logging: fix endless loop on EOF

On EOF condition we always have POLLHUP event and read returns
0 thus we never break loop in virLogHandlerDomainLogFileDrain.

Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

diff --git a/src/logging/log_handler.c b/src/logging/log_handler.c
index 6f5277c67984866d4e856c16816af276fe5cc1da..95d909b44eeac9d5e3ca37d0c025e23d2c4cc6d9 100644 (file)
--- a/src/logging/log_handler.c
+++ b/src/logging/log_handler.c
@@ -461,6 +461,8 @@ virLogHandlerDomainLogFileDrain(virLogHandlerLogFilePtr file)
             if (errno == EINTR)
                 continue;
             return;
+        } else if (len == 0) {
+            return;
         }
 
         if (virRotatingFileWriterAppend(file->file, buf, len) != len)