luci-app-rtbwmon: clean on uninstall

applications/luci-app-rtbwmon/Makefile

@@ -2,7 +2,7 @@
 
 include $(TOPDIR)/rules.mk
 
-PKG_VERSION:=1.0.0-1
+PKG_VERSION:=1.0.1-1
 PKG_RELEASE:=
 PKG_MAINTAINER:=jjm2473 <jjm2473@gmail.com>
 
@@ -10,6 +10,14 @@ LUCI_TITLE:=LuCI realtime client bandwidth monitor
 LUCI_PKGARCH:=all
 LUCI_DEPENDS:=+iptables
 
+define Package/luci-app-rtbwmon/prerm
+#!/bin/sh
+if [ -z "$${IPKG_INSTROOT}" ]; then
+    /usr/libexec/rtbwmon.sh prerm
+fi
+exit 0
+endef
+
 include $(TOPDIR)/feeds/luci/luci.mk
 
 # call BuildPackage - OpenWrt buildroot signature

applications/luci-app-rtbwmon/root/usr/libexec/rtbwmon.sh

@@ -123,16 +123,13 @@ update() {
     exec 1000>/var/run/rtbwmon.lock
     flock -n 1000 2>/dev/null || {
         flock 1000 2>/dev/null
-        [ -f /var/run/rtbwmon.csv ] && {
-            cat /var/run/rtbwmon.csv
+        [ -f /var/run/rtbwmon.csv ] && cat /var/run/rtbwmon.csv
         flock -u 1000 2>/dev/null
         return 1
     }
-    }
 
     if [ -z "$WAN_INTERFACE" ]; then
         do_clean
-        > /var/run/rtbwmon.csv
     else
         do_update "$WAN_INTERFACE" 2>/dev/null
         cat /var/run/rtbwmon.csv
@@ -162,7 +159,7 @@ run_gc() {
             break
         fi
     done
-    clean
+    [ -f /var/run/rtbwmon.csv ] && clean
     flock -u 1001
     return 0
 }
@@ -173,6 +170,17 @@ show_ifaces() {
     ip addr show scope global up | grep '^ \+inet ' | sed -n -e 's/^.* \([^ ]\+\)$/\1/p' | grep -Fv "$WAN_INTERFACE" | sort -u
 }
 
+prerm() {
+    # avoid invoke
+    chmod 644 /usr/libexec/rtbwmon.sh
+
+    exec 1000>/var/run/rtbwmon.lock
+    flock 1000
+    sleep 1 </dev/null >/dev/null 2>&1 1000>/dev/null
+    do_clean
+    flock -u 1000
+}
+
 case $1 in
 "clean")
 	clean
@@ -186,6 +194,9 @@ case $1 in
 "gc")
     run_gc
     ;;
+"prerm")
+    prerm
+    ;;
 *)
 	echo \
 		"Usage: $0 {update|clean|ifaces}