Subj : pthread_sigmask in single thread application
To   : comp.programming.threads
From : Harshana
Date : Mon Jan 03 2005 11:35 pm

Hi all,

I have a single thread, socket based program that need to handle
SIG_CHILD when any of its child processes exits. But signals should
come only when its in select() loop. So I use pthread_sigmask() BLOCK
and UNBLOCK to prevent SIG_CHLD from coming while working outside of
select(). But recently I have noticed that signals doesn't get blocked
with pthread_sigmask(BLOCK). I have seen this kind of behaviour when
linked without -lpthread. But now irrespective of linking -lpthread
library, sigmask() doesn't work. Anyone has any idea why its happening
like this? Can anyone suggest me a solution?

I'm developing this on "SunOS dev 5.9 Generic_112233-10 sun4u sparc
SUNW,Sun-Fire" and
running on "SunOS cpu10 5.9 Generic_112233-10 sun4u sparc
SUNW,Ultra-Enterprise"

Thanks in advance,
Harshana

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