vfat file system does not allow a space at the end of a directory name

[Chris Ward]

I had a zip file (from downloading pictures from Google Photos) where
some of the directory names had a space at the end. This unzipped fine
on an ext4 file system, but gave errors when unpacking onto a USB key
which had a FAT file system.

On further investigation, file names have the same problem. On my USB key, I get

tjcw@tjcw-OptiPlex-7010:/media/tjcw/Photos$ touch 'aab '
touch: setting times of 'aab ': No such file or directory
tjcw@tjcw-OptiPlex-7010:/media/tjcw/Photos$ echo ok >'aab '
bash: aab : Invalid argument
tjcw@tjcw-OptiPlex-7010:/media/tjcw/Photos$ touch 'aab'
tjcw@tjcw-OptiPlex-7010:/media/tjcw/Photos$ echo ok >'aab'
tjcw@tjcw-OptiPlex-7010:/media/tjcw/Photos$

Is this as expected, or is it a bug in the kernel's handling of FAT
file systems ? Probably the next step is to check the behaviour under
Microsoft Windows.

Chris Ward