Mechanism to query existing signal handler
cpick opened this issue · comments
If NULL is passed as the second (new action) argument to sigaction()
, then it won't make any changes, but will return the existing action.
I don't believe nix provides any way to access this behavior. The type of nix::sys::signal::sigaction()
s sigaction
argument could be changed from &SigAction
to Option<&SigAction>
, but this would be a breaking change and also would mean doing a read-only query of the current action would only be possible with an unsafe
function call.
I'd prefer something like a safe sigaction_get()
(roughly akin to this proposal for a sigaction_safe()
).
Could you suggest a complete API, or better yet post a PR?
Could you suggest a complete API, or better yet post a PR?
Sure thing.
I've opened #2190 with my suggested implementation.