daemon: use full buffered mode for stderr

Windows doesn't support line buffered mode for file
streams, so let's just use full buffered mode with
a big buffer ("4096 should be enough for everyone")
and add explicit flushing.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/daemon.c b/daemon.c
index 40595933bea6ddc516a49f7bd5de29b3bb91db16..941c095df4530b700858afeb9a30187725dda4d3 100644 (file)
--- a/daemon.c
+++ b/daemon.c
@@ -67,12 +67,14 @@ static void logreport(int priority, const char *err, va_list params)
                syslog(priority, "%s", buf);
        } else {
                /*
-                * Since stderr is set to linebuffered mode, the
+                * Since stderr is set to buffered mode, the
                 * logging of different processes will not overlap
+                * unless they overflow the (rather big) buffers.
                 */
                fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
                vfprintf(stderr, err, params);
                fputc('\n', stderr);
+               fflush(stderr);
        }
 }
 
@@ -1117,7 +1119,7 @@ int main(int argc, char **argv)
                set_die_routine(daemon_die);
        } else
                /* avoid splitting a message in the middle */
-               setvbuf(stderr, NULL, _IOLBF, 0);
+               setvbuf(stderr, NULL, _IOFBF, 4096);
 
        if (inetd_mode && (group_name || user_name))
                die("--user and --group are incompatible with --inetd");