golang.org/x/sys v0.45.0: unix.ByteSliceToString, unix.NsecToTimespec, unix.TimespecToNsec

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 pkg:golang/golang.org/x/sys@v0.45.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.45.0

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:ec78495b99da6a86df5dfaeb496407985318cb9487e36db030c984290c88fd41","contract":["unix.ByteSliceToString converts null-terminated byte slice to string","unix.NsecToTimespec converts nanoseconds to Timespec structure","unix.TimespecToNsec converts Timespec structure back to nanoseconds","unix.Getpagesize returns positive system memory page size"],"goal":"verify pkg:golang/golang.org/x/sys@v0.45.0","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.45.0"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.ByteSliceToString","golang.org/x/sys/unix.NsecToTimespec","golang.org/x/sys/unix.TimespecToNsec","golang.org/x/sys/unix.Getpagesize"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","ecosystem":"golang","os":"linux","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/golang.org/x/sys@v0.45.0"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.ByteSliceToString","golang.org/x/sys/unix.NsecToTimespec","golang.org/x/sys/unix.TimespecToNsec","golang.org/x/sys/unix.Getpagesize"],"verifierAdapter":"golang@1"}

module sample

go 1.25.0

require golang.org/x/sys v0.45.0

golang.org/x/sys v0.45.0 h1:dO4czNzziLiiXplLQgBCEpCvXQ3dnkn0SdaZSYdQ+FY=
golang.org/x/sys v0.45.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=

package main

import (
	"fmt"
	"golang.org/x/sys/unix"
)

func main() {
	buf := []byte{'C', 'o', 'd', 'e', 'S', 'a', 'm', 'p', 'l', 'e', 'X', 0, 'e', 'x', 't', 'r', 'a'}
	str := unix.ByteSliceToString(buf)
	fmt.Println("Converted string:", str)

	ts := unix.NsecToTimespec(1_000_000_000)
	fmt.Printf("Timespec: sec=%d, nsec=%d\n", ts.Sec, ts.Nsec)

	fmt.Printf("Page size: %d\n", unix.Getpagesize())
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/golang.org/x/sys@v0.45.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.45.0"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	// Assertion 1: ByteSliceToString converts null-terminated byte slice to Go string
	buf := []byte{'C', 'o', 'd', 'e', 'S', 'a', 'm', 'p', 'l', 'e', 'X', 0, 'e', 'x', 't', 'r', 'a'}
	gotStr := unix.ByteSliceToString(buf)
	expectedStr := "CodeSampleX"
	if gotStr != expectedStr {
		fmt.Fprintf(os.Stderr, "Assertion failed: ByteSliceToString got %q, want %q\n", gotStr, expectedStr)
		os.Exit(1)
	}

	// Assertion 2: NsecToTimespec converts nanoseconds to Timespec structure
	nsec := int64(1_500_000_000)
	ts := unix.NsecToTimespec(nsec)
	if ts.Sec != 1 || ts.Nsec != 500_000_000 {
		fmt.Fprintf(os.Stderr, "Assertion failed: NsecToTimespec got sec=%d, nsec=%d, want sec=1, nsec=500000000\n", ts.Sec, ts.Nsec)
		os.Exit(1)
	}

	// Assertion 3: TimespecToNsec converts Timespec structure back to nanoseconds
	recoveredNsec := unix.TimespecToNsec(ts)
	if recoveredNsec != nsec {
		fmt.Fprintf(os.Stderr, "Assertion failed: TimespecToNsec got %d, want %d\n", recoveredNsec, nsec)
		os.Exit(1)
	}

	// Assertion 4: Getpagesize returns positive system memory page size
	pageSize := unix.Getpagesize()
	if pageSize <= 0 {
		fmt.Fprintf(os.Stderr, "Assertion failed: Getpagesize returned non-positive value %d\n", pageSize)
		os.Exit(1)
	}

	fmt.Println("All contract assertions passed successfully.")
}