package fileutils // import "github.com/docker/docker/pkg/fileutils" import ( "os" "os/exec" "strconv" "strings" ) // GetTotalUsedFds returns the number of used File Descriptors by // executing `lsof -p PID` func GetTotalUsedFds() int { pid := os.Getpid() cmd := exec.Command("lsof", "-p", strconv.Itoa(pid)) output, err := cmd.CombinedOutput() if err != nil { return -1 } outputStr := strings.TrimSpace(string(output)) fds := strings.Split(outputStr, "\n") return len(fds) - 1 }