45 lines
1.7 KiB
Rust
45 lines
1.7 KiB
Rust
// Copyright (C) 2022 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Provides utilities for sockets.
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use std::ffi::CString;
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use std::os::unix::io::RawFd;
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use thiserror::Error;
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/// Errors this crate can generate
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#[derive(Error, Debug)]
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pub enum SocketError {
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/// invalid name parameter
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#[error("socket name {0} contains NUL byte")]
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NulError(String),
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/// android_get_control_socket failed to get a fd
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#[error("android_get_control_socket({0}) failed")]
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GetControlSocketFailed(String),
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}
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/// android_get_control_socket - simple helper function to get the file
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/// descriptor of our init-managed Unix domain socket. `name' is the name of the
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/// socket, as given in init.rc. Returns -1 on error.
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pub fn android_get_control_socket(name: &str) -> Result<RawFd, SocketError> {
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let cstr = CString::new(name).map_err(|_| SocketError::NulError(name.to_owned()))?;
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// SAFETY: android_get_control_socket doesn't take ownership of name
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let fd = unsafe { cutils_bindgen::android_get_control_socket(cstr.as_ptr()) };
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if fd < 0 {
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return Err(SocketError::GetControlSocketFailed(name.to_owned()));
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}
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Ok(fd)
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}
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