golang.org/x/sys v0.22.0: unix.S_IFLNK

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.S_IFLNK in pkg:golang/golang.org/x/sys@v0.22.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/sys@v0.22.0
Demonstrate these symbols/APIs:
  - golang.org/x/sys/unix.S_IFLNK

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:sha256:5396cf59e5ca9d42f986bfe62f8bb8dcf2f867297d4557ef9b45c7d400588cc7","contract":["unix.S_IFLNK matches the standard POSIX symbolic link type constant value","unix.S_IFLNK masked with unix.S_IFMT equals unix.S_IFLNK","unix.S_IFLNK is distinct from other file type constants"],"goal":"verify golang.org/x/sys/unix.S_IFLNK in pkg:golang/golang.org/x/sys@v0.22.0","kind":"HOW","packages":["pkg:golang/golang.org/x/sys@v0.22.0"],"schemaVersion":1,"symbols":["golang.org/x/sys/unix.S_IFLNK"]},"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@v0.22.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/sys@v0.22.0","symbols":["golang.org/x/sys/unix.S_IFLNK"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.22

require golang.org/x/sys v0.22.0

golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=

package main

import (
	"fmt"

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

func main() {
	fmt.Printf("unix.S_IFLNK: %#o\n", unix.S_IFLNK)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/sys/unix.S_IFLNK in pkg:golang/golang.org/x/sys@v0.22.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/sys@v0.22.0"
  ],
  "symbols": [
    "golang.org/x/sys/unix.S_IFLNK"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	// Assertion 1: unix.S_IFLNK matches the standard POSIX symbolic link type constant value
	{
		const expected uint32 = 0120000
		if unix.S_IFLNK != expected {
			fmt.Fprintf(os.Stderr, "assertion 1 failed: unix.S_IFLNK = %#o, want %#o\n", unix.S_IFLNK, expected)
			os.Exit(1)
		}
	}

	// Assertion 2: unix.S_IFLNK masked with unix.S_IFMT equals unix.S_IFLNK
	{
		masked := unix.S_IFLNK & unix.S_IFMT
		if masked != unix.S_IFLNK {
			fmt.Fprintf(os.Stderr, "assertion 2 failed: unix.S_IFLNK & unix.S_IFMT = %#o, want %#o\n", masked, unix.S_IFLNK)
			os.Exit(1)
		}
	}

	// Assertion 3: unix.S_IFLNK is distinct from other file type constants
	{
		if unix.S_IFLNK == unix.S_IFREG || unix.S_IFLNK == unix.S_IFDIR {
			fmt.Fprintf(os.Stderr, "assertion 3 failed: unix.S_IFLNK should differ from S_IFREG (%#o) and S_IFDIR (%#o)\n", unix.S_IFREG, unix.S_IFDIR)
			os.Exit(1)
		}
	}

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