mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
// Copyright 2015 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 collector
|
|
|
|
import (
|
|
"bytes"
|
|
"io/ioutil"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
func readUintFromFile(path string) (uint64, error) {
|
|
data, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
value, err := strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return value, nil
|
|
}
|
|
|
|
// Take a []byte{} and return a string based on null termination.
|
|
// This is useful for situations where the OS has returned a null terminated
|
|
// string to use.
|
|
// If this function happens to receive a byteArray that contains no nulls, we
|
|
// simply convert the array to a string with no bounding.
|
|
func bytesToString(byteArray []byte) string {
|
|
n := bytes.IndexByte(byteArray, 0)
|
|
if n < 0 {
|
|
return string(byteArray)
|
|
}
|
|
return string(byteArray[:n])
|
|
}
|