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bin/48875: possible ash backgrounding bug
>Number: 48875
>Category: bin
>Synopsis: possible ash backgrounding bug
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: bin-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Thu Jun 05 16:20:00 +0000 2014
>Originator: Edgar Fuß <ef%math.uni-bonn.de@localhost>
>Release: NetBSD 6.1_STABLE
>Organization:
Mathematisches Institut der Universität Bonn
>Environment:
Architecture: x86_64
Machine: amd64
>Description:
When doing $() command substitution calling a background function,
evaluation pauses until the backgrounded process finishes.
This doesn't happen if the function body is expanded inside the
substitution.
>How-To-Repeat:
The first echo will finish imediately, the second only after three
seconds:
#!/bin/sh
f() {
sleep 3
}
echo $(sleep 3 >&- & echo $!)
echo $(f >&- & echo $!)
>Fix:
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