argued(1): re-write in Rust

Makefile

@@ -32,7 +32,7 @@ RUSTLIBS = --extern getopt=build/o/libgetopt.rlib \
 CFLAGS += -I$(SYSEXITS)
 
 .PHONY: all
-all: dj false fop hru intcmp mm npc retval rpn scrut str strcmp swab true
+all: argued dj false fop hru intcmp mm npc rpn scrut str strcmp swab true
 
 # keep build/include until bindgen(1) has stdin support
 # https://github.com/rust-lang/rust-bindgen/issues/2703
@@ -87,6 +87,11 @@ build/o/libsysexits.rlib: build/include/sysexits.h
 build/include/sysexits.h: build $(SYSEXITS)sysexits.h
 	printf '\043define EXIT_FAILURE 1\n' | cat - $(SYSEXITS)sysexits.h > $@
 
+.PHONY: argued
+argued: build/bin/argued
+build/bin/argued: src/argued.rs build
+	$(RUSTC) $(RUSTFLAGS) -o $@ src/argued.rs
+
 .PHONY: dj
 dj: build/bin/dj
 build/bin/dj: src/dj.c build
@@ -122,11 +127,6 @@ npc: build/bin/npc
 build/bin/npc: src/npc.c build
 	$(CC) $(CFLAGAS) -o $@ src/npc.c
 
-.PHONY: retval
-retval: build/bin/retval
-build/bin/retval: src/retval.rs build rustlibs
-	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/retval.rs
-
 .PHONY: rpn
 rpn: build/bin/rpn
 build/bin/rpn: src/rpn.rs build rustlibs

docs/argued.1

@@ -0,0 +1,28 @@
+.\" Copyright (c) 2022–2024 DTB <trinity@trinity.moe>
+.\"
+.\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
+.\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
+.\"
+.TH ARGUED 1 2024-07-23 "Harakit-overgrown X.X.X"
+.SH NAME
+argued \(en check for arguments
+.\"
+.SH DESCRIPTION
+
+.BR argued (1)
+exits successfully if any arguments are provided, and unsuccessfully
+otherwise.
+.\"
+.SH AUTHOR
+
+Written by DTB
+.MT trinity@trinity.moe
+.ME .
+.\"
+.SH COPYRIGHT
+
+This work is marked with CC0 1.0. To see a copy of this license, visit
+<http://creativecommons.org/publicdomain/zero/1.0>.
+.\"
+.SH SEE ALSO
+.BR test (1)

src/argued.rs

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 DTB <trinity@trinity.moe>
+ * Copyright (c) 2022_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
@@ -16,24 +16,13 @@
  * along with this program. If not, see https://www.gnu.org/licenses/.
  */
 
-use std::{ env::args, process::ExitCode };
+ use std::{ env::args, process::ExitCode };
 
-extern crate sysexits;
-use sysexits::EX_USAGE;
+ fn main() -> ExitCode {
+ 	let argv = args().collect::<Vec<String>>();
 
-fn usage(s: &str) -> ExitCode {
-	eprintln!("Usage: {} status", s);
-	ExitCode::from(EX_USAGE)
-}
-
-fn main() -> ExitCode {
-	let argv = args().collect::<Vec<String>>();
-
-	match argv.len() {
-		2 => match argv[1].parse::<u8>() {
-				Ok(e) => ExitCode::from(e),
-				_ => usage(&argv[0])
-			},
-		_ => usage(&argv[0])
-	}
-}
+ 	match argv.len() {
+ 		0 | 1 => ExitCode::FAILURE,
+ 		_ =>     ExitCode::SUCCESS
+ 	}
+ }