Re: How-to auto-start programmes when I connect to Internet?

From: Hal Burgiss (hal_at_burgiss.net)
Date: 02/14/04

  • Next message: Dirk Wendland: "Re: [PHP] Fedora FC1 + PHP 4.3.4 + phpMyAdmin 2.5.6 rc1 - Problems Resolving Included Files" 
    To: fedora-list@redhat.com
Date: Sat, 14 Feb 2004 07:55:56 -0500

    On Fri, Feb 13, 2004 at 02:01:04PM +0000, Coume - Lubox.com wrote:
    > >
    > > Sure, write a script that checks for connection, and restarts whatever
    > > you want it to.
    >
    > Could you explain a bit more? Because I do not know how to do what
    > you told me... :(

    This is the guts of a script I have called "is_up". I call this from
    other scripts to test my connection. This script just tests local
    networking, and not necessarily connectivity with my ISP (that is
    another script, more complex to ping local gateway and nameserver).

    #!/bin/bash

    IFACE=eth0

     if ! ifconfig | grep $IFACE >/dev/null 2>&1 ||\
        ! ifconfig $IFACE | grep UP >/dev/null 2>&1; then
      #if the interface is down, then the connection surely is too!
      echo "Interface is down"
      exit 1
     fi

     echo "Interface is rockin"
     exit 0

    # end of script

    Another script might look like .... (untested!!!)

    #!/bin/sh

    services="licq named postfix blah"

    if ! is_up >/dev/null; then
      # whatever means of restarting networking
      restart_interface
    fi

    if is_up >/dev/null; then

      for i in $services; do
        service $i restart
      done
      exit 0

    else
      echo "You have failed me miserably!"
      exit 1
    fi

    # end

    ########################

    The easiest thing is to run this stuff from cron every so often. You could
    also run it within a script ...

    #!/bin/sh

     while sleep 30; do
       # this is second script above
       test_connect.sh
     done

    # will run forever
    # end
    # that is all 

    -- 
Hal Burgiss
 
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