https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/
V1_chap08.html
TMPDIR This variable shall represent a pathname of a directory made
available for programs that need a place to create temporary
files.
Ports like PHP benefit from having this environment variable set, and
there exist a lot of scripts that assume the presence of such an
environment variable.
This introduces a new X86 CPU emulator for running SerenityOS userspace
programs in a virtualized interpreter environment.
The main goal is to be able to instrument memory accesses and catch
interesting bugs that are very hard to find otherwise. But before we
can do fancy things like that, we have to build a competent emulator
able to actually run programs.
This initial version is able to run a very small program that makes
some tiny syscalls, but nothing more.
