From b1f90eff1157d73f8fd2073b45aefc845f1484a2 Mon Sep 17 00:00:00 2001
From: DTB <trinity@trinity.moe>
Date: Thu, 18 Apr 2024 22:36:24 -0600
Subject: [PATCH] retval(1): Rewrite in Rust

---
 {peek => Retired/peek}/Makefile |  0
 {peek => Retired/peek}/peek.1   |  0
 {peek => Retired/peek}/peek.c   |  0
 retval/Makefile                 |  6 ++++--
 retval/retval.rs                | 18 ++++++++++++++++++
 5 files changed, 22 insertions(+), 2 deletions(-)
 rename {peek => Retired/peek}/Makefile (100%)
 rename {peek => Retired/peek}/peek.1 (100%)
 rename {peek => Retired/peek}/peek.c (100%)
 create mode 100644 retval/retval.rs

diff --git a/peek/Makefile b/Retired/peek/Makefile
similarity index 100%
rename from peek/Makefile
rename to Retired/peek/Makefile
diff --git a/peek/peek.1 b/Retired/peek/peek.1
similarity index 100%
rename from peek/peek.1
rename to Retired/peek/peek.1
diff --git a/peek/peek.c b/Retired/peek/peek.c
similarity index 100%
rename from peek/peek.c
rename to Retired/peek/peek.c
diff --git a/retval/Makefile b/retval/Makefile
index f954e17..ecbf7af 100644
--- a/retval/Makefile
+++ b/retval/Makefile
@@ -1,2 +1,4 @@
-retval: retval.c
-	$(CC) -o retval retval.c
+RUSTC = rustc
+
+retval: retval.rs
+	$(RUSTC) $(RUSTCFLAGS) -o retval retval.rs
diff --git a/retval/retval.rs b/retval/retval.rs
new file mode 100644
index 0000000..50de9c0
--- /dev/null
+++ b/retval/retval.rs
@@ -0,0 +1,18 @@
+use std::{env::args, process::ExitCode};
+
+fn usage(s: &str) -> ExitCode {
+    eprintln!("Usage: {} [status]", s);
+    ExitCode::from(64 /* NetBSD sysexits(3) 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]),
+    }
+}