On most Linux filesystems, NUL (\0) is the only invalid character in paths (and / is reserved as the path separator). Windows has a complicated set of rules for valid paths. Rather than fixing paths automagically (dangerous, could result in a file overwriting another), how can I find all paths within a directory not compatible with Windows?
The original issue was that my Google Drive folder was on a drive mounted using ext2fs, but the official Gdrive client told me thousands of files could not be synced. I could find no error messages, and when I asked it to show me the files it would simply hang indefinitely. Restarting the client or OS did not help, but I had a hunch fixing any non-Windows-compatible paths would unstick Gdrive. It seems to have worked...
