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* lib/parsedate.rb: documentation patch from Konrad Meyer

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<konrad.meyer@gmail.com>.  [ruby-doc:1238]

* lib/open3.rb, lib/ping.rb: ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@11113 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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matz 2006-10-09 14:49:49 +00:00
parent c51d796c7b
commit 366afb2500
4 changed files with 111 additions and 36 deletions
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49
lib/ping.rb
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@ -1,35 +1,46 @@
#
# ping.rb -- check a host for upness
# = ping.rb: Check a host for upness
#
# Author:: Yukihiro Matsumoto
# Documentation:: Konrad Meyer
#
# Performs the function of the basic network testing tool, ping.
# See: Ping.
#
require 'timeout'
require "socket"
#= SYNOPSIS
#
# Ping contains routines to test for the reachability of remote hosts.
# Currently the only routine implemented is pingecho().
#
# require 'ping'
#
# puts "'jimmy' is alive and kicking" 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 (_not_ an ICMP echo) to determine if the
# Ping.pingecho uses a TCP echo (not an ICMP echo) 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) to.
# host is available to telnet, ftp, or ssh to.
#
#= WARNING
# Warning: Ping.pingecho may block for a long time if DNS resolution is
# slow. Requiring 'resolv-replace' allows non-blocking name resolution.
#
# pingecho() may block for a long period if name resolution is slow. Require
# 'resolv-replace' to use non-blocking name resolution.
# Usage:
#
# require 'ping'
#
# puts "'jimmy' is alive and kicking" if Ping.pingecho('jimmy', 10)
#
module Ping
# return true if we can open a connection to the hostname or IP address
# +host+ on port +service+ (which defaults to the "echo" port) waiting up to
# +timeout+ seconds.
#
# Return true if we can open a connection to the hostname or IP address
# +host+ on port +service+ (which defaults to the "echo" port) waiting up
# to +timeout+ seconds.
#
# Example:
#
# require 'ping'
#
# Ping.pingecho "google.com", 10, 80
#
def pingecho(host, timeout=5, service="echo")
begin
timeout(timeout) do