wsl2-systemd script

enter-systemd-namespace

@@ -0,0 +1,51 @@
+#!/bin/bash --norc
+
+if [ "$LOGNAME" != "root" ]; then
+    echo "You need to run $0 through sudo"
+    exit 1
+fi
+
+if [ -x /usr/sbin/daemonize ]; then
+    DAEMONIZE=/usr/sbin/daemonize
+elif [ -x /usr/bin/daemonize ]; then
+    DAEMONIZE=/usr/bin/daemonize
+else
+    echo "Cannot execute daemonize to start systemd."
+    exit 1
+fi
+
+if ! command -v /lib/systemd/systemd > /dev/null; then
+    echo "Cannot execute /lib/systemd/systemd."
+    exit 1
+fi
+
+if ! command -v /usr/bin/unshare > /dev/null; then
+    echo "Cannot execute /usr/bin/unshare."
+    exit 1
+fi
+
+SYSTEMD_EXE="/lib/systemd/systemd --unit=basic.target"
+SYSTEMD_PID="$(ps -eo pid=,args= | awk '$2" "$3=="'"$SYSTEMD_EXE"'" {print $1}')"
+if [ -z "$SYSTEMD_PID" ]; then
+    "$DAEMONIZE" /usr/bin/unshare --fork --pid --mount-proc bash -c 'export container=wsl; mount -t binfmt_misc binfmt_misc /proc/sys/fs/binfmt_misc; exec '"$SYSTEMD_EXE"
+    while [ -z "$SYSTEMD_PID" ]; do
+        echo "Sleeping for 1 second to let systemd settle"
+        sleep 1
+        SYSTEMD_PID="$(ps -eo pid=,args= | awk '$2" "$3=="'"$SYSTEMD_EXE"'" {print $1}')"
+    done
+fi
+
+USER_HOME="$(getent passwd | awk -F: '$1=="'"$SUDO_USER"'" {print $6}')"
+if [ -n "$SYSTEMD_PID" ] && [ "$SYSTEMD_PID" != "1" ]; then
+    if [ -n "$1" ] && [ "$1" != "bash --login" ] && [ "$1" != "/bin/bash --login" ]; then
+        exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \
+            /usr/bin/sudo -H -u "$SUDO_USER" \
+            /bin/bash -c 'set -a; [ -f "$HOME/.systemd-env" ] && source "$HOME/.systemd-env"; set +a; exec bash -c '"$(printf "%q" "$@")"
+    else
+        exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \
+            /bin/login -p -f "$SUDO_USER" \
+            $([ -f "$USER_HOME/.systemd-env" ] && /bin/cat "$USER_HOME/.systemd-env" | xargs printf ' %q')
+    fi
+    echo "Existential crisis"
+    exit 1
+fi

entrypoint.sh

@@ -39,6 +39,11 @@ if [ "$ADDITIONALS" == "true" ]; then
 	echo "Additional install has started"
 	sh /additional_install.sh
 	echo "Additional install has finished"
+else if [ "$WSL2" == "true" ]; then
+	echo "WSL2 systemd script has started"
+	sh /wsl2-systemd-script.sh
+	#systemctl
+	echo "WSL2 systemd script has finished"
 else
 	if [[ "$SMARTHOST_PROXY" == "YES" || "$SMARTHOST_PROXY" == "TRUE" ]]; then 
 		PROXY_TYPE=smarthost-proxy" "$PROXY_TYPE; 

install.sh

@@ -648,6 +648,21 @@ if [ "$ANSWER" == "y" ] || [ "$ANSWER" == "Y" ] || [ "$ANSWER" == "" ]; then
 	registry.format.hu/installer-tool
 fi
 
+# enable systemd support on current images
+echo "Would you like to install and enable systemd support? (Y/n)";
+read -r ANSWER;
+if [ "$ANSWER" == "y" ] || [ "$ANSWER" == "Y" ] || [ "$ANSWER" == "" ] ; then
+
+	# Run installer tool
+	$SUDO_CMD docker run \
+	--env WSL2=true \
+	--env SUDO_CMD=$SUDO_CMD \
+	--volume $HOME/.ssh/installer:/root/.ssh/id_rsa \
+	--volume /etc/user/:/etc/user/ \
+	--volume /etc/system/:/etc/system/ \
+	registry.format.hu/installer-tool
+fi;
+
 shopt -s expand_aliases
 source $HOME/.bash_aliases
 

start-systemd-namespace

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+SYSTEMD_EXE="/lib/systemd/systemd --unit=basic.target"
+SYSTEMD_PID="$(ps -eo pid=,args= | awk '$2" "$3=="'"$SYSTEMD_EXE"'" {print $1}')"
+if [ "$LOGNAME" != "root" ] && ( [ -z "$SYSTEMD_PID" ] || [ "$SYSTEMD_PID" != "1" ] ); then
+    export | sed -e 's/^declare -x //;/^IFS=".*[^"]$/{N;s/\n//}' | \
+        grep -E -v "^(BASH|BASH_ENV|DIRSTACK|EUID|GROUPS|HOME|HOSTNAME|\
+IFS|LANG|LOGNAME|MACHTYPE|MAIL|NAME|OLDPWD|OPTERR|\
+OSTYPE|PATH|PIPESTATUS|POSIXLY_CORRECT|PPID|PS1|PS4|\
+SHELL|SHELLOPTS|SHLVL|SYSTEMD_PID|UID|USER|_)(=|\$)" > "$HOME/.systemd-env"
+    export PRE_NAMESPACE_PATH="$PATH"
+    export PRE_NAMESPACE_PWD="$(pwd)"
+    exec $SUDO_CMD /enter-systemd-namespace "$BASH_EXECUTION_STRING"
+fi
+if [ -n "$PRE_NAMESPACE_PATH" ]; then
+    export PATH="$PRE_NAMESPACE_PATH"
+    unset PRE_NAMESPACE_PATH
+fi
+if [ -n "$PRE_NAMESPACE_PWD" ]; then
+    cd "$PRE_NAMESPACE_PWD"
+    unset PRE_NAMESPACE_PWD
+fi

wsl2-systemd-script.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+if [ "$1" != "--force" ]; then
+    if [ -f /start-systemd-namespace ]; then
+        echo "It appears you have already installed the systemd hack."
+        echo "To forcibly reinstall, run this script with the \`--force\` parameter."
+        exit
+    fi
+    if [ -z "$WSL_DISTRO_NAME" ]; then
+        echo "It appears that you are not running on WSL."
+        echo "To forcibly install anyway, run this script with the \`--force\` parameter."
+        exit
+    fi
+fi
+
+#self_dir="$(dirname $0)"
+
+function interop_prefix {
+	win_location="/mnt/"
+	if [ -f /etc/wsl.conf ]; then
+		tmp="$(awk -F '=' '/root/ {print $2}' /etc/wsl.conf | awk '{$1=$1;print}')"
+		[ "$tmp" == "" ] || win_location="$tmp"
+		unset tmp
+	fi
+	echo "$win_location"
+
+	unset win_location
+}
+
+function sysdrive_prefix {
+	win_location="$(interop_prefix)"
+	hard_reset=0
+	for pt in $(ls "$win_location"); do
+		if [ $(echo "$pt" | wc -l) -eq 1 ]; then
+			if [ -d "$win_location$pt/Windows/System32" ]; then
+				hard_reset=1
+				win_location="$pt"
+				break
+			fi
+		fi 
+	done
+
+	if [ $hard_reset -eq 0 ]; then
+		win_location="c"
+	fi
+
+	echo "$win_location"
+
+	unset win_location
+	unset hard_reset
+}
+
+$SUDO_CMD hwclock -s
+$SUDO_CMD apt-get update && $SUDO_CMD apt-get install -yqq daemonize dbus-user-session fontconfig
+
+#$SUDO_CMD cp "$self_dir/start-systemd-namespace" /start-systemd-namespace
+#$SUDO_CMD cp "$self_dir/enter-systemd-namespace" /enter-systemd-namespace
+$SUDO_CMD chmod +x /enter-systemd-namespace
+
+$SUDO_CMD tee /etc/$SUDO_CMDers.d/systemd-namespace >/dev/null <<EOF
+Defaults        env_keep += WSLPATH
+Defaults        env_keep += WSLENV
+Defaults        env_keep += WSL_INTEROP
+Defaults        env_keep += WSL_DISTRO_NAME
+Defaults        env_keep += PRE_NAMESPACE_PATH
+Defaults        env_keep += PRE_NAMESPACE_PWD
+%$SUDO_CMD ALL=(ALL) NOPASSWD: /enter-systemd-namespace
+EOF
+
+if ! grep 'start-systemd-namespace' /etc/bash.bashrc >/dev/null; then
+  $SUDO_CMD sed -i 2a"# Start or enter a PID namespace in WSL2\nsource /start-systemd-namespace\n" /etc/bash.bashrc
+fi
+
+$SUDO_CMD rm -f /etc/systemd/user/sockets.target.wants/dirmngr.socket
+$SUDO_CMD rm -f /etc/systemd/user/sockets.target.wants/gpg-agent*.socket
+$SUDO_CMD rm -f /lib/systemd/system/sysinit.target.wants/proc-sys-fs-binfmt_misc.automount
+$SUDO_CMD rm -f /lib/systemd/system/sysinit.target.wants/proc-sys-fs-binfmt_misc.mount
+$SUDO_CMD rm -f /lib/systemd/system/sysinit.target.wants/systemd-binfmt.service
+
+if [ -f /proc/sys/fs/binfmt_misc/WSLInterop ] && [ "$(head -n1  /proc/sys/fs/binfmt_misc/WSLInterop)" == "enabled" ]; then
+  "$(interop_prefix)$(sysdrive_prefix)"/Windows/System32/cmd.exe /C setx WSLENV BASH_ENV/u
+  "$(interop_prefix)$(sysdrive_prefix)"/Windows/System32/cmd.exe /C setx BASH_ENV /etc/bash.bashrc
+else
+  echo
+  echo "You need to manually run the following two commands in Windows' cmd.exe:"
+  echo
+  echo "  setx WSLENV BASH_ENV/u"
+  echo "  setx BASH_ENV /etc/bash.bashrc"
+  echo
+fi