1.1 Install updates

lib/utils.sh

@@ -16,3 +16,38 @@ is_installed()
 }
 
 
+# contains helper functions to work with apt
+
+apt_update_if_needed() 
+{
+    if [ -e /var/cache/apt/pkgcache.bin ]
+    then
+        UPDATE_AGE=$(( $(date +%s) - $(stat -c '%Y'  /var/cache/apt/pkgcache.bin)  ))
+
+        if [ $UPDATE_AGE -gt 21600 ]
+        then
+            # update too old, refresh database
+            apt-get update -y >/dev/null 2>/dev/null
+        fi
+    else
+        apt-get update -y >/dev/null 2>/dev/null
+    fi
+}
+
+apt_check_updates()
+{
+    local NAME="$1"
+    local DETAILS="/dev/shm/${NAME}"
+    LANGUAGE=C apt-get upgrade -s 2>/dev/null | grep -E "^Inst" > $DETAILS || : 
+    local COUNT=$(wc -l < "$DETAILS")
+    FNRET=128 # Unknown function return result
+    RESULT="" # Result output for upgrade
+    if [ $COUNT -gt 0 ]; then
+        RESULT="There is $COUNT updates available :\n$(cat $DETAILS)"
+        FNRET=1
+    else
+        RESULT="OK, no updates available"
+        FNRET=0
+    fi
+    rm $DETAILS
+}