fitsio 0.21.9

Rust implmentation of astronomy fits file handling
Documentation 
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use std::env;
use std::process;

fn main() {
    let mut nfiles = 0;
    env::args().skip(1).for_each(|arg| {
        if fitsio::FitsFile::open(arg)
            .map(|mut f| f.pretty_print())
            .is_ok()
        {
            nfiles += 1;
        }
    });

    if nfiles == 0 {
        eprintln!("No valid fits files supplied");
        process::exit(1);
    }
}