"I. Szczesniak" <iszczesniak at gmail.com> wrote:
> > I find it hard to believe that more than 32 realtime signal numbers
> > is ever really needed,
>
> POSIX introduced two USR signals years ago (SIGUSR1 and SIGUSR2) and
> not one. The committee even then realised that one USR signal is not
> enough.
> In our case RT signals are used as extended USR signals with special
> delivery gurantees.
SIGUSR1 and SIGUSR2 have been introduced by AT&T (IIRC with SVr2) which
is long before POSIX exists.
J?rg
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