I have tried to extract environment variables in a Python process with help of
env --null, which works even for environment variables containing newline character.
But on some machines I have received an error:
> env -0 env: invalid option -- '0' > env --null env: unrecognized option '--null' > env --version env (GNU coreutils) 6.12 Copyright (C) 2008 Free Software Foundation, Inc.
In which version was the argument introduced? Is there any alternative command to extract the environment?