Merge #119

119: simplify function to determine the enviornment r=stlankes a=stlankes

- avoid using of __sys_malloc
- remove unneeded unsafe code

Co-authored-by: Stefan Lankes <slankes@eonerc.rwth-aachen.de>
Co-authored-by: bors[bot] <26634292+bors[bot]@users.noreply.github.com>