coreutils/whoami/whoami.rs
2014-05-28 14:22:52 +02:00

78 lines
1.8 KiB
Rust

#![crate_id(name="whoami", version="1.0.0", author="KokaKiwi")]
/*
* This file is part of the uutils coreutils package.
*
* (c) Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/* last synced with: whoami (GNU coreutils) 8.21 */
#![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 c_types::{c_passwd, getpwuid};
#[path = "../common/util.rs"] mod util;
#[path = "../common/c_types.rs"] mod c_types;
extern {
pub fn geteuid() -> libc::c_int;
}
unsafe fn getusername() -> String {
let passwd: *c_passwd = getpwuid(geteuid());
let pw_name: *libc::c_char = (*passwd).pw_name;
let name = str::raw::from_c_str(pw_name);
name
}
static NAME: &'static str = "whoami";
fn main() { uumain(os::args()); }
pub fn uumain(args: Vec<String>) {
let program = args.get(0).as_slice();
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, "{}", f.to_err_msg()),
};
if matches.opt_present("help") {
println!("whoami 1.0.0");
println!("");
println!("Usage:");
println!(" {:s}", program);
println!("");
print(getopts::usage("print effective userid", opts).as_slice());
return;
}
if matches.opt_present("version") {
println!("whoami 1.0.0");
return;
}
exec();
}
pub fn exec() {
unsafe {
let username = getusername();
println!("{:s}", username);
}
}