Possible ksh93 Bug Expanding Variables? Post: 303000064

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Top Forums Shell Programming and Scripting Possible ksh93 Bug Expanding Variables? Post 303000064 by Don Cragun on Tuesday 4th of July 2017 12:25:17 AM

07-04-2017

Registered User

Maybe you'd like to try the following which should work with ksh88 and any POSIX conforming shell (including ksh93):

Code:

#! /bin/ksh

typeset chLine=""
typeset chChar=""
typeset pattern='??????????'

while read -r chLine
do	print - "-- Begin Line: $chLine"
	while [ ${#chLine} -gt ${#pattern} ]
	do	pattern="$pattern$pattern"
	done
	while [ -n "$chLine" ]
	do	chChar="${chLine%$(printf '%*.*s' $((${#chLine} - 1)) \
		    $((${#chLine} - 1)) "$pattern")}"
		chLine="${chLine#?}"

		print - "\n  Line: \"$chLine\""
		print - "  Char: \"$chChar\""
	done
done < /iput/file

exit 0

If /iput/file contains:

Code:

item=value
item=val\#ue
[{(This is line 3*)}]\.

the above code should produce the output:

Code:

-- Begin Line: item=value

  Line: "tem=value"
  Char: "i"

  Line: "em=value"
  Char: "t"

  Line: "m=value"
  Char: "e"

  Line: "=value"
  Char: "m"

  Line: "value"
  Char: "="

  Line: "alue"
  Char: "v"

  Line: "lue"
  Char: "a"

  Line: "ue"
  Char: "l"

  Line: "e"
  Char: "u"

  Line: ""
  Char: "e"
-- Begin Line: item=val\#ue

  Line: "tem=val\#ue"
  Char: "i"

  Line: "em=val\#ue"
  Char: "t"

  Line: "m=val\#ue"
  Char: "e"

  Line: "=val\#ue"
  Char: "m"

  Line: "val\#ue"
  Char: "="

  Line: "al\#ue"
  Char: "v"

  Line: "l\#ue"
  Char: "a"

  Line: "\#ue"
  Char: "l"

  Line: "#ue"
  Char: "\"

  Line: "ue"
  Char: "#"

  Line: "e"
  Char: "u"

  Line: ""
  Char: "e"
-- Begin Line: [{(This is line 3*)}]\.

  Line: "{(This is line 3*)}]\."
  Char: "["

  Line: "(This is line 3*)}]\."
  Char: "{"

  Line: "This is line 3*)}]\."
  Char: "("

  Line: "his is line 3*)}]\."
  Char: "T"

  Line: "is is line 3*)}]\."
  Char: "h"

  Line: "s is line 3*)}]\."
  Char: "i"

  Line: " is line 3*)}]\."
  Char: "s"

  Line: "is line 3*)}]\."
  Char: " "

  Line: "s line 3*)}]\."
  Char: "i"

  Line: " line 3*)}]\."
  Char: "s"

  Line: "line 3*)}]\."
  Char: " "

  Line: "ine 3*)}]\."
  Char: "l"

  Line: "ne 3*)}]\."
  Char: "i"

  Line: "e 3*)}]\."
  Char: "n"

  Line: " 3*)}]\."
  Char: "e"

  Line: "3*)}]\."
  Char: " "

  Line: "*)}]\."
  Char: "3"

  Line: ")}]\."
  Char: "*"

  Line: "}]\."
  Char: ")"

  Line: "]\."
  Char: "}"

  Line: "\."
  Char: "]"

  Line: "."
  Char: "\"

  Line: ""
  Char: "."

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