Corion's solution is quite nice, but I worry about safety of such an approach. Open solutions an pipelines ar eusually safety hazards (This is my personal opinion!!!)

Let's see if we can't sway your opinion. Please provide a specific example of a situation where one process writing to a file and another tailling it (just as in Corion's post) could lead to anything hazardous. Describe the specific hazard as you see it. Thanks.