authfs/fd_server/src/common.rs

/*
 * Copyright (C) 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use std::fs::File;
use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};

// TODO: Remove if/when std::os::unix::io::OwnedFd is standardized.
pub struct OwnedFd {
    owner: File,
}

impl FromRawFd for OwnedFd {
    unsafe fn from_raw_fd(fd: RawFd) -> Self {
        OwnedFd { owner: File::from_raw_fd(fd) }
    }
}

impl AsRawFd for OwnedFd {
    fn as_raw_fd(&self) -> RawFd {
        self.owner.as_raw_fd()
    }
}