Re: RE: {bb} Kernel error from bbd on RH linux 9

In <[email protected]> Jeff Stoner <[email protected]> writes:

>>From Red Hat's Seawolf (7.1) man page on signal(2):

>According  to  POSIX  (B.3.3.1.3) you must not set the action for
>SIGCHLD to SIG_IGN.  Here the BSD and SYSV behaviours differ, causing
>BSD software that sets the action for SIGCHLD to SIG_IGN to fail on
>Linux.

>CONFORMING TO
>       ANSI C


A newer man-page from Red Hat 9 (the one that is referred to 
in the error message logged):

NOTES
       The Single Unix Specification describes a flag SA_NOCLDWAIT
       (not supported 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.
-- 
Henrik Storner <[email protected]> 
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=
To unsubscribe from this list send e-mail to mailto:[email protected]
with unsubscribe bbd in the BODY of the message.