mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
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d5c180e680
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.
69 lines
1.9 KiB
Go
69 lines
1.9 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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"fmt"
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"os"
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"strconv"
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"strings"
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)
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// Namespace represents a single namespace of a process.
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type Namespace struct {
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Type string // Namespace type.
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Inode uint32 // Inode number of the namespace. If two processes are in the same namespace their inodes will match.
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}
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// Namespaces contains all of the namespaces that the process is contained in.
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type Namespaces map[string]Namespace
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// Namespaces reads from /proc/<pid>/ns/* to get the namespaces of which the
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// process is a member.
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func (p Proc) Namespaces() (Namespaces, error) {
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d, err := os.Open(p.path("ns"))
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if err != nil {
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return nil, err
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}
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defer d.Close()
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names, err := d.Readdirnames(-1)
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if err != nil {
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return nil, fmt.Errorf("failed to read contents of ns dir: %v", err)
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}
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ns := make(Namespaces, len(names))
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for _, name := range names {
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target, err := os.Readlink(p.path("ns", name))
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if err != nil {
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return nil, err
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}
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fields := strings.SplitN(target, ":", 2)
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if len(fields) != 2 {
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return nil, fmt.Errorf("failed to parse namespace type and inode from '%v'", target)
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}
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typ := fields[0]
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inode, err := strconv.ParseUint(strings.Trim(fields[1], "[]"), 10, 32)
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if err != nil {
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return nil, fmt.Errorf("failed to parse inode from '%v': %v", fields[1], err)
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}
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ns[name] = Namespace{typ, uint32(inode)}
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}
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return ns, nil
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}
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