[TUHS] MacOS X is Unix (tm)

Joerg Schilling schily at schily.net
Wed Jan 4 02:47:00 AEST 2017


Derek Fawcus <dfawcus+lists-tuhs at employees.org> wrote:

> FWIW, on 10.10.5 [1] this gives essentially the same result as the prior program,
> the signal handler seeing the same sign extended 24 bit value:
>
> $ ./posix2
> received SIGCHLD (20), si_pid: 2281 si_status: -6946094 si_code: 1
> SIGCHLD: si_status in struct siginfo should be 1234567890 (0x499602d2) but is -6946094 (0xff9602d2)
> ret: 0 si_pid: 2281 si_status: -6946094 si_code: 1
> si_status in struct siginfo should be 1234567890 (0x499602d2) but is -6946094 (0xff9602d2)

OK, then the main change during the past 8 years was that Apple now includes 
the siginfo structure in sys/wait.h and that si_pid and si_code are now filled 
in.

> Mind,  one should probably assign the handler to sa.sa_sigaction, as someone
> could implement the struct w/o both fields in a union.

Done - thank you....

Jörg

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