// +build linux freebsd
 
 package fileutils
 
 import (
 	"fmt"
 	"io/ioutil"
 	"os"
 

 	"github.com/sirupsen/logrus"

 )
 
 // GetTotalUsedFds Returns the number of used File Descriptors by
 // reading it via /proc filesystem.
 func GetTotalUsedFds() int {
 	if fds, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/fd", os.Getpid())); err != nil {
 		logrus.Errorf("Error opening /proc/%d/fd: %s", os.Getpid(), err)
 	} else {
 		return len(fds)
 	}
 	return -1
 }