PING to one host in one background process Post: 302203982

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Top Forums UNIX for Dummies Questions & Answers PING to one host in one background process Post 302203982 by teigipo on Tuesday 10th of June 2008 10:04:03 AM

06-10-2008

Registered User

PING to one host in one background process

Hi All,
I'm doing one script on Juniper router where you have one FreeBSD Shell:
Is pinging from time to time one ethernet port of othere router and in case of fail is blocking one port entering in CLI and doing some command:
If I run this script all is working perfectly, but if I run in Backgroung using "&" is blocked on ping (ping -c1 $RemoteIPAddress) . Could you help me to solve this problem?

Many thanks
giancarlo

#!/bin/sh

# Name of Script that will be show in log file ##############################################################
ScriptName='CheckLinkScript_Ze2-NS2'
# Remote Interface IP Address ##############################################################
RemoteIPAddress="10.15.100.222"
# Local Port connected to Remote IP Address ##############################################################
LocalPort="fe-2/0/1.23"
# Variable used for show time on log file ##############################################################
RIGHT_NOW=$(date +"%x %r %Z")
# Time between ping to Remote IP Address ##############################################################
SleepingTime='3'
# When interface is down after RentryTime will be sut up and Attemp of ping will be performed ##############
RetryTime='1000'

subping ()
{
echo ---$RIGHT_NOW---$ScriptName---- PERFORMING LINK CHECK RemoteIP $RemoteIPAddress LocalPort $LocalPort -- >> /var/log/messages
ping -c1 $RemoteIPAddress
if [ $? -ne 0 ]

# when is down #################################################################################################### ##
then

echo ---$RIGHT_NOW---$ScriptName---- Remote IP address $RemoteIPAddress unreachable -- > /var/log/messages
echo ---$RIGHT_NOW---$ScriptName---- Shutting down port &LocalPort -- > /var/log/messages
cli <<END_SCRIPT
edit
set interfaces $LocalPort disable

# shut interface ####################################################################################################

commit
top
exit
exit
echo ---$RIGHT_NOW---$ScriptName---- Port &LocalPort Admin DOWN -- > /var/log/messages
END_SCRIPT

sleep $RetryTime

# after sleep try to put up interface and try again to ping ##########################################################

echo ---$RIGHT_NOW---$ScriptName---- Attempt to recover link on port &LocalPort -- > /var/log/messages
cli <<END_SCRIPT
edit
dele interfaces $LocalPort disable
commit
top
exit
exit
END_SCRIPT

# when is up #################################################################################################### #####
else
echo ---$RIGHT_NOW---$ScriptName---- LINK CHECK Performed RemoteIP $RemoteIPAddress : OK -- > /var/log/messages
fi
}

while [ true ]
do
subping

sleep $SleepingTime

done

teigipo

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LEARN ABOUT DEBIAN

bping

BPING(1)							  BP executables							  BPING(1)

NAME

       bping - Send and receive Bundle Protocol echo bundles.

SYNOPSIS

       bping [-c count] [-i interval] [-p priority] [-q wait] [-r flags] [-t ttl] srcEID destEID [reporttoEID]

DESCRIPTION

       bping sends bundles from srcEID to destEID.  If the destEID echoes the bundles back (for instance, it is a bpecho endpoint), bping will
       print the round-trip time.  When complete, bping will print statistics before exiting.  It is very similar to ping, except it works with
       the bundle protocol.

       bping terminates when one of the following happens: it receives the SIGINT signal (Ctrl+C), it receives responses to all of the bundles it
       sent, or it has sent all count of its bundles and waited wait seconds.

EXIT STATUS

       These exit statuses are taken from ping.

       0   bping has terminated normally, and received responses to all the packets it sent.

       1   bping has terminated normally, but it did not receive responses to all the packets it sent.

       2   bping has terminated due to an error.  Details should be noted in the ion.log log file.

FILES

       No configuration files are needed.

ENVIRONMENT

       No environment variables apply.

DIAGNOSTICS

       Diagnostic messages produced by bping are written to the ION log file ion.log and printed to standard error.  Diagnostic messages that
       don't cause bping to terminate indicate a failure parsing an echo response bundle.  This means that destEID isn't an echo endpoint: it's
       responding with some other bundle message of an unexpected format.

       Can't attach to BP.
	   bpadmin has not yet initialized Bundle Protocol operations.

       Can't open own endpoint.
	   Another application has already opened ownEndpointId.  Terminate that application and rerun.

       bping bundle reception failed.
	   BP system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

       No space for ZCO extent.
	   ION system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

       Can't create ZCO.
	   ION system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

       bping can't send echo bundle.
	   BP system error.  Check for earlier diagnostic messages describing the cause of the error; correct problem and rerun.

BUGS

       Report bugs to <ion-bugs@korgano.eecs.ohiou.edu>

SEE ALSO

       bpecho(1), bptrace(1), bpadmin(1), bp(3), ping(8)

perl v5.14.2							    2012-05-25								  BPING(1)