From 6d537c419e7a77e740d8b581ecc05afee28c7dae Mon Sep 17 00:00:00 2001
From: Tatsuhiro Tsujikawa <tatsuhiro.t@gmail.com>
Date: Sun, 7 Jun 2015 00:05:33 +0900
Subject: [PATCH] nghttpx: Document failure case on bind()

---
 src/shrpx.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/shrpx.cc b/src/shrpx.cc
index ba5c023a..1392c450 100644
--- a/src/shrpx.cc
+++ b/src/shrpx.cc
@@ -357,6 +357,9 @@ std::unique_ptr<AcceptHandler> create_acceptor(ConnectionHandler *handler,
     }
 #endif // TCP_DEFER_ACCEPT
 
+    // When we are executing new binary, and the old binary did not
+    // bind privileged port (< 1024) for some reason, binding to those
+    // ports will fail with permission denied error.
     if (bind(fd, rp->ai_addr, rp->ai_addrlen) == -1) {
       auto error = errno;
       LOG(WARN) << "bind() syscall failed, error=" << error;