[openwrt/openwrt] base-files: improve default root-passwd script

[LEDE Commits]

blogic pushed a commit to openwrt/openwrt.git, branch openwrt-24.10:
https://git.openwrt.org/e39f5d4b360ca3e163550592cea35949f0ea8622

commit e39f5d4b360ca3e163550592cea35949f0ea8622
Author: John Crispin <john at phrozen.org>
AuthorDate: Tue Nov 12 07:49:22 2024 +0100

    base-files: improve default root-passwd script
    
    The script was not exiting cleanly causing it to not be removed from the
    uci-defaults folder.
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 .../base-files/files/etc/uci-defaults/50-root-passwd   | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/package/base-files/files/etc/uci-defaults/50-root-passwd b/package/base-files/files/etc/uci-defaults/50-root-passwd
index 9eddf1559b..f0bb519aec 100644
--- a/package/base-files/files/etc/uci-defaults/50-root-passwd
+++ b/package/base-files/files/etc/uci-defaults/50-root-passwd
@@ -3,10 +3,16 @@
 json_init
 json_load "$(cat /etc/board.json)"
 
-json_select credentials
-	json_get_vars root_password_hash root_password_hash
-	[ -z "$root_password_hash" ] || sed -i "s|^root:[^:]*|root:$root_password_hash|g" /etc/shadow
+if json_is_a credentials object; then
+	json_select credentials
+		json_get_vars root_password_hash root_password_hash
+		if [ -n "$root_password_hash" ]; then
+			sed -i "s|^root:[^:]*|root:$root_password_hash|g" /etc/shadow
+		fi
 
-	json_get_vars root_password_plain root_password_plain
-	[ -z "$root_password_plain" ] || { (echo "$root_password_plain"; sleep 1; echo "$root_password_plain") | passwd root }
-json_select ..
+		json_get_vars root_password_plain root_password_plain
+		if [ -n "$root_password_plain" ]; then
+			(echo "$root_password_plain"; sleep 1; echo "$root_password_plain") | passwd root
+		fi
+	json_select ..
+fi