New utime32_t and utimeval32 types have been defined in the system headers in #OracleSolaris 11.4.90 for places where binary compatibility forces a 32-bit time value, but unsigned values can be used to represent times from 1970-2106 instead of the traditional signed 32-bit range of 1901-2038.
The bufmod(4m) interface was modified to use these, allowing snoop(8) to become #Y2038 safe (though still destined to fail in 2106). snoop also became a 64-bit program in this release.