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 HPUX

dceping

dceping(8)																dceping(8)

NAME

       dceping - test the ability to contact DCE services from a local DCE client.

SYNOPSIS

       dceping [-n number] [-s time] [-v] [-C] [service_name ...]  required to specify the literal strings, NAMESPACE or STRING_BINDING (see nond-
       cesvc(4)).

OPTIONS

       -n number Specify the number of pinging cycles. Each service is tested once per cycle. The default is one pinging cycle.  Specifying  -n  0
		 makes pinging continuous.

       -s time	 Specify  time,  in  seconds,  to  wait between pinging cycles. You must specify more than one pinging cycle with the -n option in
		 order to use -s.

       -v	 Run in verbose mode.

       -C	 Ping only core DCE services. This option is ineffective if a service_name is specified on the command line.

DESCRIPTION

       dceping verifies that a local DCE client can communicate with DCE and other services.  It uses the RPC management interface to determine if
       the DCE service is listening.  The core DCE services that dceping checks include secd, cdsd, gdad, rpcd, cdsadv, dtsd, and sec_clientd.

       You  can  ping  other DCE and non-DCE services by naming them in the file, /opt/dcelocal/hpadmin/etc/nondcesvc. If you want to determine at
       run time what services you want dceping to ping, you may do so using the same file.  See the manpage, nondcesvc(4), for more information.

       You may specify the services to ping on the command line separated by blanks. In this case, dceping does not ping any DCE core services	or
       the  services  listed  in  /opt/dcelocal/hpadmin/etc/nondcesvc. The service_name specified could be either a name in the DCE Cell Directory
       Service Namespace or an RPC string binding. It is not

AUTHOR

       dceping was developed by HP.

FILES

       /opt/dcelocal/hpadmin/etc/nondcesvc
       /opt/dcelocal/hpadmin/etc/wellknownif

SEE ALSO

       nondcesvc(4), wellknownif(4)

HP DCE
																	dceping(8)