From adbbb81f7a82829363b41f6de8fc403caece3f33 Mon Sep 17 00:00:00 2001
From: Timo Weingärtner <timo@tiwe.de>
Date: Mon, 17 May 2021 13:10:24 +0200
Subject: add SOCK_NONBLOCK on listen socket creation to possibly save a
 syscall

---
 ssh-agent-filter.C | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ssh-agent-filter.C b/ssh-agent-filter.C
index 61255a0..cadfd1d 100644
--- a/ssh-agent-filter.C
+++ b/ssh-agent-filter.C
@@ -88,6 +88,9 @@ using std::pair;
 #ifndef SOCK_CLOEXEC
 #define SOCK_CLOEXEC 0
 #endif
+#ifndef SOCK_NONBLOCK
+#define SOCK_NONBLOCK 0
+#endif
 
 vector<string> allowed_b64;
 vector<string> allowed_md5;
@@ -172,7 +175,7 @@ int make_upstream_agent_conn () {
 }
 
 int make_listen_sock () {
-	int const sock = make_cloexec_socket(AF_UNIX, SOCK_STREAM, 0);
+	int const sock = make_cloexec_socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0);
 
 	alter_fd_flags<F_SETFL, O_NONBLOCK, 0>(sock);
 
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