FMODE_DUPLEX      243 ext/socket/socket.c     fp->mode = FMODE_READWRITE|FMODE_DUPLEX;
FMODE_DUPLEX      302 io.c               if (fptr->rbuf_len == 0 || fptr->mode & FMODE_DUPLEX)
FMODE_DUPLEX      308 io.c                       fptr->mode |= FMODE_DUPLEX;
FMODE_DUPLEX     3441 io.c           	fptr->mode &= ~FMODE_DUPLEX;
FMODE_DUPLEX     4226 io.c                   fptr->mode |= FMODE_TTY|FMODE_DUPLEX;
FMODE_DUPLEX     4689 io.c               fptr->mode = fmode | FMODE_SYNC|FMODE_DUPLEX;
FMODE_DUPLEX     4699 io.c                   write_fptr->mode = (fmode & ~FMODE_READABLE)| FMODE_SYNC|FMODE_DUPLEX;