4 releases
0.2.2 | Jul 10, 2023 |
---|---|
0.2.1 | Aug 14, 2021 |
0.2.0 | Aug 14, 2021 |
0.1.0 | Aug 6, 2021 |
#422 in Unix APIs
10KB
62 lines
pidfd_getfd
This crate provides a direct binding to the pidfd_getfd
syscall along with
a slightly more convenient wrapper, get_file_from_pidfd
. This also contains
an extension trait for pidfd::PidFd
and std
's PidFd
(currently only
available on nightly rustc) which provides access to get_file_from_pidfd
via
PidFdExt::get_file()
.
Note that pidfd
s are currently only supported on Linux 5.6 or later, thus this crate
will only work on Linux. If any other platform gains support for pidfd
s, please
let me know through an issue or pull request!
Please note that this crate has not been thoroughly tested. Viewer discretion is advised.
Example
use pidfd_getfd::{get_file_from_pidfd, GetFdFlags};
use std::{
io::{self, Read},
os::unix::prelude::RawFd,
};
let pidfd: RawFd = /* ... */;
let target_fd: RawFd = /* ... */;
let mut file = get_file_from_pidfd(pidfd, target_fd, GetFdFlags::empty())?;
let mut buf = Vec::new();
file.read_to_end(&mut buf)?;
println!("{:#?}", buf);
Ok(())
Using pidfd
:
use pidfd::PidFd;
use pidfd_getfd::{GetFdFlags, PidFdExt};
use std::process::Command;
let child = Command::new("/usr/bin/foo").spawn().expect("failed to run `foo`");
let pidfd = PidFd::from_std_checked(&child)?;
let file_from_child = pidfd.get_file(1, GetFdFlags::empty())?;
Using nightly rustc:
#![feature(linux_pidfd)]
use pidfd_getfd::{GetFdFlags, PidFdExt};
use std::{
os::linux::process::{ChildExt, CommandExt},
process::Command,
};
let child = Command::new("/usr/bin/foo")
.create_pidfd(true)
.spawn()
.expect("failed to run `foo`");
let file_from_child = child.pidfd()?.get_file(1, GetFdFlags::empty())?;
Dependencies
~38KB