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Diffstat (limited to 'bin/sbuild-qemu-create-modscript')
| -rwxr-xr-x | bin/sbuild-qemu-create-modscript | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/bin/sbuild-qemu-create-modscript b/bin/sbuild-qemu-create-modscript new file mode 100755 index 0000000..0f139b5 --- /dev/null +++ b/bin/sbuild-qemu-create-modscript @@ -0,0 +1,137 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Copyright © 2020 Christian Kastner <ckk@debian.org> +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see +# <http://www.gnu.org/licenses/>. +# +####################################################################### + + +set -e +umask 0022 + + +VMROOT="$1" +if [ -z "$VMROOT" ] +then + echo "$0 expects the mounted root of the VM as first argument." >&2 + exit 1 +elif ! mountpoint -q "$VMROOT" +then + echo "$VMROOT is not a mountpoint." >&2 + exit 1 +fi + + +echo "### Customizing base image ###" + +if [ -n "$SQC_SKEL" ] +then + echo "Copying contents of $SQC_SKEL" + if [ ! -d "$SQC_SKEL" ] + then + echo "$SQC_SKEL is not a directory." >&2 + exit 1 + fi + cp -pr "$SQC_SKEL/." "$VMROOT/root" +fi + +if [ -n "$SQC_AUTH_KEYS" ] +then + echo "Copying $SQC_AUTH_KEYS to /root/.ssh/" + if [ ! -f "$SQC_AUTH_KEYS" ] + then + echo "$SQC_AUTH_KEYS is not a regular file." >&2 + exit 1 + fi + + TARGET_KEYS="$VMROOT/root/.ssh/authorized_keys" + if [ ! -d "$VMROOT/root/.ssh" ] + then + mkdir --mode=0700 "$VMROOT/root/.ssh" + fi + cp "$SQC_AUTH_KEYS" "$VMROOT/root/.ssh/authorized_keys" + chroot "$VMROOT" chmod 0600 /root/.ssh/authorized_keys + chroot "$VMROOT" chown root:root /root/.ssh/authorized_keys + chroot "$VMROOT" apt-get install --quiet --assume-yes openssh-server +fi + +if [ -n "$SQC_INSTALL_PACKAGES" ] +then + echo "Installing additional packages" + chroot "$VMROOT" apt-get install --quiet --assume-yes $SQC_INSTALL_PACKAGES +fi + +if [ -n "$SQC_EXTRA_DEBS" ] +then + echo "Installing extra .debs" + VMTMP=`mktemp -d -p "$VMROOT"` + cp -t "$VMTMP" $SQC_EXTRA_DEBS + chroot "$VMROOT" dpkg --recursive -i `basename "$VMTMP"` + chroot "$VMROOT" apt-get update + rm -rf "$VMTMP" +fi + +# Mount point for a shared folder, if the VM is launched with one +echo "Adding 9p to initramfs" +echo -e "9p\n9pnet\n9pnet_virtio" >> "$VMROOT/etc/initramfs-tools/modules" +chroot "$VMROOT" update-initramfs -u +echo "Adding shared folder to fstab" +mkdir -m 755 "$VMROOT/shared" +echo "sbuild-qemu /shared 9p trans=virtio,version=9p2000.L,auto,nofail 0 0" >> "$VMROOT/etc/fstab" + +echo "Updating GRUB menu" +echo "GRUB_TIMEOUT=1" >> "$VMROOT/etc/default/grub" +chroot "$VMROOT" update-grub + +# Enable automatically setting terminal rows/columns if the host passes us the +# params using -fw_cfg +echo "Creating script in /etc/profile.d/ to set terminal geometry to host" +cat > "$VMROOT/etc/profile.d/sbuild-qemu-terminal-settings.sh" <<"EOF" +#!/bin/sh +# Set VM tty rows/columns to host rows/columns +# +# This only works if the guest kernel was compiled with CONFIG_FW_CFG_FSYS, and +# the host rows/columns were passed on through QEMU using -fw_cfg. Regular +# users will also need permission to read this file (see the udev rule). + +ROWSFILE="/sys/firmware/qemu_fw_cfg/by_name/opt/sbuild-qemu/tty-rows/raw" +COLSFILE="/sys/firmware/qemu_fw_cfg/by_name/opt/sbuild-qemu/tty-cols/raw" + +DEB_HOST_ARCH="`dpkg-architecture -qDEB_HOST_ARCH`" +if [ "$DEB_HOST_ARCH" = "armhf" ] || [ "$DEB_HOST_ARCH" = "arm64" ] +then + TTY=/dev/ttyAMA0 +else + TTY=/dev/ttyS0 +fi + +if [ -f "$ROWSFILE" ] +then + stty -F "$TTY" rows `cat "$ROWSFILE"` +fi + +if [ -f "$COLSFILE" ] +then + stty -F "$TTY" cols `cat "$COLSFILE"` +fi +EOF + +# Makes the image significantly smaller +chroot "$VMROOT" apt-get --option Dir::Etc::SourceList=/dev/null --option Dir::Etc::SourceParts=/dev/null update +chroot "$VMROOT" apt-get clean + +echo "### Customization of base image complete. ###" |