Right now I'm using QuickJS to read standard input stream to d8 with
os.system(), to get around readline() not being capable of processing
Uint32Array from Chrome.
How would I go about translating working QuickJS code to extending d8 to
read standard input into TypedArray's?
#!/usr/bin/env -S /home/user/bin/qjs -m --std
// Read stdin to V8's d8, send to d8
// const stdin = os.system("./read_d8_stdin.js",
[`/proc/${pid.replace(/\D+/g, "")}/fd/0`]);
function read_d8_stdin([, path] = scriptArgs) {
try {
// Uint32Array to read message length into
const size = new Uint32Array(1);
const err = {
errno: 0
};
// Open /proc/PID/fd/0 for reading
const pipe = std.open(
path,
"rb",
err,
);
if (err.errno !== 0) {
throw `${std.strerror(err.errno)}: ${path}`;
}
// Read /proc/PID/fd/0 into Uint32Array
pipe.read(size.buffer, 0, 4);
// Uint8Array to read message into
const output = new Uint8Array(size[0]);
// Read /proc/PID/fd/0 into Uint8Array
pipe.read(output.buffer, 0, output.length);
// Uint8Array containing Uint32Array buffer in Uint8Array and
Uint8Array containing message
const data = new Uint8Array([...new Uint8Array(size.buffer),
...output]);
// Write Uint8Array to d8's stdin
std.out.write(data.buffer, 0, data.length);
std.out.flush();
// Exit and start again initiated from d8
std.exit(0);
} catch (e) {
// Handle error
const err = {
errno: 0
};
const file = std.open("qjsErr.txt", "w", err);
if (err.errno !== 0) {
file.puts(JSON.stringify(err));
file.close();
std.exit(1);
}
file.puts(JSON.stringify(e));
file.close();
std.out.puts(JSON.stringify(err));
std.exit(1);
}
}
read_d8_stdin();
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