update-rc.d.bbclass: make prerm and postrm dpkg-compatible

* prerm : only stop service at the "upgrade" and "remove" steps
* postrm : only remove symlinks at the "remove" and "purge" steps, after
  checking the init script no longer exists

diff --git a/classes/update-rc.d.bbclass b/classes/update-rc.d.bbclass
index 91af859..00ec37c 100644 (file)
--- a/classes/update-rc.d.bbclass
+++ b/classes/update-rc.d.bbclass
@@ -16,17 +16,27 @@ update-rc.d $OPT ${INITSCRIPT_NAME} ${INITSCRIPT_PARAMS}
 
 updatercd_prerm() {
 if test "x$D" = "x"; then
-       ${INIT_D_DIR}/${INITSCRIPT_NAME} stop
+       if test "$1" = "upgrade" -o "$1" = "remove"; then
+               ${INIT_D_DIR}/${INITSCRIPT_NAME} stop
+       fi
 fi
 }
 
+# Note: to be Debian compliant, we should only invoke update-rc.d remove
+# at the "purge" step, but opkg does not support it. So instead we also
+# run it at the "remove" step if the init script no longer exists.
+
 updatercd_postrm() {
 if test "x$D" != "x"; then
        OPT="-r $D"
 else
        OPT=""
 fi
-update-rc.d $OPT ${INITSCRIPT_NAME} remove
+if test "$1" = "remove" -o "$1" = "purge"; then
+       if ! test -e "${INIT_D_DIR}/${INITSCRIPT_NAME}"; then
+               update-rc.d $OPT ${INITSCRIPT_NAME} remove
+       fi
+fi
 }