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|
#!/bin/sh -e
# update-kernel
#
# Kernel and firmware update script for Alpine installations set up
# with setup-bootable
#
# Copyright (c) 2014 Timo Teräs
# Copyright (c) 2014 Kaarle Ritvanen
SCRIPT=update-kernel
VIRTUAL=.tmp-$SCRIPT
BUILDDIR=
FLAVOR=
MNTDIR=
PACKAGES=
SIGNALS="HUP INT TERM"
TMPDIR=
features=
OPTS=$(getopt -l build-dir:,flavor:,feature:,package: -n $SCRIPT -o b:f:F:p: \
-- "$@")
eval set -- "$OPTS"
while :; do
case "$1" in
-b|--build-dir)
BUILDDIR=$2
;;
-f|--flavor)
FLAVOR=$2
;;
-F|--feature)
features="$features $2"
;;
-p|--package)
PACKAGES="$PACKAGES $2"
;;
--)
break
;;
esac
shift 2
done
DESTDIR=$2
error() {
echo "$1" >&2
exit 1
}
[ "$BUILDDIR" -a "$FLAVOR" ] && \
error "Cannot specify both build directory and flavor"
if [ -z "$DESTDIR" ]; then
[ "$FLAVOR" ] && error "Cannot specify flavor when updating the current kernel"
while read MOUNT; do
set -- $MOUNT
[ $2 = /.modloop ] || continue
DESTDIR=$(dirname $(losetup $1 | cut -d " " -f 3))
MNTDIR=$(dirname "$DESTDIR")
break
done < /proc/mounts
[ "$MNTDIR" ] || error "Module loopback device not mounted"
fi
remount() {
mount $1 -o remount "$MNTDIR"
}
ignore_sigs() {
trap "" $SIGNALS
}
clean_up() {
set +e
ignore_sigs
apk del -q $VIRTUAL
rm -fr "$TMPDIR"
}
trap clean_up EXIT $SIGNALS
apk add -qU -t $VIRTUAL mkinitfs squashfs-tools
if [ -z "$features" ]; then
. /etc/mkinitfs/mkinitfs.conf
fi
if [ -z "$FLAVOR" ]; then
FLAVOR=$(uname -r | cut -d - -f 3-)
[ "$FLAVOR" ] || FLAVOR=vanilla
fi
TMPDIR=$(mktemp -dt $SCRIPT.XXXXXX)
ROOT=$TMPDIR/root
BOOT=$ROOT/boot
_apk() {
local cmd=$1
shift
apk $cmd -p "$ROOT" --keys-dir /etc/apk/keys \
--repositories-file /etc/apk/repositories $*
}
add_pkgs() {
_apk add -q --no-scripts $*
}
extra_pkgs() {
local res=$(_apk search -x $1)
if [ "$res" ]; then
add_pkgs $*
fi
}
add_pkgs -U --initdb alpine-base $PACKAGES
if [ "$BUILDDIR" ]; then
mkdir -p "$BOOT"
make -C "$BUILDDIR" firmware_install install modules_install \
INSTALL_MOD_PATH="$ROOT" INSTALL_PATH="$BOOT"
else
add_pkgs "linux-$FLAVOR" linux-firmware
if [ -z "$PACKAGES" ]; then
extra_pkgs "dahdi-linux-$FLAVOR" dahdi-linux
extra_pkgs "xtables-addons-$FLAVOR"
fi
fi
KVER_FLAVOR=
[ "$FLAVOR" = vanilla ] || KVER_FLAVOR=-$FLAVOR
KVER=$(basename $(ls -d "$ROOT"/lib/modules/*"$KVER_FLAVOR"))
depmod -b "$ROOT" "$KVER"
STAGING=$TMPDIR/boot
MODLOOP=$TMPDIR/modloop
MODIMG=$FLAVOR.modloop.squashfs
mkdir "$MODLOOP" "$STAGING"
cp -a "$ROOT/lib/modules" "$MODLOOP"
cp -a "$ROOT/lib/firmware" "$MODLOOP/modules"
mksquashfs "$MODLOOP" "$STAGING/$MODIMG" -comp xz
mkinitfs -q -b "$ROOT" -F "$features base squashfs" -o "$STAGING/$FLAVOR.gz" \
"$KVER"
cp "$BOOT/vmlinuz$KVER_FLAVOR" "$STAGING/$FLAVOR"
if [ "$MNTDIR" ]; then
ignore_sigs
umount /.modloop
remount -w
fi
mv "$STAGING"/* "$DESTDIR"
if [ "$MNTDIR" ]; then
set +e
sync
remount -r
mount -o loop "$DESTDIR/$MODIMG" /.modloop
fi
exit 0
|
