> But from the manual page:
> 
> -f file
>      Filename to use for the vnode type memory disk. Options -a
>      and -t vnode are implied if not specified.
> 
> So if you specify -f then you get -t vnode automatically.

Ah yes.  Reading src/sbin/mdconfig/mdconfig.c with your "mdconfig
-a -f mfsroot" it seems the manual correctly represents the code
... except I'm lost what the purpose of cmdline is ?

( BTW I was wrong re:
> I suspect -t default is malloc, though manual doesnt say that
'f' actually follows with: mdio.md_type = MD_VNODE; )


Could author p...@freebsd.org cc'd (or someone else if they are clear)
please explain what cmdline is ? 
Possibly commit an appended // comment after "int cmdline = 0;" 
(in line 76 of 8.1 & current src/sbin/mdconfig/mdconfig.c) wgat it's for ?

        (cmdline seems in most places to maybe be an enum { 1
        2 3 } for { a d l } alternate forms of command mdconfig,
        ... & yet case 'd': sets cmdline = 3 not 2 ?
        (& 't' & 'f' sets cmdline=2 ; not 1.    Puzzling.

Cheers,
Julian
-- 
Julian Stacey, BSD Unix Linux C Sys Eng Consultants Munich http://berklix.com
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