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Top Forums Shell Programming and Scripting Perform an action if certain text exist in output (PERL) Post 302777323 by spartan22 on Thursday 7th of March 2013 03:59:34 PM
Old 03-07-2013
Perform an action if certain text exist in output (PERL)

Hello,

I'm attempting to write a tool that checks an IP address for existing PTR records then if there are no PTR records does a ping to see if it response.

Then if there is no response, it should print a message saying

This is what I have so far.

Code:
#!/usr/bin/perl
$nxdomain = "NXDOMAIN";
$ping = "100%";
while (defined($line = <>)) {
	chomp($line);
		print `nslookup $line`;
			if ($nxdomain) {
		print `ping -c 1 -w 2.0 $line`; }
			if ($ping) {
		print "IP Address '$line' is available.\n";
			}
	}

What I can't seem to get to work are the if statements for if the text NXDOMAIN is in the output and if 100% is in the output. It just goes ahead with the nslookup and then goes ahead with the ping.

Any suggestions?
Thanks!
 

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MACPING(1)						      General Commands Manual							MACPING(1)

NAME
macping - A tool for pinging other RouterOS or mactelnetd devices SYNOPSIS
mactelnet [options] <MAC-Address|hostname> DESCRIPTION
This tool enables you to ping other RouterOS or MAC-Telnetd enabled devices. You can ping either a hostname or a MAC address. If speci- fied, the hostname (identity) will be looked up via MNDP discovery. OPTIONS
These programs follow the usual GNU command line syntax. A summary of options is included below. -f Fast mode, do not wait before sending next ping request. The next ping will be sent immediately when the last ping is received. This cannot be used with -c 0 -s Specify the amount of bytes to send in each ping packet, up to ~1400 bytes. -c Number of packets to send before exiting. A value of 0 means unlimited packets and the tool must be exited with Control + C. -h Show summary of options. -v Show version of program. SEE ALSO
mndp(1), mactelnet(1), mactelnetd(1). AUTHOR
macping was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>. This manual page was written by Hakon Nessjoen <haakon.nessjoen@gmail.com>, for the Debian project (and may be used by others). February 27, 2011 MACPING(1)
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