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crashclient.go
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crashclient.go
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// Copyright (C) 2017 go-nebulas authors
//
// This file is part of the go-nebulas library.
//
// the go-nebulas library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// the go-nebulas library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with the go-nebulas library. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"fmt"
"math/rand"
"net"
"os"
"os/exec"
"path/filepath"
"strconv"
"syscall"
"github.com/nebulasio/go-nebulas/neblet/pb"
"github.com/nebulasio/go-nebulas/util/logging"
"github.com/sirupsen/logrus"
)
// InitCrashReporter init crash reporter
func InitCrashReporter(conf *nebletpb.AppConfig) {
os.Setenv("GOBACKTRACE", "crash")
dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
if err != nil {
logging.CLog().WithFields(logrus.Fields{
"err": err,
}).Fatal("Failed to init crash reporter.")
}
fp := fmt.Sprintf("%vcrash_%v.log", os.TempDir(), os.Getpid())
port := rand.Intn(0xFFFF-1024) + 1024
s, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
for i := 0; i < 0xff; i++ {
if err != nil {
port = rand.Intn(0xFFFF-1024) + 1024
s, err = net.Listen("tcp", fmt.Sprintf(":%d", port))
} else {
break
}
}
if err != nil {
logging.CLog().WithFields(logrus.Fields{
"err": err,
}).Fatal("Failed to init crash reporter.")
}
defer s.Close()
code := rand.Intn(0xFFFF)
cmd := exec.Command(fmt.Sprintf("%v/neb-crashreporter", dir),
"-logfile",
fp,
"-port",
strconv.Itoa(port),
"-code",
strconv.Itoa(code),
"-pid",
strconv.Itoa(os.Getpid()),
"-url",
conf.CrashReportUrl)
err = cmd.Start()
if err != nil {
logging.CLog().WithFields(logrus.Fields{
"err": err,
}).Fatal("Failed to start crash reporter daemon.")
}
conn, err := s.Accept()
if err != nil {
logging.CLog().WithFields(logrus.Fields{
"err": err,
}).Fatal("Failed to init crash reporter.")
}
var buf = make([]byte, 10)
n, berror := conn.Read(buf)
if berror != nil {
logging.CLog().WithFields(logrus.Fields{
"err": berror,
}).Fatal("Failed to read from conn")
}
rs := string(buf[:n])
if rs == strconv.Itoa(code) {
if crashFile, err := os.OpenFile(fp, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0664); err == nil {
os.Stderr = crashFile
syscall.Dup2(int(crashFile.Fd()), 2)
}
} else {
logging.CLog().WithFields(logrus.Fields{
"rs": rs,
"code": code,
"err": "code not match",
}).Fatal("Failed to init crash reporter.")
}
logging.CLog().Info("Started crash reporter.")
}