golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1: unix.Uname

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.Uname in pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1
Demonstrate these symbols/APIs:
  - golang.org/x/sys/unix.Uname

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:sha256:93fe4eb0e653e014a349d9327c875b01bbba612205455849e1654ac15ad307c0","contract":["unix.Uname populates Utsname structure with system information"],"goal":"verify golang.org/x/sys/unix.Uname in pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.Uname"]},"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@v0.0.0-20210615035016-665e8c7367d1"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1","symbols":["golang.org/x/sys/unix.Uname"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.22.0

require golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1

golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

package main

import (
	"bytes"
	"fmt"
	"os"

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

// GetSystemUtsname returns the system utsname struct.
func GetSystemUtsname() (unix.Utsname, error) {
	var uts unix.Utsname
	if err := unix.Uname(&uts); err != nil {
		return uts, fmt.Errorf("uname failed: %w", err)
	}
	return uts, nil
}

func byteSliceToString(b []byte) string {
	n := bytes.IndexByte(b, 0)
	if n < 0 {
		n = len(b)
	}
	return string(b[:n])
}

func main() {
	uts, err := GetSystemUtsname()
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error getting uname: %v\n", err)
		os.Exit(1)
	}

	sysname := byteSliceToString(uts.Sysname[:])
	nodename := byteSliceToString(uts.Nodename[:])
	release := byteSliceToString(uts.Release[:])
	version := byteSliceToString(uts.Version[:])
	machine := byteSliceToString(uts.Machine[:])

	fmt.Printf("Sysname: %s\n", sysname)
	fmt.Printf("Nodename: %s\n", nodename)
	fmt.Printf("Release: %s\n", release)
	fmt.Printf("Version: %s\n", version)
	fmt.Printf("Machine: %s\n", machine)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.Uname in pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.0.0-20210615035016-665e8c7367d1"
  ],
  "symbols": [
    "golang.org/x/sys/unix.Uname"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	// Assertion 1: unix.Uname populates Utsname structure with system information
	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)
	}

	var nonZeroSysname bool
	for _, b := range uts.Sysname {
		if b != 0 {
			nonZeroSysname = true
			break
		}
	}
	if !nonZeroSysname {
		fmt.Fprintf(os.Stderr, "FAIL: unix.Uname returned all-zero Sysname\n")
		os.Exit(1)
	}

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