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initial-pr
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main
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.gitignore
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.gitignore
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# Created by https://www.toptal.com/developers/gitignore/api/visualstudiocode,rust
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# Edit at https://www.toptal.com/developers/gitignore?templates=visualstudiocode,rust
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### Rust ###
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# Generated by Cargo
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# will have compiled files and executables
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debug/
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target/
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# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
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# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
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Cargo.lock
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# These are backup files generated by rustfmt
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**/*.rs.bk
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# MSVC Windows builds of rustc generate these, which store debugging information
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*.pdb
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### VisualStudioCode ###
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.vscode/*
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!.vscode/settings.json
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!.vscode/tasks.json
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!.vscode/launch.json
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!.vscode/extensions.json
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!.vscode/*.code-snippets
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# Local History for Visual Studio Code
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.history/
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# Built Visual Studio Code Extensions
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*.vsix
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### VisualStudioCode Patch ###
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# Ignore all local history of files
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.history
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.ionide
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# Support for Project snippet scope
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# End of https://www.toptal.com/developers/gitignore/api/visualstudiocode,rust
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4
.vscode/settings.json
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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|
|
||||||
checksum = "2eb6ec270a31b1d3c7e266b999739109abce8b6c87e4b31fcfcd788b65267395"
|
|
||||||
dependencies = [
|
|
||||||
"cfg-if",
|
|
||||||
"js-sys",
|
|
||||||
"wasm-bindgen",
|
|
||||||
"web-sys",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "wasm-bindgen-macro"
|
|
||||||
version = "0.2.79"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "2f4203d69e40a52ee523b2529a773d5ffc1dc0071801c87b3d270b471b80ed01"
|
|
||||||
dependencies = [
|
|
||||||
"quote",
|
|
||||||
"wasm-bindgen-macro-support",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "wasm-bindgen-macro-support"
|
|
||||||
version = "0.2.79"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "bfa8a30d46208db204854cadbb5d4baf5fcf8071ba5bf48190c3e59937962ebc"
|
|
||||||
dependencies = [
|
|
||||||
"proc-macro2",
|
|
||||||
"quote",
|
|
||||||
"syn",
|
|
||||||
"wasm-bindgen-backend",
|
|
||||||
"wasm-bindgen-shared",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "wasm-bindgen-shared"
|
|
||||||
version = "0.2.79"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "3d958d035c4438e28c70e4321a2911302f10135ce78a9c7834c0cab4123d06a2"
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "web-sys"
|
|
||||||
version = "0.3.56"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "c060b319f29dd25724f09a2ba1418f142f539b2be99fbf4d2d5a8f7330afb8eb"
|
|
||||||
dependencies = [
|
|
||||||
"js-sys",
|
|
||||||
"wasm-bindgen",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "wepoll-ffi"
|
|
||||||
version = "0.1.2"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "d743fdedc5c64377b5fc2bc036b01c7fd642205a0d96356034ae3404d49eb7fb"
|
|
||||||
dependencies = [
|
|
||||||
"cc",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "winapi"
|
|
||||||
version = "0.3.9"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
|
||||||
dependencies = [
|
|
||||||
"winapi-i686-pc-windows-gnu",
|
|
||||||
"winapi-x86_64-pc-windows-gnu",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "winapi-i686-pc-windows-gnu"
|
|
||||||
version = "0.4.0"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "winapi-util"
|
|
||||||
version = "0.1.5"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
|
|
||||||
dependencies = [
|
|
||||||
"winapi",
|
|
||||||
]
|
|
||||||
|
|
||||||
[[package]]
|
|
||||||
name = "winapi-x86_64-pc-windows-gnu"
|
|
||||||
version = "0.4.0"
|
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
|
||||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
|
||||||
15
Cargo.toml
15
Cargo.toml
@ -1,15 +0,0 @@
|
|||||||
[package]
|
|
||||||
name = "forktop"
|
|
||||||
version = "0.1.0"
|
|
||||||
edition = "2021"
|
|
||||||
|
|
||||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
|
||||||
|
|
||||||
[dependencies]
|
|
||||||
log = "0.4"
|
|
||||||
env_logger = "0.9"
|
|
||||||
thiserror = "1"
|
|
||||||
async-std = "1"
|
|
||||||
futures = "0.3.17"
|
|
||||||
|
|
||||||
nix = "0.23.1"
|
|
||||||
12
src/error.rs
12
src/error.rs
@ -1,12 +0,0 @@
|
|||||||
use async_std::io;
|
|
||||||
|
|
||||||
use thiserror::Error;
|
|
||||||
|
|
||||||
#[derive(Error, Debug)]
|
|
||||||
pub enum Error {
|
|
||||||
#[error("{msg}: {src}")]
|
|
||||||
Nix { msg: &'static str, src: nix::Error },
|
|
||||||
|
|
||||||
#[error("io: {0}")]
|
|
||||||
Io(#[from] io::Error),
|
|
||||||
}
|
|
||||||
250
src/main.rs
250
src/main.rs
@ -1,250 +0,0 @@
|
|||||||
use log::{debug, error, info, warn};
|
|
||||||
|
|
||||||
mod error;
|
|
||||||
|
|
||||||
use error::Error;
|
|
||||||
|
|
||||||
use std::collections::HashMap;
|
|
||||||
use std::ffi::{CStr, CString};
|
|
||||||
use std::os::unix::io::{FromRawFd, RawFd};
|
|
||||||
use std::sync::Arc;
|
|
||||||
|
|
||||||
use async_std::fs::File;
|
|
||||||
use async_std::io::{self, ReadExt, WriteExt};
|
|
||||||
use async_std::sync::Mutex;
|
|
||||||
use async_std::task;
|
|
||||||
use futures::try_join;
|
|
||||||
|
|
||||||
use nix::sys::ptrace::{self, Event, Options};
|
|
||||||
use nix::sys::signal::Signal;
|
|
||||||
use nix::sys::wait::{wait, WaitStatus};
|
|
||||||
use nix::unistd::Pid;
|
|
||||||
use nix::unistd::{self, ForkResult};
|
|
||||||
|
|
||||||
struct Child {
|
|
||||||
pid: Pid,
|
|
||||||
|
|
||||||
stdin: File,
|
|
||||||
stdout: File,
|
|
||||||
stderr: File,
|
|
||||||
}
|
|
||||||
|
|
||||||
struct ProcessDescription {
|
|
||||||
state: ProcessState,
|
|
||||||
parent: Option<Pid>,
|
|
||||||
|
|
||||||
name: Option<String>,
|
|
||||||
}
|
|
||||||
|
|
||||||
enum ProcessState {
|
|
||||||
Traced,
|
|
||||||
Completed(u8),
|
|
||||||
}
|
|
||||||
|
|
||||||
fn main() -> Result<(), Error> {
|
|
||||||
let env = env_logger::Env::new().filter_or("LOG", "info");
|
|
||||||
env_logger::init_from_env(env);
|
|
||||||
|
|
||||||
info!("forking child process...");
|
|
||||||
|
|
||||||
let child = spawn_child()?;
|
|
||||||
task::block_on(async_main(child))
|
|
||||||
}
|
|
||||||
|
|
||||||
fn spawn_child() -> Result<Child, Error> {
|
|
||||||
let child_stdin = unistd::pipe().map_err(|e| Error::Nix {
|
|
||||||
msg: "pipe",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
let child_stdout = unistd::pipe().map_err(|e| Error::Nix {
|
|
||||||
msg: "pipe",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
let child_stderr = unistd::pipe().map_err(|e| Error::Nix {
|
|
||||||
msg: "pipe",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
let pid = unsafe {
|
|
||||||
match nix::unistd::fork().map_err(|e| Error::Nix {
|
|
||||||
msg: "fork",
|
|
||||||
src: e,
|
|
||||||
})? {
|
|
||||||
ForkResult::Parent { child } => child,
|
|
||||||
ForkResult::Child => {
|
|
||||||
let err = run_child(
|
|
||||||
vec!["/bin/sh", "-c", "/bin/true"],
|
|
||||||
child_stdin.0,
|
|
||||||
child_stdout.1,
|
|
||||||
child_stderr.1,
|
|
||||||
);
|
|
||||||
error!("error spawning child: {}", err);
|
|
||||||
std::process::exit(1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
};
|
|
||||||
|
|
||||||
Ok(Child {
|
|
||||||
pid,
|
|
||||||
stdin: unsafe { File::from_raw_fd(child_stdin.1) },
|
|
||||||
stdout: unsafe { File::from_raw_fd(child_stdout.0) },
|
|
||||||
stderr: unsafe { File::from_raw_fd(child_stderr.0) },
|
|
||||||
})
|
|
||||||
}
|
|
||||||
|
|
||||||
fn run_child(args: Vec<&str>, stdin: RawFd, stdout: RawFd, stderr: RawFd) -> Error {
|
|
||||||
enum Never {}
|
|
||||||
|
|
||||||
fn int(args: Vec<&str>, stdin: RawFd, stdout: RawFd, stderr: RawFd) -> Result<Never, Error> {
|
|
||||||
// swap 3 main fds
|
|
||||||
unistd::dup2(stdin, 0).map_err(|e| Error::Nix {
|
|
||||||
msg: "dup2",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
unistd::dup2(stdout, 1).map_err(|e| Error::Nix {
|
|
||||||
msg: "dup2",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
unistd::dup2(stderr, 2).map_err(|e| Error::Nix {
|
|
||||||
msg: "dup2",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
// ask to be traced (stops process)
|
|
||||||
ptrace::traceme().map_err(|e| Error::Nix {
|
|
||||||
msg: "PTRACE_TRACEME",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
unistd::execve::<_, &CStr>(
|
|
||||||
&CString::new(args[0]).unwrap(),
|
|
||||||
args.into_iter()
|
|
||||||
.map(CString::new)
|
|
||||||
.map(Result::unwrap)
|
|
||||||
.collect::<Vec<_>>()
|
|
||||||
.as_slice(),
|
|
||||||
&[],
|
|
||||||
)
|
|
||||||
.map_err(|e| Error::Nix {
|
|
||||||
msg: "execve",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
unreachable!("execve doesn't return on success")
|
|
||||||
}
|
|
||||||
|
|
||||||
match int(args, stdin, stdout, stderr) {
|
|
||||||
Ok(s) => match s {},
|
|
||||||
Err(e) => e,
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
async fn async_main(child: Child) -> Result<(), Error> {
|
|
||||||
let child_stdin = child.stdin;
|
|
||||||
let child_stdout = child.stdout;
|
|
||||||
let child_stderr = child.stderr;
|
|
||||||
let child = child.pid;
|
|
||||||
|
|
||||||
let children = Arc::new(Mutex::new({
|
|
||||||
let mut m = HashMap::new();
|
|
||||||
m.insert(
|
|
||||||
child,
|
|
||||||
ProcessDescription {
|
|
||||||
state: ProcessState::Traced,
|
|
||||||
parent: None,
|
|
||||||
name: Some("main".to_string()),
|
|
||||||
},
|
|
||||||
);
|
|
||||||
m
|
|
||||||
}));
|
|
||||||
|
|
||||||
let wait_loop = task::spawn(wait_loop(children.clone()));
|
|
||||||
|
|
||||||
ptrace::setoptions(
|
|
||||||
child,
|
|
||||||
Options::PTRACE_O_TRACECLONE
|
|
||||||
| Options::PTRACE_O_TRACEFORK
|
|
||||||
| Options::PTRACE_O_TRACEEXIT
|
|
||||||
| Options::PTRACE_O_TRACEVFORK,
|
|
||||||
)
|
|
||||||
.map_err(|e| Error::Nix {
|
|
||||||
msg: "PTRACE_SETOPTIONS",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
ptrace::cont(child, None).map_err(|e| Error::Nix {
|
|
||||||
msg: "PTRACE_CONT",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
try_join!(wait_loop, task::spawn(handle_input(child_stdin)))?;
|
|
||||||
Ok(())
|
|
||||||
}
|
|
||||||
|
|
||||||
async fn handle_input(mut stdin_pipe: File) -> Result<(), Error> {
|
|
||||||
let mut stdin = io::stdin();
|
|
||||||
|
|
||||||
let mut bytes_in = vec![0 as u8; 128];
|
|
||||||
let mut bytes_out = vec![0 as u8; 128];
|
|
||||||
loop {
|
|
||||||
let num_read = stdin.read(&mut bytes_in).await?;
|
|
||||||
|
|
||||||
for i in 0..num_read {
|
|
||||||
debug!("forwarded byte: {}", i);
|
|
||||||
bytes_out[i] = bytes_in[i];
|
|
||||||
}
|
|
||||||
|
|
||||||
stdin_pipe.write_all(&bytes_out[0..num_read]).await?;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
async fn wait_loop(children: Arc<Mutex<HashMap<Pid, ProcessDescription>>>) -> Result<(), Error> {
|
|
||||||
while !children.lock().await.is_empty() {
|
|
||||||
let wait_result = wait().map_err(|e| Error::Nix {
|
|
||||||
msg: "wait",
|
|
||||||
src: e,
|
|
||||||
})?;
|
|
||||||
|
|
||||||
match &wait_result {
|
|
||||||
WaitStatus::PtraceEvent(pid, _, event) => match match_event(*event) {
|
|
||||||
Some(Event::PTRACE_EVENT_FORK) => info!("process {} forked", pid),
|
|
||||||
Some(Event::PTRACE_EVENT_VFORK) => info!("process {} vforked", pid),
|
|
||||||
Some(Event::PTRACE_EVENT_CLONE) => info!("process {} cloned", pid),
|
|
||||||
Some(Event::PTRACE_EVENT_EXEC) => info!("process {} execed", pid),
|
|
||||||
Some(Event::PTRACE_EVENT_VFORK_DONE) => {
|
|
||||||
info!("process {} returned from vfork", pid)
|
|
||||||
}
|
|
||||||
Some(Event::PTRACE_EVENT_EXIT) => info!("process {} exited", pid),
|
|
||||||
Some(Event::PTRACE_EVENT_SECCOMP) => {
|
|
||||||
info!("process {} triggered a seccomp rule", pid)
|
|
||||||
}
|
|
||||||
Some(Event::PTRACE_EVENT_STOP) => info!("process {} stopped", pid),
|
|
||||||
|
|
||||||
Some(e) => warn!("new ptrace event added: {:?}", e),
|
|
||||||
None => warn!("unrecognised ptrace event: {}", event),
|
|
||||||
},
|
|
||||||
WaitStatus::Stopped(pid, signal) => {
|
|
||||||
info!("process {} stopped with signal {}", pid, signal)
|
|
||||||
}
|
|
||||||
s => warn!("unhandled signal: {:?}", s),
|
|
||||||
};
|
|
||||||
}
|
|
||||||
|
|
||||||
Ok(())
|
|
||||||
}
|
|
||||||
|
|
||||||
fn match_event(v: i32) -> Option<Event> {
|
|
||||||
match v {
|
|
||||||
1 => Some(Event::PTRACE_EVENT_FORK),
|
|
||||||
2 => Some(Event::PTRACE_EVENT_VFORK),
|
|
||||||
3 => Some(Event::PTRACE_EVENT_CLONE),
|
|
||||||
4 => Some(Event::PTRACE_EVENT_EXEC),
|
|
||||||
5 => Some(Event::PTRACE_EVENT_VFORK_DONE),
|
|
||||||
6 => Some(Event::PTRACE_EVENT_EXIT),
|
|
||||||
7 => Some(Event::PTRACE_EVENT_SECCOMP),
|
|
||||||
128 => Some(Event::PTRACE_EVENT_STOP),
|
|
||||||
_ => None,
|
|
||||||
}
|
|
||||||
}
|
|
||||||
Loading…
Reference in New Issue
Block a user