Re: signalfd()

On Mon, 24 Feb 2025 14:18:44 GMT
scott@slp53.sl.home (Scott Lurndal) wibbled:

Muttley@DastardlyHQ.org writes:

Hi
>
I've been playing around with signalfd() on linux and it seems to work but
there also seems to be zero information other than the signal number in the
signalfd_siginfo structure returned from a read().
>
Where I'd expect PID and UID to be set as in reception of a signal handler
set using sigaction with the siginfo_t passed to the handler, the below code
returns 0 for everything in the signalfd_siginfo structure.

>
I wonder if you still need to call sigaction with SA_SIGINFO before
using signalfd?

Actually my mistake - the pid and uid are only zerop when it receives a signal
from the terminal but when another process sends it it works ok. Thanks for
the idea though.