188 lines
4.2 KiB
Bash
Executable File
188 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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# this is the init script version
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VERSION=1.0
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NEWROOT=/newroot
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SINGLEMODE=no
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# basic environment
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export PATH=/usr/bin:/bin:/usr/sbin:/sbin
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# basic mounts
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mount -t proc -o noexec,nosuid,nodev proc /proc
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mount -t sysfs -o noexec,nosuid,nodev sysfs /sys
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# some helpers
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ebegin() {
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echo -n " * $*: "
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}
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eend() {
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local msg
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if [ "$1" = 0 ] || [ $# -lt 1 ] ; then
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echo "ok."
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else
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shift
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echo "failed. $*"
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echo "initramfs emergency recovery shell launched"
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exec /bin/busybox sh
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fi
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}
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scan_drivers() {
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if [ "$AUTODETECT" != no ] ; then
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find /sys -name modalias | xargs sort | while read a ; do
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modprobe $a 2>/dev/null \
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|| echo $a >> /tmp/hwdrivers.failed
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done
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fi
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}
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find_ovl() {
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local mnt="$1"
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local ovl
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local lines
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# look for apkovl's on mounted media
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ovl=$( ls -1 "$mnt"/*.apkovl.tar.gz* 2>/dev/null ) || return 1
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lines=$(echo "$ovl" | wc -l)
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if [ $lines -gt 1 ] ; then
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echo "ERROR: More than one apkovl file was found on $(basename $mnt). None will be read." >&2
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return 1
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fi
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echo "$ovl"
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}
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# gotta start from somewhere :)
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echo "Alpine Init $VERSION"
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# read the kernel options
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for i in `cat /proc/cmdline` ; do
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case $i in
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s|single|1)
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SINGLEMODE=yes ;;
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modules=*)
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MODULES="`echo ${i#modules=} | tr ',' ' '`";;
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noautodetect)
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AUTODETECT=no;;
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*=*) eval KOPT_$i ;;
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*) eval KOPT_$i=yes ;;
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esac
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done
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ALPINE_DEV=${KOPT_alpine_dev%%:*}
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ALPINE_MNT=/media/$ALPINE_DEV
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# hide kernel messages
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dmesg -n 1
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# setup /dev
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ebegin "Starting mdev"
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mount -t tmpfs -o exec,nosuid,mode=0755 mdev /dev
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mknod -m 666 /dev/null c 1 3
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ln -s sr0 /dev/cdrom
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echo "/sbin/mdev" > /proc/sys/kernel/hotplug
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mdev -s
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RC=$?
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[ -d /dev/pts ] || mkdir -m 755 /dev/pts
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[ -c /dev/ptmx ] || mknod -m 666 /dev/ptmx c 5 2
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mount -t devpts -o gid=5,mode=0620,noexec,nosuid devpts /dev/pts
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[ -d /dev/shm ] || mkdir /dev/shm
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mount -t tmpfs -o nodev,nosuid,noexec shm /dev/shm
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eend $RC
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# load available drivers to get access to modloop media
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ebegin "Loading boot drivers"
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[ "$MODULES" ] && modprobe $MODULES 2> /dev/null
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if [ -f /etc/modules ] ; then
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sed 's/\#.*//g' < /etc/modules |
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while read module args; do
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modprobe -q $module $args
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done
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fi
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scan_drivers
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scan_drivers
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eend 0
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# locate boot media and mount it
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ebegin "Mounting boot media"
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mount $ALPINE_MNT >/dev/null 2>&1
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eend $?
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ebegin "Mounting loopback device for kernel modules"
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modprobe loop
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mount -o loop,ro -t cramfs /media/$ALPINE_DEV/$(dirname ${KOPT_BOOT_IMAGE:-""})/modloop.cmg /.modloop
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rc=$?
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if [ "$rc" = 0 ]; then
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rm -rf /lib/modules
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ln -sf /.modloop/modules /lib
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fi
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if [ -d $ALPINE_MNT/firmware ]; then
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mkdir -p /lib/firmware
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cp -a $ALPINE_MNT/firmware/* /lib/firmware/
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fi
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eend $?
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# early console?
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if [ "$SINGLEMODE" = "yes" ]; then
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echo "Entering single mode. Type 'exit' to continue booting."
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sh
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fi
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# more drivers
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ebegin "Loading hardware drivers"
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scan_drivers
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eend 0
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mount -t tmpfs tmpfs $NEWROOT
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# look for apkovl
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for i in usb floppy cdrom; do
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mount /media/$i 2>/dev/null || continue
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ovl=$(find_ovl /media/$i)
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[ -f "$ovl" ] && break
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umount /media/$i 2>/dev/null
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done
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if [ -f "$ovl" ]; then
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ebegin "Loading user settings from $ovl"
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tar -C $NEWROOT -zxf "$ovl"
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eend $?
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umount /media/$i 2>/dev/null
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pkgs=$(sed 's/\#.*//' $NEWROOT/etc/lbu/packages.list 2>/dev/null)
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fi
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# install new root
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ebegin "Installing packages to root filesystem"
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apk add --root /newroot --repository /media/$ALPINE_DEV/apks \
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--initdb --quiet --progress $pkgs
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eend $?
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# copy alpine release info
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cp /media/$ALPINE_DEV/.alpine-release $NEWROOT/
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ln -sf /.alpine-release $NEWROOT/etc/alpine-release
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# if there is no repositories file, then use the default
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if ! [ -f $NEWROOT/etc/apk/repositories ]; then
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echo /media/$ALPINE_DEV/apks > $NEWROOT/etc/apk/repositories
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fi
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# switch over to new root
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cat /proc/mounts | while read DEV DIR TYPE OPTS ; do
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if [ "$DIR" != "/" -a "$DIR" != "$NEWROOT" -a -d "$DIR" ]; then
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mkdir -p $NEWROOT/$DIR
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mount -o move $DIR $NEWROOT/$DIR
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fi
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done
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sync
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ln -sf /.modloop/modules $NEWROOT/lib/modules
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echo -e "\nStarting $(cut -f1 $NEWROOT/.alpine-release)"
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if [ -x $NEWROOT/sbin/init ]; then
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exec /bin/busybox switch_root $NEWROOT /sbin/init $KOPT_init_args
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fi
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echo "initramfs emergency recovery shell launched"
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exec /bin/busybox sh
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reboot
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