shebang support for qjs

[maroziza]

I'm going to use qjs as system script interpreter. it works perfectly good, i added ioctl call as an shared library and qjs can configure all the system now but i have a problem running scripts with eXecutable status,
So adding #!/bin/qjs as the first line of the script renders file unrunnable.
I think there should be an option to run it as script interpreter and skip the first line.

For Node.js it can (but often doesn’t) look like this:

#!/usr/bin/node

Node.js will happily ignore this as a comment only if it is the very first line of the file (it won’t work even if there’s an empty line or //comment line before it). Browsers ignore it too (Chrome 74+, FF 67+).

I want also to note, that shebang is limited to 127 chars on 99.9% of systems due to kernel compile time buffer limit. It's limited in the kernel by BINPRM_BUF_SIZE.

[saghul]

There is code to support that in qjs, what error do you get?

[maroziza]

test file:

#!/bin/qjs
import * as std from "std";
import * as os from "os";
console.log("ok");

errors:

$ ./bdf2.js
SyntaxError: expecting '('
    at ./bdf2.js:2

$ qjs bdf2.js
SyntaxError: expecting '('
    at bdf2.js:2

[maroziza]

thanks, double checked the env and it was older branch of qjs, now it works