Remove setvbuf(<handle>, NULL, _IOLBF, 0) calls for Win32

On Win32 the setvbuf function requires the last parameter to be size between 2 and INT_MAX bytes, so the calls always failed. Since the whole point of the calls is to set line-buffered mode for the file handle and that's not supported on Win32 anyway, conditionally remove them.

Signed-off-by: Filip Navara <filip.navara@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/exec.c b/exec.c
index 7d3eb1adab..ef79d6d29e 100644
--- a/exec.c
+++ b/exec.c
@@ -1491,7 +1491,8 @@ void cpu_set_log(int log_flags)
             static char logfile_buf[4096];
             setvbuf(logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
         }
-#else
+#elif !defined(_WIN32)
+        /* Win32 doesn't support line-buffering and requires size >= 2 */
         setvbuf(logfile, NULL, _IOLBF, 0);
 #endif
         log_append = 1;