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|
package main
import (
"errors"
"flag"
"log"
"log/syslog"
"os"
"os/signal"
"path"
"syscall"
"tunnel/pkg/config"
"tunnel/pkg/server"
)
var (
debugFlag = flag.Bool("d", false, "debug: print time and source info")
syslogFlag = flag.Bool("s", false, "log output to syslog instead of stdout")
)
func initLog() {
var logFlags int
if *debugFlag {
logFlags |= log.Ldate | log.Ltime | log.Lshortfile
}
log.SetFlags(logFlags)
if *syslogFlag {
sysLog, err := syslog.New(syslog.LOG_INFO, "tunneld")
if err != nil {
log.Fatal(err)
}
log.SetOutput(sysLog)
}
}
func sighandler(c chan os.Signal, s *server.Server) {
var try bool
for sig := range c {
if try {
log.Fatal("force exit")
}
log.Printf("catch signal: %s", sig)
try = true
s.Stop()
}
}
func getSocketPath() string {
s, err := config.GetSocketPath()
if err != nil {
log.Fatal(err)
}
if err := os.Mkdir(path.Dir(s), 0700); err != nil {
if !errors.Is(err, syscall.EEXIST) {
log.Fatal(err)
}
}
return s
}
func main() {
flag.Parse()
initLog()
s, err := server.New(getSocketPath())
if err != nil {
log.Fatal(err)
}
var c = make(chan os.Signal)
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
go sighandler(c, s)
log.Print("ready")
s.Run()
log.Print("exit")
}
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