Shutdown services gracefully

Dockerfile.m4

@@ -50,12 +50,14 @@ RUN export DEBIAN_FRONTEND=noninteractive \
 	&& apt-get update \
 	&& apt-get install -y --no-install-recommends \
 		net-tools \
+		netcat-openbsd \
 		procps \
 		python3 \
 		qemu-kvm \
 		qemu-system-x86 \
 		qemu-utils \
 		runit \
+		tini \
 	&& rm -rf /var/lib/apt/lists/*
 
 # Environment
@@ -90,4 +92,4 @@ COPY --chown=root:root ./scripts/bin/ /usr/local/bin/
 RUN find /usr/local/bin/ -type d -not -perm 0755 -exec chmod 0755 '{}' ';'
 RUN find /usr/local/bin/ -type f -not -perm 0755 -exec chmod 0755 '{}' ';'
 
-ENTRYPOINT ["/usr/local/bin/container-init"]
+ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/container-init"]

scripts/bin/container-init

@@ -7,5 +7,16 @@ if [ ! -f /var/lib/qemu/images/reactos.img ]; then
 	qemu-img create -f qcow2 /var/lib/qemu/images/reactos.img "${VM_DISK_SIZE:?}"
 fi
 
-# Start all services
-exec runsvdir -P /etc/service/
+stop() {
+	for s in "${SVDIR:?}"/*; do sv force-stop "${s:?}" >/dev/null 2>&1; done
+	kill -HUP "${RUNSVDIRPID:?}"; wait "${RUNSVDIRPID:?}"
+}
+trap stop EXIT TERM INT HUP
+
+if [ "$#" -gt 0 ] || [ -t 0 ] || [ -t 1 ]; then
+	runsvdir -P "${SVDIR:?}" >/dev/null 2>&1 & RUNSVDIRPID=$!
+	"$@"
+else
+	runsvdir -P "${SVDIR:?}" & RUNSVDIRPID=$!
+	wait "${RUNSVDIRPID:?}"
+fi

scripts/service/qemu/control/t

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+set -eu
+
+printf '%s\n' 'system_powerdown' | nc -U /run/qemu-monitor

scripts/service/qemu/run

@@ -4,7 +4,7 @@ set -eu
 
 set --
 set -- "$@" -smp "${VM_CPU:?}" -m "${VM_RAM:?}"
-set -- "$@" -serial stdio -device VGA -display vnc=:0
+set -- "$@" -serial stdio -monitor unix:/run/qemu-monitor,server,nowait -device VGA -display vnc=:0
 set -- "$@" -drive file=/var/lib/qemu/images/reactos.img,index=0,media=disk,format=qcow2
 set -- "$@" -drive file=/var/lib/qemu/iso/reactos.iso,index=2,media=cdrom,format=raw
 set -- "$@" -boot order="${VM_BOOT_ORDER:?}",menu=off