1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
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.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(())
}
}