/usr/share/doc/ruby1.8-examples/examples/pty/expect_sample.rb is in ruby1.8-examples 1.8.7.352-2ubuntu1.6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #
# sample program of expect.rb
#
# by A. Ito
#
# This program reports the latest version of ruby interpreter
# by connecting to ftp server at ruby-lang.org.
#
require 'pty'
require 'expect'
fnames = []
PTY.spawn("ftp ftp.ruby-lang.org") do |r_f,w_f,pid|
w_f.sync = true
$expect_verbose = false
if !ENV['USER'].nil?
username = ENV['USER']
elsif !ENV['LOGNAME'].nil?
username = ENV['LOGNAME']
else
username = 'guest'
end
r_f.expect(/^(Name).*: |(word):|> /) do
w_f.puts($1 ? "ftp" : $2 ? "#{username}@" : "cd pub/ruby")
end
r_f.expect("> ") do
w_f.print "dir\n"
end
r_f.expect(/[^\-]> /) do |output|
for x in output[0].split("\n")
if x =~ /(ruby.*?\.tar\.gz)/ then
fnames.push $1
end
end
end
begin
w_f.print "quit\n"
rescue
end
end
print "The latest ruby interpreter is "
print fnames.sort.pop
print "\n"
|