script help

[Nick D'Angelo]

All,

I have a ping script that I want to build in a condition that it emails me if during the ping routine there are any packet losses.

Here is my script that pipes the output to a log file.

In the log file, I am not sure how to grep for anything other than 0% in the packet loss.

Thank you in advance,

!/usr/bin/ksh
#
LOG_DIR=`date +"/tmp/%d"`;export LOG_DIR
mkdir -p $LOG_DIR >/dev/null 2>&1
RETVAL=0
PATH=$PATH:/usr/sam/lbin:/usr/sam/bin:/usr/bin:/usr/sbin:/sbin;export PATH
#
echo "Subject: ping sapdev Report for "`date` >>$LOG_DIR/pingsap.$$
date >> $LOG_DIR/pingsap
ping 10.10.12.52 -n 20 >>$LOG_DIR/pingsap
#
# mail out results
#
#sendmail nickd < /tmp/pingsap.$$
rm $LOG_DIR/pingsap.$$

[someone_4]

Hi Nick,
Here is the script that I use. But I dont look for packet loss. This catches connection loss. You can modify it to email you if a host is down or fails. iphosts is a file with all the hostnames of ip addresses that you want to check in one collum. Like so:

servera
serverb
serverc

#!/bin/sh
LANG=C
HOSTNAME_FILE=iphosts
for host in $(cat $HOSTNAME_FILE)
do
ping $host -n 1 | grep -q '1 packets received'
if [ $? = 0 ]
then
echo "$host: OK"
else
echo "$host: FAIL"
fi
done

[Holger Knoppik]

Hi Nick,

try with
grep 'loss' | awk '{print $7}'
HTH

RGDS, Holger

[H.Merijn Brand (procura]

Generic grep on positive numbers using perl

l1:/u/usr/merijn 102 > for 10 12 100 13.8 0 9 0.0 120
foreach? echo "--- $i%"
foreach? echo "$i% packet loss" | perl -ne 'm/([\d.]+)\s*%/&&$1>0&&print'
foreach? end
--- 10%
10% packet loss
--- 12%
12% packet loss
--- 100%
100% packet loss
--- 13.8%
13.8% packet loss
--- 0%
--- 9%
9% packet loss
--- 0.0%
--- 120%
120% packet loss
l1:/u/usr/merijn 103 >

[S.K. Chan]

....
#
# mail out results
#
PCT=`grep \^20 $LOG_DIR/pingsap | awk -F", " '{print $3}' | awk -F"%" '{print $1}'`
if [ $PCT = 0 ]
then
:
else
sendmail nickd < /tmp/pingsap
fi
done
rm $LOG_DIR/pingsap

[S.K. Chan]

take note of the space after the "," in the first awk statement ..

[Sachin Patel · Accepted solution]

Hi Nick,
Here is what I uses

#!/bin/csh
set PING = "/etc/ping"
set COUNT = 3

set RESULT = `$PING $PLOT_SERVER -n $COUNT |grep "packet loss" | awk '{print $7}
' | sed 's/%//'`
if ($RESULT >= 100) then
echo "$PLOT_SERVER is down"
/usr/bin/mailx -s "$PLOT_SERVER is down `date`" sachin
exit
endif

Sachin

[Nick D'Angelo]

S.K.

Your script sample almost works, however, I only want to grep for % >0 on each ping which is setup to run through cron.

Your script is mailing out the top of the log file on all instances and should only be sending mail on % > 0.

Nickd

[Nick D'Angelo]

Sachin,

Thanks for your script, but it give me an error, Unmatched `.

??

[Tom Danzig]

Here's one I wrote a while ago (backup when I liked csh). It was mainly to check response time from our default gateway router.

[Tom Danzig]

Forgot to mention that the above script is written for Sun. Modify accordingly if you want to use it on HP for any reason.

Tom

[S.K. Chan]

First of all , sorry for the "done" line, it should not be there .. :)
Try this ..

#
# mail out results
#
PCT=`grep \^20 $LOG_DIR/pingsap | awk -F", " '{print $3}' | awk -F"%" '{print $1}'`
if (($PCT > 0))
then
sendmail nickd < /tmp/pingsap
else
:
fi
rm $LOG_DIR/pingsap

[Chris Richings]

Hi

Here is another snippet of using 'ping' that may be useful..

cheers

Chris


ping ${SG_SERVICE_NAME} -n 3 | grep 100% >/dev/null
if [ "$?" = 0 ]; then
echo "Unable to ping${SG_SERVICE_NAME}"
echo "SG package probably down "
exit 1
else
echo "Ping of SG successful"
fi

[Ruediger Noack]

And my suggestion to catch your recently loss value in your logfile:

LOSS=`tail -5 | fgrep loss | awk '{print $7}' | tr '%' ' '`
if [ "$LOSS" -gt 0 ]
then
# your email
fi

Ruediger

[Virginia Borraz]

You can test this. It works !


CONN=`ping XX.XX.XX.XX -n 20 |grep "packet loss" | cut -d"," -f3 | cut -d"%" -f1`
if [ $CONN != 0 ]
then
mailx ...... Connection problem
else
Succesful connection
fi

[Nick D'Angelo]

Virginia,

Your script is almost perfect for me.

I just wanted to include the last three lines of my ping for example:

--spock PING Statistics----
20 packets transmitted, 8 packets received, 60% packet loss
round-trip (ms) min/avg/max = 20/20/21
Thu Apr 25 06:57:46 EDT 2002

To the email so that these Microsoft Network "experts" NOT ;-)have the necessary information.

Thanks.