mirror of
https://github.com/uutils/coreutils
synced 2024-12-16 08:12:39 +00:00
85 lines
1.8 KiB
Rust
85 lines
1.8 KiB
Rust
#![crate_id(name="logname", version="1.0.0", author="Benoit Benedetti")]
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/*
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* This file is part of the uutils coreutils package.
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*
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* (c) Benoit Benedetti <benoit.benedetti@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/* last synced with: logname (GNU coreutils) 8.22 */
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#![allow(non_camel_case_types)]
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#![feature(macro_rules)]
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extern crate getopts;
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extern crate libc;
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use std::io::print;
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use std::os;
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use std::str;
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use libc::c_char;
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#[path = "../common/util.rs"] mod util;
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extern {
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// POSIX requires using getlogin (or equivalent code)
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pub fn getlogin() -> *libc::c_char;
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}
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unsafe fn get_userlogin() -> StrBuf {
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let login: *libc::c_char = getlogin();
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str::raw::from_c_str(login)
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}
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static NAME: &'static str = "logname";
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static VERSION: &'static str = "1.0.0";
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fn version() {
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println!("{} {}", NAME, VERSION);
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}
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fn main() {
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let args = os::args();
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let program = args.get(0).clone();
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//
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// Argument parsing
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//
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let opts = ~[
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getopts::optflag("h", "help", "display this help and exit"),
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getopts::optflag("V", "version", "output version information and exit"),
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];
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let matches = match getopts::getopts(args.tail(), opts) {
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Ok(m) => m,
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Err(f) => crash!(1, "Invalid options\n{}", f.to_err_msg())
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};
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if matches.opt_present("help") {
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version();
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println!("");
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println!("Usage:");
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println!(" {:s}", program);
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println!("");
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print(getopts::usage("print user's login name", opts).as_slice());
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return;
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}
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if matches.opt_present("version") {
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version();
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return;
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}
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exec();
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}
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fn exec() {
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unsafe {
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let userlogin = get_userlogin();
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println!("{:s}", userlogin);
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}
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}
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