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Full Discussion: Ping and repeat ?
Top Forums Shell Programming and Scripting Ping and repeat ? Post 302659383 by methyl on Wednesday 20th of June 2012 08:45:30 PM
Old 06-20-2012
I guess that what you are asking for is an "endless loop":

Code:
while true do
     ping -c 5 -t 15 www.google.com
     if [[ $? != 0 ]]; then
          date '+%Y-%m-%d %H:%M:%S Connection Unavailable' >> home/sabercats/checkconnection.log
     else
          date '+%Y-%m-%d %H:%M:%S Connection Available' /home/sabercats/checkconnection.log
     sleep 30
done

Any such "endless loop" code needs a controlled exit path. Convention is to test for a "stop" file.
 

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LEARN ABOUT DEBIAN

rds-ping

RDS-PING(1)						    BSD General Commands Manual 					       RDS-PING(1)

NAME

     rds-ping -- test reachability of remote node over RDS

SYNOPSIS

     rds-ping [-c count] [-i interval] [-I local_addr] remote_addr

DESCRIPTION

     rds-ping is used to test whether a remote node is reachable over RDS.  Its interface is designed to operate pretty much the standard ping(8)
     utility, even though the way it works is pretty different.

     rds-ping opens several RDS sockets and sends packets to port 0 on the indicated host. This is a special port number to which no socket is
     bound; instead, the kernel processes incoming packets and responds to them.

OPTIONS

     The following options are available for use on the command line:

     -c count
	     Causes rds-ping to exit after sending (and receiving) the specified number of packets.

     -I address
	     By default, rds-ping will pick the local source address for the RDS socket based on routing information for the destination address
	     (i.e. if packets to the given destination would be routed through interface ib0, then it will use the IP address of ib0 as source
	     address).	Using the -I option, you can override this choice.

     -i timeout
	     By default, rds-ping will wait for one second between sending packets. Use this option to specified a different interval. The timeout
	     value is given in seconds, and can be a floating point number. Optionally, append msec or usec to specify a timeout in milliseconds
	     or microseconds, respectively.
     Specifying a timeout considerably smaller than the packet round-trip time will produce unexpected results.

AUTHORS

     rds-ping was written by Olaf Kirch <olaf.kirch@oracle.com>.

SEE ALSO

     rds(7), rds-info(1), rds-stress(1).

BSD
								   Apr 22, 2008 							       BSD
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