go重定向输出崩溃堆栈

• windows

  // +build windows
  
  package log
  
  import (
  	"os"
  	"syscall"
  
  	"github.com/sirupsen/logrus"
  )
  
  var (
  	crashFile        *os.File
  	kernel32         = syscall.MustLoadDLL("kernel32.dll")
  	procSetStdHandle = kernel32.MustFindProc("SetStdHandle")
  )
  
  func init() {
  	var err error
  	crashFile, err = os.OpenFile("./raysync-ftp_crash.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0664)
  	if err != nil {
  		logrus.Fatalf("open raysync-ftp_crash.log file failure: %v", err)
  	}
  	handle := syscall.STD_ERROR_HANDLE
  	syscall.Syscall(procSetStdHandle.Addr(), 2, uintptr(handle), crashFile.Fd(), 0)
  }
  
  

• linux

  // +build !windows
  
  package log
  
  import (
  	"os"
  	"syscall"
  
  	"github.com/sirupsen/logrus"
  )
  
  var crashFile *os.File
  
  func init() {
  	var err error
  	crashFile, err = os.OpenFile("./raysync-ftp_crash.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0664)
  	if err != nil {
  		logrus.Fatalf("open raysync-ftp_crash.log file failure: %v", err)
  	}
  
  	err = syscall.Dup2(int(crashFile.Fd()), int(os.Stderr.Fd()))
  	if err != nil {
  		logrus.Fatalf("dup stderr fd failure: %v", err)
  	}
  }