coreutils/yes/yes.rs

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#[link(name="yes", vers="1.0.0", author="Seldaek")];
/*
* 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 */
extern mod extra;
use std::os;
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use std::io::stderr;
use extra::getopts::groups;
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fn main() {
let args = os::args();
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let program = args[0].clone();
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let opts = ~[
groups::optflag("h", "help", "display this help and exit"),
groups::optflag("V", "version", "output version information and exit"),
];
let matches = match groups::getopts(args.tail(), opts) {
Ok(m) => m,
Err(f) => {
writeln!(&mut stderr() as &mut Writer,
"Invalid options\n{}", f.to_err_msg());
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os::set_exit_status(1);
return
}
};
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if matches.opt_present("help") {
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println("yes 1.0.0");
println("");
println("Usage:");
println!(" {0:s} [STRING]... [OPTION]...", program);
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println("");
print(groups::usage("Repeatedly output a line with all specified STRING(s), or 'y'.", opts));
return;
}
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if matches.opt_present("version") {
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println("yes 1.0.0");
return;
}
let mut string = ~"y";
if !matches.free.is_empty() {
string = matches.free.connect(" ");
}
exec(string);
}
pub fn exec(string: ~str) {
loop {
println(string);
}
}