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From: Mikhail Teterin <mi+mx@aldan.algebra.com>
Organization: Virtual Estates, Inc.
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Subject: SIGINFO and pthreads
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Hello!

I have a program, which updates the user with its status upon receiving a 
SIGINFO (like dump, cp, dd, and fsck do). The exact same handler is installed 
for SIGUSR1 (TclX does not know about SIGINFO and I needed to a Tcl script to 
interact with the program too).

When I made the program multi-threaded, it stopped reacting to the SIGINFO. It 
still reacts to the SIGUSR1, but completele ignores SIGINFO now...

If I disable the multi-threading, SIGINFO is processed again...

What's special about SIGINFO and pthreads? Thanks!

	-mi