I'm reasonably familiar with the usage of both g_spawn_sync and
g_spawn_async, but recently I've found myself wanting to do domething that
seems to fall between the two and I can't quite work out how to do it.
Here's the task: I want to spawn an mpiexec process from my GTK app and,
assuming all goes well, wait for the result (in itself that's a case of
g_spawn_sync). But I also want to know the PID of mpiexec, so that I can
give the user the option of killing that process "prematurely" if it seems
to be going wrong. (This is based on the observation that an MPI_Bcast
call, for example, can hang at 100% CPU if one or more of the processes
launched by mpiexec bombs out at just the wrong moment.)
Any suggestions on how to achieve this using g_spawn* (or judgements on
whether it's even possible) would be gratefully received.
--
Allin Cottrell
Department of Economics
Wake Forest University, NC
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