Read from or write to a socket
Usage
read.socket(socket, maxlen=256, loop=FALSE)
write.socket(socket, string)
Arguments
socket
|
a socket object
|
maxlen
|
maximum length of string to read
|
loop
|
wait for ever if there is nothing to read?
|
string
|
string to write to socket
|
Description
read.socket reads a string from the specified socket,
write.socket writes to the specified socket. There is very
little error checking done by either.Value
read.socket returns the string read.Author(s)
Thomas LumleySee Also
close.socket, make.socketExamples
finger <- function(user, host = "localhost", port = 79, print = TRUE)
{
if (!is.character(user))
stop("user name must be a string")
user <- paste(user,"\r\n")
socket <- make.socket(host, port)
on.exit(close.socket(socket))
write.socket(socket, user)
output <- character(0)
repeat{
ss <- read.socket(socket)
if (ss == "") break
output <- paste(output, ss)
}
close.socket(socket)
if (print) cat(output)
invisible(output)
}
finger("root") ## only works if your site provides a finger daemon