From: Sven Heinicke <sven@zen.org>
Subject: utok 1.5 - Unique TOKens
Date: Fri,  6 Mar 1998 09:20:25 GMT

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Availability

   The latest version should be available at
   http://www.catch22.com/~sven/software/utok.tar.gz
   
Description

   utok, Unique TOKens, takes a list of arguments with delimiters and
   reject all duplicate entries. Here is a example using MANPATH:
   
$ echo $MANPATH
/usr/man:/usr/local/man
$ MANPATH=`utok $HOME/local/man /usr/local/man $MANPATH /usr/openwin/man`
$ export MANPATH
$ echo $MANPATH
/home/sven/local/man:/usr/local/man:/usr/man:/usr/openwin/man

   Even though /usr/local/man was included a second time it is only in
   the MANPATH once, though it is now before the /usr/man entry instead
   of after it.
   
   This version adds the -d option to remove tokens. To remove . from the
   PATH one would do the following:
   
$ echo $PATH
/usr/local/bin:.:/usr/bin:/usr/sbin
$ PATH=`utok -d .: $PATH`
$ echo PATH
/usr/local/bin:/usr/bin:/usr/sbin
$ export PATH

Stuff Done

  Bugs Fixed Since Version 1.1
  
    1. I never check my malloc() calls. Fixed by Ken Pizzini
       <ken@halcyon.com>.
    2. Null tokens cause core dumps (i.e. typing utok :). Fixed by Ken
       Pizzini & Sven.
    5. utok a:b:c:d: will return a:b:c:d. Same bug as 2.
    6. ./utok -s '' foo bar baz foo bar returns the output of foobarbaz.
       Fixed when bug 2 was fixed.
    8. Multiple NULL arguments arn't rejected. Fixed by Ken.
   10. utok -? returning %s when it should be returning value in argv[0].
       Fixed.
       
  Features Added Since Version 1.1
  
    1. Have a way to reject elements. Added by Ken Pizzini.
    3. Make token stuff to be albe used as a shared object. Added by
       Sven.
       
- -- 
Sven Heinicke <sven@zen.org>
http://www.zen.org/~sven/



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