mirror of
https://github.com/denoland/deno.git
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96 lines
2.9 KiB
Rust
96 lines
2.9 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use crate::permissions::PermissionsContainer;
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use deno_core::error::AnyError;
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use deno_core::op2;
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use deno_core::ModuleSpecifier;
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use deno_core::OpState;
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deno_core::extension!(
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deno_runtime,
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ops = [op_main_module, op_ppid],
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options = { main_module: ModuleSpecifier },
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state = |state, options| {
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state.put::<ModuleSpecifier>(options.main_module);
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},
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);
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#[op2]
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#[string]
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fn op_main_module(state: &mut OpState) -> Result<String, AnyError> {
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let main_url = state.borrow::<ModuleSpecifier>();
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let main_path = main_url.to_string();
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if main_url.scheme() == "file" {
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let main_path = main_url.to_file_path().unwrap();
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state
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.borrow_mut::<PermissionsContainer>()
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.check_read_blind(&main_path, "main_module", "Deno.mainModule")?;
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}
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Ok(main_path)
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}
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/// This is an op instead of being done at initialization time because
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/// it's expensive to retrieve the ppid on Windows.
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#[op2(fast)]
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#[bigint]
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pub fn op_ppid() -> i64 {
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#[cfg(windows)]
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{
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// Adopted from rustup:
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// https://github.com/rust-lang/rustup/blob/1.21.1/src/cli/self_update.rs#L1036
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// Copyright Diggory Blake, the Mozilla Corporation, and rustup contributors.
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// Licensed under either of
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// - Apache License, Version 2.0
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// - MIT license
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use std::mem;
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use winapi::shared::minwindef::DWORD;
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use winapi::um::handleapi::CloseHandle;
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use winapi::um::handleapi::INVALID_HANDLE_VALUE;
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use winapi::um::processthreadsapi::GetCurrentProcessId;
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use winapi::um::tlhelp32::CreateToolhelp32Snapshot;
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use winapi::um::tlhelp32::Process32First;
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use winapi::um::tlhelp32::Process32Next;
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use winapi::um::tlhelp32::PROCESSENTRY32;
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use winapi::um::tlhelp32::TH32CS_SNAPPROCESS;
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// SAFETY: winapi calls
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unsafe {
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// Take a snapshot of system processes, one of which is ours
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// and contains our parent's pid
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let snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
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if snapshot == INVALID_HANDLE_VALUE {
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return -1;
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}
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let mut entry: PROCESSENTRY32 = mem::zeroed();
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entry.dwSize = mem::size_of::<PROCESSENTRY32>() as DWORD;
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// Iterate over system processes looking for ours
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let success = Process32First(snapshot, &mut entry);
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if success == 0 {
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CloseHandle(snapshot);
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return -1;
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}
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let this_pid = GetCurrentProcessId();
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while entry.th32ProcessID != this_pid {
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let success = Process32Next(snapshot, &mut entry);
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if success == 0 {
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CloseHandle(snapshot);
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return -1;
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}
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}
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CloseHandle(snapshot);
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// FIXME: Using the process ID exposes a race condition
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// wherein the parent process already exited and the OS
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// reassigned its ID.
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let parent_id = entry.th32ParentProcessID;
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parent_id.into()
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}
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}
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#[cfg(not(windows))]
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{
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use std::os::unix::process::parent_id;
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parent_id().into()
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}
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}
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