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#![feature(test)]
#![feature(plugin,collections,str_char)] // For peg
#![plugin(peg_syntax_ext)]
extern crate test;
extern crate time;
extern crate getopts;
extern crate regex;
mod line;
mod filter;
pub use line::Line;
use std::io::{stdin,stdout,stderr,Write,BufRead};
fn print_usage(prog: &str, opts: getopts::Options) {
print!("{}", opts.usage(format!("Usage: {} [options] <filter>", prog).as_ref()));
std::process::exit(1);
}
fn main() {
let mut opts = getopts::Options::new();
opts.optflag("", "vhost2ident", "normalize hostname into ident field");
opts.optflag("h", "help", "print this help");
opts.optflag("q", "quiet", "suppress warnings about unrecognized lines");
let mut args = std::env::args();
let prog = args.next().unwrap();
let m = opts.parse(args).unwrap();
if m.opt_present("h") {
return print_usage(prog.as_ref(), opts);
}
let vhost2ident = m.opt_present("vhost2ident");
let quiet = m.opt_present("q");
let filter = if m.free.is_empty() {
return print_usage(prog.as_ref(), opts);
} else {
m.free[0].clone()
};
let filter = match filter::Filter::new(filter.as_ref()) {
Ok(x) => x,
Err(_) => {
println!("Invalid filter '{}'", filter);
return;
}
};
let s = stdin();
let o = stdout();
let mut o = o.lock();
for l in s.lock().lines().map(|x| x.unwrap()) {
let mut line = match Line::new(l.as_ref()) {
Ok(x) => x,
Err(_) => {
if !quiet {
writeln!(&mut stderr(), "Unrecognized line: {}", l).unwrap();
}
continue;
}
};
if vhost2ident {
line.vhost2ident();
}
if filter.apply(&line) {
line.write(&mut o).unwrap();
o.write_all("\n".as_bytes()).unwrap();
}
}
}
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