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#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
COMMAND="$1"
KERNEL_VERSION="$2"
BOOT_DIR_ABS="$3"
KERNEL_IMAGE="$4"
if [[ -f /etc/machine-id ]]; then
read MACHINE_ID < /etc/machine-id
fi
if ! [[ $MACHINE_ID ]]; then
exit 1
fi
BOOT_DIR="/$MACHINE_ID/$KERNEL_VERSION"
BOOT_ROOT=${BOOT_DIR_ABS%$BOOT_DIR}
LOADER_ENTRY="$BOOT_ROOT/loader/entries/$MACHINE_ID-$KERNEL_VERSION.conf"
if [[ $COMMAND == remove ]]; then
exec rm -f "$LOADER_ENTRY"
fi
if ! [[ $COMMAND == add ]]; then
exit 1
fi
if ! [[ $KERNEL_IMAGE ]]; then
exit 1
fi
if [[ -f /etc/os-release ]]; then
. /etc/os-release
elif [[ -f /usr/lib/os-release ]]; then
. /usr/lib/os-release
fi
if ! [[ $PRETTY_NAME ]]; then
PRETTY_NAME="GNU/Linux $KERNEL_VERSION"
fi
declare -a BOOT_OPTIONS
if [[ -f /etc/kernel/cmdline ]]; then
read -r -d '' -a BOOT_OPTIONS < /etc/kernel/cmdline
fi
if ! [[ ${BOOT_OPTIONS[*]} ]]; then
read -r -d '' -a line < /proc/cmdline
for i in "${line[@]}"; do
[[ "${i#initrd=*}" != "$i" ]] && continue
BOOT_OPTIONS+=("$i")
done
fi
if ! [[ ${BOOT_OPTIONS[*]} ]]; then
echo "Could not determine the kernel command line parameters." >&2
echo "Please specify the kernel command line in /etc/kernel/cmdline!" >&2
exit 1
fi
cp "$KERNEL_IMAGE" "$BOOT_DIR_ABS/linux" &&
chown root:root "$BOOT_DIR_ABS/linux" &&
chmod 0644 "$BOOT_DIR_ABS/linux" || {
echo "Could not copy '$KERNEL_IMAGE to '$BOOT_DIR_ABS/linux'." >&2
exit 1
}
mkdir -p "${LOADER_ENTRY%/*}" || {
echo "Could not create loader entry directory '${LOADER_ENTRY%/*}'." >&2
exit 1
}
{
echo "title $PRETTY_NAME"
echo "version $KERNEL_VERSION"
echo "machine-id $MACHINE_ID"
echo "options ${BOOT_OPTIONS[*]}"
echo "linux $BOOT_DIR/linux"
[[ -f $BOOT_DIR_ABS/initrd ]] && \
echo "initrd $BOOT_DIR/initrd"
:
} > "$LOADER_ENTRY" || {
echo "Could not create loader entry '$LOADER_ENTRY'." >&2
exit 1
}
exit 0
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