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Full Discussion: awk help to mask characters
Top Forums Shell Programming and Scripting awk help to mask characters Post 303025478 by RudiC on Saturday 3rd of November 2018 06:30:44 AM
Old 11-03-2018
This might work:
Code:
echo 'His phone number is (123) 456-7890 and account is 34567 887272. ' | awk '
        {while (match ($0, /[0-9()-]+ *[0-9()-]*/))     {X = substr ($0, RSTART, RLENGTH-4)
                                                         gsub (/[0-9]/, "*", X)
                                                         printf "%s%s%s", substr ($0, 1, RSTART-1), X, substr ($0, RSTART + RLENGTH - 4, 4)
                                                         $0 = substr ($0, RSTART + RLENGTH)
                                                        }
         print
        }
'
His phone number is (***) ***-7890 and account is ***** **7272.

The regex needs to be quite cumbersome as my mawk doesn't allow for back references. It will fail, too, if there are non-digits in the last four places.
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LEARN ABOUT CENTOS

tapset::string

tapset::string(3stap)													     tapset::string(3stap)

NAME

       tapset::string - systemtap string tapset

DESCRIPTION

       strlen Returns the length of a string

	      See function::strlen(3stap)
	       for details.

       substr Returns a substring

	      See function::substr(3stap)
	       for details.

       stringat
	      Returns the char at a given position in the string

	      See function::stringat(3stap)
	       for details.

       isinstr
	      Returns whether a string is a substring of another string

	      See function::isinstr(3stap)
	       for details.

       text_str
	      Escape any non-printable chars in a string

	      See function::text_str(3stap)
	       for details.

       text_strn
	      Escape any non-printable chars in a string

	      See function::text_strn(3stap)
	       for details.

       - strtol
	      Convert a string to a long

	      See function::-strtol(3stap)
	       for details.

       isdigit
	      Checks for a digit

	      See function::isdigit(3stap)
	       for details.

SEE ALSO

	 function::strlen(3stap),    function::substr(3stap),	function::stringat(3stap),  function::isinstr(3stap),  function::text_str(3stap),
       function::text_strn(3stap),  function::-(3stap),  function::strtol(3stap),  function::isdigit(3stap),  stap(1), stapprobes(3stap)

IBM
									---						     tapset::string(3stap)
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