This extension for some basic file system functions.

After checkout the code run that command:

make install

Please note: Do not forget edit Makefile for PG_CONFIG entry.

And then go to psql console and install the extension for your db

$ psql dbname

dbname# CREATE EXTENSION fio;

After creating extension, you can use functions with fio_ prefix.

For example:

dbname=# select fio_readdir('/usr/', '*');
  fio_readdir 
-------------
 (include)
 (src)
 (lib64)
 (.)
 (tmp)
 (pgsql-9.3)
 (bin)
 (..)
 (libexec)
 (local)
 (lib)
 (share)
 (games)
 (pgsql-9.4)
 (etc)
 (java)
 (sbin)
(17 rows)
dbname=# 

• pathname: the path's name you want to change mode
• mode: string for mode (ex: '0777')

• pathname: the path's name you want to create
• mode: string for mode (ex: '0777')
• recursive: create directory recursion

• pathname: the path's name you want to list of files/directories
• pattern: shell like pattern you want to filter (ex: '*.jpg')

• filename: The file's name you want to read. Return type is bytea.

• filename: The file's name you want to create/write.
• content: What content you want to write the file.
• mkdir: If true, it creates directory with given filename. Creates directory with recursion option.
• overwrite: If true overwrite file if already exists. If false and file exists it fails.

• filename: The file's name you want to remove.

• filename: The file's name you want to rename.
• newfilename: The new file's name