第 30.9 节 Linux 兼容层——基于 Slackware Linux

注意

slackware 并未提供基本系统的下载，需要自己在 slackware 或 FreeBSD 下（FreeBSD 需要安装 bash 以及 gmake）使用脚本生成，原版脚本地址为 https://github.com/nnnewb/slackware-WSL，为了方便.我们制作了一个基本系统，基于 15.0，在 FreeBSD 下使用了我们修改过的脚本即使用了此系统。如果不放心可以自己生成。

# fetch http://book.bsdcn.org/slackware.sh
# sh slackware.sh

脚本内容如下：

#!/bin/sh

export ROOT_DIR=/compat
export DIST=slackware
export DIST_FULLNAME=Slackware
VER=15.0
FILE=${DIST}64-${VER}.tar.xz
SUBDIR=""
URL=https://book.bsdcn.org
UPDATE_CMD="slackpkg update"
UPGRADE_CMD="slackpkg upgrade-all"
INSTALL_CMD="slackpkg install"
UPDATE=1
UPGRADE=1
INSTALL=1


echo "Starting to install ${DIST_FULLNAME}"
sleep 0.5


# check.sh
echo "Checking relative modules"

if [ ! "$(sysrc -n linux_enable)" = "YES" ]; then
    echo "linux service is not enabled. Enable it now?(Y|n)"
    read ANSWER
    case ${ANSWER} in
        [Nn][Oo]|[Nn])
            echo "Warning: You MUST start linux service with \"service linux start\" EACH TIME FREEBSD IS REBOOTED."
            echo "Sure to continue without enabling linux service?(y|N)"
            read ANSWER
            case ${ANSWER} in
                [Yy][Ee][Ss]|[Yy])
                    echo "WARNING: linux moudle not enabled"
                    ;;
                [Nn][Oo]|[Nn]|"")
                    echo "Enabling linux moudle"
                    sysrc linux_enable=YES
                    ;;
                *)
                    echo "Aborting."
                    exit 4
                    ;;
            esac
            ;;
        [Yy][Ee][Ss]|[Yy]|"")
            echo "Enabling linux moudle"
            sysrc linux_enable=YES
            ;;
        *)
            echo "Aborting."
            exit 4
            ;;
    esac
fi

echo "Starting linux service"
service linux start

if ! which -s dbus-daemon; then
    echo "dbus-daemon not found. Install dbus now?(Y|n)"
    read ANSWER
    case ${ANSWER} in
        [Nn][Oo]|[Nn])
            echo "Abort. dbus not installed"
            exit 2
            ;;
        [Yy][Ee][Ss]|[Yy]|"")
            echo "Installing dbus"
            pkg install -y dbus
            ;;
        *)
            echo "Aborting."
            exit 4
            ;;
    esac
fi

if [ ! "$(sysrc -n dbus_enable)" = "YES" ]; then
    echo "dbus is not enabled. Enable it now?(Y|n)"
    read ANSWER
    case ${ANSWER} in
        [Nn][Oo]|[Nn])
            echo "WARNING: You MUST start dbus with \"service dbus start\" EACH TIME FREEBSD IS REBOOTED."
            echo "Sure to continue without enabling dbus?(y|N)"
            read ANSWER
            case ${ANSWER} in
                [Yy][Ee][Ss]|[Yy])
                    echo "Warning: dbus not enabled"
                    ;;
                [Nn][Oo]|[Nn]|"")
                    echo "Enabling dbus service"
                    sysrc dbus_enable="YES"
                    ;;
                *)
                    echo "Aborting."
                    exit 4
                    ;;
            esac
            ;;
        [Yy][Ee][Ss]|[Yy]|"")
            echo "Enabling dbus service"
            sysrc dbus_enable="YES"
            ;;
        *)
            echo "Aborting."
            exit 4
            ;;
    esac
fi

if [ -z "$(ps aux | grep -p dbus | grep -v grep)" ]; then
    echo "Starting dbus service"
    service dbus start
fi

if [ ! "$(sysrc -f /boot/loader.conf -qn nullfs_load)" = "YES" ]; then
    echo "nullfs should be loaded when boot. Set nullfs_load to YES?(Y|n)"
    read ANSWER
    case ANSWER in
        [Nn][Oo]|[Nn])
            echo "Warning: You MUST load nullfs with \"kldload -v nullfs\" EACH TIME FREEBSD IS REBOOTED."
            echo "Sure to continue without setting nullfs_load to YES?(y|N)"
            read ANSWER
            case ANSWER in
                [Yy][Ee][Ss]|[Yy])
                    echo "Warning: nullfs_load not set"
                    ;;
                [Nn][Oo]|[Nn]|"")
                    echo "Setting nullfs_load to YES"
                    sysrc -f /boot/loader.conf nullfs_load="YES"
                    ;;
                *)
                    echo "Aborting."
                    exit 4
                    ;;
            esac
            ;;
        [Yy][Ee][Ss]|[Yy]|"")
            echo "Setting nullfs_load to YES"
            sysrc -f /boot/loader.conf nullfs_load="YES"
            ;;
        *)
            echo "Aborting."
            exit 4
            ;;
    esac
fi

if ! kldstat -n nullfs >/dev/null 2>&1; then
    echo "Loading nullfs module"
    kldload -v nullfs
fi


# pre_extract.sh


echo "${DIST_FULLNAME} will be installed in ${ROOT_DIR}/${DIST}"

echo "Downloading basic system"
fetch ${URL}/${FILE}

echo "Exacting basic system"
sleep 0.5
mkdir -p ${ROOT_DIR}/${DIST}
tar xvpf ${FILE} ${SUBDIR:-} -C ${ROOT_DIR}/${DIST} --numeric-owner

echo "Mounting recuired file system"
sleep 0.5
echo "devfs	${ROOT_DIR}/${DIST}/dev	devfs	rw,late	0	0" >> /etc/fstab
echo "tmpfs	${ROOT_DIR}/${DIST}/dev/shm	tmpfs	rw,late,size=1g,mode=1777	0	0" >> /etc/fstab
echo "fdescfs	${ROOT_DIR}/${DIST}/dev/fd	fdescfs	rw,late,linrdlnk	0	0" >> /etc/fstab
echo "linprocfs	${ROOT_DIR}/${DIST}/proc	linprocfs	rw,late	0	0" >> /etc/fstab
echo "linsysfs	${ROOT_DIR}/${DIST}/sys	linsysfs	rw,late	0	0" >> /etc/fstab
echo "/tmp	${ROOT_DIR}/${DIST}/tmp	nullfs	rw,late	0	0" >> /etc/fstab
#echo "/home	${ROOT_DIR}/${DIST}/home	nullfs	rw,late	0	0" >> /etc/fstab
mount -al


# setup.sh
echo "Should ${DIST_FULLNAME} use Alibaba DNS or local resolv.conf?( (A)li | (l)ocal | (c)ancel )"
read ANSWER
case ${ANSWER} in
    [Aa][Ll][Ii]|[Aa]|"")
        echo "Setting Alibaba DNS"
        echo "nameserver 223.5.5.5" >> ${ROOT_DIR}/etc/resolv.conf
        DNS_CONFIGURED=1
        ;;
    [Ll][Oo][Cc][Aa][Ll]|[Ll])
        echo "Using local reslov.conf"
        cp /etc/resolv.conf ${ROOT_DIR}/etc/resolv.conf
        DNS_CONFIGURED=1
        ;;
    *)
        echo "Cancled."
        echo "You have to edit ${ROOT_DIR}/etc/resolv.conf by yourself!"
        DNS_CONFIGURED=0
        ;;
esac

if [ ${DNS_CONFIGURED} = 1 ]; then
    if [ ${UPDATE} = 1 ]; then
        echo "Updating ${DIST_FULLNAME}"
        chroot ${ROOT_DIR}/${DIST} /bin/bash -c "${UPDATE_CMD}"
    fi
    if [ ${UPGRADE} = 1 ]; then
        echo "Upgrading ${DIST_FULLNAME}"
        chroot ${ROOT_DIR}/${DIST} /bin/bash -c "${UPGRADE_CMD}"
    fi
else
    echo "DNS is not set, skipping upgrade"
fi

echo "Setting default bash theme"
cp ${ROOT_DIR}/${DIST}/etc/profile ${ROOT_DIR}/${DIST}/root/.bashrc


echo "Cleaning up"
rm ${FILE}

echo "Done."
echo "Now you can switch to ${DIST_FULLNAME} with \"chroot ${ROOT_DIR}/${DIST} /bin/bash\""