1#!/bin/sh 2 3echo "PREINIT: Start" 4 5PATH=/sbin:/bin:/usr/sbin:/usr/bin 6mount -o remount,rw / 7 8mkdir -p /proc 9mkdir -p /sys 10mkdir -p /run 11mkdir -p /var/run 12 13mount -t proc proc /proc 14mount -t sysfs sysfs /sys 15 16[ -z "$CONSOLE" ] && CONSOLE="/dev/console" 17 18BASE_OVERLAY_ETC_DIR={OVERLAYFS_ETC_MOUNT_POINT}/overlay-etc 19UPPER_DIR=$BASE_OVERLAY_ETC_DIR/upper 20WORK_DIR=$BASE_OVERLAY_ETC_DIR/work 21LOWER_DIR=$BASE_OVERLAY_ETC_DIR/lower 22 23mkdir -p {OVERLAYFS_ETC_MOUNT_POINT} 24if mount -n -t {OVERLAYFS_ETC_FSTYPE} \ 25 -o {OVERLAYFS_ETC_MOUNT_OPTIONS} \ 26 {OVERLAYFS_ETC_DEVICE} {OVERLAYFS_ETC_MOUNT_POINT} 27then 28 mkdir -p $UPPER_DIR 29 mkdir -p $WORK_DIR 30 31 if {OVERLAYFS_ETC_EXPOSE_LOWER}; then 32 mkdir -p $LOWER_DIR 33 34 # provide read-only access to original /etc content 35 mount -o bind,ro /etc $LOWER_DIR 36 fi 37 38 mount -n -t overlay \ 39 -o upperdir=$UPPER_DIR \ 40 -o lowerdir=/etc \ 41 -o workdir=$WORK_DIR \ 42 -o index=off,xino=off,redirect_dir=off,metacopy=off \ 43 $UPPER_DIR /etc || \ 44 echo "PREINIT: Mounting etc-overlay failed!" 45else 46 echo "PREINIT: Mounting </data> failed!" 47fi 48 49echo "PREINIT: done; starting </sbin/init>" 50exec {SBIN_INIT_NAME} 51