Document the fact that VTY locking is easily bypassable when DDB
is compiled in the kernel. Also add some useful xrefs to lock(1).
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=111633
@ -70,10 +70,14 @@ This option is implemented in a way similar to the
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.Fl S
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option of
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.Xr vidcontrol 1 ,
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and is only available if the terminal in question is a
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and thus has the same restrictions.
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It is only available if the terminal in question is a
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.Xr syscons 4
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virtual terminal.
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.El
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.Sh SEE ALSO
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.Xr vidcontrol 1 ,
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.Xr syscons 4
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.Sh HISTORY
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The
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.Nm
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@ -228,6 +228,10 @@ Turn vty switching on or off.
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When vty switching is off,
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attempts to switch to a different virtual terminal will fail.
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(The default is to permit vty switching.)
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This protection can be easily bypassed when the kernel is compiled with
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the DDB option.
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However, you probably shouldn't compile the kernel debugger on a box which
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is supposed to be physically secure.
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.It Fl s Ar number
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Set the current vty to
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.Ar number .
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