K 10
svn:author
V 6
jilles
K 8
svn:date
V 27
2009-11-17T22:47:20.385022Z
K 7
svn:log
V 297
Add pwait utility, which waits for any process to terminate.

This is similar to the Solaris utility of the same name.

Some use cases:
* rc.subr's wait_for_pids
* interactive use, e.g. to shut down the computer when some task is done
  even if the task is already running

Discussed on:	hackers@

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