From a19f48d8400583f72648ce506f6dc0f14d7d9442 Mon Sep 17 00:00:00 2001
From: Klemens Nanni <kn@openbsd.org>
Date: Fri, 22 Jan 2021 22:01:59 +0100
Subject: [PATCH] Call pledge(2) after unveil(2)

Simplify logic, be more idiomatic and finalize by pledging after
all unveiling is done by omitting the "unveil" promise and thereby
not allowing further calls to it.
---
 chat.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/chat.c b/chat.c
index f455b35..87daccd 100644
--- a/chat.c
+++ b/chat.c
@@ -142,13 +142,7 @@ static void unveilData(const char *name) {
 	}
 }
 
-static void sandbox(const char *trust, const char *cert, const char *priv) {
-	int error = pledge(
-		"stdio rpath wpath cpath inet dns tty proc exec unveil", NULL
-	);
-	if (error) err(EX_OSERR, "pledge");
-	if (!self.restricted) return;
-
+static void unveilAll(const char *trust, const char *cert, const char *priv) {
 	dataMkdir("");
 	unveilData("");
 	if (trust) unveilConfig(trust);
@@ -161,7 +155,6 @@ static void sandbox(const char *trust, const char *cert, const char *priv) {
 	} paths[] = {
 		{ "/usr/share/terminfo", "r" },
 		{ tls_default_ca_cert_file(), "r" },
-		{ NULL, NULL },
 	};
 	for (size_t i = 0; i < ARRAY_LEN(paths); ++i) {
 		int error = unveil(paths[i].path, paths[i].perm);
@@ -285,7 +278,9 @@ int main(int argc, char *argv[]) {
 	commandCompleteAdd();
 
 #ifdef __OpenBSD__
-	sandbox(trust, cert, priv);
+	if (self.restricted) unveilAll(trust, cert, priv);
+	int error = pledge("stdio rpath wpath cpath inet dns tty proc exec", NULL);
+	if (error) err(EX_OSERR, "pledge");
 #endif
 
 	ircConfig(insecure, trust, cert, priv);