• locale and codeset
• current working directory
• user home directory
• temporary directory
• OS name, arch and version
• Current date and time in PDF format (for TeX formats that don’t provide \pdfcreationdate)
• Date-time stamp of a file in PDF format (for TeX formats that don't provide \pdffilemoddate)
• Size of a file in bytes (for TeX formats that don’t provide \pdffilesize)
• Contents of a directory (captured as a list)
• Directory contents filtered by regular expression (captured as a list)
• URI of a file
• Canonical path of a file

• texosquery.tex: generic TeX code
• texosquery.sty: LaTeX package

The author is Nicola Talbot. The package is Copyright © 2016-2017 Nicola Talbot.