ec1f89217a
Full Mattermost server source with integrated Community Enterprise features. Includes vendor directory for offline/air-gapped builds. Structure: - enterprise-impl/: Enterprise feature implementations - enterprise-community/: Init files that register implementations - enterprise/: Bridge imports (community_imports.go) - vendor/: All dependencies for offline builds Build (online): go build ./cmd/mattermost Build (offline/air-gapped): go build -mod=vendor ./cmd/mattermost 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
99 lines
3.2 KiB
Go
99 lines
3.2 KiB
Go
// Copyright 2021 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"
|
|
)
|
|
|
|
// CgroupSummary models one line from /proc/cgroups.
|
|
// This file contains information about the controllers that are compiled into the kernel.
|
|
//
|
|
// Also see http://man7.org/linux/man-pages/man7/cgroups.7.html
|
|
type CgroupSummary struct {
|
|
// The name of the controller. controller is also known as subsystem.
|
|
SubsysName string
|
|
// The unique ID of the cgroup hierarchy on which this controller is mounted.
|
|
Hierarchy int
|
|
// The number of control groups in this hierarchy using this controller.
|
|
Cgroups int
|
|
// This field contains the value 1 if this controller is enabled, or 0 if it has been disabled
|
|
Enabled int
|
|
}
|
|
|
|
// parseCgroupSummary parses each line of the /proc/cgroup file
|
|
// Line format is `subsys_name hierarchy num_cgroups enabled`.
|
|
func parseCgroupSummaryString(CgroupSummaryStr string) (*CgroupSummary, error) {
|
|
var err error
|
|
|
|
fields := strings.Fields(CgroupSummaryStr)
|
|
// require at least 4 fields
|
|
if len(fields) < 4 {
|
|
return nil, fmt.Errorf("%w: 4+ fields required, found %d fields in cgroup info string: %s", ErrFileParse, len(fields), CgroupSummaryStr)
|
|
}
|
|
|
|
CgroupSummary := &CgroupSummary{
|
|
SubsysName: fields[0],
|
|
}
|
|
CgroupSummary.Hierarchy, err = strconv.Atoi(fields[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%w: Unable to parse hierarchy ID from %q", ErrFileParse, fields[1])
|
|
}
|
|
CgroupSummary.Cgroups, err = strconv.Atoi(fields[2])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%w: Unable to parse Cgroup Num from %q", ErrFileParse, fields[2])
|
|
}
|
|
CgroupSummary.Enabled, err = strconv.Atoi(fields[3])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("%w: Unable to parse Enabled from %q", ErrFileParse, fields[3])
|
|
}
|
|
return CgroupSummary, nil
|
|
}
|
|
|
|
// parseCgroupSummary reads each line of the /proc/cgroup file.
|
|
func parseCgroupSummary(data []byte) ([]CgroupSummary, error) {
|
|
var CgroupSummarys []CgroupSummary
|
|
scanner := bufio.NewScanner(bytes.NewReader(data))
|
|
for scanner.Scan() {
|
|
CgroupSummaryString := scanner.Text()
|
|
// ignore comment lines
|
|
if strings.HasPrefix(CgroupSummaryString, "#") {
|
|
continue
|
|
}
|
|
CgroupSummary, err := parseCgroupSummaryString(CgroupSummaryString)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
CgroupSummarys = append(CgroupSummarys, *CgroupSummary)
|
|
}
|
|
|
|
err := scanner.Err()
|
|
return CgroupSummarys, err
|
|
}
|
|
|
|
// CgroupSummarys returns information about current /proc/cgroups.
|
|
func (fs FS) CgroupSummarys() ([]CgroupSummary, error) {
|
|
data, err := util.ReadFileNoStat(fs.proc.Path("cgroups"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return parseCgroupSummary(data)
|
|
}
|