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

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.Timespec 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.Timespec

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:sha256:825b7c9570372b4ec09dcaa3a7c84ab0375ca280491b857bdbb913e1b7d5b8d0","contract":["unix.Timespec stores seconds and nanoseconds in Sec and Nsec fields","unix.Timespec.Nano returns total elapsed nanoseconds as int64","unix.Timespec.Unix returns second and nanosecond components as int64 values","unix.NsecToTimespec and unix.TimeToTimespec construct a unix.Timespec with matching Sec and Nsec"],"goal":"verify golang.org/x/sys/unix.Timespec 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.Timespec"]},"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.Timespec"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.21

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=

package main

import (
	"fmt"
	"time"

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

func NewTimespec(sec, nsec int64) unix.Timespec {
	return unix.Timespec{
		Sec:  sec,
		Nsec: nsec,
	}
}

func main() {
	ts := NewTimespec(3, 500000000)
	fmt.Printf("Timespec: Sec=%d Nsec=%d Nano=%d\n", ts.Sec, ts.Nsec, ts.Nano())

	sec, nsec := ts.Unix()
	fmt.Printf("Unix: sec=%d nsec=%d\n", sec, nsec)

	converted, err := unix.TimeToTimespec(time.Unix(1700000000, 123456789))
	if err != nil {
		panic(err)
	}
	fmt.Printf("Converted: Sec=%d Nsec=%d\n", converted.Sec, converted.Nsec)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.Timespec 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.Timespec"
  ]
}

package main

import (
	"fmt"
	"os"
	"time"

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

func main() {
	ts := unix.Timespec{
		Sec:  12,
		Nsec: 345000000,
	}
	if ts.Sec != 12 || ts.Nsec != 345000000 {
		fmt.Fprintf(os.Stderr, "unexpected Sec/Nsec: got (%d, %d)\n", ts.Sec, ts.Nsec)
		os.Exit(1)
	}

	expectedNano := int64(12*1e9 + 345000000)
	if got := ts.Nano(); got != expectedNano {
		fmt.Fprintf(os.Stderr, "unexpected Nano(): got %d, want %d\n", got, expectedNano)
		os.Exit(1)
	}

	sec, nsec := ts.Unix()
	if sec != 12 || nsec != 345000000 {
		fmt.Fprintf(os.Stderr, "unexpected Unix(): got (%d, %d)\n", sec, nsec)
		os.Exit(1)
	}

	fromNano := unix.NsecToTimespec(expectedNano)
	if fromNano.Sec != 12 || fromNano.Nsec != 345000000 {
		fmt.Fprintf(os.Stderr, "unexpected NsecToTimespec(): got (%d, %d)\n", fromNano.Sec, fromNano.Nsec)
		os.Exit(1)
	}

	fromTime, err := unix.TimeToTimespec(time.Unix(1700000000, 750000000))
	if err != nil {
		fmt.Fprintf(os.Stderr, "TimeToTimespec failed: %v\n", err)
		os.Exit(1)
	}
	if fromTime.Sec != 1700000000 || fromTime.Nsec != 750000000 {
		fmt.Fprintf(os.Stderr, "unexpected TimeToTimespec(): got (%d, %d)\n", fromTime.Sec, fromTime.Nsec)
		os.Exit(1)
	}

	fmt.Println("contract passed")
}