sigblock,sigmask,sigsetmask ... for SYS V?

[Dave Eisen]

In article <1991Jun25.165700.17625 at flood.com> tom at flood.com (Tom Chatt) writes:
>Yes, but the important question is: can you emulate sigpause?
>The sigpause(2) call, which *atomically* waits for signals on
>a provided signal mask, is essential to properly avoid the
>critical races otherwise inherent in managing signals.

You can't. That's why BSD changed the AT&T signal handling so drastically.