From 598653a4cc89d5588315607a367a87083b73da7c Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Sun, 4 Oct 2020 23:28:23 +0200
Subject: initial

---
 runner.sh | 109 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100755 runner.sh

(limited to 'runner.sh')

diff --git a/runner.sh b/runner.sh
new file mode 100755
index 0000000..1ec1fbc
--- /dev/null
+++ b/runner.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+
+# Minecraft Java runner script
+
+function stop() {
+	running || exit 0
+	test -p stdin || exit 1
+	echo stop > stdin
+
+	>&2 echo -n Waiting for server to stop
+	while kill -s 0 $PID > /dev/null 2>&1; do
+		sleep 1
+		>&2 echo -n .
+	done
+
+	>&2 echo Done!
+
+	rm server.pid stdin
+
+	exit 0
+}
+
+function start() {
+	running && fail "Server appears to already be running. PID: $PID"
+
+	[ -z "$JVMARGS" ] && echo 'WARNING: $JVMARGS not set'
+	[ -e stdin -a ! -p stdin ] && rm stdin
+
+	mkfifo stdin
+
+	"$JAVA" $JVMARGS -jar "$MCJAR" -nogui $MCARGS \
+		< <(while [ -p stdin ]; do timeout 10s cat stdin; done) \
+		> /dev/null &
+	PID=$!
+
+	echo $PID > server.pid
+	echo "Started server with PID $PID"
+
+	exit 0
+}
+
+function attach() {
+	running || fail "Server is not running."
+	
+	echo "CTRL-D (EOF) to exit."
+
+	tail -f logs/latest.log &
+	TAILPID=$!
+
+	while read line; do
+		echo "$line" > stdin
+	done
+
+	kill -s SIGKILL $TAILPID
+	
+	exit 0
+}
+
+function running() {
+	[ -e server.pid ] || return 1
+
+	PID=$(cat server.pid)
+	kill -s 0 $PID && return 0
+
+	rm server.pid stdin
+	return 1
+} > /dev/null 2>&1
+
+function fail() {
+	>&2 echo $@
+	exit 1
+}
+
+function stdin_redirector(){
+	while [ -p stdin ]; do
+		cat stdin
+	done
+}
+
+[ -e settings.sh ] && source settings.sh \
+	|| >&2 echo "WARNING: settings.sh not found."
+# settings.sh
+# JVMARGS, JAVA, MCARGS, MCJAR
+
+JAVA=${JAVA:-java}
+MCJAR=${MCJAR:-server.jar}
+
+which "$JAVA" > /dev/null 2>&1 || fail "No java executable."
+
+case $1 in
+	start)
+		start;;
+	stop)
+		stop;;
+	status)
+		running || fail "Server is not running."
+		>&2 echo "Server is running"
+		exit 0;;
+	attach)
+		attach;;
+	command)
+		running || fail "Server is not running."
+		shift
+		echo $@ > stdin;;
+	*)
+		>&2 echo "Minecraft Java server runner"
+		>&2 echo "$0 start|stop|status|attach|command ..."
+		fail "Invalid argument $1"
+esac
-- 
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