mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-27 15:30:23 +00:00
39 lines
1.2 KiB
Go
39 lines
1.2 KiB
Go
|
// Copyright 2019 The Prometheus Authors
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package util
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"io/ioutil"
|
||
|
|
"os"
|
||
|
|
)
|
||
|
|
|
||
|
|
// ReadFileNoStat uses ioutil.ReadAll to read contents of entire file.
|
||
|
|
// This is similar to ioutil.ReadFile but without the call to os.Stat, because
|
||
|
|
// many files in /proc and /sys report incorrect file sizes (either 0 or 4096).
|
||
|
|
// Reads a max file size of 512kB. For files larger than this, a scanner
|
||
|
|
// should be used.
|
||
|
|
func ReadFileNoStat(filename string) ([]byte, error) {
|
||
|
|
const maxBufferSize = 1024 * 512
|
||
|
|
|
||
|
|
f, err := os.Open(filename)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
defer f.Close()
|
||
|
|
|
||
|
|
reader := io.LimitReader(f, maxBufferSize)
|
||
|
|
return ioutil.ReadAll(reader)
|
||
|
|
}
|