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package main
import (
"context"
"flag"
"fmt"
"net/http"
_ "net/http"
_ "net/http/pprof"
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/mimecast/dtail/internal/config"
"github.com/mimecast/dtail/internal/io/dlog"
"github.com/mimecast/dtail/internal/server"
"github.com/mimecast/dtail/internal/source"
"github.com/mimecast/dtail/internal/user"
"github.com/mimecast/dtail/internal/version"
)
// The evil begins here.
func main() {
var args config.Args
var color bool
var displayVersion bool
var pprof int
var shutdownAfter int
user.NoRootCheck()
flag.BoolVar(&color, "color", false, "Enable ANSII terminal colors")
flag.BoolVar(&config.ServerRelaxedAuthEnable, "relaxedAuth", false,
"Enable relaxced SSH auth mode (don't use in production!)")
flag.BoolVar(&displayVersion, "version", false, "Display version")
flag.IntVar(&args.SSHPort, "port", config.DefaultSSHPort, "SSH server port")
flag.IntVar(&pprof, "pprof", -1, "Start PProf server this port")
flag.IntVar(&shutdownAfter, "shutdownAfter", 0, "Shutdown after so many seconds")
flag.StringVar(&args.ConfigFile, "cfg", "", "Config file path")
flag.StringVar(&args.LogDir, "logDir", "", "Log dir")
flag.StringVar(&args.LogLevel, "logLevel", config.DefaultLogLevel, "Log level")
flag.StringVar(&args.Logger, "logger", config.DefaultServerLogger, "Logger name")
flag.StringVar(&args.SSHBindAddress, "bindAddress", "", "The SSH bind address")
flag.Parse()
args.NoColor = !color
config.Setup(source.Server, &args, flag.Args())
if displayVersion {
version.PrintAndExit()
}
version.Print()
ctx, cancel := context.WithCancel(context.Background())
if shutdownAfter > 0 {
ctx, cancel = context.WithTimeout(ctx, time.Duration(shutdownAfter)*time.Second)
}
sigCh := make(chan os.Signal)
signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
go func() {
select {
case <-sigCh:
cancel()
case <-ctx.Done():
}
}()
var wg sync.WaitGroup
wg.Add(1)
dlog.Start(ctx, &wg, source.Server)
if config.ServerRelaxedAuthEnable {
dlog.Server.Fatal("SSH relaxed-auth mode enabled")
}
if pprof > -1 {
// Start of pprof server for development purposes only.
pprofArgs := fmt.Sprintf("0.0.0.0:%d", pprof)
dlog.Server.Info("Starting PProf", pprofArgs)
go http.ListenAndServe(pprofArgs, nil)
}
serv := server.New()
status := serv.Start(ctx)
cancel()
wg.Wait()
os.Exit(status)
}
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