socketSelect: Wait on Socket Connections
In robertzk/monadicbase: The R Base Package

Description Usage Arguments Details Value Examples

Waits for the first of several socket connections to become available.

1	socketSelect(socklist, write = FALSE, timeout = NULL)

`socklist`	list of open socket connections
`write`	logical. If `TRUE` wait for corresponding socket to become available for writing; otherwise wait for it to become available for reading.
`timeout`	numeric or `NULL`. Time in seconds to wait for a socket to become available; `NULL` means wait indefinitely.

The values in write are recycled if necessary to make up a logical vector the same length as socklist. Socket connections can appear more than once in socklist; this can be useful if you want to determine whether a socket is available for reading or writing.

Logical the same length as socklist indicating whether the corresponding socket connection is available for output or input, depending on the corresponding value of write.

## Not run: 
## test whether socket connection s is available for writing or reading
socketSelect(list(s, s), c(TRUE, FALSE), timeout = 0)

## End(Not run)