1.fs-qnx6.so
http://www.qnx.com/developers/docs/6.4.1/neutrino/utilities/f/fs-qnx6.so.html
2.QNX6 fielsystem in user guide
http://www.qnx.com/developers/docs/6.4.1/neutrino/user_guide/fsystems.html#QNX6_filesystem
3.QNX6 filesystem in system architecture
http://www.qnx.com/developers/docs/6.4.1/neutrino/sys_arch/fsys.html#QNX6_filesystem
4. $QNX_TARGET/usr/include/sys/fs_qnx6.h