[PATCH 1/2] xread: retry after poll on EAGAIN/EWOULDBLOCK

From: Eric Wong <e@80x24.org>
Date: Jun 26, 2016, 23:21 UTC
Message-ID: <20160626232112.721-2-e@80x24.org>
In-Reply-To: <20160626232112.721-1-e@80x24.org>

We should continue to loop after EAGAIN/EWOULDBLOCK as the intent of xread is to read as much as possible until an EOF or real error occurs.

Fixes: 1079c4be0b720 ("xread: poll on non blocking fds")

Signed-off-by: Eric Wong <e@80x24.org>
---
 wrapper.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wrapper.c b/wrapper.c
index 5dc4e15..f1155d0 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -255,6 +255,7 @@ ssize_t xread(int fd, void *buf, size_t len)
 				 * call to read(2).
 				 */
 				poll(&pfd, 1, -1);
+				continue;
 			}
 		}
 		return nr;