systemctl status postfix

cond_slp[8720]: sed: can't read /etc/services: No such file or directory

"/etc/services" is hard coded in /etc/postfix/system/cond_slp
After moving /etc/services to /usr/etc/services in TW this leads to the error
given above.

Possible patch (if I correctly understood the new mimic with /usr/etc/ and
/etc/, so look in /etc/services first if file and entry exists and optionally
look in /usr/etc/services as a fallback):

--- /etc/postfix/system/cond_slp.orig
+++ /etc/postfix/system/cond_slp
@@ -23,11 +23,16 @@
 {
     local cmd=$1
     local srv
+    local services
     local FQHN=$($POSTCONF -h myhostname)
     for srv in $PSERVICES; do
-       sport=$(sed -ne "/^$srv/Is/^$srv[[:space:]]\+\([0-9]\+\)\/tcp.*/\1/gp"
/etc/services)
-       [ -n "$sport" ] || continue
-       $OPENSLP_BIN $cmd service:$srv://$FQHN:$sport > /dev/null 2>&1
+        for services in /etc/services /usr/etc/services; do
+            [ -e "$services" ] || continue
+            sport=$(sed -ne
"/^$srv/Is/^$srv[[:space:]]\+\([0-9]\+\)\/tcp.*/\1/gp" "$services")
+            [ -n "$sport" ] || continue
+            $OPENSLP_BIN $cmd service:$srv://$FQHN:$sport > /dev/null 2>&1
+            break
+        done
     done
 }


Does that make sense?