All of those mechanisms break if the script is being called by a symlink, and particularly so if nested symlinks are involved. You need to readlink($0) if (-l $0) first,

Agreed.

Only FindBin correctly points you to the correct data directory location.

That's wrong. 

/var/tmp/otherdir/symdir/../datadir

[download]
is the same directory as 
/var/tmp/mydir/../datadir

[download]

so you demonstrated that working with readlinked $0 works.

even then, it won't give you the same output as FindBin::RealBin.

Doesn't matter.

FindBin is more readable, though.

What good is readable if it doesn't work as well. And I don't see how dirname($script_qn) is less readable than $FindBin::RealBin.

In reply to Re^2: What script is this, and where is it? (Re: who am I?) by ikegami
in thread who am I? by momo33

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