From 8b24ad83a8fef5cb5e81089f6699542f95820dc8 Mon Sep 17 00:00:00 2001
From: Christian Svensson <blue@cmd.nu>
Date: Sun, 16 Aug 2020 20:45:25 +0200
Subject: [PATCH] Document why we pad blanks

---
 unix/syscall_linux.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/unix/syscall_linux.go b/unix/syscall_linux.go
index f66c515b..2226e637 100644
--- a/unix/syscall_linux.go
+++ b/unix/syscall_linux.go
@@ -894,6 +894,9 @@ type SockaddrIUCV struct {
 
 func (sa *SockaddrIUCV) sockaddr() (unsafe.Pointer, _Socklen, error) {
 	sa.raw.Family = AF_IUCV
+	// These are EBCDIC encoded by the kernel, but we still need to pad them
+	// with blanks. Initializing with blanks allows the caller to feed in either
+	// a padded or an unpadded string.
 	for i := 0; i < 8; i++ {
 		sa.raw.Nodeid[i] = ' '
 		sa.raw.User_id[i] = ' '