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https://github.com/neondatabase/neon.git
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a22be5af72
Migrates the remaining crates to edition 2024. We like to stay on the latest edition if possible. There is no functional changes, however some code changes had to be done to accommodate the edition's breaking changes. Like the previous migration PRs, this is comprised of three commits: * the first does the edition update and makes `cargo check`/`cargo clippy` pass. we had to update bindgen to make its output [satisfy the requirements of edition 2024](https://doc.rust-lang.org/edition-guide/rust-2024/unsafe-extern.html) * the second commit does a `cargo fmt` for the new style edition. * the third commit reorders imports as a one-off change. As before, it is entirely optional. Part of #10918
40 lines
1.2 KiB
Rust
40 lines
1.2 KiB
Rust
//! Linux-specific socket ioctls.
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//!
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//! <https://elixir.bootlin.com/linux/v6.1.128/source/include/uapi/linux/sockios.h#L25-L27>
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use std::io;
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use std::mem::MaybeUninit;
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use std::os::fd::RawFd;
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use std::os::raw::c_int;
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use nix::libc::{FIONREAD, TIOCOUTQ};
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unsafe fn do_ioctl(socket_fd: RawFd, cmd: nix::libc::Ioctl) -> io::Result<c_int> {
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let mut inq: MaybeUninit<c_int> = MaybeUninit::uninit();
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// SAFETY: encapsulating fn is unsafe, we require `socket_fd` to be a valid file descriptor
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unsafe {
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let err = nix::libc::ioctl(socket_fd, cmd, inq.as_mut_ptr());
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if err == 0 {
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Ok(inq.assume_init())
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} else {
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Err(io::Error::last_os_error())
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}
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}
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}
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/// # Safety
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///
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/// Caller must ensure that `socket_fd` is a valid TCP socket file descriptor.
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pub unsafe fn inq(socket_fd: RawFd) -> io::Result<c_int> {
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// SAFETY: encapsulating fn is unsafe
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unsafe { do_ioctl(socket_fd, FIONREAD) }
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}
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/// # Safety
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///
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/// Caller must ensure that `socket_fd` is a valid TCP socket file descriptor.
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pub unsafe fn outq(socket_fd: RawFd) -> io::Result<c_int> {
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// SAFETY: encapsulating fn is unsafe
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unsafe { do_ioctl(socket_fd, TIOCOUTQ) }
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}
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