80 lines
1.7 KiB
Bash
Executable File
80 lines
1.7 KiB
Bash
Executable File
#!/bin/sh
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# If exists tmux session
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# If Responds to queries
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SERVER_DIR='/home/ubuntu/minecraft/servers/kincls'
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TMUX_NAME='minecraft kincls server'
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EMPTY_COUNTER="$SERVER_DIR/empty_counter.txt"
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json_parse() {
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cat - | python3 -c "import sys, json; print(json.load(sys.stdin)['$1'])"
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}
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silent_exitcode() {
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$* > /dev/null 2>&1
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}
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empty_count() {
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if [ ! -f "$EMPTY_COUNTER" ]; then
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# File not existing
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echo "0"
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else
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cat "$EMPTY_COUNTER"
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fi
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}
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empty_incr() {
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c="$(empty_count)"
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if [ "$c" -gt 10 ]; then
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echo "Server empty for more than 10 minutes, shutting down"
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empty_reset # Needs to be 0 next time server starts
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tmux send-keys -t "$TMUX_NAME.0" "stop" ENTER
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sleep 5
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$(sudo /sbin/shutdown -P +1)
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else
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echo "Empty count $c. Incrementing"
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echo "$((c+1))" > "$EMPTY_COUNTER"
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fi
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}
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empty_reset() {
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echo "Resetting empty counter"
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echo 0 > "$EMPTY_COUNTER"
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}
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tmux_running() {
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tmux ls -F "#{session_name}" | grep -q "$TMUX_NAME"
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}
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server_responsive() {
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silent_exitcode mcstatus localhost ping
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}
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n_logins="$(w -h | wc -l)"
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echo "$(date) [$n_logins logins]"
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if tmux_running; then
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: #echo "Tmux running"
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else
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echo "Tmux not running"
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empty_incr
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exit 1
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fi
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if server_responsive; then
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n_players=$(mcstatus localhost json | json_parse player_count)
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echo "Server responsive. $n_players players online"
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if [ "$n_players" -gt 0 ] || [ "$n_logins" -gt 0 ]; then
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# Keep alive if players or ssh sessions active
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empty_reset
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else
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empty_incr
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exit 1
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fi
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else
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echo "Server unresponsive"
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empty_incr
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exit 1
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fi
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