#!/bin/busybox sh # this is the init script version VERSION=1.1 NEWROOT=/newroot SINGLEMODE=no /bin/busybox --install -s # basic environment export PATH=/usr/bin:/bin:/usr/sbin:/sbin # needed devs [ -c /dev/null ] || mknod -m 666 /dev/null c 1 3 # basic mounts mount -t proc -o noexec,nosuid,nodev proc /proc mount -t sysfs -o noexec,nosuid,nodev sysfs /sys # some helpers ebegin() { echo -n " * $*: " } eend() { local msg if [ "$1" = 0 ] || [ $# -lt 1 ] ; then echo "ok." else shift echo "failed. $*" echo "initramfs emergency recovery shell launched. Type 'exit' to continue boot" /bin/busybox sh fi } scan_drivers() { if [ "$AUTODETECT" != no ] ; then find /sys -name modalias | xargs sort -u | xargs modprobe -a 2> /dev/null fi } find_ovl() { local mnt="$1" local ovl local lines # look for apkovl's on mounted media ovl=$( ls -1 "$mnt"/*.apkovl.tar.gz* 2>/dev/null ) || return 1 lines=$(echo "$ovl" | wc -l) if [ $lines -gt 1 ] ; then echo "ERROR: More than one apkovl file was found on $(basename $mnt). None will be read." >&2 return 1 fi echo "$ovl" } retry_mount() { # usb might need some time to settle so we retry a few times for i in $(seq 0 19); do mount $@ 2>&1 && return 0 sleep 1 done return 1 } unpack_apkovl() { local ovl="$1" local dest="$2" local suffix=${ovl##*.} local i if [ "$suffix" = "gz" ]; then tar -C "$dest" -zxf "$ovl" return $? fi for i in $ALPINE_MNT/*/*/openssl-[0-9]*.apk $ALPINE_MNT/*/openssl-[0-9]*.apk; do [ -f "$i" ] && tar --numeric-owner -C / -zxf $i && break done if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then errstr="Cipher $suffix is not supported" return 1 fi local count=0 # beep echo -e "\007" while [ $count -lt 3 ]; do openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \ -C "$dest" -zx 2>/dev/null && return 0 count=$(( $count + 1 )) done return 1 } # gotta start from somewhere :) echo "Alpine Init $VERSION" # read the kernel options for i in `cat /proc/cmdline` ; do case $i in s|single|1) SINGLEMODE=yes ;; modules=*) MODULES="`echo ${i#modules=} | tr ',' ' '`";; noautodetect) AUTODETECT=no;; *=*) eval KOPT_$i ;; *) eval KOPT_$i=yes ;; esac done # start bootcharting if wanted if [ -n "$KOPT_chart" ]; then ebegin "Starting bootchart logging" /sbin/bootchartd start-initfs "$NEWROOT" eend 0 fi ALPINE_DEV=${KOPT_alpine_dev%%:*} ALPINE_DEV_FS=${KOPT_alpine_dev##*:} if [ "$ALPINE_DEV_FS" = "$ALPINE_DEV" ]; then unset ALPINE_DEV_FS fi ALPINE_MNT=/media/$ALPINE_DEV # hide kernel messages dmesg -n 1 # setup /dev ebegin "Starting mdev" mount -t tmpfs -o exec,nosuid,mode=0755 mdev /dev ln -s sr0 /dev/cdrom echo "/sbin/mdev" > /proc/sys/kernel/hotplug mdev -s RC=$? [ -d /dev/pts ] || mkdir -m 755 /dev/pts [ -c /dev/ptmx ] || mknod -m 666 /dev/ptmx c 5 2 mount -t devpts -o gid=5,mode=0620,noexec,nosuid devpts /dev/pts [ -d /dev/shm ] || mkdir /dev/shm mount -t tmpfs -o nodev,nosuid,noexec shm /dev/shm eend $RC # load available drivers to get access to modloop media ebegin "Loading boot drivers" [ "$MODULES" ] && modprobe -a $MODULES 2> /dev/null if [ -f /etc/modules ] ; then sed 's/\#.*//g' < /etc/modules | while read module args; do modprobe -q $module $args done fi scan_drivers scan_drivers eend 0 # check if root=... was set if [ -n "$KOPT_root" ]; then if [ "$SINGLEMODE" = "yes" ]; then echo "Entering single mode. Type 'exit' to continue booting." sh fi case "$KOPT_root" in /dev/md*) mknod $KOPT_root b 9 ${KOPT_root#/dev/md} raidautorun "$KOPT_root" ;; esac ebegin "Mounting root" retry_mount $KOPT_root $NEWROOT 2>/dev/null eend $? cat /proc/mounts | while read DEV DIR TYPE OPTS ; do if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then mkdir -p $NEWROOT/$DIR mount -o move $DIR $NEWROOT/$DIR fi done sync exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args echo "initramfs emergency recovery shell launched" exec /bin/busybox sh fi # locate boot media and mount it ebegin "Mounting boot media" mkdir -p $ALPINE_MNT if [ -n "$ALPINE_DEV_FS" ]; then mount_opts="-t $ALPINE_DEV_FS" fi retry_mount $mount_opts /dev/$ALPINE_DEV $ALPINE_MNT >/dev/null 2>&1 eend $? ebegin "Mounting loopback device for kernel modules" modprobe loop if [ -n "$KOPT_modloop" ]; then modloop=$KOPT_modloop else modloop=$KOPT_BOOT_IMAGE.cmg fi mount -o loop,ro -t cramfs $ALPINE_MNT/$modloop /.modloop rc=$? if [ "$rc" = 0 ]; then rm -rf /lib/modules ln -sf /.modloop/modules /lib fi eend $? if [ -d $ALPINE_MNT/firmware ]; then ebegin "Copying firmware from $ALPINE_MNT/firmware" mkdir -p /lib cp -R -a $ALPINE_MNT/firmware /lib/ eend $? fi mkdir -p /etc/apk for i in $ALPINE_MNT/*/APK_INDEX.gz $ALPINE_MNT/*/*/APK_INDEX.gz; do [ -r "$i" ] && echo ${i%/APK_INDEX.gz} >> /etc/apk/repositories done # early console? if [ "$SINGLEMODE" = "yes" ]; then echo "Entering single mode. Type 'exit' to continue booting." sh fi # more drivers ebegin "Loading hardware drivers" scan_drivers eend 0 mount -t tmpfs tmpfs $NEWROOT # look for apkovl if dmesg | grep '^usb-storage: waiting' >/dev/null; then ebegin "Waiting for USB device to settle" while ! dmesg | grep 'usb-storage: device scan complete' >/dev/null; do sleep 1 done eend 0 fi for i in usb floppy cdrom; do mount /media/$i 2>/dev/null || continue ovl=$(find_ovl /media/$i) [ -f "$ovl" ] && break umount /media/$i 2>/dev/null done if ! [ -f "$ovl" ]; then ovl=$(find_ovl $ALPINE_MNT) fi if [ -f "$ovl" ]; then ebegin "Loading user settings from $ovl" unpack_apkovl "$ovl" $NEWROOT eend $? $errstr umount /media/$i 2>/dev/null & pkgs=$(sed 's/\#.*//' $NEWROOT/etc/lbu/packages.list 2>/dev/null) fi # install new root ebegin "Installing packages to root filesystem" if [ -n "$KOPT_chart" ]; then pkgs="$pkgs acct" fi apkflags="--initdb --quiet --progress --force" if [ -z "$KOPT_keep_apk_new" ]; then apkflags="$apkflags --clean-protected" fi apk add --root /newroot $apkflags $pkgs >/dev/null eend $? # copy alpine release info cp $ALPINE_MNT/.alpine-release $NEWROOT/ ln -sf /.alpine-release $NEWROOT/etc/alpine-release # if there is no repositories file, then use the default if ! [ -f $NEWROOT/etc/apk/repositories ]; then cp /etc/apk/repositories $NEWROOT/etc/apk/repositories fi # setup bootchart for switch_root chart_init="" if [ -n "$KOPT_chart" ]; then /sbin/bootchartd stop-initfs "$NEWROOT" chart_init="/sbin/bootchartd start-rootfs" fi # switch over to new root cat /proc/mounts | while read DEV DIR TYPE OPTS ; do if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then mkdir -p $NEWROOT/$DIR mount -o move $DIR $NEWROOT/$DIR fi done ln -sf /.modloop/modules $NEWROOT/lib/modules sync echo "" if [ -x $NEWROOT/sbin/init ]; then exec /bin/busybox switch_root $NEWROOT $chart_init /sbin/init $KOPT_init_args fi echo "initramfs emergency recovery shell launched" exec /bin/busybox sh reboot