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Re: Possible bug with BASH V4: The "$!"

From: Dan Douglas
Subject: Re: Possible bug with BASH V4: The "$!"
Date: Thu, 11 Apr 2013 08:24:53 -0500
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On Thursday, April 11, 2013 01:05:43 PM Lenga, Yair wrote:
> With BASH 3.0, the backgrounded task could access the PID of the parent using
> "$$", and the PID Of itself as "$!".
> With BASH 4.0, the script fail, the "$!" is not available to the child
> process.
> Is it possible to add back the functionality to allow the child process to
> somehow retrieve it's OWN PID.  I assume that the behavior of  "$$" cannot be
> modified at this time.

BASHPID was introduced in Bash 4. I would guess that prior to that, the
behavior of $! was either a nonstandard extension or unintentional bug. Check
the changelog.

Dan Douglas

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