Copy images to /tmp before booting QEMU
QEMU writes things back to images after booting. After doing
this, sometimes QEMU is unable to boot that image again. This
change makes a copy of the image and boots from the copy so
that we do not write anything back to the original image.
Change-Id: I541db5732d9e1cf6a5969ab5b9d54dffcbecf0dd
Signed-off-by: Charles Paul Hofer <Charles.Hofer@ibm.com>
diff --git a/scripts/boot-qemu.sh b/scripts/boot-qemu.sh
index f0a54f2..a7a9e62 100755
--- a/scripts/boot-qemu.sh
+++ b/scripts/boot-qemu.sh
@@ -72,6 +72,19 @@
DRIVE=$(ls ${DEFAULT_IMAGE_LOC}/qemuarm | grep rootfs.ext4)
fi
+# Copy the drive file off to /tmp so that QEMU does not write anything back
+# to the drive file and make it unusable for future QEMU runs.
+
+TMP_DRIVE_PATH=$(mktemp "/tmp/${DRIVE}-XXXXX")
+
+# The drive file is stored in different locations depending on if we are
+# using the default or real platforms.
+if [ ${MACHINE} = ${DEFAULT_MACHINE} ]; then
+ cp ${DEFAULT_IMAGE_LOC}/qemuarm/${DRIVE} ${TMP_DRIVE_PATH}
+else
+ cp ${DEFAULT_IMAGE_LOC}/${MACHINE}/${DRIVE} ${TMP_DRIVE_PATH}
+fi
+
# Obtain IP from /etc/hosts if IP is not valid set to localhost
IP=$(awk 'END{print $1}' /etc/hosts)
if [[ "$IP" != *.*.*.* ]]; then
@@ -87,7 +100,7 @@
-netdev user,id=mynet,hostfwd=tcp:${IP}:22-:22,hostfwd=tcp:${IP}:443-:443,hostfwd=tcp:${IP}:80-:80,hostfwd=tcp:${IP}:2200-:2200,hostfwd=udp:${IP}:623-:623,hostfwd=udp:${IP}:664-:664 \
-machine versatilepb \
-m 256 \
- -drive file=${DEFAULT_IMAGE_LOC}/qemuarm/${DRIVE},if=virtio,format=raw \
+ -drive file=${TMP_DRIVE_PATH},if=virtio,format=raw \
-show-cursor \
-usb \
-usbdevice tablet \
@@ -103,7 +116,7 @@
-m 256 \
-machine ${MACHINE}-bmc \
-nographic \
- -drive file=${DEFAULT_IMAGE_LOC}/${MACHINE}/${DRIVE},format=raw,if=mtd \
+ -drive file=${TMP_DRIVE_PATH},format=raw,if=mtd \
-net nic \
-net user,hostfwd=:${IP}:22-:22,hostfwd=:${IP}:443-:443,hostfwd=tcp:${IP}:80-:80,hostfwd=tcp:${IP}:2200-:2200,hostfwd=udp:${IP}:623-:623,hostfwd=udp:${IP}:664-:664,hostname=qemu
fi