Misc functions for administrative purposes

size.c:
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int8 pg_tablespace_size(oid)
int8 pg_database_size(oid)
int8 pg_relation_size(oid)
text pg_size_pretty(int8)


genfile.c (superuser only):
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record pg_file_stat(fname text)
int8 pg_file_length(fname text)
text pg_file_read(fname text, offs int8, len int8)
int8 pg_file_write(fname text, data text, append bool)
bool pg_file_rename(oldname text, newname text)
bool pg_file_rename(oldname text, newname text, archivname text)
bool pg_file_unlink(fname text)
setof text pg_dir_ls(dirname text, bool fullpath)


misc.c (superuser only):
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int4 pg_reload_conf()
bool pg_logfile_rotate()
setof record pg_logdir_ls()

VIEW pg_logdir_ls(filetime timestamp, pid int4, filename text)