/dev/wsfont permissions (Was: CVS commit: src/sys/dev/wsfont)

[Valery Ushakov <uwe%stderr.spb.ru@localhost>]

On Thu, May 12, 2022 at 23:17:42 +0000, Valeriy E. Ushakov wrote:

> Module Name:	src
> Committed By:	uwe
> Date:		Thu May 12 23:17:42 UTC 2022
> 
> Modified Files:
> 	src/sys/dev/wsfont: wsfontdev.c
> 
> Log Message:
> wsfont(4): WSDISPLAYIO_LDFONT requires device opened for writing.

/dev/wsfont used to be root:root 0600 and didn't bother to check
FWRITE in its ioctl code.  macallan@ recently added support for
listing the loaded fonts (WSDISPLAYIO_LISTFONTS, wsfontload -l).  It
would make sense to make that available to normal users - it's weird
to allow them to set the font but not list the available fonts.  But
that creates a bit of a problem if someone uses new MAKEDEV that
creates 0644 /dev/wsfont but boots an old kernel that doesn't have the
FWRITE check.

-uwe