mm(1): treats trailing arguments as optargs for the last opt

src/mm.rs

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
+ * Copyright (c) 2024 DTB <trinity@trinity.moe>
  * SPDX-License-Identifier: AGPL-3.0-or-later
  *
  * This program is free software: you can redistribute it and/or modify it under
@@ -32,6 +33,8 @@ use getopt::GetOpt;
 use strerror::StrError;
 use sysexits::{ EX_IOERR, EX_USAGE };
 
+enum ArgMode{ In, Out }
+
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<_>>();
 	let usage = format!("Usage: {} [-aetu] [-i input] [-o output]", argv[0]);
@@ -42,6 +45,8 @@ fn main() -> ExitCode {
 	let mut u = false; /* unbuffer i/o */
 	let mut ins = Vec::new(); /* initial input file path vector */
 	let mut outs = Vec::new(); /* initial output file path vector */
+	let mut mode: Option<ArgMode> = None; /* mode for positional arguments */
+	let mut optind = 0;
 
 	while let Some(opt) = argv.getopt("aei:o:tu") {
 		match opt.opt() {
@@ -49,19 +54,33 @@ fn main() -> ExitCode {
 			Ok("e") => e = true, 
 			Ok("u") => u = true,
 			Ok("t") => t = false,
-			Ok("i") => { /* add input */
+			Ok("i") => { /* add inputs */
 				let input = opt.arg().unwrap();
 				ins.push(input);
+				mode = Some(ArgMode::In);
 			},
 			Ok("o") => { /* add output */
 				let output = opt.arg().unwrap(); 
 				outs.push(output);
+				mode = Some(ArgMode::Out);
 			},
 			Err(_) | Ok(_) => {
 				eprintln!("{}", usage);
 				return ExitCode::from(EX_USAGE as u8);
 			},
 		};
+		optind = opt.ind();
+	}
+
+	let remaining = argv.iter().skip(optind);
+
+	if let Some(m) = mode {
+		for arg in remaining {
+			match m {
+				ArgMode::In => ins.push(arg.to_string()),
+				ArgMode::Out => outs.push(arg.to_string()),
+			};
+		}
 	}
 
 	/* use stdin if no inputs are specified */