script to install voidlinux on android/firefoxos devices via adb

void-android.sh

#!/bin/sh

# TODO
# - check free disk
# - check return values for every command

V=/data/void
DNS=8.8.8.8
URL=http://xbps.nopcode.org/rootfs/
ROOTFS=void-raspberrypi-rootfs-20191111.tar.xz

download() {
	if [ ! -f "$ROOTFS" ]; then
		wget -c ${URL}/${ROOTFS}
	fi
}

verify() {
	printf "Verify ARMv7 CPU...   "
	adb shell cat /proc/cpuinfo | grep -q ARMv7
	if [ $? = 0 ]; then
		echo OK
	else
		echo ERR
		exit 1
	fi
}

install() {
	printf "Installing helper scripts..."
	cat > void-enter.sh <<EOF
if [ ! -d /lib ]; then
	mount -o remount,rw /
	mkdir -p /lib
	(
		cd $V/lib
		for a in ld-* ; do
			echo ".. cp /lib/\$a"
			cat \$a > /lib/\$a
			chmod 755 /lib/\$a
		done
	)
	#mount -o remount,ro /
fi
export TMPDIR=/tmp
export HOME=/root
export XBPS_TARGET_ARCH=armv6l
export PATH=/bin/:/usr/bin:/sbin:/usr/sbin:$V/bin:$V/sbin:$V/usr/bin:$V/sbin:\$PATH
export LD_LIBRARY_PATH=$V/lib:$V/usr/lib:/lib
export PS1='[\$USER@\$HOSTNAME\${PWD:-?}]# '

mkdir -p $V/etc $V/tmp
echo nameserver ${DNS} > $V/etc/resolv.conf
grep -q aid_inet $V/etc/group || cat >> $V/etc/group <<FOO
inet:x:3003:root
aid_inet:x:3003:root
net_raw:x:3004:
FOO

case "\$1" in
shell|'')
if [ ! -f $V/proc/cpuinfo ]; then
	mkdir -p $V/rootfs
	for a in proc dev sys dev/pts dev/shm sdcard ; do
		echo ".. mount /\$a"
		mkdir -p $V/\$a
		mount -o bind /\$a $V/\$a
	done
	ln -s /proc/self/fd /dev/fd
fi
	;;
esac

case "\$1" in
install)
	mkdir $V
	gzip -d < /sdcard/void.tgz | tar xv -C $V
bash
	;;
umount)
	for a in dev/shm dev/pts proc dev sys sdcard ; do
		umount $V/\$a
	done
	;;
shell)
	echo "Network is not enabled in shell mode"
	$V/usr/bin/bash
	;;
*)
	# SU is necessary to gain aid_inet priviledges for networking
	chroot $V su -p -s /bin/bash
	;;
esac
EOF
	adb shell rm /data/void-enter.sh
	adb push void-enter.sh /data/void-enter.sh >/dev/null
	adb shell chmod 755 /data/void-enter.sh
	rm -f void-enter.sh
	echo DONE
}

bootstrap() {
	[ -z "`adb shell ls /data/void 2>/dev/null | grep "No such"`" ] && return
FILES="
./usr/bin/tar
./usr/bin/gzip
./usr/bin/grep
./usr/lib/ld-linux.so.3
./usr/lib/ld-2.17.so
./usr/lib/libpcre.so.1
./usr/lib/libgcc_s.so.1
./usr/lib/libc.so.6
./usr/lib/libc-2.17.so
"
	echo "Bootstrapping..."
	rm -rf void-out
	mkdir -p void-out
	(
		mkdir -p out/lib out/data/void
		tar xJvf ${ROOTFS} -C out/$V/ ${FILES}
		mv out/$V/usr/lib/ld-* out/lib
		find out
		adb shell "mkdir -p $V"
	)
	#rm -rf out
	if [ -n "`adb ls /sdcard/void.tgz 2>/dev/null | grep 'No such'`" ]; then
		echo "Repacking for gunzip... "
		xz -d < $ROOTFS | gzip > void.tgz
		echo "Copying rootfs into /sdcard..."
		adb push void.tgz /sdcard/void.tgz
	fi
	echo "Installing bootstrap to uncompress rootfs..."
	adb shell "mount -o remount,rw /"
	adb push out/ /
	echo "Uncompressing rootfs on target device..."
	adb shell "/data/void-enter.sh install"
}

shell() {
	echo "Type:"
	echo " /data/void-enter.sh"
	adb shell
	exit 1
	if [ -n "`adb shell ls /data/void/root 2>/dev/null | grep 'No such'`" ]; then
		echo "Cannot find void rootfs"
	else
		# XXX  console is busted wtf
		adb shell /data/void-enter.sh
	fi
}

# main
verify
download
bootstrap
install
shell