uxterm from xterm-185-3 and xfontsel crashing when running under cygserver support

[Dr. Volker Zell]

>>>>> "Corinna" == Corinna Vinschen writes:

    Corinna> I've build my own debug version of the X stuff today and I tracked the
    Corinna> SEGV down.  It's an unfortunate combination of two bugs in the SHM
    Corinna> implementation:

    Corinna> - shmat() returns NULL on error instead of (void *)-1.

    Corinna> - shmat() only operates on shared memory segments of which the shmid
    Corinna>   has been retrieved using shmget() by the application itself.  I was
    Corinna>   absolutely sure that only the key argument to shmget() is a valid
    Corinna>   interprocess exchange value for identifying shared memory segments. 
    Corinna>   I wasn't aware that the shmid itself could be exchanged.

    Corinna> For today, I only fixed the first bug.  This fixes the SEGV in uxterm
    Corinna> and friends, but a fix for the second bug is necessary to get a working
    Corinna> Bigfont extension.  I hope to get this done next week.

I just tried your fix which seems to be in the 20040329 snapshot. But
now /usr/sbin/cygserver doesn't start anymore. I installed it as a
service with cygrunsrv. The same happens for my other cygwin service
/sbin/init which also refuses to start. In the process list I could see
4 !! /bin/cygrunsrv processes so. Reverting to 1.5.9 and all is fine.

    Corinna> Corinna

Ciao
  Volker