Request

Index Word Description
0 Header code [0x00140084]
1 nfds_t nfds
2 int timeout
3 Value 0x20 (processID header)
4 ProcessID set by the ARM11 kernel.
5 (insize<<14) | 0x2802
6 Pointer to input pollfd struct array

The following is located 0x100-bytes after the beginning of the above command buffer:

Index Word Description
0 (outsize<<14) | 2
1 Pointer to output pollfd struct array

Response

Index Word Description
0 Header code
1 Result code
2 POSIX return value

pollfd struct

Type Name Description
u32 fd Socket handle
u32 events Events to poll for (input)
u32 revents Events received (output)

Events

Events are a bitwise set of these flags.

Value Name Input/Output Description
0x01 POLLIN Both Can recv() data from socket without blocking. For listen sockets, this means you can accept() a connection without blocking.
0x02 POLLPRI Both There is OOB data ready to recv(). Appears that recv()'ing without OOB flag still reads OOB data?
0x04 ??? ??? Have never seen this flag. Could possibly be POLLHUP (need to test).
0x08 POLLERR Out Socket has an error condition.
0x10 POLLOUT Both Can send() data to socket without blocking. For a non-blocking connect(), this means the connection has completed (need to test).
0x20 POLLNVAL Out Invalid socket handle. This is set if you use fd=-1, which is non-standard behavior.
??? POLLHUP Out Socket has been disconnected.