awk script modification Post: 302686705

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Top Forums Shell Programming and Scripting awk script modification Post 302686705 by SkySmart on Wednesday 15th of August 2012 10:18:06 AM

Old

08-15-2012

Registered User

Quote:

Originally Posted by elixir_sinari

Code:

awk 'FNR==NR{a[$0]=1;next}
{
for(i in a)
 if(index($0,i))
  next
}1' hostlist RS= conf

Change ORS suitably if required.

this seems to work but it removes configuration for other hosts not in the list. and what do you mean by ORS?

---------- Post updated at 10:18 AM ---------- Previous update was at 09:55 AM ----------

Quote:

Originally Posted by RudiC

This will do for your single example:

Code:

awk 'BEGIN {RS="}";ORS=RS} !/relay-nasty-02.net/ {print}' config_file

How do you transmit the list of host names? In a file, in an array, ...?

this one here seems like it could work even better.

the problem is, i have a list of host names.

what is the most efficient/fastest way to run that list against the configuration file?

i was thinking something like this but i'm sure it can be done faster in awk:

Code:

cat hostlist | while read line 

do

awk 'BEGIN {RS="}";ORS=RS} !/host_name.*${line}/ {print}' config_file

done

SkySmart

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LEARN ABOUT MOJAVE

sleep

SLEEP(1)						    BSD General Commands Manual 						  SLEEP(1)

NAME

     sleep -- suspend execution for an interval of time

SYNOPSIS

     sleep seconds

DESCRIPTION

     The sleep command suspends execution for a minimum of seconds.

     If the sleep command receives a signal, it takes the standard action.

IMPLEMENTATION NOTES

     The SIGALRM signal is not handled specially by this implementation.

     The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point).  This is a non-
     portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system.

EXIT STATUS

     The sleep utility exits 0 on success, and >0 if an error occurs.

EXAMPLES

     To schedule the execution of a command for x number seconds later (with csh(1)):

	   (sleep 1800; sh command_file >& errors)&

     This incantation would wait a half hour before running the script command_file.  (See the at(1) utility.)

     To reiteratively run a command (with the csh(1)):

	   while (1)
		   if (! -r zzz.rawdata) then
			   sleep 300
		   else
			   foreach i (`ls *.rawdata`)
				   sleep 70
				   awk -f collapse_data $i >> results
			   end
			   break
		   endif
	   end

     The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
     it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
     is created).  The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
     courteously by sleeping for 70 seconds in between each awk job.

SEE ALSO

     nanosleep(2), sleep(3)

STANDARDS

     The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

HISTORY

     A sleep command appeared in Version 4 AT&T UNIX.

BSD
								  April 18, 1994							       BSD