src/libopenbsd.rs

@@ -69,12 +69,14 @@ pub fn pledge(
 pub struct UnveilPerms(CString);
 
 impl UnveilPerms {
-	pub fn new<T: IntoIterator<Item = char>>(permissions: T) -> Self {
-		let perms = CString::new(
-			permissions.into_iter().collect::<String>()
-		).unwrap();
-		
-		UnveilPerms(perms)
+	pub fn new(permissions: Vec<char>) -> Self {
+		if permissions.is_empty() {
+			return UnveilPerms(CString::new("").unwrap());
+		}
+
+		UnveilPerms(
+			CString::new(permissions.iter().collect::<String>()).unwrap()
+		)
 	}
 }
 
@@ -85,9 +87,9 @@ pub fn unveil(
 	let path_c = path.map(CString::new).map(Result::unwrap);
 	let arg1 = path_c.map(|p| p.into_raw() as *const c_char).unwrap_or(null());
 
-	let arg2 = permissions.map(|p| {
-		p.0.into_raw() as *const c_char
-	}).unwrap_or(null());
+	let arg2 = permissions
+		.map(|p| p.0.into_raw() as *const c_char)
+		.unwrap_or(null());
 
 	unsafe {
 		match openbsd::unveil(arg1, arg2) {

src/mm.rs

@@ -115,7 +115,7 @@ fn main() -> ExitCode {
 
 	#[cfg(target_os="openbsd")] {
 		for input in &ins {
-			let perms = UnveilPerms::new(['r']);
+			let perms = UnveilPerms::new(vec!['r']);
 
 			if let Err(e) = unveil(Some(&input), Some(perms)) {
 				return err(&argv[0], e, Some(EX_OSERR));
@@ -123,7 +123,7 @@ fn main() -> ExitCode {
 		}
 
 		for output in &outs {
-			let perms = UnveilPerms::new(['c', 'w']);
+			let perms = UnveilPerms::new(vec!['c', 'w']);
 
 			if let Err(e) = unveil(Some(&output), Some(perms)) {
 				return err(&argv[0], e, Some(EX_OSERR));