How to keep from duplicating path variable in ksh

Question

PATH=${SOMETHING}:${PATH}

How do I remove duplicates from PATH.

score 3 · Accepted Answer · answered Feb 25 '09 at 16:28

3

I use this oneliner, but it depends on gawk.

PATH=$(echo $PATH|tr ":" "\n"|gawk '!($0 in a) { a[$0];print}'|paste -sd: - )

answered Feb 25 '09 at 16:28

Sanjaya R

fwiw, the above works fine on OpenBSD with good old 'awk' instead of 'gawk' – dwc Feb 25 '09 at 16:35

1 Answers1