90 lines
1.5 KiB
Go
90 lines
1.5 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"io"
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"net"
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"os"
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"os/exec"
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"os/signal"
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"strings"
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"syscall"
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"github.com/creack/pty"
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)
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func main() {
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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var minram, maxram, args, stop string
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for _, e := range os.Environ() {
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pair := strings.SplitN(e, "=", 2)
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switch pair[0] {
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case "MIN_MEM":
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minram = "-Xms" + pair[1]
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case "MAX_MEM":
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maxram = "-Xmx" + pair[1]
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case "ARGS":
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args = pair[1]
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case "STOP":
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stop = pair[1]
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}
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}
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var cmd *exec.Cmd
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if args == "" {
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cmd = exec.Command("java", minram, maxram, "-jar", "server.jar")
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} else {
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cmd = exec.Command("java", minram, maxram, args, "-jar", "server.jar")
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}
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cmd.Dir = "/server"
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cmd.Stdout = os.Stdout
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tty, err := pty.Start(cmd)
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ln, _ := net.Listen("tcp", ":8081")
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if err != nil {
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panic(err)
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}
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defer func() {
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cmd.Process.Kill()
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cmd.Process.Wait()
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tty.Close()
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ln.Close()
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}()
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go func() {
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sig := <-sigs
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if sig == syscall.SIGTERM || sig == syscall.SIGINT {
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fmt.Println("Stopping server")
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tty.WriteString(stop + "\n\r")
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}
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}()
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go func() {
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//accept connections from clients
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for {
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conn, err := ln.Accept()
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if err != nil {
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continue
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}
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go handleClient(conn, tty)
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}
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}()
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go func() {
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io.Copy(tty, os.Stdin)
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}()
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cmd.Wait()
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os.Exit(0)
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}
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func handleClient(conn net.Conn, tty *os.File) {
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defer conn.Close()
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cmd, _ := bufio.NewReader(conn).ReadString('\n')
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tty.Write([]byte(cmd))
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}
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