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Full Discussion: Backup script using Korn Flow Control
Top Forums Shell Programming and Scripting Backup script using Korn Flow Control Post 302567252 by agama on Sunday 23rd of October 2011 01:18:53 PM
Old 10-23-2011
Simple fix: add an exit 1 after the sendto command so that the script will exit at that point. You'll also want to add one at the bottom of your other else block. It also never hurts to add an exit 0 at the end of the script.

Other things....
First, when testing for equality within [[ and ]] use a double equal and not a single equal. The single equal sign will work, but it's use is discouraged as Kshell might not support it in future releases.

I am also leery that your test for remote host availability will actually work. Ping, at least on my Linux and FreeBSD hosts, will always generate output to stdout and thus your pinger variable will never be empty and thus the -z $pinger will never be true. I would suggest this change:

Code:
ping -c 1 $remote-host >/dev/null 2>&1
ping_stat=$?      # 0 for success; non-zero for failure

if (( $ping_stat == 0 )) && [[ $id_check == "root" && -d $backup_dir &&  $results == "full" ]]

This will test the success of the ping based on the return code and not the presence of any text written to stdout.
 

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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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