pattern for matching a filepath

Can you please tell me the grep pattern for matching the following filepath:

../any_directoryname/filename.txt

I only know the filename. The any_directoryname keeps on changing.

Thanks in advance,

Regards

John

Try this:

\.\./[^/]+/filename.txt

This assumes only one directory. If it can be more than that, try

\.\./[^\r\n]+/filename.txt 

If you know the filename and want to extract the path from the string, use

str_replace('/filename.txt', '', $full_path);

A regex is not reliable if both file and path vary (you can only find out if something is a file or directory using filesystem commands, name checking is not going to tell you that), and if one of the two doesn't vary, you don't need a regex at all.

try this regex

^\.\.\/[\w]+\/[\w\.]+$

How about...

(A Perl answer...)

For a given path/filename in the form of:

$fullPath = /dir/dir/dir/filename

($path, $file) = $fullPath =~ m/(^\/.*\/)(\S+$)/;

That puts

$path = /dir/dir/dir/...
$file = filename