fcntl ===== :title: Shellcode Compiler Runtime --------------------------------------------- int fcntl(int fd, int cmd, size_t arg); --------------------------------------------- Issues a file descriptor command. The available commands vary by platform, but the most common commands, such as `F_SETFL`, are available on all platforms. Returns the result of the command, the meaning of which varies by the command sent. IMPORTANT: In the standard C runtime implementation of this function, the `arg` parameter is optional. This runtime always requires the third argument. For commands that do not need the `arg` parameter, it will be ignored. The `__undefined` intrinsic can be used for ignored parameters. See also -------- link:dup2.html[dup2], link:open.html[open], link:pipe.html[pipe], link:socket.html[socket]