blob: 8e9359db28ca1f1aea48eba7d1063c019261581c [file] [log] [blame]
khenaidoo59ce9dd2019-11-11 13:05:32 -05001// Copyright 2015 The etcd Authors
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// Package runtime implements utility functions for runtime systems.
16package runtime
17
18import (
19 "io/ioutil"
20 "syscall"
21)
22
23func FDLimit() (uint64, error) {
24 var rlimit syscall.Rlimit
25 if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
26 return 0, err
27 }
28 return rlimit.Cur, nil
29}
30
31func FDUsage() (uint64, error) {
32 fds, err := ioutil.ReadDir("/proc/self/fd")
33 if err != nil {
34 return 0, err
35 }
36 return uint64(len(fds)), nil
37}