rootfs-postcommands.bbclass: Only set DROPBEAR_RSAKEY_DIR once

If DROPBEAR_RSAKEY_DIR has already been set before, e.g. by overwriting
the file dropbear.default, the line will still be appended a second time.

DROPBEAR_RSAKEY_DIR="/path/to/dropbear"
DROPBEAR_EXTRA_ARGS="-B"
DROPBEAR_RSAKEY_DIR=/var/lib/dropbear

(From OE-Core rev: 943c6acf855fd9de592f0b77828242c2c6e0869f)

Signed-off-by: Michael Glembotzki <Michael.Glembotzki@iris-sensing.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/meta/classes-recipe/rootfs-postcommands.bbclass b/meta/classes-recipe/rootfs-postcommands.bbclass
index e81b69a239..920da94ba2 100644
--- a/meta/classes-recipe/rootfs-postcommands.bbclass
+++ b/meta/classes-recipe/rootfs-postcommands.bbclass
@@ -206,7 +206,9 @@ read_only_rootfs_hook () {
                 # Also tweak the key location for dropbear in the same way.
                 if [ -d ${IMAGE_ROOTFS}/etc/dropbear ]; then
                         if [ ! -e ${IMAGE_ROOTFS}/etc/dropbear/dropbear_rsa_host_key ]; then
-                                echo "DROPBEAR_RSAKEY_DIR=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
+                                if ! grep -q "^DROPBEAR_RSAKEY_DIR=" ${IMAGE_ROOTFS}/etc/default/dropbear ; then
+                                        echo "DROPBEAR_RSAKEY_DIR=/var/lib/dropbear" >> ${IMAGE_ROOTFS}/etc/default/dropbear
+                                fi
                         fi
                 fi
         fi