a3bf13711c
I had to run `make generate`. Some API functions got additional parameters `Options` and `Context`. I used empty options and `context.TODO()` for now. Signed-off-by: leonnicolas <leonloechner@gmx.de>
90 lines
2.2 KiB
Go
90 lines
2.2 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 procfs
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/procfs/internal/util"
|
|
)
|
|
|
|
// Swap represents an entry in /proc/swaps.
|
|
type Swap struct {
|
|
Filename string
|
|
Type string
|
|
Size int
|
|
Used int
|
|
Priority int
|
|
}
|
|
|
|
// Swaps returns a slice of all configured swap devices on the system.
|
|
func (fs FS) Swaps() ([]*Swap, error) {
|
|
data, err := util.ReadFileNoStat(fs.proc.Path("swaps"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return parseSwaps(data)
|
|
}
|
|
|
|
func parseSwaps(info []byte) ([]*Swap, error) {
|
|
swaps := []*Swap{}
|
|
scanner := bufio.NewScanner(bytes.NewReader(info))
|
|
scanner.Scan() // ignore header line
|
|
for scanner.Scan() {
|
|
swapString := scanner.Text()
|
|
parsedSwap, err := parseSwapString(swapString)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
swaps = append(swaps, parsedSwap)
|
|
}
|
|
|
|
err := scanner.Err()
|
|
return swaps, err
|
|
}
|
|
|
|
func parseSwapString(swapString string) (*Swap, error) {
|
|
var err error
|
|
|
|
swapFields := strings.Fields(swapString)
|
|
swapLength := len(swapFields)
|
|
if swapLength < 5 {
|
|
return nil, fmt.Errorf("too few fields in swap string: %s", swapString)
|
|
}
|
|
|
|
swap := &Swap{
|
|
Filename: swapFields[0],
|
|
Type: swapFields[1],
|
|
}
|
|
|
|
swap.Size, err = strconv.Atoi(swapFields[2])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid swap size: %s", swapFields[2])
|
|
}
|
|
swap.Used, err = strconv.Atoi(swapFields[3])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid swap used: %s", swapFields[3])
|
|
}
|
|
swap.Priority, err = strconv.Atoi(swapFields[4])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid swap priority: %s", swapFields[4])
|
|
}
|
|
|
|
return swap, nil
|
|
}
|