SSSD's command passkey_child was previously using stderr to
print the following messages:
PIN required.
Please touch the device.
but switched to stdout instead in the commit
6b0d175f8f
Stdout was used only for displaying the generated passkey.
This means that ipa user-add-passkey --register now must read
stdout line by line and print only the messages that the user
needs to see (all lines except the one containing the passkey).
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
b650783a18