libc 0.2.190: libc::getppid

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 4

[[package]]
name = "libc"
version = "0.2.190"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ce5d3ddc6d3fa000eb1536d85e147bfe31aacaba692ed6a876f95cb7c855be78"

[[package]]
name = "sample-libc-getppid"
version = "0.1.0"
dependencies = [
 "libc",
]

[package]
name = "sample-libc-getppid"
version = "0.1.0"
edition = "2021"

[dependencies]
libc = "=0.2.190"

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 libc::getppid in pkg:cargo/libc@0.2.190
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:cargo/libc@0.2.190
Demonstrate these symbols/APIs:
  - libc::getppid

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:sha256:6f8c0fee7bebe99db3c74ce2ef1db43abe06aec01533409536205cdf4e455e95","contract":["unsafe { libc::getppid() } returns a non-negative libc::pid_t (0 when running as PID 1 in a container namespace) matching std::os::unix::process::parent_id()","in a spawned child process, unsafe { libc::getppid() } returns the spawning parent's std::process::id() as libc::pid_t"],"goal":"verify libc::getppid in pkg:cargo/libc@0.2.190","kind":"HOW","packages":["pkg:cargo/libc@0.2.190"],"schemaVersion":1,"symbols":["libc::getppid"]},"contractCommand":["cargo","run","--offline"],"environment":{"arch":"x64","ecosystem":"cargo","os":"linux","packageManager":"cargo","schemaVersion":1},"license":"MIT-0","packages":["pkg:cargo/libc@0.2.190"],"schemaVersion":1,"subject":"pkg:cargo/libc@0.2.190","symbols":["libc::getppid"],"verifierAdapter":"cargo@1"}

{
  "schemaVersion": 1,
  "goal": "verify libc::getppid in pkg:cargo/libc@0.2.190",
  "kind": "HOW",
  "packages": [
    "pkg:cargo/libc@0.2.190"
  ],
  "symbols": [
    "libc::getppid"
  ]
}

fn main() {
    let args: Vec<String> = std::env::args().collect();
    if args.get(1).map(String::as_str) == Some("--child") {
        let expected_ppid: libc::pid_t = args[2].parse().expect("valid parent pid");
        let child_ppid: libc::pid_t = unsafe { libc::getppid() };
        assert_eq!(child_ppid, expected_ppid);
        return;
    }

    let ppid: libc::pid_t = unsafe { libc::getppid() };
    assert!(ppid >= 0);
    assert_eq!(ppid as u32, std::os::unix::process::parent_id());

    let self_pid: u32 = std::process::id();
    let status = std::process::Command::new(std::env::current_exe().expect("current_exe"))
        .arg("--child")
        .arg(self_pid.to_string())
        .status()
        .expect("spawn child");
    assert!(status.success());
}