# Re: \[RFC\]\[PATCH\] seccomp: add SECCOMP\_RET\_ACK for non-fatal SIGSYS

- From: Jeffrey Vander Stoep \<hidden\>
- Date: 2016-01-29 03:04:01 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2016/01/4672641
- Thread: https://ratatoskr.run/linux-api/2016/01/4672367/t.md

```text
Thanks! This is just what I need.

What are the drawbacks to returning the sigsys before executing the
system call? Otherwise this loses the benefit of properly reporting
registers for argument inspection.

How about SECCOMP_RET_PERMISSIVE? Describes the application rather
than the implementation. Otherwise preference is for
SECCOMP_RET_ALLOW_SIGSYS.
```