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coreutils/yes/yes.rs

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#![crate_id(name="yes", vers="1.0.0", author="Seldaek")]
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/*
* 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: yes (GNU coreutils) 8.13 */
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#![feature(macro_rules)]
extern crate getopts;
extern crate libc;
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use std::os;
use std::io::{print, println};
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#[path = "../common/util.rs"]
mod util;
static NAME: &'static str = "yes";
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#[allow(dead_code)]
fn main() { os::set_exit_status(uumain(os::args())); }
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pub fn uumain(args: Vec<String>) -> int {
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let program = args.get(0).clone();
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let opts = [
getopts::optflag("h", "help", "display this help and exit"),
getopts::optflag("V", "version", "output version information and exit"),
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];
let matches = match getopts::getopts(args.tail(), opts) {
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Ok(m) => m,
Err(f) => {
crash!(1, "invalid options\n{}", f.to_err_msg())
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}
};
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if matches.opt_present("help") {
println!("yes 1.0.0");
println!("");
println!("Usage:");
println!(" {0:s} [STRING]... [OPTION]...", program);
println!("");
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print(getopts::usage("Repeatedly output a line with all specified STRING(s), or 'y'.", opts).as_slice());
return 0;
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}
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if matches.opt_present("version") {
println!("yes 1.0.0");
return 0;
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}
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let mut string = "y".to_string();
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if !matches.free.is_empty() {
string = matches.free.connect(" ");
}
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exec(string.as_slice());
return 0;
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}
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pub fn exec(string: &str) {
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loop {
println(string);
}
}