On Wed, Nov 08, 2000 at 09:52:07AM +0100, Raphael Quinet wrote:
> Included below is a small test program that checks how the OS behaves
> when a child process exits while the parent is blocking on waitpid()
> and has a SIGCHLD handler installed (which also calls waitpid, and
> thus could steal the status if the signal handler is called before
> the first waitpid returns).

ignatios@theory 14 % ./waittest.sol2.6.gcc
installing signal handler...
waiting for child 419 to exit...
child 419 has exited
  sig_pid = 419
  sig_status = 25600
  main_pid = -1
  main_status = 9999
sigchld handler was called before waitpid (no status)

Oops, you knew this already, I guess.

SunOS4.1.4 with cc deosn't compile it at all.

with gcc: 
waittest.c:28: `SA_RESTART' undeclared (first use this function)

and I have to read manuals to find out what to do about it.

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