$FILE="/etc/mnttab";
open FILE or die "Can't open $FILE: $!";

[download]
Wow. I learn something new everyday: the one-argument form of open:
If EXPR is omitted, the global (package) scalar variable of the same name as the FILEHANDLE contains the filename.

Update: see also Single Argument Open 

        push @mnttab, ($lv, $fs)
}
%mnttab = @mnttab;

[download]
You can eliminate the array as follows: 
        $mnttab{$lv} = $fs;
}

[download]

See also:

In reply to Re: HP-UX best practices by toolic
in thread HP-UX best practices by rustic

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