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Full Discussion: read space filled file and replace text at specific position
Top Forums Shell Programming and Scripting read space filled file and replace text at specific position Post 302187228 by era on Sunday 20th of April 2008 09:31:51 AM
Old 04-20-2008
Can you try with another version of awk? Do you have nawk, or mawk, or gawk?

Or try Perl:

Code:
perl -pe 'if (substr($_,16,3) eq "RT3" && substr($_,2560,18) =~ /^\d+ *$/) {
  substr($_, 2560, 18) = sprintf("%-18i", $ENV{"chrg"});
}' file

... assuming chrg is an integer. Or simply use the %-18.18s format suggested by aigles.

If this doesn't work for you, either, maybe you could attach a small sample file to test with. The sample you posted only has spaces at position 2651 in the version I copy+pasted from here. The number 478951 is at position 2690 in my copy. (In Perl, these numbers are one less, because substr counts offsets from zero, not positions.)
 

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LEARN ABOUT ULTRIX

mvwdelch

delch(3cur)															       delch(3cur)

Name
       delch, mvdelch, mvwdelch, wdelch - remove character from window

Syntax
       #include <cursesX.h>

       int delch()

       int wdelch(win)
       WINDOW *win;

       int mvdelch(y, x)
       int y, x;

       int mvwdelch(win, y, x)
       WINDOW *win;
       int y, x;

Description
       The  routine  deletes  the character under the cursor in the default window.  All characters to the right on the same line are moved to the
       left one position and the last character on the line is filled with a blank.  The cursor position does not change.

       The routine deletes the character under the cursor in the specified window.  All characters to the right on the same line are moved to  the
       left one position and the last character on the line is filled with a blank.  The cursor position does not change.

       The  routine moves the cursor to the specified position in the default window.  The character found at this location is deleted.  All char-
       acters to the right on the same line are moved to the left one position and the last character on the line is filled  with  a  blank.   The
       cursor position does not change.

       The  routine  moves  the  cursor  to the specified position in the specified window.  The character found at this location is deleted.  All
       characters to the right on the same line are moved to the left one position and the last character on the line is filled with a blank.  The
       cursor position does not change.

       The routines and are macros.

Return Values
       The and functions return OK on success and ERR on error.

																       delch(3cur)
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