| read.socket | R Documentation |
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.
read.socket(socket, maxlen = 256L, loop = FALSE) write.socket(socket, string)
socket |
a socket object. |
maxlen |
maximum length (in bytes) of string to read. |
loop |
wait for ever if there is nothing to read? |
string |
string to write to socket. |
read.socket returns the string read as a length-one character vector.
write.socket returns the number of bytes written.
Thomas Lumley
close.socket, make.socket
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)
}
## Not run:
finger("root") ## only works if your site provides a finger daemon
## End(Not run)
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