The attached program for manually locking the CD-ROM tray used to work 
in 2.6.0 and 2.6.1, and possibly some earlier versions of 2.6.2 when 
called like "cd-lock /dev/hdc", where hdc is my CD-ROM drive. However, 
under 2.6.2-rc1-mm2 and 2.6.2-mm1, calling the program with an empty 
drive (which used to work) results in the following:

open failed: No medium found

Has anything changed recently which would cause open() to fail with an 
empty CD drive? Just for good measure, I've attached the output of 
strace when running this program.