| Value | Meaning |
|---|---|
| NONE0 | Same as accept() |
| NONBLOCK0x800 | Set the O_NONBLOCK file status flag on the new open file description. Using this flag saves extra calls to fcntl(2) to achieve the same result. |
| CLOEXEC0x80000 | Set the close-on-exec (FD_CLOEXEC) flag on the new file descriptor. See the description of the O_CLOEXEC flag in open(2) for reasons why this may be useful. |
Flags that can be used with the accept4(2) operation.