O_NDELAY
#elif defined(F_SETFL) && defined(O_NDELAY)
if (fcntl(el->el_infd, F_SETFL, n|O_NDELAY) == -1)
if ((flags & (O_NONBLOCK | O_NDELAY))) {
flags & ~(O_NONBLOCK | O_NDELAY)));
#define O_NONBLOCK O_NDELAY
#define O_NONBLOCK O_NDELAY
fd = open("/usr/share/zoneinfo/right/UTC", O_RDONLY | O_NDELAY);
db = dbopen(filename, O_RDWR|O_CREAT|O_NDELAY|O_EXLOCK, 0644, DB_HASH,