#![crate_id(name="logname", version="1.0.0", author="Benoit Benedetti")] /* * This file is part of the uutils coreutils package. * * (c) Benoit Benedetti * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ /* last synced with: logname (GNU coreutils) 8.22 */ #![allow(non_camel_case_types)] #![feature(macro_rules)] extern crate getopts; extern crate libc; use std::io::print; use std::os; use std::str; use libc::c_char; #[path = "../common/util.rs"] mod util; extern { // POSIX requires using getlogin (or equivalent code) pub fn getlogin() -> *libc::c_char; } unsafe fn get_userlogin() -> StrBuf { let login: *libc::c_char = getlogin(); str::raw::from_c_str(login) } static NAME: &'static str = "logname"; static VERSION: &'static str = "1.0.0"; fn version() { println!("{} {}", NAME, VERSION); } fn main() { let args = os::args(); let program = args.get(0).clone(); // // Argument parsing // let opts = ~[ getopts::optflag("h", "help", "display this help and exit"), getopts::optflag("V", "version", "output version information and exit"), ]; let matches = match getopts::getopts(args.tail(), opts) { Ok(m) => m, Err(f) => crash!(1, "Invalid options\n{}", f.to_err_msg()) }; if matches.opt_present("help") { version(); println!(""); println!("Usage:"); println!(" {:s}", program); println!(""); print(getopts::usage("print user's login name", opts).as_slice()); return; } if matches.opt_present("version") { version(); return; } exec(); } fn exec() { unsafe { let userlogin = get_userlogin(); println!("{:s}", userlogin); } }