From faebe1d04303704c9fc4b2a8333f30bf55c3d73c Mon Sep 17 00:00:00 2001
From: hyung-hwan <hyunghwan.chung@gmail.com>
Date: Sun, 15 Oct 2023 16:02:09 +0900
Subject: [PATCH] changed dev_sck_sendfile_stream to handle return value of 0
 by sendfile as if it's EWOULDBLOCK

---
 lib/err.c        | 1 -
 lib/hio-cfg.h.in | 3 +--
 lib/sck.c        | 1 +
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/err.c b/lib/err.c
index 8c721e6..12dba7c 100644
--- a/lib/err.c
+++ b/lib/err.c
@@ -404,4 +404,3 @@ void hio_seterrufmtwithsyserr (hio_t* hio, int syserr_type, int syserr_code, con
 		}
 	}*/
 }
-
diff --git a/lib/hio-cfg.h.in b/lib/hio-cfg.h.in
index 073e8c0..1f16949 100644
--- a/lib/hio-cfg.h.in
+++ b/lib/hio-cfg.h.in
@@ -30,8 +30,7 @@
 /* Define to 1 if you have the `CRYPTO_cleanup_all_ex_data' function. */
 #undef HAVE_CRYPTO_CLEANUP_ALL_EX_DATA
 
-/* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
-   */
+/* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'. */
 #undef HAVE_DIRENT_H
 
 /* Define to 1 if you have the `dirfd' function. */
diff --git a/lib/sck.c b/lib/sck.c
index 5941a7c..321968b 100644
--- a/lib/sck.c
+++ b/lib/sck.c
@@ -1122,6 +1122,7 @@ static int dev_sck_sendfile_stream (hio_dev_t* dev, hio_syshnd_t in_fd, hio_foff
 			return -1;
 		}
 		*len = x;
+		if (x == 0) return 0; /* treat it like EWOULDBLOCK? */
 #else
 		hio_seterrnum (hio, HIO_ENOIMPL);
 		return -1;