Re: bye with exit status

In article <vgfmfe$22uop$1@dont-email.me>,
Ruvim  <ruvim.pinka@gmail.com> wrote:

Many Forth systems running under an operating system provide
system-specific capabilities to terminate with an exit status [1].

Note that it is not Forth-system-specific but operating-system specific.
Once you leave the Forth, the exit status is non-existent, as far
as Forth is concerned.

>
For example, the following code fragments have stack effect ( n -- ⊥ )
and use n as the process exit status:
>
  SwiftForth "exitstatus ! bye"
  VfxForth   "exitcode ! bye"
  Gforth     "(bye)"
  ciforth    "exit-code ! bye"
  mf3        "sysexit"
  Post4      "bye-code"
  SP-Forth   "halt"
>
Could you suggest some names for the word with this functionality so
that one of them can be standardized?

A turnkey process should not detect an error, or if it is, that
error should be the users fault.
In ciforth I immediately terminate a turnkey process in case of an error.
(The user has an alternative: starting a Forth, then 'SOMETHING CATCH.
He misses nothing.)
The error number is the same as reported in the interpreter and is
documented in the application, or the Forth itself.

>
This word should not output any messages.

Which word? Do you propose the functionality of Gforth's (bye)
in the standard?

>
>
There are at least three different notions of premature termination of
code execution:
  — return from a Forth definition (to the caller)
  — terminate a thread/task
  — terminate the process
And they should not be confused.

IMO all error conditions should have a distinct error number.
So a distinction between the conditions must be made in the
documentation of this error number. No need to theorize about
a common convention between the types of error.

The second set me thinking. This means that EXIT-CODE should be
a user variable. I follow Chuck Moore, I build that bridge if
I must cross the Rubicon.

[1] <https://en.wikipedia.org/wiki/Exit_status>
--
Ruvim
>

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