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use std::io;
use std::os::unix::net::UnixStream;
use std::os::unix::prelude::*;
#[derive(Clone, Debug, Eq, Hash, PartialEq)]
#[repr(C)]
pub struct Ucred {
#[cfg(any(target_os = "linux", target_os = "netbsd"))]
pub pid: libc::pid_t,
pub uid: libc::uid_t,
pub gid: libc::gid_t,
#[cfg(target_os = "openbsd")]
pub pid: libc::pid_t,
}
#[cfg(target_os = "netbsd")]
const SO_PEERCRED: libc::c_int = crate::constants::LOCAL_PEEREID;
#[cfg(not(target_os = "netbsd"))]
const SO_PEERCRED: libc::c_int = libc::SO_PEERCRED;
pub(crate) unsafe fn get_ucred_raw(sockfd: RawFd) -> io::Result<Ucred> {
let mut ucred = Ucred {
pid: 0,
uid: 0,
gid: 0,
};
let len = crate::util::getsockopt_raw(
sockfd,
libc::SOL_SOCKET,
SO_PEERCRED,
std::slice::from_mut(&mut ucred),
)?;
if len != std::mem::size_of::<Ucred>() {
return Err(io::Error::from_raw_os_error(libc::EINVAL));
}
Ok(ucred)
}
#[inline]
pub fn get_ucred(sock: &UnixStream) -> io::Result<Ucred> {
unsafe { get_ucred_raw(sock.as_raw_fd()) }
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_get_ucred() {
let uid = unsafe { libc::getuid() };
let gid = unsafe { libc::getgid() };
let pid = unsafe { libc::getpid() };
let (a, b) = UnixStream::pair().unwrap();
let acred = get_ucred(&a).unwrap();
assert_eq!(acred.uid, uid);
assert_eq!(acred.gid, gid);
assert_eq!(acred.pid, pid);
let bcred = get_ucred(&b).unwrap();
assert_eq!(bcred.uid, uid);
assert_eq!(bcred.gid, gid);
assert_eq!(bcred.pid, pid);
}
}