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https://github.com/denoland/deno.git
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83 lines
2.1 KiB
Rust
83 lines
2.1 KiB
Rust
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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use deno_core::error::AnyError;
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use deno_core::op2;
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use deno_core::OpState;
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use deno_core::ResourceHandle;
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use deno_core::ResourceHandleFd;
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#[repr(u32)]
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enum HandleType {
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#[allow(dead_code)]
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Tcp = 0,
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Tty,
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#[allow(dead_code)]
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Udp,
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File,
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Pipe,
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Unknown,
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}
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#[op2(fast)]
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pub fn op_node_guess_handle_type(
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state: &mut OpState,
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rid: u32,
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) -> Result<u32, AnyError> {
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let handle = state.resource_table.get_handle(rid)?;
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let handle_type = match handle {
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ResourceHandle::Fd(handle) => guess_handle_type(handle),
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_ => HandleType::Unknown,
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};
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Ok(handle_type as u32)
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}
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#[cfg(windows)]
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fn guess_handle_type(handle: ResourceHandleFd) -> HandleType {
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use winapi::um::consoleapi::GetConsoleMode;
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use winapi::um::fileapi::GetFileType;
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use winapi::um::winbase::FILE_TYPE_CHAR;
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use winapi::um::winbase::FILE_TYPE_DISK;
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use winapi::um::winbase::FILE_TYPE_PIPE;
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// SAFETY: Call to win32 fileapi. `handle` is a valid fd.
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match unsafe { GetFileType(handle) } {
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FILE_TYPE_DISK => HandleType::File,
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FILE_TYPE_CHAR => {
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let mut mode = 0;
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// SAFETY: Call to win32 consoleapi. `handle` is a valid fd.
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// `mode` is a valid pointer.
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if unsafe { GetConsoleMode(handle, &mut mode) } == 1 {
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HandleType::Tty
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} else {
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HandleType::File
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}
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}
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FILE_TYPE_PIPE => HandleType::Pipe,
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_ => HandleType::Unknown,
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}
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}
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#[cfg(unix)]
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fn guess_handle_type(handle: ResourceHandleFd) -> HandleType {
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use std::io::IsTerminal;
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// SAFETY: The resource remains open for the duration of borrow_raw.
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if unsafe { std::os::fd::BorrowedFd::borrow_raw(handle).is_terminal() } {
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return HandleType::Tty;
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}
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// SAFETY: It is safe to zero-initialize a `libc::stat` struct.
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let mut s = unsafe { std::mem::zeroed() };
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// SAFETY: Call to libc
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if unsafe { libc::fstat(handle, &mut s) } == 1 {
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return HandleType::Unknown;
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}
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match s.st_mode & 61440 {
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libc::S_IFREG | libc::S_IFCHR => HandleType::File,
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libc::S_IFIFO => HandleType::Pipe,
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libc::S_IFSOCK => HandleType::Tcp,
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_ => HandleType::Unknown,
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}
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}
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