github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/pkg/fileutils/fileutils_unix.go (about) 1 // +build linux freebsd 2 3 package fileutils // import "github.com/demonoid81/moby/pkg/fileutils" 4 5 import ( 6 "fmt" 7 "io/ioutil" 8 "os" 9 10 "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 }