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denoland-deno/runtime/ops/process.rs
Aaron O'Mullan 2aed322dd5
refactor: convert ops to use serde_v8 (#10009)
This commit rewrites most of the ops to use "serde_v8" instead
of "json" serialization.
2021-04-05 18:40:24 +02:00

299 lines
7.3 KiB
Rust

// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use super::io::ChildStderrResource;
use super::io::ChildStdinResource;
use super::io::ChildStdoutResource;
use super::io::StdFileResource;
use crate::permissions::Permissions;
use deno_core::error::bad_resource_id;
use deno_core::error::type_error;
use deno_core::error::AnyError;
use deno_core::AsyncMutFuture;
use deno_core::AsyncRefCell;
use deno_core::OpState;
use deno_core::RcRef;
use deno_core::Resource;
use deno_core::ResourceId;
use deno_core::ZeroCopyBuf;
use serde::Deserialize;
use serde::Serialize;
use std::borrow::Cow;
use std::cell::RefCell;
use std::rc::Rc;
use tokio::process::Command;
#[cfg(unix)]
use std::os::unix::process::ExitStatusExt;
pub fn init(rt: &mut deno_core::JsRuntime) {
super::reg_json_sync(rt, "op_run", op_run);
super::reg_json_async(rt, "op_run_status", op_run_status);
super::reg_json_sync(rt, "op_kill", op_kill);
}
fn clone_file(
state: &mut OpState,
rid: ResourceId,
) -> Result<std::fs::File, AnyError> {
StdFileResource::with(state, rid, move |r| match r {
Ok(std_file) => std_file.try_clone().map_err(AnyError::from),
Err(_) => Err(bad_resource_id()),
})
}
fn subprocess_stdio_map(s: &str) -> Result<std::process::Stdio, AnyError> {
match s {
"inherit" => Ok(std::process::Stdio::inherit()),
"piped" => Ok(std::process::Stdio::piped()),
"null" => Ok(std::process::Stdio::null()),
_ => Err(type_error("Invalid resource for stdio")),
}
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct RunArgs {
cmd: Vec<String>,
cwd: Option<String>,
env: Vec<(String, String)>,
stdin: String,
stdout: String,
stderr: String,
stdin_rid: ResourceId,
stdout_rid: ResourceId,
stderr_rid: ResourceId,
}
struct ChildResource {
child: AsyncRefCell<tokio::process::Child>,
}
impl Resource for ChildResource {
fn name(&self) -> Cow<str> {
"child".into()
}
}
impl ChildResource {
fn borrow_mut(self: Rc<Self>) -> AsyncMutFuture<tokio::process::Child> {
RcRef::map(self, |r| &r.child).borrow_mut()
}
}
#[derive(Serialize)]
#[serde(rename_all = "camelCase")]
// TODO(@AaronO): maybe find a more descriptive name or a convention for return structs
struct RunInfo {
rid: ResourceId,
pid: Option<u32>,
stdin_rid: Option<ResourceId>,
stdout_rid: Option<ResourceId>,
stderr_rid: Option<ResourceId>,
}
fn op_run(
state: &mut OpState,
run_args: RunArgs,
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<RunInfo, AnyError> {
state.borrow::<Permissions>().run.check()?;
let args = run_args.cmd;
let env = run_args.env;
let cwd = run_args.cwd;
let mut c = Command::new(args.get(0).unwrap());
(1..args.len()).for_each(|i| {
let arg = args.get(i).unwrap();
c.arg(arg);
});
cwd.map(|d| c.current_dir(d));
for (key, value) in &env {
c.env(key, value);
}
// TODO: make this work with other resources, eg. sockets
if !run_args.stdin.is_empty() {
c.stdin(subprocess_stdio_map(run_args.stdin.as_ref())?);
} else {
let file = clone_file(state, run_args.stdin_rid)?;
c.stdin(file);
}
if !run_args.stdout.is_empty() {
c.stdout(subprocess_stdio_map(run_args.stdout.as_ref())?);
} else {
let file = clone_file(state, run_args.stdout_rid)?;
c.stdout(file);
}
if !run_args.stderr.is_empty() {
c.stderr(subprocess_stdio_map(run_args.stderr.as_ref())?);
} else {
let file = clone_file(state, run_args.stderr_rid)?;
c.stderr(file);
}
// We want to kill child when it's closed
c.kill_on_drop(true);
// Spawn the command.
let mut child = c.spawn()?;
let pid = child.id();
let stdin_rid = match child.stdin.take() {
Some(child_stdin) => {
let rid = state
.resource_table
.add(ChildStdinResource::from(child_stdin));
Some(rid)
}
None => None,
};
let stdout_rid = match child.stdout.take() {
Some(child_stdout) => {
let rid = state
.resource_table
.add(ChildStdoutResource::from(child_stdout));
Some(rid)
}
None => None,
};
let stderr_rid = match child.stderr.take() {
Some(child_stderr) => {
let rid = state
.resource_table
.add(ChildStderrResource::from(child_stderr));
Some(rid)
}
None => None,
};
let child_resource = ChildResource {
child: AsyncRefCell::new(child),
};
let child_rid = state.resource_table.add(child_resource);
Ok(RunInfo {
rid: child_rid,
pid,
stdin_rid,
stdout_rid,
stderr_rid,
})
}
#[derive(Serialize)]
#[serde(rename_all = "camelCase")]
struct RunStatus {
got_signal: bool,
exit_code: i32,
exit_signal: i32,
}
async fn op_run_status(
state: Rc<RefCell<OpState>>,
rid: ResourceId,
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<RunStatus, AnyError> {
{
let s = state.borrow();
s.borrow::<Permissions>().run.check()?;
}
let resource = state
.borrow_mut()
.resource_table
.get::<ChildResource>(rid)
.ok_or_else(bad_resource_id)?;
let mut child = resource.borrow_mut().await;
let run_status = child.wait().await?;
let code = run_status.code();
#[cfg(unix)]
let signal = run_status.signal();
#[cfg(not(unix))]
let signal = None;
code
.or(signal)
.expect("Should have either an exit code or a signal.");
let got_signal = signal.is_some();
Ok(RunStatus {
got_signal,
exit_code: code.unwrap_or(-1),
exit_signal: signal.unwrap_or(-1),
})
}
#[cfg(unix)]
pub fn kill(pid: i32, signo: i32) -> Result<(), AnyError> {
use nix::sys::signal::{kill as unix_kill, Signal};
use nix::unistd::Pid;
use std::convert::TryFrom;
let sig = Signal::try_from(signo)?;
unix_kill(Pid::from_raw(pid), Option::Some(sig)).map_err(AnyError::from)
}
#[cfg(not(unix))]
pub fn kill(pid: i32, signal: i32) -> Result<(), AnyError> {
use std::io::Error;
use std::io::ErrorKind::NotFound;
use winapi::shared::minwindef::DWORD;
use winapi::shared::minwindef::FALSE;
use winapi::shared::minwindef::TRUE;
use winapi::shared::winerror::ERROR_INVALID_PARAMETER;
use winapi::um::errhandlingapi::GetLastError;
use winapi::um::handleapi::CloseHandle;
use winapi::um::processthreadsapi::OpenProcess;
use winapi::um::processthreadsapi::TerminateProcess;
use winapi::um::winnt::PROCESS_TERMINATE;
const SIGINT: i32 = 2;
const SIGKILL: i32 = 9;
const SIGTERM: i32 = 15;
if !matches!(signal, SIGINT | SIGKILL | SIGTERM) {
Err(type_error("unsupported signal"))
} else if pid <= 0 {
Err(type_error("unsupported pid"))
} else {
let handle = unsafe { OpenProcess(PROCESS_TERMINATE, FALSE, pid as DWORD) };
if handle.is_null() {
let err = match unsafe { GetLastError() } {
ERROR_INVALID_PARAMETER => Error::from(NotFound), // Invalid `pid`.
errno => Error::from_raw_os_error(errno as i32),
};
Err(err.into())
} else {
let r = unsafe { TerminateProcess(handle, 1) };
unsafe { CloseHandle(handle) };
match r {
FALSE => Err(Error::last_os_error().into()),
TRUE => Ok(()),
_ => unreachable!(),
}
}
}
}
#[derive(Deserialize)]
struct KillArgs {
pid: i32,
signo: i32,
}
fn op_kill(
state: &mut OpState,
args: KillArgs,
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<(), AnyError> {
super::check_unstable(state, "Deno.kill");
state.borrow::<Permissions>().run.check()?;
kill(args.pid, args.signo)?;
Ok(())
}