How to get rid of bad chrs?

[Liam Proven]

On Tue, 3 Aug 2021 at 06:16, rikona <rikona at sonic.net> wrote:
>
> It may depend on how the pix were obtained from the phone/comp. I've
> been using a direct USB connection for ages, and I guess it just copies
> all. Several pgms now offer to connect to the camera/phone and get pix,
> and they may only transfer the non-hidden files.
>
> A direct copy gives something like:
> IMG_E6064.JPG but also has
> .IMG_E6064.JPG
> It's not hard to get rid of the . files, and I've done that, but if I'm
> getting 5000 pix from some phone, with several dirs, it's a PITA.

Prefixing a filename with a dot hides it on traditional xNix filesystems.

Mac OS X is a UNIX™, certified by the Open Group.

It creates a hidden dotfile  for every visible file. This is where it
stores metadata about the file -- what app created it, what app(s) can
edit it, and so on. Traditional xNix has no way of storing this info;
it does not track it, but the rich Mac desktop does.

On Classic MacOS the filesystem kept very rich metadata because the
Classic MacOS uses no config files _at all_ anywhere. Not a single
one. It's _all_ in the metadata. For this, the HFS and later HFS+
filesystems have 2 "forks" for every file: one contains the file's
traditional contents as seen by other OSes, and the other contains its
metadata, including what computer it was created on, its Creator and
Editor application lists, its icons at various sizes, and much more.

There's no space for this in other OSes' filesystems. NTFS can handle
it by saving the resource fork in an NTFS Stream, but only if the file
was saved on an NT server by a Mac connected over the AppleShare
protocol.

FAT can't do it at all, not can extX, XFS, Btrfs, etc.

So, Mac OS X -- a UNIX which ran Classic MacOS apps and which boots on
Macs from a Classic MacOS filesystem -- makes these hidden files to
keep the data that on those apps' original native OS was in the
resource fork.

On other OSes you can remove them but if you then read the file on a
Mac again, it will have "forgotten" a bunch of info about the file.

This is normal standard behaviour for OS X and has been for 21 years or so now.

I know Ralf uses an iPad; iPads and iPhones also run a derivative of
Mac OS X but without the desktop shell. I therefore would think they
create the same metadata hidden files.

-- 
Liam Proven – Profile: https://about.me/liamproven
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