Add suport for QemuUserEmulation

images/linux/scripts/installers/qemu-user-emulation.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+################################################################################
+##  File:  qemu-user-emulation.sh
+##  Desc:  Installs qemu, binfmt-support and qemu-user-static
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/document.sh
+source $HELPER_SCRIPTS/apt.sh
+
+PACKAGES="qemu binfmt-support qemu-user-static"
+
+# Test to see if the software in question is already installed, if not install it
+echo "Checking to see if the installer script has already been run"
+if ! IsInstalled "$PACKAGES"; then
+    echo "Installing $PACKAGES"
+    apt-get install -y --no-install-recommends $PACKAGES
+else
+    echo "$PACKAGES are already installed"
+fi
+
+# Check if qemu emulation is enabled at least for arm
+if [ -r /proc/sys/fs/binfmt_misc/qemu-arm ] ; then
+    echo "qemu-arm-static is not registered in binfmt_misc"
+    exit 1
+fi
+
+# Check if fixed binary is enabled
+# Needed for running containers without /usr/bin/qemu-xxx-static in rootfs
+# https://www.kernel.org/doc/html/v4.14/admin-guide/binfmt-misc.html
+QEMU_ARM_FIX_BIN=$(cat /proc/sys/fs/binfmt_misc/qemu-arm | grep flags | grep F)
+if [ -z "$QEMU_ARM_FIX_BIN" ] ; then
+    echo "qemu static binary is lazy loaded by binfmt_misc"
+fi
+
+# Document what was added to the image
+echo "Lastly, documenting what we added to the metadata file"
+DocumentInstalledItem "QemuUserEmulation with $PACKAGES"