| // Copyright 2019 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| //! Run a test binary as a new process under the root job. |
| //! |
| //! This is needed since most or all jobs besides the root job have restricted job policy that |
| //! disallows use of the zx_process_create syscall, which process_builder uses. Processes that use |
| //! process_builder normally run in the root job, so we need a similar environment for the test. |
| //! |
| //! This approach is a temporary hack. It relies on the fact that the root job is available on |
| //! certain builds and to v1 test components through the fuchsia.kernel.RootJob service. |
| //! |
| //! TODO(fxbug.dev/71135): Figure out a better way to run these tests. |
| |
| use { |
| anyhow::{format_err, Context as _, Error}, |
| fidl_fuchsia_kernel as fkernel, |
| fuchsia_async as fasync, |
| fuchsia_zircon::{self as zx, }, |
| std::env, |
| std::ffi::{CStr, CString}, |
| std::fs, |
| std::path::{Path}, |
| }; |
| |
| #[fasync::run_singlethreaded] |
| async fn main() -> Result<(), Error> { |
| let args: Vec<String> = env::args().collect(); |
| if args.len() < 2 { |
| return Err(format_err!("Usage: root_job_test_runner <test binary> [extra args]")); |
| } |
| |
| let path = &args[1]; |
| if !Path::new(path).exists() { |
| return Err(format_err!("Test binary '{}' does not exist in namespace", path)); |
| } |
| |
| // We clone stdout and stderr, but leave stdin as null. This is to test that "cloning" |
| // a null stdio works when spawning processes (see bug 35902). |
| let stdout = std::io::stdout(); |
| let stderr = std::io::stderr(); |
| let mut actions = vec![ |
| fdio::SpawnAction::clone_fd(&stdout, 1), |
| fdio::SpawnAction::clone_fd(&stderr, 2), |
| ]; |
| |
| // Also pass through /tmp if it exists, as it's needed for some component manager tests |
| let tmp_str = CString::new("/tmp")?; |
| if Path::new("/tmp").exists() { |
| let tmp_dir = fs::File::open("/tmp")?; |
| actions.push(fdio::SpawnAction::add_namespace_entry(&tmp_str, fdio::transfer_fd(tmp_dir)?)); |
| } |
| |
| let root_job = get_root_job().await?; |
| let argv: Vec<CString> = |
| args.into_iter().skip(1).map(CString::new).collect::<Result<_, _>>()?; |
| let argv_ref: Vec<&CStr> = argv.iter().map(|a| &**a).collect(); |
| let options = fdio::SpawnOptions::CLONE_ALL |
| & !fdio::SpawnOptions::CLONE_STDIO; |
| let process = |
| fdio::spawn_etc(&root_job, options, argv_ref[0], argv_ref.as_slice(), None, &mut actions) |
| .map_err(|(status, errmsg)| { |
| format_err!("fdio::spawn_etc failed: {}, {}", status, errmsg) |
| })?; |
| |
| // Wait for the process to terminate. We're hosting it's /svc directory, which will go away if |
| // we exit before it. |
| fasync::OnSignals::new(&process, zx::Signals::PROCESS_TERMINATED).await?; |
| |
| // Return the same code as the test process, in case it failed. |
| let info = process.info()?; |
| zx::Process::exit(info.return_code); |
| } |
| |
| async fn get_root_job() -> Result<zx::Job, Error> { |
| let (proxy, server_end) = fidl::endpoints::create_proxy::<fkernel::RootJobMarker>()?; |
| fdio::service_connect("/svc/fuchsia.kernel.RootJob", server_end.into_channel()) |
| .context("Failed to connect to fuchsia.kernel.RootJob service")?; |
| |
| let job = proxy.get().await?; |
| Ok(job) |
| } |