Imported 2.678

No reason for CPC update specified.

debian/changelog

@@ -1,3 +1,14 @@
+livecd-rootfs (2.678) groovy; urgency=medium
+
+  [ David Krauser ]
+  * Add mechanism to detect initrdless boot fallback
+
+  [ Dimitri John Ledkov ]
+  * auto/build: use setup|teardown_mountpoint to reduce duplication
+  * functions: provide nss_systemd-less nsswitch.conf in chroots.
+
+ -- Dimitri John Ledkov <xnox@ubuntu.com>  Fri, 24 Jul 2020 21:08:07 +0100
+
 livecd-rootfs (2.677) groovy; urgency=medium
 
   * Avoid rbind /sys for chroot snap pre-seeding (cgroups fail to unmount)

live-build/auto/build

@@ -106,33 +106,17 @@ fi
 Setup_cleanup
 
 preinstall_snaps() {
-	lb chroot_resolv install
+	setup_mountpoint chroot
+
 	snap_prepare chroot
 
 	for snap in "$@"; do
 		SNAP_NO_VALIDATE_SEED=1 snap_preseed chroot "${snap}"
 	done
 
-	if [ ! -c /dev/mem ]; then
-		mknod -m 660 /dev/mem c 1 1
-		chown root:kmem /dev/mem
-	fi
-
-	mount --rbind /dev chroot/dev
-	mount --bind /sys chroot/sys
-	mount --bind /sys/kernel/security chroot/sys/kernel/security
-	mount --bind /proc chroot/proc
-	# Provide more up to date apparmor features, matching target kernel
-	mount -o bind /usr/share/livecd-rootfs/live-build/apparmor/generic chroot/sys/kernel/security/apparmor/features
-	mount -o bind /usr/share/livecd-rootfs/live-build/seccomp/generic.actions_avail chroot/proc/sys/kernel/seccomp/actions_avail
-
 	snap_validate_seed chroot
 
-	umount --recursive chroot/proc
+	teardown_mountpoint chroot
-	umount --recursive chroot/sys
-	umount --recursive chroot/dev
-
-	lb chroot_resolv remove
 }
 
 rm -f binary.success

live-build/functions

@@ -107,6 +107,8 @@ setup_mountpoint() {
     mount -t tmpfs none "$mountpoint/var/cache/apt"
     mv "$mountpoint/etc/resolv.conf" resolv.conf.tmp
     cp /etc/resolv.conf "$mountpoint/etc/resolv.conf"
+    mv "$mountpoint/etc/nsswitch.conf" nsswitch.conf.tmp
+    sed 's/systemd//g' nsswitch.conf.tmp > "$mountpoint/etc/nsswitch.conf"
     chroot "$mountpoint" apt-get update
 
 }
@@ -124,6 +126,7 @@ teardown_mountpoint() {
         umount $submount
     done
     mv resolv.conf.tmp "$mountpoint/etc/resolv.conf"
+    mv nsswitch.conf.tmp "$mountpoint/etc/nsswitch.conf"
 }
 
 mount_partition() {
@@ -962,6 +965,32 @@ replace_kernel () {
     force_boot_without_initramfs ${mountpoint}
 }
 
+track_initramfs_boot_fallback() {
+    mountpoint=$1
+    cat <<END > "${mountpoint}/etc/grub.d/01_track_initrdless_boot_fallback"
+#! /bin/sh
+# ${IMAGE_STR}
+# This will detect if we attempt to boot with an initramfs and fail.
+# In the case of a failure, initrdless_boot_fallback_triggered is set to
+# a non-zero value in the grubenv. This value can be checked after boot
+# by looking in /boot/grub/grubenv or by using the grub-editenv list command.
+set -e
+END
+    cat <<"END" >> "${mountpoint}/etc/grub.d/01_track_initrdless_boot_fallback"
+cat <<"EOF"
+if [ -n "${have_grubenv}" ]; then
+  if [ -n "${initrdfail}" ]; then
+    set initrdless_boot_fallback_triggered="${initrdfail}"
+  else
+    set initrdless_boot_fallback_triggered=0
+  fi
+  save_env initrdless_boot_fallback_triggered
+fi
+EOF
+END
+    chmod +x "${mountpoint}/etc/grub.d/01_track_initrdless_boot_fallback"
+}
+
 force_boot_without_initramfs() {
     mountpoint=$1
 

live-build/ubuntu-cpc/hooks.d/base/disk-image-uefi.binary

@@ -133,6 +133,7 @@ install_grub() {
     chroot mountpoint dpkg-query -W > binary/boot/filesystem.packages
 
     divert_grub mountpoint
+    track_initramfs_boot_fallback mountpoint
     chroot mountpoint update-grub
     replace_grub_root_with_label mountpoint
     undivert_grub mountpoint

live-build/ubuntu-cpc/hooks.d/base/disk-image.binary

@@ -119,6 +119,11 @@ if [ "${should_install_grub}" -eq 1 ]; then
         --device-map=/tmp/device.map \
         ${loop_device}
 
+    divert_grub mountpoint
+    track_initramfs_boot_fallback mountpoint
+    chroot mountpoint update-grub
+    undivert_grub mountpoint
+
     rm mountpoint/tmp/device.map
 fi