Script to turn on or off the QEMU environment for PYNQ

qemu_on_off.sh

#!/bin/bash

# adjust the following 3 variables if needed
board="ZCU104"
pynq_path="/opt/builds/PYNQ_20180529"
image="${pynq_path}/sdbuild/output/ZCU104-2.5.img"

if [[ $(sudo losetup -a | head -c1 | wc -c) -ne 0 ]]; then
	echo "Image is mounted. Unmounting it..."
	mounted=1
else
	echo "Image is not mounted. Mounting it..."
	mounted=0
fi

if [[ ${mounted} -eq 0 ]]; then
	# mount images and drives
	mkdir -p ${pynq_path}/sdbuild/build/bionic.${board}
	./scripts/mount_image.sh ${image} \
		${pynq_path}/sdbuild/build/bionic.${board}
	sudo mount -o bind /proc ${pynq_path}/sdbuild/build/bionic.${board}/proc
	sudo mount -o bind /dev ${pynq_path}/sdbuild/build/bionic.${board}/dev
	sudo mount -o bind /run ${pynq_path}/sdbuild/build/bionic.${board}/run

	# create large tmp dir
	sudo mkdir -p ${pynq_path}/sdbuild/build/bionic.${board}/local/tmp
	sudo mount -o bind /tmp \
		${pynq_path}/sdbuild/build/bionic.${board}/local/tmp

else
	# unmount images and drives
	sudo umount -l ${pynq_path}/sdbuild/build/bionic.${board}/proc
	sudo umount -l ${pynq_path}/sdbuild/build/bionic.${board}/dev
	sudo umount -l ${pynq_path}/sdbuild/build/bionic.${board}/run
	sudo umount -l ${pynq_path}/sdbuild/build/bionic.${board}/local/tmp
	sudo umount ${pynq_path}/sdbuild/build/bionic.${board}/boot
	sudo umount ${pynq_path}/sdbuild/build/bionic.${board}
	sudo kpartx -d ${image}
fi

# Use bash command:
#
# $ sudo -E chroot /opt/builds/PYNQ_20180529/sdbuild/build/bionic.ZCU104 bash
#
# to log onto QEMU environment

# Use bash command:
#
# $ exit
#
# to log off QEMU