mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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7f4fb34182
It is better developing vmctl tool in VictoriaMetrics repository, so it could be released together with the rest of vmutils tools such as vmalert, vmagent, vmbackup, vmrestore and vmauth.
90 lines
2.2 KiB
Go
90 lines
2.2 KiB
Go
// Copyright 2019 The Prometheus Authors
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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 procfs
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import (
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"bufio"
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"bytes"
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"fmt"
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"strconv"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// Swap represents an entry in /proc/swaps.
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type Swap struct {
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Filename string
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Type string
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Size int
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Used int
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Priority int
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}
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// Swaps returns a slice of all configured swap devices on the system.
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func (fs FS) Swaps() ([]*Swap, error) {
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data, err := util.ReadFileNoStat(fs.proc.Path("swaps"))
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if err != nil {
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return nil, err
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}
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return parseSwaps(data)
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}
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func parseSwaps(info []byte) ([]*Swap, error) {
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swaps := []*Swap{}
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scanner := bufio.NewScanner(bytes.NewReader(info))
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scanner.Scan() // ignore header line
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for scanner.Scan() {
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swapString := scanner.Text()
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parsedSwap, err := parseSwapString(swapString)
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if err != nil {
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return nil, err
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}
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swaps = append(swaps, parsedSwap)
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}
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err := scanner.Err()
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return swaps, err
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}
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func parseSwapString(swapString string) (*Swap, error) {
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var err error
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swapFields := strings.Fields(swapString)
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swapLength := len(swapFields)
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if swapLength < 5 {
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return nil, fmt.Errorf("too few fields in swap string: %s", swapString)
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}
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swap := &Swap{
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Filename: swapFields[0],
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Type: swapFields[1],
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}
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swap.Size, err = strconv.Atoi(swapFields[2])
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if err != nil {
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return nil, fmt.Errorf("invalid swap size: %s", swapFields[2])
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}
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swap.Used, err = strconv.Atoi(swapFields[3])
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if err != nil {
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return nil, fmt.Errorf("invalid swap used: %s", swapFields[3])
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}
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swap.Priority, err = strconv.Atoi(swapFields[4])
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if err != nil {
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return nil, fmt.Errorf("invalid swap priority: %s", swapFields[4])
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}
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return swap, nil
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}
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