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-rwxr-xr-xdebian/tests/utils/mkinitramfs159
1 files changed, 159 insertions, 0 deletions
diff --git a/debian/tests/utils/mkinitramfs b/debian/tests/utils/mkinitramfs
new file mode 100755
index 0000000..6bc70f4
--- /dev/null
+++ b/debian/tests/utils/mkinitramfs
@@ -0,0 +1,159 @@
+#!/bin/sh
+
+# Generate an initramfs image, much like mkinitramfs(8) but simpler
+#
+# Copyright © 2021-2022 Guilhem Moulin <guilhem@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 3 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 -eu
+PATH="/usr/sbin:/usr/bin:/sbin:/bin"
+export PATH
+
+unset DEBUG
+EXTRACT_DIR="$1"
+KERNEL_VERSION="$2"
+INITRD="$3"
+
+UTILS="$(dirname -- "$0")"
+DESTDIR="$(mktemp --directory -- "$INITRD.XXXXXXXXXX")"
+trap "rm -r${DEBUG:+v}f -- \"$DESTDIR\"" EXIT INT TERM
+
+# from /usr/sbin/mkinitramfs: create usr-merged filesystem layout, to
+# avoid duplicates if the host filesystem is usr-merged
+for d in /bin /lib* /sbin; do
+ [ -d "$d" ] || continue
+ mkdir -p "$DESTDIR/usr$d"
+ ln -sT "usr$d" "$DESTDIR$d"
+done
+
+install -m0755 "$UTILS/init" "$DESTDIR/init"
+install -m0755 "$UTILS/debootstrap" "$DESTDIR/debootstrap"
+cat >"$DESTDIR/init.conf" <<- EOF
+ HOSTNAME="$TESTNAME"
+ export HOSTNAME
+ PACKAGES="$PACKAGES"
+ BOOT="$BOOT"
+ CONSOLE="$CONSOLE"
+ ARCH="$ARCH"
+ MERGED_USR="$MERGED_USR"
+EOF
+
+for p in setup preinst postinst bottom; do
+ # setup: sourced after creating the BIOS or EFI boot partition
+ # preinst: run in chroot after debootstrap, but before installing extra packages
+ # postinst: optionally run in chroot after installing extra packages
+ # bottom: last thing to run before shutdown
+ if [ -f "$TESTDIR/$TESTNAME.d/$p" ]; then
+ install -m0755 "$TESTDIR/$TESTNAME.d/$p" "$DESTDIR/init.$p"
+ fi
+done
+
+MODULES="dm_crypt ext4 btrfs raid0 raid1"
+if [ "$BOOT" = "efi" ]; then
+ MODULES="$MODULES efivarfs nls_ascii nls_cp437 vfat"
+fi
+
+depmod -ab "$EXTRACT_DIR" "$KERNEL_VERSION"
+for kmod in virtio_console virtio_blk virtio_pci virtio_rng \
+ "$EXTRACT_DIR/lib/modules/$KERNEL_VERSION"/kernel/arch/*/crypto/*.ko* \
+ "$EXTRACT_DIR/lib/modules/$KERNEL_VERSION"/kernel/crypto/*.ko* \
+ $MODULES; do
+ kmod="${kmod##*/}"
+ modprobe -aid "$EXTRACT_DIR" -S "$KERNEL_VERSION" --show-depends "${kmod%%.*}"
+done | while read -r insmod kmod _; do
+ [ "$insmod" = "insmod" ] || continue
+ kmod_rel="${kmod#"$EXTRACT_DIR/lib/modules/$KERNEL_VERSION/"}"
+ if [ ! -f "$kmod" ] || [ "${kmod_rel#kernel/}" = "$kmod_rel" ]; then
+ echo "Error: Unexpected modprobe output: $insmod $kmod" >&2
+ exit 1
+ fi
+ mkdir -p "$DESTDIR/lib/modules/$KERNEL_VERSION/${kmod_rel%/*}"
+ ln -f${DEBUG:+v}T -- "$kmod" "$DESTDIR/lib/modules/$KERNEL_VERSION/$kmod_rel"
+done
+
+ln -t "$DESTDIR/lib/modules/$KERNEL_VERSION" -- \
+ "$EXTRACT_DIR/lib/modules/$KERNEL_VERSION/modules.order" \
+ "$EXTRACT_DIR/lib/modules/$KERNEL_VERSION/modules.builtin"
+depmod -wab "$DESTDIR" "$KERNEL_VERSION"
+
+verbose="${DEBUG-}"
+. /usr/share/initramfs-tools/hook-functions # for copy_exec()
+if [ -f "$TESTDIR/$TESTNAME.d/mkinitramfs" ]; then
+ . "$TESTDIR/$TESTNAME.d/mkinitramfs"
+fi
+
+copy_exec /bin/cp
+copy_exec /bin/rm
+copy_exec /bin/chmod
+
+copy_exec /sbin/modprobe
+copy_exec /sbin/blkid
+copy_exec /sbin/sfdisk
+copy_exec /sbin/mkswap
+copy_exec /sbin/swapon
+copy_exec /sbin/swapoff
+copy_exec /sbin/cryptsetup
+copy_exec /sbin/dmsetup
+copy_exec /usr/bin/dpkg-deb
+copy_exec /bin/tar
+
+# assume ossl-modules/legacy.so and libgcc_s.so are relative to the linked libcryptsetup.so
+libdir="$(env --unset=LD_PRELOAD ldd /sbin/cryptsetup | sed -nr '/.*=>\s*(\S+)\/libcryptsetup\.so\..*/ {s//\1/p;q}')"
+copy_exec "$libdir/ossl-modules/legacy.so" || true
+copy_libgcc "$libdir"
+
+for p in /sbin/cryptsetup /sbin/lvm /sbin/mdadm /sbin/mke2fs /sbin/mkfs.btrfs /bin/btrfs; do
+ if [ -x "$p" ]; then
+ copy_exec "$p"
+ fi
+done
+
+if [ "$BOOT" = "efi" ]; then
+ if [ ! -x "/sbin/mkfs.vfat" ]; then
+ echo "Couldn't find mkfs.vfat, is the 'dosfstools' package installed?" >&2
+ exit 1
+ fi
+ copy_exec /sbin/mkfs.vfat
+fi
+
+cp -pLt "$DESTDIR/lib" /lib/klibc-*.so
+for cmd in cat chroot ln ls mkdir mount mv sh umount uname; do
+ exe="/usr/lib/klibc/bin/$cmd"
+ if [ ! -f "$exe" ] || [ ! -x "$exe" ]; then
+ echo "No such executable: $exe" >&2
+ exit 1
+ fi
+ copy_exec "$exe" /bin
+done
+
+# copy udevd and (some of) its rules
+copy_exec /lib/systemd/systemd-udevd
+copy_exec /bin/udevadm
+
+mkdir -p -- "$DESTDIR/etc/udev" "$DESTDIR/lib/udev/rules.d"
+cat >"$DESTDIR/etc/udev/udev.conf" <<-EOF
+ udev_log=info
+ resolve_names=never
+EOF
+for rules in 50-udev-default.rules 55-dm.rules 60-block.rules \
+ 60-persistent-storage.rules 60-persistent-storage-dm.rules \
+ 63-md-raid-arrays.rules 95-dm-notify.rules; do
+ if [ -e "/lib/udev/rules.d/$rules" ]; then
+ cp -T "/lib/udev/rules.d/$rules" "$DESTDIR/lib/udev/rules.d/$rules"
+ fi
+done
+
+cd "$DESTDIR"
+find . -print0 | cpio -o0 -R 0:0 -H newc --quiet ${DEBUG:+--verbose} >"$INITRD"