[issue1279] vnconfig: unintuitive error message

[Stathis Kamperis (via DragonFly issue tracker)]

Stathis Kamperis <ekamperi at gmail.com> added the comment:

: If you forget to specify the filename, vnconfig reports a totally bogus error
: message:
: 
: # vnconfig -s labels -c vn0
: vnconfig: VNIOCATTACH: Numerical argument out of domain

If you don't specify a filename, the code assumes that you want to use a swap
backing store. And since you haven't specified a size via -S, vniocattach_swap()
returns EDOM, which corresponds to "Numerical argument out of domain".

Perhaps make vnconfig print an error:
"Either specify a regular filename or the size of a swap backing store via -S" ?

Cheers,
Stathis

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status: unread -> chatting

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