Signal when trying to set minPasswordLength low

Instead of silently ignoring the request when a user tries to set
minPasswordLength to less than 8 characters emit a log message and
return an error to the sender.

Tested:

root@qemuarm:~# busctl set-property xyz.openbmc_project.User.Manager /xyz/openbmc_project/user xyz.openbmc_project.User.AccountPolicy MinPasswordLength y 8

root@qemuarm:~# busctl set-property xyz.openbmc_project.User.Manager /xyz/openbmc_project/user xyz.openbmc_project.User.AccountPolicy MinPasswordLength y 7
Failed to set property MinPasswordLength on interface xyz.openbmc_project.User.AccountPolicy: Invalid argument was given.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Change-Id: Ied17a46dbc9746212a7e9a4fbf1eed82fc01c3d1
1 file changed