ACL_PERM_READ
if (perm & ACL_PERM_READ)
myperm |= ACL_PERM_READ;
#define ACL_PERM_BITS (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)
#define ACL_POSIX1E_BITS (ACL_PERM_EXEC | ACL_PERM_WRITE | ACL_PERM_READ)