forked from toolshed/abra
97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
// Copyright 2018 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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"errors"
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"io"
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"os"
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"strconv"
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"strings"
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)
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// NetDevSNMP6 is parsed from files in /proc/net/dev_snmp6/ or /proc/<PID>/net/dev_snmp6/.
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// The outer map's keys are interface names and the inner map's keys are stat names.
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//
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// If you'd like a total across all interfaces, please use the Snmp6() method of the Proc type.
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type NetDevSNMP6 map[string]map[string]uint64
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// Returns kernel/system statistics read from interface files within the /proc/net/dev_snmp6/
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// directory.
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func (fs FS) NetDevSNMP6() (NetDevSNMP6, error) {
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return newNetDevSNMP6(fs.proc.Path("net/dev_snmp6"))
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}
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// Returns kernel/system statistics read from interface files within the /proc/<PID>/net/dev_snmp6/
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// directory.
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func (p Proc) NetDevSNMP6() (NetDevSNMP6, error) {
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return newNetDevSNMP6(p.path("net/dev_snmp6"))
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}
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// newNetDevSNMP6 creates a new NetDevSNMP6 from the contents of the given directory.
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func newNetDevSNMP6(dir string) (NetDevSNMP6, error) {
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netDevSNMP6 := make(NetDevSNMP6)
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// The net/dev_snmp6 folders contain one file per interface
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ifaceFiles, err := os.ReadDir(dir)
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if err != nil {
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// On systems with IPv6 disabled, this directory won't exist.
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// Do nothing.
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if errors.Is(err, os.ErrNotExist) {
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return netDevSNMP6, err
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}
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return netDevSNMP6, err
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}
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for _, iFaceFile := range ifaceFiles {
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f, err := os.Open(dir + "/" + iFaceFile.Name())
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if err != nil {
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return netDevSNMP6, err
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}
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defer f.Close()
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netDevSNMP6[iFaceFile.Name()], err = parseNetDevSNMP6Stats(f)
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if err != nil {
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return netDevSNMP6, err
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}
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}
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return netDevSNMP6, nil
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}
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func parseNetDevSNMP6Stats(r io.Reader) (map[string]uint64, error) {
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m := make(map[string]uint64)
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scanner := bufio.NewScanner(r)
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for scanner.Scan() {
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stat := strings.Fields(scanner.Text())
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if len(stat) < 2 {
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continue
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}
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key, val := stat[0], stat[1]
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// Expect stat name to contain "6" or be "ifIndex"
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if strings.Contains(key, "6") || key == "ifIndex" {
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v, err := strconv.ParseUint(val, 10, 64)
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if err != nil {
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return m, err
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}
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m[key] = v
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}
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}
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return m, scanner.Err()
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}
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