Anything else are not portable APIs that don't have necessarily to do with UNIX.
It doesn't matter that the kernel is UNIX like, if what is on top of it isn't.
And anyone that only knows GNU/Linux as UNIX, should read "Advanced Programming in the UNIX Environment" from W. Richard Stevens/Stephen A. Rago, to see what actually means to write portable UNIX code across POSIX implementations.
Android? In this context, that's UNIX. MacOS X is UNIX. Even the z/OS on the mainframe has a UNIX03 compliant UNIX subsystem. You were saying...?
GUI is dead; if your application doesn't run on the server and display the results either on the command line or in a web browser, you're doing it wrong.
> Android? In this context, that's UNIX. MacOS X is UNIX. Even the z/OS on the mainframe has a UNIX03 compliant UNIX subsystem. You were saying...?
So you use VI and Emacs on Android, generate postscript and troff files, configure /etc/passwd and /etc/init.d
How does your Android .profile look like?
Yes z/OS has a POSIX subsystem, it also doesn't support anything besides CLI, daemos and batch processing.
Mac OS X is a certified UNIX, however none of the APIs that matter. You known, those written in Objective-C and Swift are UNIX.
> GUI is dead; if your application doesn't run on the server and display the results either on the command line or in a web browser, you're doing it wrong.
Better let all of those that earn money targeting infotainment systems, medical devices, factory control units, GPS units, iOS, Android, game consoles, smart watches, VR units, POS, ... that they are doing it wrong.
So you use VI and Emacs on Android, generate postscript and troff files, configure /etc/passwd and /etc/init.d
I don't use Android, because it's a ridiculously hacked-up version of GNU/Linux (as if being based on GNU/Linux isn't bad enough).
Have you spawned a shell on it? The filesystem is a royal mess, the likes of which I've never seen before. Could I run vi and groff and even SVR4 nroff on it? Yes, if I wanted to waste my time with it, I could.
How does your Android .profile look like?
I didn't touch .profile because I don't care for bash one bit, but it was there.
However, in this context, it's still UNIX. A hacked-up, ugly UNIX severely mutilated to run on mobile telephones and tables, but conceptually UNIX nevertheless (honestly, I have never seen anything to hacked-up and mutilated like Android, and you can bet that in 30+ years of working with computers, one sees all kinds of things).
There isn't a standard UNIX way to do GUIs, bluetooth, NPC, GPGPU, touch screens, cryptography, printers, medical devices, ...
All that UNIX has is POSIX, http://pubs.opengroup.org/onlinepubs/9699919799/ , which only focus on CLI and daemons as applications.
Anything else are not portable APIs that don't have necessarily to do with UNIX.
It doesn't matter that the kernel is UNIX like, if what is on top of it isn't.
And anyone that only knows GNU/Linux as UNIX, should read "Advanced Programming in the UNIX Environment" from W. Richard Stevens/Stephen A. Rago, to see what actually means to write portable UNIX code across POSIX implementations.