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Full Discussion: Searching a string in a file using perl
Top Forums Shell Programming and Scripting Searching a string in a file using perl Post 302583947 by vivek_damodaran on Wednesday 21st of December 2011 06:34:24 PM
Old 12-21-2011
Searching a string in a file using perl
Hi

I would like to read a file using perl and search for a string (last entry). Then read that into an array and do further grep

File content for ex:

comp=a,value=30,runtime=12,type=lic
comp=d,value=15,runtime=2,type=lic
comp=a,value=90,runtime=43,type=lic
comp=e,value=78,runtime=45,type=lic

I would like to read this file and find out the last occurance of "comp=e" and "type=lic"

then read that into an array, which will have

comp=a,value=90,runtime=43,type=lic

I tried using ksh (tail -1), but since the file is huge and am using lot of greps its taking time to return the results.

Tried this simple perl script....

Code:
chomp($log);
foreach $comp ("a" "b")
{
        $var1=`grep \"comp=$comp\" $log | grep \"type=lic\" | tail -1 | cut -d\",\" -f2 | cut -d\"=\" -f2`;
        $var2=`grep \"comp=$comp\" $log | grep \""type=lic"\" | tail -1 | cut -d\",\" -f3 | cut -d\"=\" -f2`;
        chomp($var1);chomp($var2);
        print ("$comp,$var1,$var2");
}


but I would like to implement this using file handlers /array. I dont want to do multiple greps in that loop...instead read output of below in a array and then do the cut

Code:
grep \"comp=$comp\" $log | grep \"type=lic\" | tail -1

Can someone help? Thanks
 

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LEARN ABOUT SUNOS

wsreg_clone_component

wsreg_clone_component(3WSREG)			    Product Install Registry Library Functions			     wsreg_clone_component(3WSREG)

NAME

       wsreg_clone_component - clone a component

SYNOPSIS

       cc [flag ...]  file ...-lwsreg [library ...]
       #include <wsreg.h>

       Wsreg_component *wsreg_clone_component(const Wsreg_component *comp);

DESCRIPTION

       The wsreg_clone_component() function clones the component specified by comp.

RETURN VALUES

       The wsreg_clone_component() returns a pointer to a component that is configured exactly the same as the component specified by comp.

USAGE

       The resulting component must be released through a call to wsreg_free_component() by the caller. See wsreg_create_component(3WSREG).

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       wsreg_create_component(3WSREG), wsreg_initialize(3WSREG), wsreg_get(3WSREG), attributes(5)

SunOS 5.10							    22 Sep 2000 				     wsreg_clone_component(3WSREG)
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