From 63f787b602f73dd348b6bbf2df795390e5c7411f Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sun, 21 Aug 2022 00:51:30 -0500
Subject: [PATCH] If the kernel hasn't got sendfile() it can return ENOSYS, not
 just EINVAL.

---
 lib/portability.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/portability.c b/lib/portability.c
index 6fac2c36..d955d081 100644
--- a/lib/portability.c
+++ b/lib/portability.c
@@ -651,7 +651,7 @@ long long sendfile_len(int in, int out, long long bytes, long long *consumed)
       errno = EINVAL;
       len = -1;
 #endif
-      if (len < 0 && errno == EINVAL) {
+      if (len < 0 && (errno == EINVAL || errno == ENOSYS)) {
         try_cfr = 0;
 
         continue;
-- 
2.39.2