set-environment-variable Lassi Kortela (05 Dec 2019 00:18 UTC)
Re: set-environment-variable John Cowan (05 Dec 2019 19:48 UTC)
Re: set-environment-variable hga@xxxxxx (06 Dec 2019 00:29 UTC)
Re: set-environment-variable Lassi Kortela (06 Dec 2019 09:55 UTC)
Re: set-environment-variable John Cowan (06 Dec 2019 13:21 UTC)
Re: set-environment-variable Lassi Kortela (06 Dec 2019 13:53 UTC)
Re: set-environment-variable John Cowan (06 Dec 2019 17:51 UTC)
Re: set-environment-variable Arthur A. Gleckler (06 Dec 2019 18:45 UTC)
Re: set-environment-variable Lassi Kortela (06 Dec 2019 19:00 UTC)
Re: set-environment-variable Lassi Kortela (06 Dec 2019 20:41 UTC)
Re: set-environment-variable hga@xxxxxx (07 Dec 2019 15:07 UTC)
Re: set-environment-variable Lassi Kortela (07 Dec 2019 16:14 UTC)
Re: set-environment-variable Lassi Kortela (07 Dec 2019 16:23 UTC)
Re: set-environment-variable hga@xxxxxx (07 Dec 2019 16:30 UTC)
Re: set-environment-variable John Cowan (07 Dec 2019 17:31 UTC)
Re: set-environment-variable Lassi Kortela (07 Dec 2019 20:12 UTC)
Is set-environment-variable needed after all? Lassi Kortela (07 Dec 2019 20:15 UTC)
Re: Is set-environment-variable needed after all? John Cowan (07 Dec 2019 21:13 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (08 Dec 2019 19:36 UTC)
Re: Is set-environment-variable needed after all? hga@xxxxxx (08 Dec 2019 20:08 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (09 Dec 2019 11:00 UTC)
Re: Is set-environment-variable needed after all? Duy Nguyen (09 Dec 2019 03:51 UTC)
Re: Is set-environment-variable needed after all? John Cowan (09 Dec 2019 04:21 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (09 Dec 2019 10:39 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (09 Dec 2019 10:41 UTC)
Re: Is set-environment-variable needed after all? Duy Nguyen (09 Dec 2019 10:45 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (09 Dec 2019 10:49 UTC)
Re: Is set-environment-variable needed after all? John Cowan (09 Dec 2019 19:36 UTC)
Re: Is set-environment-variable needed after all? Lassi Kortela (09 Dec 2019 19:46 UTC)

Re: set-environment-variable Lassi Kortela 07 Dec 2019 16:14 UTC

> After accepting the PR, following my MO I'm implementing it in Chibi
> Scheme.

Thanks! Sorry I dropped the ball on that. I think Chibi has getenv
already, but not setenv.

> Turns out POSIX gives us an option not exposed by this or
> other Scheme APIs I've glanced at, an overwrite argument, see:
> https://pubs.opengroup.org/onlinepubs/9699919799/functions/setenv.html
>
>> If the environment variable named by envname already exists and the
>> value of overwrite is non-zero, the function shall return success
>> and the environment shall be updated. If the environment variable
>> named by envname already exists and the value of overwrite is zero,
>> the function shall return success and the environment shall remain
>> unchanged.
>
> It is worthwhile to add this to the SRFI 170 API, as, say, an
> optional argument, defaulting to overwrite?

Yeah, that flag has been in the Unix/C API since forever. I've never
seen anyone use it... People always want to overwrite the old value.
Therefore I suggest leaving out the option from the Scheme API.

The WinAPI function is SetEnvironmentVariable().
<https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setenvironmentvariable>