Cool! I do something similar in user-union

Posted Apr 24, 2014 20:14 UTC (Thu) by david.a.wheeler (subscriber, #72896)
Parent article: Testing your full software stack with cwrap

Cool! LD_PRELOAD lets you do lots of interesting tricks if you need to do something "unusual" and you don't have (or want) root access. My user-union tool (http://sourceforge.net/projects/user-union/) plays somewhat similar tricks on filesystems - it lets you quietly redirect reads and writes to other locations without requiring root privileges.