From 055f920ebe21b8e05235363bc11a83cc649cdc6a Mon Sep 17 00:00:00 2001
From: Martin Matuska <mm@FreeBSD.org>
Date: Sun, 9 Jul 2023 01:04:25 +0200
Subject: [PATCH] cat: fallback on EBADF with copy_file_range(2)

When stdout is opened with O_APPEND, copy_file_range(2) fails with EBADF.
---
 bin/cat/cat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/cat/cat.c b/bin/cat/cat.c
index 1158a839cfd..44a406dd037 100644
--- a/bin/cat/cat.c
+++ b/bin/cat/cat.c
@@ -283,7 +283,7 @@ scanfiles(char *argv[], int cooked __unused)
 		} else {
 #ifndef BOOTSTRAP_CAT
 			if (in_kernel_copy(fd) == -1) {
-				if (errno == EINVAL)
+				if (errno == EINVAL || errno == EBADF)
 					raw_cat(fd);
 				else
 					err(1, "stdout");