smart script? Post: 302251623

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Top Forums Shell Programming and Scripting smart script? Post 302251623 by raidzero on Monday 27th of October 2008 02:28:13 PM

10-27-2008

Registered User

smart script?

First, I know that's a bad title. I couldn't think of anything short enough. ...

I wrote the following script to let me know when various parts of the network are down. It used to look like this before last weekend when I got over 500 emails about 1 host being down all weekend:

this is in the cron to run every 5 minutes

Code:

#script to ping nodes specified in /home/scripts/watch
#supposed to email me when one does not respond.



while read HOST ; do live=`ping -c4 "$HOST"|wc -l` ; #read IP's and ping them, count the number of lines returned (should be 9 for success, 4 for failure)


if [ $live -eq 4 ] #pretty self-explanatory
then



echo "This is an automatically generated email to let you know that "$HOST" has not responded to a scheduled ping. \n\n`date`\n\n`ping -c1 "$HOST"`\n\n`traceroute "$HOST"`" | mail -s "IPwatch "$HOST" Down!" email@address.com # send a fancy email
fi
done < /home/scripts/watch # read IPs from this file

today I tried to add some smartness to it so that if it already emailed me 5 times to stop sending them every 5 minutes and instead send every hour. I added some bogus hosts into my definition file to test everything out and so far it has not worked as expected. What have I done wrong?

Code:

while read HOST ; do live=`ping -c4 "$HOST"|wc -l` ; 


if [ $live -eq 4 ] 
then

echo "ping failed" >> /home/scripts/ipwatch/$HOST
FAIL=`cat /home/scripts/ipwatch/$HOST | wc -l`
if [ $FAIL -lt 5 ]
then
echo "This is an automatically generated email to let you know that "$HOST" has not responded to a scheduled ping. \n\n`date`\n\n`ping -c1 "$HOST"`\n\n`traceroute "$HOST"`" | mail -s "IPwatch "$HOST" Down!" email@address.com 
fi
MIN=`date | awk '{print$4}' | cut -d ":" -f2,3`
while [ "$MIN" -eq "00:00" ]
do
echo "This is an hourly reminder about $HOST not responding to ping." | mail -s "IPWatch $HOST reminder" posborn@buckheadbeef.com
done
fi
done < /home/scripts/watch

Thanks

raidzero

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tcl_allowexceptions

Tcl_AllowExceptions(3)					      Tcl Library Procedures					    Tcl_AllowExceptions(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_AllowExceptions - allow all exceptions in next script evaluation

SYNOPSIS

       #include <tcl.h>

       Tcl_AllowExceptions(interp)

ARGUMENTS

       Tcl_Interp *interp (in)		Interpreter in which script will be evaluated.
_________________________________________________________________

DESCRIPTION

       If  a  script is evaluated at top-level (i.e. no other scripts are pending evaluation when the script is invoked), and if the script termi-
       nates with a completion code other than TCL_OK, TCL_ERROR or TCL_RETURN, then Tcl normally converts this into a TCL_ERROR  return  with	an
       appropriate  message.  The particular script evaluation procedures of Tcl that act in the manner are Tcl_EvalObjEx, Tcl_EvalObjv, Tcl_Eval,
       Tcl_EvalEx, Tcl_GlobalEval, Tcl_GlobalEvalObj, Tcl_VarEval and Tcl_VarEvalVA.

       However, if Tcl_AllowExceptions is invoked immediately before calling one of those a procedures, then arbitrary completion codes  are  per-
       mitted from the script, and they are returned without modification.  This is useful in cases where the caller can deal with exceptions such
       as TCL_BREAK or TCL_CONTINUE in a meaningful way.

KEYWORDS

       continue, break, exception, interpreter

Tcl									7.4						    Tcl_AllowExceptions(3)