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// Copyright 2020 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"
"os"
"path/filepath"
"strconv"
"strings"
)
// NetStat contains statistics for all the counters from one file
type NetStat struct {
Filename string
Stats map[string][]uint64
}
// NetStat retrieves stats from /proc/net/stat/
func (fs FS) NetStat() ([]NetStat, error) {
statFiles, err := filepath.Glob(fs.proc.Path("net/stat/*"))
if err != nil {
return nil, err
}
var netStatsTotal []NetStat
for _, filePath := range statFiles {
file, err := os.Open(filePath)
if err != nil {
return nil, err
}
netStatFile := NetStat{
Filename: filepath.Base(filePath),
Stats: make(map[string][]uint64),
}
scanner := bufio.NewScanner(file)
scanner.Scan()
// First string is always a header for stats
var headers []string
headers = append(headers, strings.Fields(scanner.Text())...)
// Other strings represent per-CPU counters
for scanner.Scan() {
for num, counter := range strings.Fields(scanner.Text()) {
value, err := strconv.ParseUint(counter, 16, 32)
if err != nil {
return nil, err
}
netStatFile.Stats[headers[num]] = append(netStatFile.Stats[headers[num]], value)
}
}
netStatsTotal = append(netStatsTotal, netStatFile)
}
return netStatsTotal, nil
}
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