From dc5e6676a70caf93d610865ef7883401143280fb Mon Sep 17 00:00:00 2001
From: Robert Swiecki <robert@swiecki.net>
Date: Thu, 15 Feb 2018 01:33:33 +0100
Subject: [PATCH] nsjail: ignore SIGTTIN/SIGTTOU

---
 nsjail.cc | 4 ++++
 nsjail.h  | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/nsjail.cc b/nsjail.cc
index 19632c5..3b53077 100644
--- a/nsjail.cc
+++ b/nsjail.cc
@@ -65,6 +65,10 @@ static bool nsjailSetSigHandler(int sig) {
 	sa.sa_mask = smask;
 	sa.sa_flags = 0;
 	sa.sa_restorer = NULL;
+
+	if (sig == SIGTTIN || sig == SIGTTOU) {
+		sa.sa_handler = SIG_IGN;
+	};
 	if (sigaction(sig, &sa, NULL) == -1) {
 		PLOG_E("sigaction(%d)", sig);
 		return false;
diff --git a/nsjail.h b/nsjail.h
index a7d180c..cabad36 100644
--- a/nsjail.h
+++ b/nsjail.h
@@ -44,6 +44,8 @@ static const int nssigs[] = {
     SIGALRM,
     SIGCHLD,
     SIGTERM,
+    SIGTTIN,
+    SIGTTOU,
 };
 
 struct pids_t {