path: root/builder/dnbd3-rootfs/scripts/build.sh

source "$(dirname "${BASH_SOURCE[0]}")/rebash/core.sh"
core.import logging

build_clean_qemu_nbd() {
    # removes qemu-nbd.
    #
    rm --recursive --force "$1/*"
}
build_compile_qemu_nbd() {
    # Downloads and compiles qemu-nbd.
    #
    # Examples:
    #
    # >>> build_compile_qemu_nbd path/to/nbd/directory/
    # ...
    # Provides the following file:
    # "$1/qemu-nbd"
    logging.info 'Compiling static qemu-nbd binary. This takes a while,' \
        'grab a cup of coffee...'
    # TODO check if need all, after disabling features
    # TODO check dependencies
    #su -s /bin/bash nobody
    #yaourt --noconfirm -S glib2-static glibc-static pcre-static
    #exit
    pushd "$(dirname $1)"
    [ ! -e qemu ] && git clone git://git.qemu.org/qemu.git qemu
    cd qemu
    # TODO check what other features can be disabled
    # --static
    ./configure --target-list=x86_64-linux-user \
        --python=$(which python2) --disable-docs --disable-gtk --disable-vnc \
        --disable-kvm --disable-libssh2 --enable-user --disable-system \
        --disable-fdt --disable-libnfs --disable-glusterfs --disable-libiscsi \
        --disable-gcrypt --disable-nettle
    make qemu-nbd
    local ret=$?
    popd
    return $ret
}
build_compile_nbd() {
    # Downloads and compiles nbd.
    #
    # Examples:
    #
    # >>> build_compile_nbd path/to/nbd/directory/
    # ...
    # Provides the following file:
    # "$1/nbd.ko"
    pushd "$1"
    logging.info 'Compile the nbd kernel module.'
    make
    popd
    return $?
}
build_clean_nbd() {
    # Cleans nbd specific generated files
    #
    # Examples:
    #
    # >>> build_clean_nbd path/to/nbd/directory/
    # ...
    # Removes the following file:
    # "$1/nbd.ko"
    pushd "$1"
    make clean
    popd
    return $?
}
build_compile_dnbd3() {
    # Downloads and compiles dnbd3.
    #
    # Examples:
    #
    # >>> build_compile_dnbd3 path/to/dnbd3/directory/
    # ...
    # Provides the following file:
    # "$1/build/dnbd3.ko"
    pushd "$1/.."
    rm --recursive --force "$1"
    git clone git://git.openslx.org/dnbd3.git
    cd dnbd3
    ./build.sh
    popd
    return $?
}
build_clean_dnbd3() {
    # Removes generated dnbd3 specific files.
    #
    # Examples:
    #
    # >>> build_clean_dnbd3 path/to/dnbd3/directory/
    # ...
    # Removes the following directory:
    # "$1/build"
    rm --recursive --force "$1/build"
    return $?
}
build_compile_systemd_preserve_process_marker() {
    # Compiles simple c program.
    #
    # Examples:
    #
    # >>> build_compile_systemd_preserve_process_marker path/to/program/folder
    pushd "$1"
    make
    popd
    return $?
}
build_clean_systemd_preserve_process_marker() {
    # Removes compiled simple c program.
    #
    # Examples:
    #
    # >>> build_clean_systemd_preserve_process_marker path/to/program/folder
    pushd "$1"
    make clean
    popd
    return $?
}
build_mount_partition() {
    # Mounts a partition at given offset.
    #
    # Examples:
    #
    # >>> build_mount_partition /dev/DEVICE_NAME PARTITION_IDENTIFIER
    # ...
    local device="$1"
    local partition_identifier="$2"
    local loop_device="$(losetup --find)"

    local sector_size="$(blockdev --getbsz "$device")"
    local partition_info="(partx --raw --noheadings --output START,NAME,UUID \
        "$device" 2>/dev/null| grep part)"
    local offset_sectors="$(echo "$partition_identifier" | \
        cut --delimiter=' ' --fields=1)"
    if [ -z "$offset_sectors" ]; then
        logging.warn "could not find partition with identifier \"$partition_identifier\" on device $device"
        return 1
    fi
    # NOTE: Could overflow on 32bit systems
    # logging.warn "$(("$offset_sectors"*512))"
    local offset_bytes="$(echo | awk -v x="$offset_sectors" -v y="$sector_size" '{print x * y}')"

    # NOTE: Test if mount works directly (problem with btrfs device id).
    # mount --verbose --options loop,offset="$offset_bytes" "$device" "$mount_point"
    losetup --verbose --offset "$offset_bytes" "$loop_device" "$device"
    echo "$loop_device"
}