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Full Discussion: How to tail sed and awk in one line?
Top Forums Shell Programming and Scripting How to tail sed and awk in one line? Post 302983761 by Don Cragun on Sunday 16th of October 2016 02:35:31 PM
Old 10-16-2016
Quote:
Originally Posted by RudiC
When I look back to what has been discussed in this thread, I think the entire overall script can be condensed into one single awk line, making ban.sh unnecessary (unless it is used elsewhere as well). Please try
Code:
awk '/myword/ && !a[$1]++ {print "/sbin/iptables -A INPUT -s " $1 " -p tcp --dport 44056 -j DROP"}' /var/log/apache2/access.log | sh

and come back with the results, commented.
I was looking at this too. To get the continuous looping effect as updates are added to the log file, I think we need three processes instead of just two:
Code:
tail -f  /var/log/apache2/access.log |
  awk '/myword/ && !a[$1]++ {print "/sbin/iptables -A INPUT -s " $1 " -p tcp --dport 44056 -j DROP"}' |
  sh

If the log file rotates, you would need to either restart this script when the log rotates; or, if the tail utility on your system has an option to reopen its input file if the input file name changes, add the appropriate option(s) to make that happen.
This User Gave Thanks to Don Cragun For This Post:
baris35
 

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LEARN ABOUT OPENDARWIN

nislog

nislog(1M)						  System Administration Commands						nislog(1M)

NAME

       nislog - display the contents of the NIS+ transaction log

SYNOPSIS

       /usr/sbin/nislog [-h num | -t num]  [-v] [directory...]

DESCRIPTION

       nislog  displays  the  contents of the NIS+ server transaction log on the standard output. This command can be used to track changes in the
       namespace. The /var/nis/trans.log file contains the transaction log maintained by the NIS+ server. When updates occur, they are	logged	to
       this  file  and	then  propagated  to replicas as log transactions.  When the log is checkpointed, updates that have been propagated to the
       replicas are removed.

       The nislog command can only be run on an NIS+ server by superuser. It displays the log entries for that server only.

       If directory is not specified, the entire log is searched. Otherwise, only those logs entries that correspond to the specified  directories
       are displayed.

OPTIONS

       -h num	       Display num transactions from the ``head'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -t num	       Display	num transactions from the ``tail'' of the log. If the numeric parameter is  0, only the log header is displayed.

       -v	       Verbose mode.

FILES

       /var/nis/trans.log      transaction log

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWnisu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       nis+(1), rpc.nisd(1M), nisfiles(4), attributes(5)

NOTES

       NIS+  might  not  be  supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from NIS+ to LDAP are
       available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html.

SunOS 5.10							    12 Dec 2001 							nislog(1M)
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