use authselect to change nsswitch.conf if available

nss-mdns.spec

@@ -39,22 +39,49 @@ rm -rf $RPM_BUILD_ROOT
 
 %post
 %{?ldconfig}
+
+function mod_nss() {
+    if [ -f "$1" ] ; then 
         # sed-fu to add mdns4_minimal to the hosts line of /etc/nsswitch.conf
-if [ -f /etc/nsswitch.conf ] ; then
 	    sed -i.bak '
 		    /^hosts:/ !b
     		/\<mdns\(4\|6\)\?\(_minimal\)\?\>/ b
     		s/\([[:blank:]]\+\)dns\>/\1mdns4_minimal [NOTFOUND=return] dns/g
-		' /etc/nsswitch.conf
+    		' "$1"
+    fi
+}
+
+FILE="$(readlink /etc/nsswitch.conf || echo /etc/nsswitch.conf)"
+if [ "$FILE" = "/etc/authselect/nsswitch.conf" ] && authselect check &>/dev/null; then 
+    mod_nss "/etc/authselect/user-nsswitch.conf"
+    authselect apply-changes &> /dev/null || : 
+else
+    mod_nss "$FILE"
+    # also apply the same changes to user-nsswitch.conf to affect
+    # possible future authselect configuration
+    mod_nss "/etc/authselect/user-nsswitch.conf"
 fi
 
 %preun
+function mod_nss() {
+    if [ -f "$1" ] ; then 
         # sed-fu to remove mdns4_minimal from the hosts line of /etc/nsswitch.conf
-if [ "$1" -eq 0 -a -f /etc/nsswitch.conf ] ; then
     	sed -i.bak '
 	    	/^hosts:/ !b
 		    s/[[:blank:]]\+mdns\(4\|6\)\?\(_minimal\( \[NOTFOUND=return\]\)\?\)\?//g
-	' /etc/nsswitch.conf
+    		' "$1"
+    fi
+}
+
+FILE="$(readlink /etc/nsswitch.conf || echo /etc/nsswitch.conf)"
+if [ "$FILE" = "/etc/authselect/nsswitch.conf" ] && authselect check &>/dev/null; then 
+    mod_nss "/etc/authselect/user-nsswitch.conf"
+    authselect apply-changes &> /dev/null || : 
+else
+    mod_nss "$FILE"
+    # also apply the same changes to user-nsswitch.conf to affect
+    # possible future authselect configuration
+    mod_nss "/etc/authselect/user-nsswitch.conf"
 fi
 
 %ldconfig_postun