Data commit

Task/File-size/Rust/file-size.rust

@@ -0,0 +1,18 @@
+use std::{env, fs, process};
+use std::io::{self, Write};
+use std::fmt::Display;
+
+fn main() {
+    let file_name = env::args().nth(1).unwrap_or_else(|| exit_err("No file name supplied", 1));
+    let metadata = fs::metadata(file_name).unwrap_or_else(|e| exit_err(e, 2));
+
+    println!("Size of file.txt is {} bytes", metadata.len());
+}
+
+#[inline]
+fn exit_err<T: Display>(msg: T, code: i32) -> ! {
+    writeln!(&mut io::stderr(), "Error: {}", msg).expect("Could not write to stdout");
+    process::exit(code)
+}
+
+}