Initial commit

initramfs/overlay/sbin/init

@@ -0,0 +1,40 @@
+#!/bin/sh -e
+
+export PATH=/usr/sbin:/usr/bin:/sbin:/bin
+
+mkdir -p /proc /run /sys
+mount -t sysfs sysfs /sys
+mount -t proc proc /proc
+mount -t tmpfs tmpfs /run
+
+# shellcheck disable=SC2046
+set -- $(cat /proc/cmdline)
+while [ $# -ge 1 ]; do
+    case "$1" in
+    root=nbd:*)
+        arg=${1#*:}
+        name=${arg#*:}
+        host=${arg%:*}
+        ;;
+    esac
+    shift
+done
+
+for path in /sys/class/net/*; do
+    [ -e "${path}" ] || continue
+    ip link set "${path##*/}" up
+done
+sleep 5
+udhcpc -q
+
+@bd-client -N "${name}" -R -p "${host}" /dev/nbd0
+mkdir -p /sysroot
+mount -o ro -t squashfs /dev/nbd0 /sysroot || nbd-client -c /dev/nbd0
+
+cd /sysroot
+mount --move /proc /sysroot/proc
+mount --move /sys /sysroot/sys
+mount --move /dev /sysroot/dev
+mount --move /run /sysroot/run
+
+exec switch_root /sysroot /lib/systemd/systemd