libc 0.2.190: getpid

# 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"
version = "0.1.0"
dependencies = [
 "libc",
]

[package]
name = "sample"
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 getpid 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:
  - getpid

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:ca5027d4055b1fb0b1713ec139d02701c41bc564758880deb53d131a891f09e2","contract":["unsafe { libc::getpid() } returns a positive libc::pid_t for the calling process","repeated calls to unsafe { libc::getpid() } in the same process return an identical libc::pid_t"],"goal":"verify getpid in pkg:cargo/libc@0.2.190","kind":"HOW","packages":["pkg:cargo/libc@0.2.190"],"schemaVersion":1,"symbols":["getpid"]},"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":["getpid"],"verifierAdapter":"cargo@1"}

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

use libc::{getpid, pid_t};

fn current_process_id() -> pid_t {
    unsafe { getpid() }
}

fn main() {
    let pid: pid_t = current_process_id();
    assert!(pid > 0, "getpid must return a positive pid_t");

    let second_pid: pid_t = current_process_id();
    assert_eq!(pid, second_pid, "getpid must return the same pid_t across calls in the same process");
}