llmnrd: set stdout to line buffering

The log output of llmnrd works well when operated from a terminal; but not when its
stdout is piped to a log-file or -tool; due to buffering:

   By default, stdout is buffered (line buffered if connected to a
   terminal), and stderr is unbuffered. [1]

Changing stdout to line buffering fixes this.

[1] https://www.gnu.org/software/libc/manual/html_node/Buffering-Concepts.html

1 files changed, 2 insertions, 0 deletions

diff --git a/llmnrd.c b/llmnrd.c
index c9ec6b5..d076484 100644
--- a/llmnrd.c
+++ b/llmnrd.c
@@ -161,6 +161,8 @@ int main(int argc, char **argv)
 	int llmnrd_sock_rtnl = -1;
 	int nfds;
 
+	setlinebuf(stdout);
+
 	while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
 		switch (c) {
 		case 'd':