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Full Discussion: Script to change file contents line by line
Top Forums Shell Programming and Scripting Script to change file contents line by line Post 302282848 by angheloko on Monday 2nd of February 2009 03:39:00 AM
Old 02-02-2009
Hope this helps:

Code:
sed '
h
s/^.\{8\}\(.\).*/\1/
y/abcdefghijklmnopqrstuvwxyz/11111111111111111111111111/
G
s/\(.*\)\n\(.\{8\}\).\(.*$\)/\2\1\3/
h
s/^.\{13\}\(.\).*/\1/
y/abcdefghijklmnopqrstuvwxyz/44444444444444444444444444/
G
s/\(.*\)\n\(.\{13\}\).\(.*$\)/\2\1\3/' foo

Sample:
Code:
$ sed '
> h
> s/^.\{8\}\(.\).*/\1/
> y/abcdefghijklmnopqrstuvwxyz/11111111111111111111111111/
> G
> s/\(.*\)\n\(.\{8\}\).\(.*$\)/\2\1\3/
> h
> s/^.\{13\}\(.\).*/\1/
> y/abcdefghijklmnopqrstuvwxyz/44444444444444444444444444/
> G
> s/\(.*\)\n\(.\{13\}\).\(.*$\)/\2\1\3/' foo
line1 aa1a xx4x
line2 bb1b yy4y
line3 cc1c zz4z

Also, you can save this to a file:
Code:
h
s/^.\{8\}\(.\).*/\1/
y/abcdefghijklmnopqrstuvwxyz/11111111111111111111111111/
G
s/\(.*\)\n\(.\{8\}\).\(.*$\)/\2\1\3/
h
s/^.\{13\}\(.\).*/\1/
y/abcdefghijklmnopqrstuvwxyz/44444444444444444444444444/
G
s/\(.*\)\n\(.\{13\}\).\(.*$\)/\2\1\3/

And the run it by:

Code:
sed -f foo.sed foo

 

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LEARN ABOUT SUNOS

wcwidth

wcwidth(3C)						   Standard C Library Functions 					       wcwidth(3C)

NAME

       wcwidth - number of column positions of a wide-character code

SYNOPSIS

       #include <wchar.h>

       int wcwidth(wchar_t wc);

DESCRIPTION

       The  wcwidth()  function  determines the number of column positions required for the wide character wc. The value of wc must be a character
       representable as a wchar_t, and must be a wide-character code corresponding to a valid character in the current locale.

RETURN VALUES

       The wcwidth() function either returns 0 (if wc is a null wide-character code), or returns the number of column positions to be occupied	by
       the wide-character code wc, or returns -1 (if wc does not correspond to a printing wide-character code).

ERRORS

       No errors are defined.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe with exceptions	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       setlocale(3C), wcswidth(3C), attributes(5), standards(5)

SunOS 5.10							    14 Aug 2002 						       wcwidth(3C)
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