golang.org/x/sys v0.0.0-20210104204734-6f8348627aad: unix.Utsname

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify golang.org/x/sys/unix.Utsname in pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad
Demonstrate these symbols/APIs:
  - golang.org/x/sys/unix.Utsname

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:4941928fd640ee3f8163f5dec0e0ce72b1098a82dc6472e2dee11da5ed069307","contract":["unix.Uname populates unix.Utsname structure with non-empty system metadata","unix.ByteSliceToString decodes unix.Utsname Sysname into a non-empty string","unix.Utsname Machine field decodes to a non-empty machine architecture","unix.Utsname Release field decodes to a valid OS kernel release string"],"goal":"verify golang.org/x/sys/unix.Utsname in pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.Utsname"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad","symbols":["golang.org/x/sys/unix.Utsname"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.22.0

require golang.org/x/sys v0.0.0-20210104204734-6f8348627aad

golang.org/x/sys v0.0.0-20210104204734-6f8348627aad h1:MCsdmFSdEd4UEa5TKS5JztCRHK/WtvNei1edOj5RSRo=
golang.org/x/sys v0.0.0-20210104204734-6f8348627aad/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

package main

import (
	"fmt"
	"os"

	"golang.org/x/sys/unix"
)

func main() {
	var uts unix.Utsname
	if err := unix.Uname(&uts); err != nil {
		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
		os.Exit(1)
	}

	fmt.Printf("Sysname: %s\n", unix.ByteSliceToString(uts.Sysname[:]))
	fmt.Printf("Machine: %s\n", unix.ByteSliceToString(uts.Machine[:]))
	fmt.Printf("Release: %s\n", unix.ByteSliceToString(uts.Release[:]))
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.Utsname in pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.0.0-20210104204734-6f8348627aad"
  ],
  "symbols": [
    "golang.org/x/sys/unix.Utsname"
  ]
}

package main

import (
	"fmt"
	"os"
	"strings"

	"golang.org/x/sys/unix"
)

func main() {
	var uts unix.Utsname
	if err := unix.Uname(&uts); err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: unix.Uname failed: %v\n", err)
		os.Exit(1)
	}

	sysname := unix.ByteSliceToString(uts.Sysname[:])
	if strings.TrimSpace(sysname) == "" {
		fmt.Fprintf(os.Stderr, "FAIL: Sysname string is empty\n")
		os.Exit(1)
	}

	machine := unix.ByteSliceToString(uts.Machine[:])
	if strings.TrimSpace(machine) == "" {
		fmt.Fprintf(os.Stderr, "FAIL: Machine string is empty\n")
		os.Exit(1)
	}

	release := unix.ByteSliceToString(uts.Release[:])
	if strings.TrimSpace(release) == "" {
		fmt.Fprintf(os.Stderr, "FAIL: Release string is empty\n")
		os.Exit(1)
	}

	fmt.Println("PASS: golang.org/x/sys/unix.Utsname contract passed")
}