The history of sending signals to Unix process groups

Re:The history of sending signals to Unix process groups by amelius on Tuesday September 06, 2022 @06:34AM (#32735228)

Question: can we control a Linux process (with all its threads, signal handlers etc.) in a completely deterministic way, e.g. by using ptrace() on it?

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Re:The history of sending signals to Unix process groups by sporksmith on Tuesday September 06, 2022 @07:36AM (#32735672)

Yes. Though I'm not sure I see the connection to the OP...?

The example I'm most familiar with, because I work on it, is Shadow. We used ptrace for a bit but now use seccomp.

https://github.com/shadow/shadow/

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Re:The history of sending signals to Unix process groups by rollcat on Tuesday September 06, 2022 @07:15AM (#32735502)

Sorry for no references, it's off the top of my head. There were past attempts at confining / "jailing" processes based on ptrace, it ended up being racey and/or escapeable. If you're relying on cooperation for isolation, you're back to square 1.

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