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main.go
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main.go
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// Copyright 2018 Burak Sezer
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"runtime"
"github.com/buraksezer/olric"
"github.com/buraksezer/olric/cmd/olricd/server"
"github.com/sean-/seed"
)
var usage = `olricd is the default standalone server for Olric
Usage:
olricd [flags] ...
Flags:
-h -help
Shows this screen.
-v -version
Shows version information.
-c -config
Sets configuration file path. Default is /etc/olricd.toml
Set OLRICD_CONFIG to overwrite it.
The Go runtime version %s
Report bugs to https://github.com/buraksezer/olric/issues`
var (
cpath string
showHelp bool
showVersion bool
)
func init() {
// MustInit provides guaranteed secure seeding. If `/dev/urandom` is not
// available, MustInit will panic() with an error indicating why reading from
// `/dev/urandom` failed. MustInit() will upgrade the seed if for some reason a
// call to Init() failed in the past.
seed.MustInit()
}
func main() {
// Parse command line parameters
f := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
f.SetOutput(ioutil.Discard)
f.BoolVar(&showHelp, "h", false, "")
f.BoolVar(&showHelp, "help", false, "")
f.BoolVar(&showVersion, "version", false, "")
f.BoolVar(&showVersion, "v", false, "")
f.StringVar(&cpath, "config", server.DefaultConfigFile, "")
f.StringVar(&cpath, "c", server.DefaultConfigFile, "")
if err := f.Parse(os.Args[1:]); err != nil {
log.Printf("Failed to parse flags: %v", err)
os.Exit(1)
}
if showVersion {
fmt.Printf("olricd %s with runtime %s\n", olric.ReleaseVersion, runtime.Version())
return
} else if showHelp {
msg := fmt.Sprintf(usage, runtime.Version())
fmt.Println(msg)
return
}
c, err := server.NewConfig(cpath)
if err != nil {
log.Printf("Failed to parse config file: %v", err)
os.Exit(1)
}
s, err := server.New(c)
if err != nil {
log.Printf("Failed to create a new olricd instance: %v", err)
os.Exit(1)
}
if err = s.Start(); err != nil {
log.Printf("olricd returned an error: %v", err)
os.Exit(1)
}
log.Print("Quit!")
}