github.com/lalkh/containerd@v1.4.3/sys/fds.go (about) 1 // +build !windows,!darwin 2 3 /* 4 Copyright The containerd Authors. 5 6 Licensed under the Apache License, Version 2.0 (the "License"); 7 you may not use this file except in compliance with the License. 8 You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 See the License for the specific language governing permissions and 16 limitations under the License. 17 */ 18 19 package sys 20 21 import ( 22 "io/ioutil" 23 "path/filepath" 24 "strconv" 25 ) 26 27 // GetOpenFds returns the number of open fds for the process provided by pid 28 func GetOpenFds(pid int) (int, error) { 29 dirs, err := ioutil.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "fd")) 30 if err != nil { 31 return -1, err 32 } 33 return len(dirs), nil 34 }