intcmp(1): adds null unveil

src/intcmp.rs

@@ -26,27 +26,35 @@ extern crate getopt;
 extern crate sysexits;
 
 use getopt::GetOpt;
-use sysexits::EX_USAGE;
+use sysexits::{ EX_DATAERR, EX_USAGE };
 
 #[cfg(target_os="openbsd")] use sysexits::EX_OSERR;
 #[cfg(target_os="openbsd")] extern crate openbsd;
 #[cfg(target_os="openbsd")] extern crate strerror;
-#[cfg(target_os="openbsd")] use openbsd::{ Promises, pledge };
+#[cfg(target_os="openbsd")] use openbsd::{ Promises, pledge, unveil };
 #[cfg(target_os="openbsd")] use strerror::StrError;
 
-fn usage(s: &str) -> ExitCode {
+fn err(argv0: &String, e: String, code: u8) -> ExitCode {
-	eprintln!("Usage: {} [-egl] integer integer...", s);
+	eprintln!("{}: {}", argv0, e);
-	ExitCode::from(EX_USAGE as u8)
+	ExitCode::from(code)
+}
+
+fn usage(argv0: &str) -> ExitCode {
+	eprintln!("Usage: {} [-egl] integer integer...", argv0);
+	ExitCode::from(EX_USAGE)
 }
 
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
 
 	#[cfg(target_os="openbsd")] {
-		let promises = Promises::new("stdio");
+		let promises = Promises::new("stdio unveil");
 		if let Err(e) = pledge(Some(promises), None) {
-			eprintln!("{}: {}", argv[0], e.strerror());
+			return err(&argv[0], e.strerror(), EX_OSERR);
-			return ExitCode::from(EX_OSERR as u8);
+		}
+
+		if let Err(e) = unveil(None, None) {
+			return err(&argv[0], e.strerror(), EX_OSERR);
 		}
 	}
 
@@ -78,8 +86,8 @@ fn main() -> ExitCode {
 		match arg.parse::<usize>() { /* parse current operand */
 			Ok(n) => currn = n,
 			Err(e) => {
-				eprintln!("{}: {}: {}", &argv[0], arg, e);
+				let error = arg.to_owned() + ": " + &e.to_string();
-				return ExitCode::from(EX_USAGE as u8);
+				return err(&argv[0], error, EX_DATAERR);
 			}
 		}