golang.org/x/sys v0.2.0: unix.TimeToTimespec

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.TimeToTimespec in pkg:golang/golang.org/x/sys@v0.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.2.0
Demonstrate these symbols/APIs:
  - golang.org/x/sys/unix.TimeToTimespec

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:sha256:7eea6cb889082b96081f45f8fbe9159940e02187974cba3e20e003993bbadd5f","contract":["unix.TimeToTimespec(time.Unix(1700000000, 123456789).UTC()) returns Timespec{Sec: 1700000000, Nsec: 123456789} with nil error","unix.TimeToTimespec(time.Unix(0, 0).UTC()) returns Timespec{Sec: 0, Nsec: 0} with nil error"],"goal":"verify golang.org/x/sys/unix.TimeToTimespec in pkg:golang/golang.org/x/sys@v0.2.0","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.2.0"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.TimeToTimespec"]},"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@v0.2.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/sys@v0.2.0","symbols":["golang.org/x/sys/unix.TimeToTimespec"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.20

require golang.org/x/sys v0.2.0

golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.TimeToTimespec in pkg:golang/golang.org/x/sys@v0.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.2.0"
  ],
  "symbols": [
    "golang.org/x/sys/unix.TimeToTimespec"
  ]
}

package main

import (
	"fmt"
	"os"
	"time"

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

func main() {
	in := time.Unix(1700000000, 123456789).UTC()
	ts, err := unix.TimeToTimespec(in)
	if err != nil {
		fmt.Fprintf(os.Stderr, "unexpected error from TimeToTimespec: %v\n", err)
		os.Exit(1)
	}
	if ts.Sec != 1700000000 || ts.Nsec != 123456789 {
		fmt.Fprintf(os.Stderr, "unexpected Timespec: got Sec=%d Nsec=%d\n", ts.Sec, ts.Nsec)
		os.Exit(1)
	}

	epoch := time.Unix(0, 0).UTC()
	tsZero, err := unix.TimeToTimespec(epoch)
	if err != nil {
		fmt.Fprintf(os.Stderr, "unexpected error for epoch: %v\n", err)
		os.Exit(1)
	}
	if tsZero.Sec != 0 || tsZero.Nsec != 0 {
		fmt.Fprintf(os.Stderr, "unexpected epoch Timespec: got Sec=%d Nsec=%d\n", tsZero.Sec, tsZero.Nsec)
		os.Exit(1)
	}
}