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https://github.com/k3s-io/k3s.git
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49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
// Copyright 2015 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package runtime implements utility functions for runtime systems.
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package runtime
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import (
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"os"
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"syscall"
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)
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func FDLimit() (uint64, error) {
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var rlimit syscall.Rlimit
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if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlimit); err != nil {
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return 0, err
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}
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return rlimit.Cur, nil
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}
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func FDUsage() (uint64, error) {
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return countFiles("/proc/self/fd")
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}
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// countFiles reads the directory named by dirname and returns the count.
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// This is same as stdlib "io/ioutil.ReadDir" but without sorting.
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func countFiles(dirname string) (uint64, error) {
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f, err := os.Open(dirname)
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if err != nil {
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return 0, err
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}
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list, err := f.Readdir(-1)
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f.Close()
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if err != nil {
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return 0, err
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}
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return uint64(len(list)), nil
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}
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