From 74cd5499ea794ebfb874b9fe6a4edc6f29ea124d Mon Sep 17 00:00:00 2001
From: Nicolas Pennequin <nicolas@nicolas-laptop.(none)>
Date: Thu, 11 Oct 2007 18:25:33 +0200
Subject: [PATCH] Check for the case when no data is ready and the required
 size was 0.

---
 apps/buffering.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/apps/buffering.c b/apps/buffering.c
index 6e7d6ce88..a10b66065 100644
--- a/apps/buffering.c
+++ b/apps/buffering.c
@@ -828,6 +828,11 @@ ssize_t bufread(int handle_id, size_t size, char *dest)
     if (!h)
         return -1;
 
+    if (size == 0 && h->filerem > 0 &&
+        h->available - RINGBUF_SUB(h->ridx, h->data) == 0)
+        /* Data isn't ready */
+        return -2;
+
     if (h->available - RINGBUF_SUB(h->ridx, h->data) < size && h->filerem > 0)
         /* Data isn't ready */
         return -2;
@@ -861,6 +866,11 @@ ssize_t bufgetdata(int handle_id, size_t size, unsigned char **data)
     if (!h)
         return -1;
 
+    if (size == 0 && h->filerem > 0 &&
+        h->available - RINGBUF_SUB(h->ridx, h->data) == 0)
+        /* Data isn't ready */
+        return -2;
+
     if (h->available - RINGBUF_SUB(h->ridx, h->data) < size && h->filerem > 0)
         /* Data isn't ready */
         return -2;
-- 
2.11.4.GIT