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#!/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 $@
exit 1
}
[ -e settings.sh ] && source settings.sh \
|| >&2 echo "WARNING: settings.sh not found."
# settings.sh
# JVMARGS, JAVA, MCARGS, MCJAR
JAVA=${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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