; then
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ROOT_FSTYPE="ext4"
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fi
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if [ -z "$FILENAME" ]; then
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FILENAME="void-image-$(date +%Y%m%d).img"
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fi
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info_msg "Creating disk image ($IMGSIZE) ..."
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dd if=/dev/zero of=$FILENAME bs=$IMGSIZE count=1 conv=sparse >/dev/null 2>&1
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info_msg "Creating disk image partitions/filesystems ..."
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parted $FILENAME mktable msdos
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if [ "$BOOT_FSTYPE" = "vfat" ]; then
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_btype="fat32"
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fi
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parted $FILENAME mkpart primary ${_btype} 2048s 256M
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parted $FILENAME mkpart primary ${ROOT_FSTYPE} 256M 100%
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parted $FILENAME toggle 1 boot
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LOOPDEV=$(losetup --show --find -P $FILENAME)
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mkfs.${BOOT_FSTYPE} -F32 ${LOOPDEV}p1 >/dev/null 2>&1
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mkfs.${ROOT_FSTYPE} ${LOOPDEV}p2 >/dev/null 2>&1
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info_msg "Unpacking rootfs tarball ..."
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ROOTFSDIR=$(mktemp -d)
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mount ${LOOPDEV}p2 $ROOTFSDIR
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mkdir -p ${ROOTFSDIR}/boot
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mount ${LOOPDEV}p1 ${ROOTFSDIR}/boot
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tar xfp $ROOTFS_TARBALL -C $ROOTFSDIR
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BOOT_UUID=$(blkid -o value -s UUID ${LOOPDEV}p1)
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ROOT_UUID=$(blkid -o value -s UUID ${LOOPDEV}p2)
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echo "UUID=$BOOT_UUID /boot $BOOT_FSTYPE defaults 0 0" >> ${ROOTFSDIR}/etc/fstab
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echo "UUID=$ROOT_UUID / $ROOT_FSTYPE defaults 0 1" >> ${ROOTFSDIR}/etc/fstab
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umount ${ROOTFSDIR}/boot
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umount $ROOTFSDIR
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losetup -d $LOOPDEV
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rmdir $ROOTFSDIR
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chmod 644 $FILENAME
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info_msg "Successfully created $FILENAME image."
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# vim: set ts=4 sw=4 et:
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