File 0478-SELinux-is-another-cause-of-MSG_CTRUNC.patch of Package erlang

From f29c1d4bc5ac7cb578206a1193867c9037741bd3 Mon Sep 17 00:00:00 2001
From: Alexander Clouter <alex@digriz.org.uk>
Date: Thu, 27 Sep 2018 15:17:29 +0100
Subject: [PATCH 1/2] SELinux is another cause of MSG_CTRUNC

https://github.com/termux/termux-packages/issues/2882
---
 erts/emulator/sys/unix/sys_uds.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/erts/emulator/sys/unix/sys_uds.c b/erts/emulator/sys/unix/sys_uds.c
index 39a4866065..c9f73622ba 100644
--- a/erts/emulator/sys/unix/sys_uds.c
+++ b/erts/emulator/sys/unix/sys_uds.c
@@ -88,8 +88,9 @@ sys_uds_readv(int fd, struct iovec *iov, size_t iov_len,
     if((msg.msg_flags & MSG_CTRUNC) == MSG_CTRUNC)
     {
         /* We assume that we have given enough space for any header
-           that are sent to us. So the only remaining reason to get
-           this flag set is if the caller has run out of file descriptors.
+           that are sent to us. So the only remaining reasons to get
+           this flag set is if the caller has run out of file descriptors
+           or an SELinux policy prunes the response (eg. O_APPEND on STDERR).
         */
         errno = EMFILE;
         return -1;
-- 
2.16.4