From 1003c82d23be6e6db28e163dc18245a2373768c5 Mon Sep 17 00:00:00 2001
From: emma <emma@tebibyte.media>
Date: Sat, 10 Aug 2024 19:16:26 -0600
Subject: [PATCH] swab(1): uses pledge(2)

---
 src/swab.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/swab.rs b/src/swab.rs
index 671f485..27ce9a5 100644
--- a/src/swab.rs
+++ b/src/swab.rs
@@ -32,6 +32,10 @@ use getopt::GetOpt;
 use sysexits::{ EX_IOERR, EX_OK, EX_OSERR, EX_USAGE };
 use strerror::StrError;
 
+#[cfg(target_os="openbsd")] extern crate openbsd;
+#[cfg(target_os="openbsd")] use openbsd::{ Promises, pledge };
+
+
 fn oserr(argv0: &str, e: Error) -> ExitCode {
 	eprintln!("{}: {}", argv0, e.strerror());
 	ExitCode::from(EX_OSERR as u8)
@@ -49,6 +53,14 @@ fn usage(s: &str) -> ExitCode {
 
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
+	
+	if cfg!(target_os="openbsd") {
+		let promises = Promises::new("stdio");
+		if let Err(e) = pledge(Some(promises), None) {
+			return oserr(&argv[0], e);
+		}
+	}
+
 	let mut buf: Vec<u8> = Vec::new(); // holds the sequence getting swabbed
 	let mut input = stdin();
 	let mut output = stdout().lock();