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   1 // +build linux freebsd
   2
   3 package fileutils
   4
   5 import (
   6         "fmt"
   7         "io/ioutil"
   8         "os"
   9
  10         "github.com/fsouza/go-dockerclient/external/github.com/Sirupsen/logrus"
  11 )
  12
  13 // GetTotalUsedFds Returns the number of used File Descriptors by
  14 // reading it via /proc filesystem.
  15 func GetTotalUsedFds() int {
  16         if fds, err := ioutil.ReadDir(fmt.Sprintf("/proc/%d/fd", os.Getpid())); err != nil {
  17                 logrus.Errorf("Error opening /proc/%d/fd: %s", os.Getpid(), err)
  18         } else {
  19                 return len(fds)
  20         }
  21         return -1
  22 }