For the same reason I am currently mounting usbfs using the options : -onodev,noexec,nosuid,devmode=664,devgid=46,busgid=46,listgid=46,busmode=0770,listmode=0660
The group with gid 46 is plugdev , which sort of fits this permission policy. I guess having this configurable through something like /etc/default/tmpfs for example /etc/default/usbfs and sourcing that file at the beginning of the script. Would you be interested in a patch towards that end ?
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