mirror of
https://chromium.googlesource.com/crosvm/crosvm
synced 2025-02-05 18:20:34 +00:00
4fea399df9
crosvm is switching the import style to use one import per line. While more verbose, this will greatly reduce the occurence of merge conflicts going forward. Note: This is using a nightly feature of rustfmt. So it's a one-off re-format only. We are considering adding a nightly toolchain to enable the feature permanently. BUG=b:239937122 TEST=CQ Change-Id: Id2dd4dbdc0adfc4f8f3dd1d09da1daafa2a39992 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3784345 Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Tested-by: Dennis Kempin <denniskempin@google.com> Commit-Queue: Dennis Kempin <denniskempin@google.com>
56 lines
1.7 KiB
Rust
56 lines
1.7 KiB
Rust
// Copyright 2020 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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/// Very crude interactive console to allow the test host to run shell commands
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/// in the guest and receive the output.
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use std::fs::File;
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use std::io;
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use std::io::prelude::*;
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use std::path::Path;
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use std::process::Command;
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use std::process::Stdio;
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use std::str;
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/// Device file to read from and write to.
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const CONSOLE_FILE: &str = "/dev/ttyS1";
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/// Magic line sent when we are ready to receive a command.
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/// \x05 is the ENQ (enquiry) character, which is rarely used and 'should'
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/// not appear in command output.
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const MAGIC_LINE: &str = "\x05Ready";
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/// When ready to receive a command, the `MAGIC_LINE` is written to `input`.
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/// The received command is executed via /bin/sh/ and it's stdout is written
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/// back to `output`, terminated by `MAGIC_LINE`.
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fn listen(input: Box<dyn io::Read>, mut output: Box<dyn io::Write>) -> io::Result<()> {
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let mut reader = io::BufReader::new(input);
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loop {
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writeln!(&mut output, "{}", MAGIC_LINE).unwrap();
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let mut command = String::new();
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reader.read_line(&mut command)?;
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if command.trim() == "exit" {
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break;
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}
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println!("-> {:?}", command);
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let result = Command::new("/bin/sh")
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.args(&["-c", &command])
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.stderr(Stdio::inherit())
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.output()
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.unwrap();
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output.write(&result.stdout)?;
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}
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Ok(())
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}
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fn main() {
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let path = Path::new(CONSOLE_FILE);
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listen(
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Box::new(File::open(path).unwrap()),
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Box::new(File::create(path).unwrap()),
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)
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.unwrap();
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}
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