lancer / programs / stat / src / main.rs

#![no_std]
#![no_main]

use lancer_user::fs;
use lancer_user::net;
use lancer_user::println;
use lancer_user::syscall;

fn type_name(t: u8) -> &'static str {
    match t {
        0 => "file",
        1 => "directory",
        2 => "symlink",
        _ => "unknown",
    }
}

#[unsafe(no_mangle)]
pub extern "C" fn lancer_main() -> ! {
    let (rx, _tx) = match net::init() {
        Some(pair) => pair,
        None => {
            lancer_user::show!(net, error, "netsock init failed");
            syscall::exit();
        }
    };

    let mut args_buf = [0u8; 256];
    let args_len = net::recv_args(&rx, &mut args_buf);
    let args = &args_buf[..args_len];

    let (_cmd, rest) = net::next_token(args);
    let (path_tok, _) = net::next_token(rest);

    if path_tok.is_empty() {
        println!("usage: stat <path>");
        syscall::exit();
    }

    let mut client = unsafe { fs::init() };

    let handle = match fs::open_path_with_rights(&mut client, 0, path_tok, fs::FsRights::READ) {
        Ok(h) => h,
        Err(e) => {
            println!("stat: {}", e.name());
            syscall::exit();
        }
    };

    match client.stat(handle) {
        Ok(st) => {
            println!("type: {}", type_name(st.inode_type));
            println!("size: {}", st.size);
            println!("blocks: {}", st.block_count);
        }
        Err(e) => {
            println!("stat: {}", e.name());
        }
    }

    let _ = client.close(handle);
    syscall::exit()
}