Merge pull request #922 from devlights/add-procfs-self

Author: devlights

examples/procfs/self/.gitignore

@@ -0,0 +1 @@
+app

examples/procfs/self/README.md

@@ -0,0 +1,13 @@
+# これは何？
+
+[procfs](https://github.com/prometheus/procfs) を使って、/procファイルシステム上の自プロセス情報を取得するサンプルです。
+
+```sh
+$ task
+task: [default] rm -f ./app
+task: [default] go build -o app .
+task: [default] ./app
+[Self] pid=21966, cmdline=[./app]
+task: [default] ./app hello world 1 2 3 4 5
+[Self] pid=21972, cmdline=[./app hello world 1 2 3 4 5]
+```

examples/procfs/self/Taskfile.yml

@@ -0,0 +1,11 @@
+# https://taskfile.dev
+
+version: '3'
+
+tasks:
+  default:
+    cmds:
+      - rm -f ./app
+      - go build -o app .
+      - ./app
+      - ./app hello world 1 2 3 4 5

examples/procfs/self/main.go

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+package main
+
+import (
+	"log"
+
+	"github.com/prometheus/procfs"
+)
+
+func main() {
+	log.SetFlags(0)
+
+	if err := run(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func run() error {
+	var (
+		p   procfs.Proc
+		err error
+	)
+	p, err = procfs.Self()
+	if err != nil {
+		return err
+	}
+
+	var (
+		cmdline []string
+	)
+	cmdline, err = p.CmdLine()
+	if err != nil {
+		return err
+	}
+
+	log.Printf("[Self] pid=%d, cmdline=%v", p.PID, cmdline)
+
+	return nil
+}