K 10
svn:author
V 2
ed
K 8
svn:date
V 27
2015-07-09T12:04:45.327709Z
K 7
svn:log
V 595
Don't clobber td->td_retval[0] in proc_reap().

While writing tests for CloudABI, I noticed that close() on process
descriptors returns the process ID of the child process. This is
interesting, as close() is only allowed to return 0 or -1. It turns out
that we clobber td->td_retval[0] in proc_reap(), so that wait*()
properly returns the process ID.

Change proc_reap() to leave td->td_retval[0] alone. Set the return value
in kern_wait6() instead, by keeping track of the PID before we
(potentially) reap the process.

Differential Revision:	https://reviews.freebsd.org/D3032
Reviewed by:	kib

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