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Diffstat (limited to 'lib/ping.rb')
| -rw-r--r-- | lib/ping.rb | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/lib/ping.rb b/lib/ping.rb deleted file mode 100644 index d742a50f99..0000000000 --- a/lib/ping.rb +++ /dev/null @@ -1,55 +0,0 @@ -# -# ping.rb -- check a host for upness -# -#= SYNOPSIS -# -# require 'ping' -# print "'jimmy' is alive and kicking\n" if Ping.pingecho('jimmy', 10) ; -# -#= DESCRIPTION -# -# This module contains routines to test for the reachability of remote hosts. -# Currently the only routine implemented is pingecho(). -# -# pingecho() uses a TCP echo (I<not> an ICMP one) to determine if the -# remote host is reachable. This is usually adequate to tell that a remote -# host is available to rsh(1), ftp(1), or telnet(1) onto. -# -#== Parameters -# -# : hostname -# -# The remote host to check, specified either as a hostname or as an -# IP address. -# -# : timeout -# -# The timeout in seconds. If not specified it will default to 5 seconds. -# -#= WARNING -# -# pingecho() uses user-level thread to implement the timeout, so it may block -# for long period if named does not respond for some reason. -# -#=end - -module Ping - require "socket" - def pingecho(host, timeout=5) - begin - x = Thread.current - y = Thread.start { - sleep timeout - x.raise RuntimeError if x.status - } - s = TCPsocket.new(host, "echo") - s.close - return TRUE - rescue - return FALSE; - ensure - Thread.kill y if y.status - end - end - module_function "pingecho" -end |