Dbus calls interlock issue

[Scott James Remnant]

On Fri, 2009-02-13 at 15:50 +0000, Simon McVittie wrote:

> One of the few safe things to do is write the pid to a pipe (as in pipe(2))
> and return; whenever a pid can be read from the other end of the pipe in
> your main loop, do your cleanup and D-Bus interactions there.
> 
Though note that if you spawn a large number of children, it is possible
for this pipe to be filled such that the signal handled blocks on
write()

It's generally better to use pselect() or ppoll() and otherwise mask
SIGCHLD out from your process.

Scott
-- 
Scott James Remnant
scott at canonical.com
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