# from POSIX.pm
F_OK
W_OK
X_OK
R_OK
FILENAME_MAX
LINK_MAX
MAX_CANON
NAME_MAX
PATH_MAX

# Linux OpenSuSE 11.4
S_IRGRP
S_IROTH
S_IRUSR
S_IRWXG
S_IRWXO
S_IRWXU
S_IWGRP
S_IWOTH
S_IWUSR
S_IXGRP
S_IXOTH
S_IXUSR
S_IFMT
S_IFIFO
S_IFCHR
S_IFDIR
S_IFBLK
S_IFREG
S_IFLNK
S_IFSOCK
S_ISVTX
S_IFWHT