Default working directory for FRCUserProgram process?

[lalondma]

Hello,
Recently, I got a program crash because the text file that was supposed to be loaded by AutomonousInit (C++ - iterative robot) could not be found. The file was placed in /home/lvuser alongside the binary FRCUserProgram, so I expected a call like fopen("foo.txt","r") to work but it didn't. fopen("/home/lvuser/foo.txt","r") did work however, so it's not a permission issue. Also tried to put the file in "/home/admin" in case FRCUserProgram would run as admin, without success. Anybody knows what the default working directory is? "/", maybe?