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Full Discussion: Bash Scipting (New); Run multiple greps > multiple files
Top Forums Shell Programming and Scripting Bash Scipting (New); Run multiple greps > multiple files Post 302753389 by LDHB2012 on Tuesday 8th of January 2013 04:57:03 PM
Old 01-08-2013
Quote:
Originally Posted by Scrutinizer
Hi, first, try these modifications to that code:
Code:
awk 'NR==FNR{A[$1]; next} { for(i in A) if($0~i){f=i ".txt"; print>>f; close(f) }}' infile "$file"


With this one, that I already mentioned had worked. Is there a reason why it would take a pretty large amount of time to complete the script, while creating just one file for one search string is done in 2 seconds.

Is there a more effecient way of writing the code to make it faster? Is there another way to write this code, in order to find errors easier, where I can print "something" when there's an error?

---------- Post updated at 04:57 PM ---------- Previous update was at 01:49 PM ----------

Quote:
Originally Posted by Scrutinizer
Try:
Code:
awk 'NR==FNR{A[$1]; next} { for(i in A) if($0~i){f=i ".txt"; print>>f; close(f); next }}1'  infile "$file" > file.other

Good Afternoon Scrutinizer,

I'm testing this code and there's something very funny about it. First off, the things that are being searched have a file created IMMEDIATELY, but not yet finished being searched until 30 minutes. To manually grep these strings out of the whole directory, it takes less than 2 seconds.

The results between manual search and script finishing are different. Also, the scripts returns different results when ran once, deleted and then ran again. None of the data changed, only the output files have discrepancies. I'm not sure why this would be...

-David
 

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LEARN ABOUT SUNOS

getusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

       /bin/bash		  /bin/csh
       /bin/jsh 		  /bin/ksh
       /bin/pfcsh		  /bin/pfksh
       /bin/pfsh		  /bin/sh
       /bin/tcsh		  /bin/zsh
       /sbin/jsh		  /sbin/pfsh
       /sbin/sh 		  /usr/bin/bash
       /usr/bin/csh		  /usr/bin/jsh
       /usr/bin/ksh		  /usr/bin/pfcsh
       /usr/bin/pfksh		  /usr/bin/pfsh
       /usr/bin/sh		  /usr/bin/tcsh
       /usr/bin/zsh		  /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

SunOS 5.10							    30 Aug 2004 						  getusershell(3C)
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