Agena

2.17.2, February 25, 2020 - This edition primarily implements improvements to the OS/2, DOS and Windows versions of Agena. Thus, there are no non-`DOS-based` installers this time. - `os.drives` (available drive letters) and `os.drivestat` (info on file systems) now return drive information in both the OS/2 and DOS version of Agena. - Agena for DOS now supports `os.realpath`. - In DOS, `io.sync`, `binio.sync` and `ads.sync` now flushes the write-behind disk caches, as well. - In DOS and Windows, `os.curdrive` has been rewritten and is 45 percent faster now. It now also returns the drive letter with an appending colon in OS/2, DOS and Windows. - `os.drives` now appends a colon to each drive letter. - `os.getmodulefilename` now also works in Windows NT 4.0 and Windows 2000. - Initialisation of Agena in Windows NT 4.0 and 2000 has been improved. - In Windows, `os.drivestat` now also returns the DOS device name, such as '\Device\HarddiskVolume3`. - When being passed a 4-byte integer, `bytes.tobytes` now checks whether it is in signed or unsigned mode so that there are no accidental overflows. The description of the function in the Primer and Reference has been corrected, as well. - `strings.tobytes` now alternatively splits a string into 4-byte unsigned integers instead of single bytes.