CODEWITHSUNDEEP
pythonsubprocesspython-oschroot
fatih
fatih

Reputation: 1

Install Package in Chroot. Script running outside Chroot

I am trying to do a kind of analyzer. To do that I need to work with different distributions I decided on trying chroot. What im trying to do is,

I have checked out pychroot. It basically works as context manager.

However, when I enter into Chroot context and run apt-get install. The script execution freezes. When I check the Chroot, I find that the package is installed. But I end up killing processes eventually.

Below, you can find a simplified example of code that freezes:

with Chroot(path) as chroot:
      subprocess.run(installation_command)

When strace the frozen apt-get subprocess, I get the following output:

(.venv) user@server:$ ps aux | grep apt
root     2797755  0.4  0.1  62656 53380 pts/17   T    08:58   0:00 apt-get install -y bluez-dbg
fatih.d+ 2798237  0.0  0.0   8964   656 pts/16   R+   09:00   0:00 grep --color=auto apt
(.venv) user@server:$ sudo strace -p 2797755
strace: Process 2797755 attached
--- stopped by SIGTTOU ---

(.venv) user@server:$ ps aux | grep python
root     2797660  0.2  0.4 339364 133848 pts/17  S    08:58   0:01 python test.py
root     2797740  0.0  0.3 339364 101696 pts/17  S    08:58   0:00 python test.py
root     2797746  0.0  0.3 339364 101400 pts/17  S    08:58   0:00 python test.py
root     2797749  0.0  0.3 339364 102344 pts/17  T    08:58   0:00 python test.py

(.venv) user@server:$ sudo strace -p 2797660
strace: Process 2797660 attached
read(7, ^Cstrace: Process 2797660 detached
 <detached ...>

(.venv) user@server:$ sudo strace -p 2797740
strace: Process 2797740 attached
wait4(-1, ^Cstrace: Process 2797740 detached
 <detached ...>

(.venv) user@server:$ sudo strace -p 2797746
strace: Process 2797746 attached
wait4(-1, ^Cstrace: Process 2797746 detached
 <detached ...>

(.venv) user@server:$ sudo strace -p 2797749
strace: Process 2797749 attached
--- stopped by SIGTTOU ---
^Cstrace: Process 2797749 detached

Upvotes: 0

Views: 232

Answers (0)

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