operating with tmp files fails in subprocess

[syrusakbary]

When you run a program, and that program creates a subprocess that tries to operate with a temporal directory, it fails.

Steps to reproduce

$ wasmer run python/python

Then:

import subprocess; subprocess.run(["/bin/python"])

Then:

import tempfile; tempfile.mkdtemp(prefix=f"pip-a-")

Should succeed. Now it fails:

➜  wasmer run python
Could not find platform dependent libraries <exec_prefix>
Python 3.12.0 (heads/wasix-compatibility-dirty:186ebc7b8b, Oct  3 2023, 10:47:09) [Clang 15.0.6 ] on wasix
Type "help", "copyright", "credits" or "license" for more information.
>>> import tempfile
>>> tempfile.mkdtemp(prefix=f"pip-a-")
'/tmp/pip-a-kzbg1opp'
>>> import subprocess; result = subprocess.run(["/bin/python"])
Could not find platform dependent libraries <exec_prefix>
Python 3.12.0 (heads/wasix-compatibility-dirty:186ebc7b8b, Oct  3 2023, 10:47:09) [Clang 15.0.6 ] on wasix
Type "help", "copyright", "credits" or "license" for more information.
>>> import tempfile
>>> tempfile.mkdtemp(prefix=f"pip-a-")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/cpython/lib/python3.12/tempfile.py", line 368, in mkdtemp
    _os.mkdir(file, 0o700)
PermissionError: [Errno 2] Permission denied: '/tmp/pip-a-xycr51b9'
>>>

As we see, the initial tempfile.mkdtemp(prefix=f"pip-a-") works in the first python process, but not in the child python one