read.socket

0th

Percentile

Read from or Write to a Socket

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.

Keywords
misc
Usage
read.socket(socket, maxlen = 256L, loop = FALSE)
write.socket(socket, string)
Arguments
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.
Value

  • read.socket returns the string read as a length-one character vector.

    write.socket returns the number of bytes written.

See Also

close.socket, make.socket

Aliases
  • read.socket
  • write.socket
Examples
library(utils) finger <- function(user, host = "localhost", port = 79, print = TRUE) { if (!is.character(user)) stop("user name must be a string") user <- paste(user,"r ") 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
Documentation reproduced from package utils, version 3.3, License: Part of R 3.3

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