[openwrt/openwrt] umdns: add /etc/umdns/ to mount namespace jail

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/330d67ecc0121bc83f1b1a616e92aacd4760b499

commit 330d67ecc0121bc83f1b1a616e92aacd4760b499
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Wed Mar 20 19:22:46 2024 +0000

    umdns: add /etc/umdns/ to mount namespace jail
    
    Make sure /etc/umdns/ is accessiable for the umdns process if it
    exists and umdns is run with umdns. at umdns[0].jail='1'.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 package/network/services/umdns/files/umdns.init | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/package/network/services/umdns/files/umdns.init b/package/network/services/umdns/files/umdns.init
index 7f25595f24..e9a2c05e09 100644
--- a/package/network/services/umdns/files/umdns.init
+++ b/package/network/services/umdns/files/umdns.init
@@ -42,7 +42,10 @@ start_service() {
 	done
 	procd_add_raw_trigger "instance.update" 5000 "/bin/ubus" "call" "umdns" "reload"
 	procd_close_trigger
-	[ "$(uci -q get umdns. at umdns[-1].jail)" = 1 ] && procd_add_jail umdns ubus log
+	[ "$(uci get umdns. at umdns[-1].jail)" = 1 ] && {
+		procd_add_jail umdns ubus log
+		[ -d /etc/umdns ] && procd_add_jail_mount "/etc/umdns"
+	}
 	procd_close_instance
 }