Re: [aclug-L] shell script

[Jesse Kaufman <kaufmjes@xxxxxxxxxxxxxxx>]

Bob Deep wrote:

> Jesse Kaufman wrote:
> >
> > is there some sort of shell script that can do the following for me?
> >
> > 1.) run ping <arbitrary webpage> (i usually just do yahoo)
> > 2.) if it connects no problems, just exit, doing nothing...
> > 3.) if it is down send an e-mail to a predefined list of people (my
> > netadmins)
> >     with the subject line "quadnet's down AGAIN..."
> >
> > the LAN i am on is up and down all the time, and unfortunately all
> > network administers for it are not accessing inet via this LAN, so they
> > only know it's down when they manually check (this server is, of course,
> > windoze).
>
> I don't know much about send mail, but you can write a script that does
> what you want very easily...
>
> Set up a loop, that loops for ever in the scripting language of
> choice...
>
> Inside that loop you do the following...
>
> sleep for some length of time (say, 2 min or so)
>
> ping some host once "ping -c 1 "
>
> Check the return code of the ping...
> 0=Success, your network is alive
> else... Send your mail message
>
> Start the loop over...
>
> I can help you with bash, csh, ksh, perl or even C and C++ versions of
> this script if you have trouble with how to get it working..

oh, and i just want a script that i manually run...  i don't really care
about having some process running in the background checking all the time...
sometimes, it goes down for 2 secs, but is back up, and i don't want it to
send an e-mail then (although i should, so they get this LAN working
right!)...  just a manually run script would be fine with me...  tho', what
do you think would be better?

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