(fcntl raw cmd)
(fcntl raw cmd arg)

(fd-getfl raw)

(fd-setfl raw xflags)

(fd-setfl! raw flags)

(fd-getfd raw)

(fd-setfd raw xflags)

(fd-setfd! raw flags)

(fd-set-closeonexec raw)

(fd-set-nonblock raw)

(fd-set-nonblock/closeonexec raw)

O_ACCMODE
O_APPEND
O_CLOEXEC
O_CREAT
O_DIRECT
O_DSYNC
O_EXCL
O_NOATIME
O_NOCTTY
O_NOFOLLOW
O_NONBLOCK
O_RDONLY
O_RDWR
O_SYNC
O_TMPFILE
O_TRUNC
O_WRONLY

F_GETFL
F_SETFL
F_GETFD
F_SETFD
F_DUPFD

FD_CLOEXEC