## Implements

- rand
- get_byte_order
- dec2str
- typeof
- isnull
- unixtime
- localtime
- mktime
- usleep
- sleep
- gzip
- gunzip
- defined_func

## Missing
- dump_ctxt
- exit
- gettimeofday
- index
- keys
- make_array
- make_list
- max_index
- open_sock_kdc
- safe_checks
- sort
- unixtime
