Taking a name out of $PATH

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# 8  
Old 01-28-2008
Originally Posted by robsonde
I dident think of that........
could you show better code for my education?
Actually, my example above isn't the case - the leading / will protect it from matching the a in local. But it could break another way easily enough.

It's a matter of restricting the change to the right bit of the path...
Depending on what the OP actually wants, you could isolate each path element:
while [ -n "$elements" ]
    element=`echo $elements | cut -d ':' -f 1`
    elements=`echo $elements | cut -d ':' -f 2-`
    candidate=`basename $element`
    if grep -E "^${candidate}:" /etc/passwd > /dev/null
      #it's a username
     element=`dirname $element`
    if [ -z "$result" ]
echo $result

PATH=`scriptname.sh` ; export PATH
(untested so expect the odd bug)

But that's probably not required as a more careful pattern match is likely to be sufficient (again, this would depend on the O/Ps intent)
Something like:
PATH=`echo $PATH | sed 's/\/USERNAME[\:$]//g'`

My sed's not the best but you get the picture.
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