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Re: wait inside subshell waits for sibling

From: Oğuz
Subject: Re: wait inside subshell waits for sibling
Date: Mon, 24 Oct 2022 11:30:24 +0300

24 Ekim 2022 Pazartesi tarihinde Robert Elz <kre@munnari.oz.au> yazdı:

> [...] That the shell happens to
> have forked other processes for its own reasons should make no
> difference at all.


In the case of process substitutions it is documented that their use may
change wait's behavior

> If id is not
> given, wait waits for all running background jobs and
> the last-executed process substitution, if its process
> id is the same as $!,

but what the manual says is not what actually happens; in the OP $! is the
PID of : & when wait is called. And it doesn't even wait for only the
last-executed one, it waits for all of them:

    $ ( : & wait ) > >(sleep 3) > >(:)
    *hangs for 3 seconds*


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