From 9ceaaa08e9b2281a5b58ac2f896761b2703d8791 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
Date: Thu, 15 Aug 2013 15:05:29 +0200
Subject: [PATCH] Fix qemuProcessReadLog with non-zero offset

This restores the error message when QMP probing is not used.

https://bugzilla.redhat.com/show_bug.cgi?id=991334
---
 src/qemu/qemu_process.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 0dccac3438..31de7591ab 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -1435,18 +1435,17 @@ qemuProcessReadLog(int fd, char *buf, int buflen, int off)
     ssize_t bytes;
     char *eol;
 
-    buf[0] = '\0';
-
     while (off < buflen - 1) {
         bytes = saferead(fd, buf + off, buflen - off - 1);
         if (bytes < 0)
             return -1;
-        else if (bytes == 0)
-            break;
 
         off += bytes;
         buf[off] = '\0';
 
+        if (bytes == 0)
+            break;
+
         /* Filter out debug messages from intermediate libvirt process */
         while ((eol = strchr(filter_next, '\n'))) {
             *eol = '\0';
-- 
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