WAITing for specific process

[Doug Gwyn <gwyn>]

> ...  A list of terminated processes' statuses
> needs to be kept in the parent process, so that it can be examined by
> something like the "waitfor" proposed above.  Switching to such a mechanism
> almost certainly precludes the standard use of wait(), SIGCHLD, etc.  A
> layer on top of them is needed and everyone needs to be convinced to use
> only that layer (e.g. fread vs. read).  ...

Yes, a very good idea.  You still have to watch out for children
you may unknowingly have when started (as the last process in a
pipeline), but that should be no problem so long as it is taken
into account.