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Created SC2173 (markdown)

koalaman
2015-10-31 17:34:32 -07:00
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## SIGKILL/SIGSTOP can not be trapped.
### Problematic code:
```sh
trap 'echo "unkillable"' KILL
```
### Correct code:
Not applicable. This is not possible.
### Rationale:
SIGKILL and SIGSTOP can not be caught/ignored (according to POSIX and as implemented on platforms including Linux and FreeBSD). Trying to trap this signal has undefined results.
### Exceptions:
None. If you come across one, please file an issue about it.