[PATCH] rootfs-postcommands: fix ssh_allow_empty_password checking

[Jonathan Liu <net147@gmail.com>]

The ssh_allow_empty_password function doesn't check if
sshd_config_readonly exists before running sed which can result in an
error if sshd_config exists but sshd_config_readonly doesn't.

Signed-off-by: Jonathan Liu <net147@gmail.com>
---
 meta/classes/rootfs-postcommands.bbclass | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/meta/classes/rootfs-postcommands.bbclass b/meta/classes/rootfs-postcommands.bbclass
index f5d6147..e184667 100644
--- a/meta/classes/rootfs-postcommands.bbclass
+++ b/meta/classes/rootfs-postcommands.bbclass
@@ -112,10 +112,12 @@ zap_empty_root_password () {
 # allow dropbear/openssh to accept root logins and logins from accounts with an empty password string
 #
 ssh_allow_empty_password () {
-	if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ]; then
-		sed -i 's/^[#[:space:]]*PermitRootLogin.*/PermitRootLogin yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config_readonly
-		sed -i 's/^[#[:space:]]*PermitEmptyPasswords.*/PermitEmptyPasswords yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config ${IMAGE_ROOTFS}${sysconfdir}/ssh/sshd_config_readonly
-	fi
+	for config in sshd_config sshd_config_readonly; do
+		if [ -e ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config ]; then
+			sed -i 's/^[#[:space:]]*PermitRootLogin.*/PermitRootLogin yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config
+			sed -i 's/^[#[:space:]]*PermitEmptyPasswords.*/PermitEmptyPasswords yes/' ${IMAGE_ROOTFS}${sysconfdir}/ssh/$config
+		fi
+	done
 
 	if [ -e ${IMAGE_ROOTFS}${sbindir}/dropbear ] ; then
 		if grep -q DROPBEAR_EXTRA_ARGS ${IMAGE_ROOTFS}${sysconfdir}/default/dropbear 2>/dev/null ; then
-- 
2.7.1