Gen random char then sed replacements Post: 302572404

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Top Forums Shell Programming and Scripting Gen random char then sed replacements Post 302572404 by agama on Thursday 10th of November 2011 12:59:30 AM

11-10-2011

Registered User

If you aren't dead set on using sed, you could try something like this:

Code:

#!/usr/bin/env ksh

awk  -v pattern="${1:-boo}" '
    function gen(       j, i, c )       # gen random replacement words
    {
        ridx = 0;
        for( i = 0; i < 500; i++ )
        {
            for( j = 0; j < word_len; j++ )
                rword[i] = rword[i] substr( soup, ((int(rand( ) *1000)) % length( soup )) + 1, 1 );
        }
    }
    BEGIN {
        soup = "abcdefghijklmnopqrstuvwxyz01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";   # xlation
        word_len = 5;       # random word size
        gen();
     }

    {
        while( sub( pattern, "<goop>" rword[ridx++], $0 ) );    # assume <goop> is not in any input data nor the pattern
            if( ridx >= 500 )
                gen();
        gsub( "<goop>", pattern "?" );
        print;
    }
' "$@"

Reads from standard input or filename(s) supplied on the command line, writes to stdout. The word size can be changed.

Test input:

Code:

Now is the time to test
Forever is the time to try the programme
now the final sentance is here the end.

Test output with the command test.ksh the <data

Code:

Now is the?LC00s time to test
Forever is the?ON2nl time to try the?5berE programme
now the?jn1BE final sentance is here the?cJod1 end.

Last edited by agama; 11-10-2011 at 02:05 AM.. Reason: typo

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LEARN ABOUT OPENSOLARIS

lptest

lptest(1B)					     SunOS/BSD Compatibility Package Commands						lptest(1B)

NAME

       lptest - generate line printer ripple pattern

SYNOPSIS

       /usr/ucb/lptest [length [count]]

DESCRIPTION

       The  lptest  utility  writes the traditional ripple test pattern to the standard output. In 96 lines, the ripple test pattern prints all 96
       printable ASCII characters in each position. The ripple test pattern was originally created to test printers.  It is also useful for  test-
       ing terminals, driving terminal ports, debugging, and performing tasks that require a quick supply of random data.

       This command is obsolete.

OPTIONS

       length	 Specifies the length of the output line in characters. 79 characters is the default.

       count	 Specifies the number of output lines. 200 lines is the default. If  count is specified, length must also be specified.

EXIT STATUS

       The following exit values are returned:

       0	   Successful completion.

       non-zero    An error occurred.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscplp 		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

SunOS 5.11							    9 Sep 1996								lptest(1B)

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