There's nothing in the code that sets the action for SIGCHLD to SIG_IGN.
> Hi,
>
> I use persistentperl 2.22 on FC1 with OpenWebmail.
>
> The following error is presented in the messages log:
>
> May 15 06:00:01 gazelle kernel: application bug: perperl_backend(8615) has
> SIGCHLD set to SIG_IGN but calls wait().
> May 15 06:00:01 gazelle kernel: (see the NOTES section of 'man 2 wait').
> Workaround activated.
>
> and reading the notes section of the man 2 wait page, has the following on
> this error:
>
> The Single Unix Specification describes a flag SA_NOCLDWAIT (not sup-
> ported under Linux) such that if either this flag is set, or the action
> for SIGCHLD is set to SIG_IGN then children that exit do not become
> zombies and a call to wait() or waitpid() will block until all children
> have exited, and then fail with errno set to ECHILD.
>
> The original POSIX standard left the behaviour of setting SIGCHLD to
> SIG_IGN unspecified. Later standards, including SUSv2 and POSIX
> 1003.1-2001 specify the behaviour just described as an XSI-compliance
> option. Linux does not conform to the second of the two points just
> described: if a wait() or waitpid() call is made while SIGCHLD is being
> ignored, the call behaves just as though SIGCHLD were not being
> ignored, that is, the call blocks until the next child terminates and
> then returns the PID and status of that child.
>
> Can we fix this?
>
> Michael.
>
>
>
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