NAME¶

Devel::CheckOS::Families - what OS "families" are supported "out of the box" by Devel::CheckOS and Devel::AssertOS?

WHAT IS AN OS FAMILY¶

Computing platforms fall into several categories. For example, there is the category of Unix-a-likes. Each of these categories is a "family". A platform can fall into several families.

THE Unix FAMILY¶

Broadly speaking, these are platforms where:

Devices are represented as pseudo-files in the filesystem

Symlinks and hardlinks are supported in at least some filesystems

"Unix-style" permissions are supported

That is, there are seperate read/write/execute permissions for file owner, group and anyone. This implies the presence of multiple user accounts and user groups. Permissions may not be supported on all filesystems.

The filesystem has a single root

The C API for the operating system is largely POSIX-compatible

THE Linux FAMILY¶

This includes both ordinary Linux and Android. Plain old Linux will match 'Linux'. Android will match both that and 'Android'.

THE Linux::Debian FAMILY¶

Up until version 1.84 this wasn't a family, and would match any platform which claimed to be Debian via "lsb_release -i" or on which a file called "/etc/debian_version" existed. That meant that as well as matching real Debian, it would also match Ubuntu, Raspbian, and so on. As of version 1.85 "Linux::Debian" has become a family of all the Debian-based Linuxes. If you want to test which particular family member you're on then look at list_family_members("Linux::Debian") to see what's available.

NB the difference between "Linux::RealDebian" (which uses "lsb_release" for identification) and "Linux::UnknownDebianLike" (which uses the existence of "/etc/debian_version" for identification). In particular beware that some *very* old Debians don't have "lsb_release" available and so will be detected as "Linux::UnknownDebianLike".

THE MicrosoftWindows FAMILY¶

This includes any version of Windows and also includes things like Cygwin which run on top of it.

THE DEC, Sun, and Apple FAMILIES¶

These include any OS written by, respectively, DEC, Sun, and Apple. They exist because, while, eg, Mac OS Classic and Mac OS X are very different platforms, they do support some unique features - such as AppleScript.

THE Realtime FAMILY¶

This is for all real-time OSes. So far, it only includes QNX.

THE EBCDIC FAMILY¶

OSes which use EBCDIC instead of ASCII.

AUTHOR, COPYRIGHT and LICENCE¶

Copyright 2023 David Cantrell <david@cantrell.org.uk>

This documentation is free-as-in-speech. It may be used, distributed and modified under the terms of the Creative Commons Attribution-Share Alike 2.0 UK: England & Wales License, whose text you may read at <http://creativecommons.org/licenses/by-sa/2.0/uk/>.

CONSPIRACY¶

This documentation is also free-as-in-mason.