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-rw-r--r--main/openrc/modloop.initd87
1 files changed, 87 insertions, 0 deletions
diff --git a/main/openrc/modloop.initd b/main/openrc/modloop.initd
new file mode 100644
index 0000000000..c32e1f49f5
--- /dev/null
+++ b/main/openrc/modloop.initd
@@ -0,0 +1,87 @@
+#!/sbin/runscript
+
+# script that will mount image with modules
+
+depend() {
+ need dev
+ before checkfs fsck hwdrivers modules hwclock
+ keyword novserver
+}
+
+# read kernel options
+init_KOPT() {
+ eval set -- $(cat /proc/cmdline 2>/dev/null)
+ while [ $# -gt 0 ]; do
+ case "$1" in
+ *=*) eval "KOPT_${1%%=*}='${1#*=}'" ;;
+ *) eval "KOPT_$(echo $1 | sed 's: :_:g')=yes" ;;
+ esac
+ shift
+ done
+}
+
+find_mnt() {
+ local dev="$1"
+ local fsfile="$2"
+ awk "\$ == \"$dev\" {print \$2}\"" "$fsfile" 2>/dev/null
+}
+
+# initialies: alpine_dev, alpine_mnt, alpine_fs, alpine_mounted
+find_media() {
+ init_KOPT
+ alpine_mounted=
+ alpine_dev=${KOPT_alpine_dev%%:*}
+ alpine_fs=${KOPT_alpine_dev#*:}
+ [ "$alpine_fs" = "$KOPT_alpine_dev" ] && unset alpine_fs
+ # first we check if alpine_dev is mounted and use this
+ alpine_mnt=$(find_mnt /dev/$alpine_dev /proc/mounts)
+ if [ -z "$alpine_mnt" ]; then
+ # then we check fstab
+ alpine_mnt=$(find_mnt /dev/$alpine_dev /etc/fstab)
+ else
+ alpine_mounted=yes
+ fi
+ # finally we fallback to /media/<devicename>
+ [ -z "$alpine_mnt" ] && alpine_mnt=/media/$alpine_dev
+}
+
+start() {
+ local modloop mount_opts
+ find_media
+ if [ -z "$alpine_dev" ] ; then
+ ebegin "Skipping mount module loopback (specify with alpine_dev)"
+ eend 0
+ return 0
+ fi
+
+ modloop=${KOPT_modloop:-$KOPT_BOOT_IMAGE.cmg}
+ [ -n "$alpine_fs" ] && mount_opts="-t $alpine_fs"
+
+ ebegin "Mounting loopback device for kernel modules"
+ if [ -z "$alpine_mounted" ]; then
+ mount $mount_opts /dev/$alpine_dev $alpine_mnt 2>/dev/null
+ fi
+ mkdir -p /.modloop /lib
+
+ mount -o loop,ro -t cramfs $alpine_mnt/$modloop /.modloop &&\
+ rm -rf /lib/modules &&\
+ ln -sf /.modloop/modules /lib/
+ eend $? || return 1
+
+ # copy firmware if there are any
+ if [ -d $alpine_mnt/firmware ]; then
+ ebegin "Copying firmware from $alpine_mnt/firmware"
+ cp -R -a $alpine_mnt/firmware /lib/
+ eend $?
+ fi
+}
+
+stop() {
+ find_media
+ [ -z "$alpine_dev" ] && return 0
+ ebegin "Unmounting loopback device for kernel modules"
+ umount -d /.modloop &&\
+ umount $alpine_mnt 2>/dev/null
+ eend $?
+}
+