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* fix doc build issues * add changelog * move tests to linux-only (cherry picked from commit b906aab) Co-authored-by: Alex K <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| // Licensed to Elasticsearch B.V. under one or more contributor | ||
| // license agreements. See the NOTICE file distributed with | ||
| // this work for additional information regarding copyright | ||
| // ownership. Elasticsearch B.V. licenses this file to you 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. | ||
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| package memory | ||
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| import ( | ||
| "bufio" | ||
| "bytes" | ||
| "io" | ||
| "io/ioutil" | ||
| "path/filepath" | ||
| "strconv" | ||
| "strings" | ||
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| "github.com/pkg/errors" | ||
| ) | ||
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| // ParseMeminfo parses the contents of /proc/meminfo into a hashmap | ||
| func ParseMeminfo(rootfs string) (map[string]uint64, error) { | ||
| table := map[string]uint64{} | ||
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| meminfoPath := filepath.Join(rootfs, "/proc/meminfo") | ||
| err := readFile(meminfoPath, func(line string) bool { | ||
| fields := strings.Split(line, ":") | ||
|
|
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| if len(fields) != 2 { | ||
| return true // skip on errors | ||
| } | ||
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| valueUnit := strings.Fields(fields[1]) | ||
| value, err := strconv.ParseUint(valueUnit[0], 10, 64) | ||
| if err != nil { | ||
| return true // skip on errors | ||
| } | ||
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| if len(valueUnit) > 1 && valueUnit[1] == "kB" { | ||
| value *= 1024 | ||
| } | ||
| table[fields[0]] = value | ||
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| return true | ||
| }) | ||
| return table, err | ||
| } | ||
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| func readFile(file string, handler func(string) bool) error { | ||
| contents, err := ioutil.ReadFile(file) | ||
| if err != nil { | ||
| return errors.Wrapf(err, "error reading file %s", file) | ||
| } | ||
|
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| reader := bufio.NewReader(bytes.NewBuffer(contents)) | ||
|
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| for { | ||
| line, _, err := reader.ReadLine() | ||
| if err == io.EOF { | ||
| break | ||
| } | ||
| if !handler(string(line)) { | ||
| break | ||
| } | ||
| } | ||
|
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| return nil | ||
| } |
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