diff --git a/.gitignore b/.gitignore
index fccf2be..bdc4116 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /target
 **/*.rs.bk
 .criterion
+sbocco.sh
diff --git a/Cargo.lock b/Cargo.lock
index 6a43491..52ffeea 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -408,6 +408,7 @@ dependencies = [
  "crypto-hash 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "memmap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rayon 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -519,6 +520,25 @@ name = "strsim"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "structopt"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "structopt-derive"
+version = "0.2.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "syn"
 version = "0.14.9"
@@ -710,6 +730,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_json 1.0.28 (registry+https://github.com/rust-lang/crates.io-index)" = "d30ec34ac923489285d24688c7a9c0898d16edff27fc1f1bd854edeff6ca3b7f"
 "checksum simplelog 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "24b615b1a3cc51ffa565d9a1d0cfcc49fe7d64737ada84eca284cddb0292d125"
 "checksum strsim 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4f380125926a99e52bc279241539c018323fab05ad6368b56f93d9369ff550"
+"checksum structopt 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "d8e9ad6a11096cbecdcca0cc6aa403fdfdbaeda2fb3323a39c98e6a166a1e45a"
+"checksum structopt-derive 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "4cbce8ccdc62166bd594c14396a3242bf94c337a51dbfa9be1076dd74b3db2af"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
 "checksum syn 0.15.4 (registry+https://github.com/rust-lang/crates.io-index)" = "9056ebe7f2d6a38bc63171816fd1d3430da5a43896de21676dc5c0a4b8274a11"
 "checksum synstructure 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "85bb9b7550d063ea184027c9b8c20ac167cd36d3e06b3a40bceb9d746dc1a7b7"
diff --git a/Cargo.toml b/Cargo.toml
index e3cdb28..2ca17c7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,7 @@ authors = ["bic <bicno@autistici.org>"]
 crypto-hash = "0.3.1"
 rayon = "1.0.2"
 memmap = "0.7.0"
+structopt = "0.2.10"
 
 [dev-dependencies]
 criterion = "0.1.2"
diff --git a/benches/sbocco.rs b/benches/sbocco.rs
index 22b9d48..7c4459c 100644
--- a/benches/sbocco.rs
+++ b/benches/sbocco.rs
@@ -4,10 +4,17 @@ extern crate rainbowcazzi;
 
 use criterion::Criterion;
 use rainbowcazzi::rainbow;
+use std::fs::File;
 
 fn criterion_benchmark(c: &mut Criterion) {
-    c.bench_function("sbocco", |b| b.iter(|| rainbow("assets/sbocco")));
-    c.bench_function("sbocchino", |b| b.iter(|| rainbow("assets/sbocchino")));
+    let infile = File::open("assets/sbocchino").unwrap();
+    c.bench_function("sbocchino", |b| b.iter(|| rainbow(&infile, true)));
+
+    let infile = File::open("assets/sbocco").unwrap();
+    c.bench_function("sbocco", |b| b.iter(|| rainbow(&infile, true)));
+
+    let infile = File::open("assets/sboccone").unwrap();
+    c.bench_function("sbocchino", |b| b.iter(|| rainbow(&infile, true)));
 }
 
 criterion_group!(benches, criterion_benchmark);
diff --git a/src/lib.rs b/src/lib.rs
index 727fdac..e460b43 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,20 +1,21 @@
 extern crate crypto_hash;
-extern crate rayon;
 extern crate memmap;
+extern crate rayon;
 
-use crypto_hash::{Algorithm, hex_digest};
-use std::fs::File;
+use crypto_hash::{hex_digest, Algorithm};
 use memmap::MmapOptions;
 use rayon::prelude::*;
+use std::fs::File;
 
-
-pub fn rainbow(file: &str) {
-    let file = File::open(file).unwrap();
-    let mmap = unsafe { MmapOptions::new().map(&file).unwrap() };
+pub fn rainbow(infile: &File, quiet: bool) {
+    let mmap = unsafe { MmapOptions::new().map(&infile).unwrap() };
 
     mmap.par_split(|c| *c == '\n' as u8)
         .map(|coso| {
-            let _hash = hex_digest(Algorithm::MD5, coso);
-            // println!("{}", _hash);
-        }).collect::<()>();
+            let hash = hex_digest(Algorithm::MD5, coso);
+            if !quiet {
+                println!("{}", hash);
+            }
+        })
+        .collect::<()>();
 }
diff --git a/src/main.rs b/src/main.rs
index 9813730..932c0d8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,22 @@
 extern crate rainbowcazzi;
+extern crate structopt;
 
 use rainbowcazzi::rainbow;
+use std::fs::File;
+use structopt::StructOpt;
 
-fn main() {
-    rainbow("assets/sbocco");
+#[derive(StructOpt, Debug)]
+struct Args {
+    #[structopt(short = "q", long = "quiet")]
+    quiet: bool,
+    #[structopt(name = "input")]
+    input: String,
 }
 
+fn main() {
+    let args = Args::from_args();
+
+    let infile = File::open(args.input).unwrap();
+
+    rainbow(&infile, args.quiet);
+}