rootfs-postcommands.bbclass: add a note to the login banner when root-with-empty-password logins are enabled

When enabled, users will see:

===
Poky (Yocto Project Reference Distro) 5.2.99+snapshot-1dac0d15f2d979128cb449b59bf5fd69b4ba5084 qemux86-64 ttyS0

Type 'root' to login with superuser privileges (no password will be asked).

qemux86-64 login:
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(From OE-Core rev: 53631281573c7e7d8ca45dd30af990f8dd7b8e39)

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/meta/classes-recipe/rootfs-postcommands.bbclass b/meta/classes-recipe/rootfs-postcommands.bbclass
index 8b5822a0b5..d3a569ba3e 100644
--- a/meta/classes-recipe/rootfs-postcommands.bbclass
+++ b/meta/classes-recipe/rootfs-postcommands.bbclass
@@ -5,7 +5,7 @@
 #
 
 # Zap the root password if empty-root-password feature is not enabled
-ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "empty-root-password", "", "zap_empty_root_password ",d)}'
+ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "empty-root-password", "add_empty_root_password_note", "zap_empty_root_password ",d)}'
 
 # Allow dropbear/openssh to accept logins from accounts with an empty password string if allow-empty-password is enabled
 ROOTFS_POSTPROCESS_COMMAND += '${@bb.utils.contains("IMAGE_FEATURES", "allow-empty-password", "ssh_allow_empty_password ", "",d)}'
@@ -256,6 +256,13 @@ zap_empty_root_password () {
 }
 
 #
+# This function adds a note to the login banner that the system is configured for root logins without password
+#
+add_empty_root_password_note () {
+        echo "Type 'root' to login with superuser privileges (no password will be asked).\n" >> ${IMAGE_ROOTFS}/etc/issue
+}
+
+#
 # allow dropbear/openssh to accept logins from accounts with an empty password string
 #
 ssh_allow_empty_password () {