Admin catalog setup

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/9.2/static/adminpack.html
Description:

This is the script shown on the website:
int8 pg_catalog.pg_file_write(fname text, data text, append bool)
bool pg_catalog.pg_file_rename(oldname text, newname text, archivename
text)
bool pg_catalog.pg_file_rename(oldname text, newname text)
bool pg_catalog.pg_file_unlink(fname text)
setof record pg_catalog.pg_logdir_ls()
/* Renaming of existing backend functions for pgAdmin compatibility */
int8 pg_catalog.pg_file_read(fname text, data text, append bool)
bigint pg_catalog.pg_file_length(text)
int4 pg_catalog.pg_logfile_rotate()

It states that it should be run as a superuser. I am new to postgresql. I
ran these step because I will be using pgadmin3. I ran the scripts in psql
as myself who is a superuser. I got nothing back from these commands. How
can I check if it ran correctly?

Thank you,