Makefile

@@ -29,7 +29,7 @@ RUSTLIBS = --extern getopt=build/o/libgetopt.rlib \
 CFLAGS += -I$(SYSEXITS)
 
 .PHONY: all
-all: dj false fop hru intcmp mm npc rpn scrut str strcmp swab true
+all: dj eep 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
@@ -118,6 +118,13 @@ scrut: build/bin/scrut
 build/bin/scrut: src/scrut.c build
 	$(CC) $(CFLAGS) -o $@ src/scrut.c
 
+.PHONY: eep
+eep: build/bin/eep
+build/bin/eep: src/eep.rs build rustlibs
+	$(RUSTC) $(RUSTFLAGS) \
+		--extern sysexits=build/o/libsysexits.rlib \
+		-o $@ src/eep.rs
+
 .PHONY: str
 str: build/bin/str
 build/bin/str: src/str.c build

docs/eep.1

@@ -0,0 +1,43 @@
+.\" Copyright (c) 2024 DTB <trinity@trinity.moe>
+.\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
+.\"
+.\" 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 EEP 1
+.SH NAME
+eep \(en wait a moment
+.\"
+.SH SYNOPSIS
+
+eep
+.RB [ seconds ]
+.\"
+.SH DESCRIPTION
+
+Wait a specified number of seconds before exiting.
+.\"
+.SH DIAGNOSTICS
+
+If the specified time fails to elapse or in the case of incorrect invocation,
+the program will exit unsuccessfully. In the latter scenario, a debug message
+will be printed.
+.\"
+.SH CAVEATS
+
+User may still be tired after invocation.
+.\"
+.SH AUTHOR
+
+Written by DTB
+.MT trinity@trinity.moe
+.ME .
+.\"
+.SH COPYRIGHT
+
+Copyright \(co 2024 DTB. License AGPLv3+: GNU AGPL version 3 or later
+<https://gnu.org/licenses/gpl.html>.
+.\"
+.SH SEE ALSO
+.BR sleep (3p)
+.BR sleep (1p)

src/eep.rs

@@ -0,0 +1,47 @@
+/*
+ * 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
+ * the terms of the GNU Affero General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see https://www.gnu.org/licenses/.
+ */
+
+use std::{
+	env::args,
+	process::ExitCode,
+	thread::sleep,
+	time::Duration
+};
+
+extern crate sysexits;
+use sysexits::EX_USAGE;
+
+fn usage(s: &str) -> ExitCode {
+	eprintln!("Usage: {} [seconds]", s);
+	ExitCode::from(EX_USAGE as u8)
+}
+
+fn main() -> ExitCode {
+	let argv = args().collect::<Vec<String>>();
+
+	if argv.len() == 2 {
+		if let Ok(s) = argv[1].parse::<u64>() {
+			sleep(Duration::from_secs(s)); /* from_secs needs u64 */
+			ExitCode::SUCCESS
+		} else {
+			usage(&argv[0])
+		}
+	} else {
+		usage(&argv[0])
+	}
+}