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Truncate directory path

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# 1  
Old 01-26-2006
Truncate directory path
Is it possibe to use sed for the following? I would like to truncate the output of a directory path if it's over 3 directory levels deep. For example:
/dir1/dir2/dir3 -- NO change required
but,
/dir1/dir2/dir3/dir4 would output as ~/dir4
Thanks.
# 2  
Old 01-26-2006
sed 's/\/.*\/.*\/.*\/\(.*\)/~\/\1/g' filename

here is the output :

$echo "/dir1/dir2/dir3" | sed 's/\/.*\/.*\/.*\/\(.*\)/~\/\1/g'
/dir1/dir2/dir3

$ echo "/dir1/dir2/dir3/dir4" | sed 's/\/.*\/.*\/.*\/\(.*\)/~\/\1/g'
~/dir4
# 3  
Old 01-26-2006
Perfect ! Exactly what I was looking forward.

Thanks for the quick reply.
# 4  
Old 01-26-2006
I see some problem with that....
Ignore that one.. will post the correct one later.
# 5  
Old 01-26-2006
After playing with the script, I see the problem. I think the correction is the following:

sed 's/\/.*\(\/.*\/.*\/.*\)$/~\1/g'
Last edited by here2learn; 01-31-2006 at 10:09 AM..
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