relan
Support shortname mount option like vfat
The linux vfat filesystem supports a mount option -o shortname=mode. From mount(8):
shortname=mode
Defines the behavior for creation and display of filenames
which fit into 8.3 characters. If a long name for a file
exists, it will always be the preferred one for display. There
are four modes:
lower Force the short name to lower case upon display; store a
long name when the short name is not all upper case.
win95 Force the short name to upper case upon display; store a
long name when the short name is not all upper case.
winnt Display the short name as is; store a long name when the
short name is not all lower case or all upper case.
mixed Display the short name as is; store a long name when the
short name is not all upper case. This mode is the
default since Linux 2.6.32.
It would be nice to support at least the lower option.
exFAT does not support short names by design. What problem are you trying to solve?
When I use exFAT-fuse to mount exFAT/SDXC cards from my canon cameras, I see all uppercase file names like DCIM/123_4567/IMG_1234.JPG. On FAT32/SD cards, using the vfat filesystem, (short) file names would be uppercase by default too, but the previously mentioned mount option could change that (mount -oshortname=lower ...).
I would like to mount exFAT/SDXC cards from cameras such that files show up as dcim/123_4567/img_1234.jpg (all lowercase).
In FAT there is no information about filename letters case (unless LFN feature is used). That's why vfat driver has shortname option. Note that this option does not affect LFNs.
exFAT preserves filenames case. If you see them in the upper case—they were meant to be in the upper case. I think filename case translation is out of scope of exFAT driver.
If you ultimately need lower case filenames you can create a simple FUSE filesystem that would do this translation. Just a random idea. :)
What about showexec? I find it very handy to avoid unwanted exec permissions.
https://www.mjmwired.net/kernel/Documentation/filesystems/vfat.txt#125
What about showexec?
Sounds like a good idea. Will do that for the next version.