https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205797
Bug ID: 205797
Summary: Feature: Keyboard map item for backspace key that
obeys DECBKM
Product: Base System
Version: 11.0-CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: misc
Assignee: [email protected]
Reporter: [email protected]
In an actual DEC VT52x terminal the operation of the <[X] (a.k.a. [Backspace])
key is controlled by a DEC private mode setting, DECBKM. This setting allows
applications to control whether the key sends the DEL or the BS character.
(It's also reachable via the menu on the terminal's local user interface.)
Neither the vt nor the syscons subsystems implement that. So all vt and
syscons keyboard maps explicitly state either "bs" or "del" for that key.
The nosh toolset's virtual terminal subsystem does implement DECBKM, however.
So it requires an extension to the kbdmap(5) format. It employs this extension
in an overlay keyboard map supplied in the toolset, soft_backspace.kbd, that is
applied on top of the system-supplied ones during keyboard map import.
That extension is "bspace", defined as causing the emission of BS or DEL
according to the current value of the DECBKM setting.
Please don't use this name in the vt or syscons systems, unless you're
extending them likewise. Thank you.
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