132 lines
3.6 KiB
Rust
132 lines
3.6 KiB
Rust
use crate::clocks::WasiClocks;
|
|
use crate::dir::{DirCaps, DirEntry, WasiDir};
|
|
use crate::file::{FileCaps, FileEntry, WasiFile};
|
|
use crate::sched::WasiSched;
|
|
use crate::string_array::{StringArray, StringArrayError};
|
|
use crate::table::Table;
|
|
use crate::Error;
|
|
use cap_rand::RngCore;
|
|
use std::path::{Path, PathBuf};
|
|
|
|
pub struct WasiCtx {
|
|
pub args: StringArray,
|
|
pub env: StringArray,
|
|
pub random: Box<dyn RngCore + Send + Sync>,
|
|
pub clocks: WasiClocks,
|
|
pub sched: Box<dyn WasiSched>,
|
|
pub table: Table,
|
|
}
|
|
|
|
impl WasiCtx {
|
|
pub fn new(
|
|
random: Box<dyn RngCore + Send + Sync>,
|
|
clocks: WasiClocks,
|
|
sched: Box<dyn WasiSched>,
|
|
table: Table,
|
|
) -> Self {
|
|
let mut s = WasiCtx {
|
|
args: StringArray::new(),
|
|
env: StringArray::new(),
|
|
random,
|
|
clocks,
|
|
sched,
|
|
table,
|
|
};
|
|
s.set_stdin(Box::new(crate::pipe::ReadPipe::new(std::io::empty())));
|
|
s.set_stdout(Box::new(crate::pipe::WritePipe::new(std::io::sink())));
|
|
s.set_stderr(Box::new(crate::pipe::WritePipe::new(std::io::sink())));
|
|
s
|
|
}
|
|
|
|
pub fn insert_file(&mut self, fd: u32, file: Box<dyn WasiFile>, caps: FileCaps) {
|
|
self.table()
|
|
.insert_at(fd, Box::new(FileEntry::new(caps, file)));
|
|
}
|
|
|
|
pub fn push_file(&mut self, file: Box<dyn WasiFile>, caps: FileCaps) -> Result<u32, Error> {
|
|
self.table().push(Box::new(FileEntry::new(caps, file)))
|
|
}
|
|
|
|
pub fn insert_dir(
|
|
&mut self,
|
|
fd: u32,
|
|
dir: Box<dyn WasiDir>,
|
|
caps: DirCaps,
|
|
file_caps: FileCaps,
|
|
path: PathBuf,
|
|
) {
|
|
self.table().insert_at(
|
|
fd,
|
|
Box::new(DirEntry::new(caps, file_caps, Some(path), dir)),
|
|
);
|
|
}
|
|
|
|
pub fn push_dir(
|
|
&mut self,
|
|
dir: Box<dyn WasiDir>,
|
|
caps: DirCaps,
|
|
file_caps: FileCaps,
|
|
path: PathBuf,
|
|
) -> Result<u32, Error> {
|
|
self.table()
|
|
.push(Box::new(DirEntry::new(caps, file_caps, Some(path), dir)))
|
|
}
|
|
|
|
pub fn table(&mut self) -> &mut Table {
|
|
&mut self.table
|
|
}
|
|
|
|
pub fn push_arg(&mut self, arg: &str) -> Result<(), StringArrayError> {
|
|
self.args.push(arg.to_owned())
|
|
}
|
|
|
|
pub fn push_env(&mut self, var: &str, value: &str) -> Result<(), StringArrayError> {
|
|
self.env.push(format!("{}={}", var, value))?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn set_stdin(&mut self, mut f: Box<dyn WasiFile>) {
|
|
let rights = Self::stdio_rights(&mut *f);
|
|
self.insert_file(0, f, rights);
|
|
}
|
|
|
|
pub fn set_stdout(&mut self, mut f: Box<dyn WasiFile>) {
|
|
let rights = Self::stdio_rights(&mut *f);
|
|
self.insert_file(1, f, rights);
|
|
}
|
|
|
|
pub fn set_stderr(&mut self, mut f: Box<dyn WasiFile>) {
|
|
let rights = Self::stdio_rights(&mut *f);
|
|
self.insert_file(2, f, rights);
|
|
}
|
|
|
|
fn stdio_rights(f: &mut dyn WasiFile) -> FileCaps {
|
|
let mut rights = FileCaps::all();
|
|
|
|
// If `f` is a tty, restrict the `tell` and `seek` capabilities, so
|
|
// that wasi-libc's `isatty` correctly detects the file descriptor
|
|
// as a tty.
|
|
if f.isatty() {
|
|
rights &= !(FileCaps::TELL | FileCaps::SEEK);
|
|
}
|
|
|
|
rights
|
|
}
|
|
|
|
pub fn push_preopened_dir(
|
|
&mut self,
|
|
dir: Box<dyn WasiDir>,
|
|
path: impl AsRef<Path>,
|
|
) -> Result<(), Error> {
|
|
let caps = DirCaps::all();
|
|
let file_caps = FileCaps::all();
|
|
self.table().push(Box::new(DirEntry::new(
|
|
caps,
|
|
file_caps,
|
|
Some(path.as_ref().to_owned()),
|
|
dir,
|
|
)))?;
|
|
Ok(())
|
|
}
|
|
}
|