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List:       cygwin-apps
Subject:    AW: HEADSUP: cygserver now has MSG, SEM and SHM support
From:       "Ralf Habacker" <Ralf.Habacker () freenet ! de>
Date:       2003-11-27 17:02:49
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> Corinna Vinschen wrote:
> Ok, I don't know how that's implemented in cygipc so I think it might
> be necessary to mention that:
>
> The implementation of the MSG, SEM and SHM functions in Cygwin are so
> that if the functions are not available (be it that CYGWIN doesn't
> contain the word "server" or Cygserver isn't running) not only set
> errno to ENOSYS, but they also raise a SIGSYS.
>
> So it's crucial that your code handles that signal.  At least, it
> should ignore it (signal(SISYS, SIG_IGN)).
>
Harold

for the Xserver that means, that the shm initialisation code has to be
changed to the detecting code used by FreeBSD and friends
(CheckForShmSyscall() in Xserver/Xext/shm.c and Xserver/Xext/xf86bigfont.c)

The cygipc-related stuff could then be removed in both files.

Ralf


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