SIGCHLD and sigaction()

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

Another question in the context of SIGCHLD:

When I install a SIGCHLD handler via sigaction() using SA_SIGINFO, 
is it guaranteed that my handler is called (at least) once per 
death-of-a-child? There is sentence in SUS

If SA_SIGINFO is set in sa_flags, then subsequent occurrences of sig 
generated by sigqueue() or as a result of any signal-generating function 
that supports the specification of an application-defined value (when sig 
is already pending) shall be queued in FIFO order until delivered or accepted;

that may cover this but that I don't understand.