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Full Discussion: Grep from multiple files by column name
Top Forums UNIX for Dummies Questions & Answers Grep from multiple files by column name Post 302784075 by rbatte1 on Thursday 21st of March 2013 11:43:44 AM
Old 03-21-2013
You might need a two step process in a loop then. Are the various files each the same format each time? If so, then you can build a case statement to collect it all together into one:-
Code:
#!/bin/ksh

for file in <list of files>
do
   case $file in
      file1)   cols="-2"    ;;
      file2)   cols="1,4"  ;;
      file3)   cols="3,6"   ;;
      *)       cols="1-"    ;;
   esac

   cut -f$cols -d " " $file
done

Obviously adjust the file names and columns required to suit your needs.

The wild-card option at the end of the case statement just completes the syntax to that cut will get fields from the first to the end, i.e. everything.

You can add a | grep after the done statement to select the rows you want, in this example above you would end up with:-
Code:
::
::
::
   esac

   cut -f$cols -d " " $file
done | grep "^2 "


Does this help?


Robin
 

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LEARN ABOUT SUNOS

set_menu_format

menu_format(3CURSES)					     Curses Library Functions					      menu_format(3CURSES)

NAME

       menu_format, set_menu_format - set and get maximum numbers of rows and columns in menus

SYNOPSIS

       cc [ flag... ] file... -lmenu -lcurses [ library... ]
       #include <menu.h>

       int set_menu_format(MENU *menu, int rows, int cols);

       void menu_format(MENU *menu, int *rows, int *cols);

DESCRIPTION

       set_menu_format()  sets	the  maximum number of rows and columns of items that may be displayed at one time on a menu. If the menu contains
       more items than can be displayed at once, the menu will be scrollable.

       menu_format() returns the maximum number of rows and columns that may be displayed at one time on menu. rows and cols are pointers  to  the
       variables used to return these values.

RETURN VALUES

       set_menu_format() returns one of the following:

       E_OK		       The routine returned successfully.

       E_SYSTEM_ERROR	       System error.

       E_BAD_ARGUMENT	       An incorrect argument was passed to the routine.

       E_POSTED 	       The menu is already posted.

ATTRIBUTES

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

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

SEE ALSO

       curses(3CURSES), menus(3CURSES), attributes(5)

NOTES

       The header <menu.h> automatically includes the headers  <eti.h> and <curses.h>.

SunOS 5.10							    31 Dec 1996 					      menu_format(3CURSES)
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