Replaced code to close() and re-open() fds.

1 files changed, 8 insertions, 6 deletions

diff --git a/mdns-repeater.c b/mdns-repeater.c
index bc00bac..abce537 100644
--- a/mdns-repeater.c
+++ b/mdns-repeater.c
@@ -231,13 +231,15 @@ static void daemonize() {
 	umask(0027);
 	chdir("/");
 
-	int i = getdtablesize();
-	while (i--)
+	// close all std fd and reopen /dev/null for them
+	int i;
+	for (i = 0; i < 3; i++) {
 		close(i);
-
-	i = open("/dev/null", O_RDWR);
-	dup(i);
-	dup(i);
+		if (open("/dev/null", O_RDWR) != i) {
+			log_message(LOG_ERR, "unable to open /dev/null for fd %d", i);
+			exit(1);
+		}
+	}
 }
 
 static void show_help(const char *progname) {