[m-users.] How to get the environment

[Peter Wang]

On Fri, 22 Mar 2019 12:50:18 +0100, Volker Wysk <post at volker-wysk.de> wrote:
> Hi
> 
> There is io.get_environment_var/4, but this gets just one environment 
> variable. For the posix.exec/5 predicate, the entire environment is needed, as 
> a map(string,string). There are no foreign predicates for the other variants 
> of exec (such as execv), which don't require the environment.
> 
> I've searched in the io and posix libraries, but couldn't find any way to 
> query the entire environment. Could it be that there isn't any...?
> 

Hi,

There isn't any yet, possibly because POSIX does not define any way to
do so. The foreign proc would need to read from the non-POSIX `environ'
global variable or _NSGetEnviron() on MacOS.

Peter