/
util.go
53 lines (45 loc) · 1.47 KB
/
util.go
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/*
Copyright 2020 The OpenEBS 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 sysfs
import (
"io/ioutil"
"path/filepath"
"strconv"
"strings"
)
// readSysFSFileAsInt64 reads a file and
// converts that content into int64
func readSysFSFileAsInt64(sysFilePath string) (int64, error) {
b, err := ioutil.ReadFile(filepath.Clean(sysFilePath))
if err != nil {
return 0, err
}
// Remove tailing newline (usual in sysfs) before parsing
return strconv.ParseInt(strings.TrimSuffix(string(b), "\n"), 10, 64)
}
func readSysFSFileAsString(sysFilePath string) (string, error) {
b, err := ioutil.ReadFile(filepath.Clean(sysFilePath))
if err != nil {
return "", err
}
// Remove tailing newline (usual in sysfs)
return strings.TrimSuffix(string(b), "\n"), nil
}
// addDevPrefix adds the /dev prefix to all the device names
func addDevPrefix(devNames []string) []string {
result := make([]string, 0)
for _, devName := range devNames {
result = append(result, "/dev/"+devName)
}
return result
}