golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71: 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@v0.0.0-20220406155245-289d7a0edf71
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71
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:sha256:66dcf67fada626f211d8ea57c9d9ff21781e69d8187ca1786ee0305ae10ff34b","contract":["unix.Uname populates Utsname structure with system information"],"goal":"verify golang.org/x/sys/unix.Uname in pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71"],"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@v0.0.0-20220406155245-289d7a0edf71"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71","symbols":["golang.org/x/sys/unix.Uname"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.22.0

require golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71

golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71 h1:PRD0hj6tTuUnCFD08vkvjkYFbQg/9lV8KIxe1y4/cvU=
golang.org/x/sys v0.0.0-20220406155245-289d7a0edf71/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

package main

import (
	"fmt"
	"os"

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

// GetSystemUtsname returns the system utsname struct by calling unix.Uname.
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 main() {
	uts, err := GetSystemUtsname()
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error getting uname: %v\n", err)
		os.Exit(1)
	}
	fmt.Printf("System info retrieved successfully (Sysname non-empty: %t)\n", uts.Sysname[0] != 0)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.Uname in pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.0.0-20220406155245-289d7a0edf71"
  ],
  "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")
}