310 	int devnull = -1;  in main()  local
373 		devnull = open(_PATH_DEVNULL, O_RDWR);  in main()
374 		if (devnull == -1)  in main()
394 	if (!debug && rdaemon(devnull) == -1)  in main()
1639 rdaemon(int devnull)  in rdaemon()  argument
1641 	if (devnull == -1) {  in rdaemon()
1645 	if (fcntl(devnull, F_GETFL) == -1)  in rdaemon()
1660 	(void)dup2(devnull, STDIN_FILENO);  in rdaemon()
1661 	(void)dup2(devnull, STDOUT_FILENO);  in rdaemon()
1662 	(void)dup2(devnull, STDERR_FILENO);  in rdaemon()
1663 	if (devnull > 2)  in rdaemon()
1664 		(void)close(devnull);  in rdaemon()