Too Many Files Open Error During Shared Memory Attach

[Sean Landis]

staggers at casbah.acns.nwu.edu (Ken Staggers) writes:

>If anybody knows the answer to the problem below, please respond as soon
>as possible....thanks a plenty!

> ... Lot's deleted ...

The man page for shmop(2) indicates:


          [EMFILE]       The number of shared memory segments attached
                         to the calling process would exceed the
                         system-imposed limit.

If you look in /usr/include/sys/errno.h:

...
#define EMFILE  24      /* Too many open files                  */
...

Which is what drives perror().  Now what this really means is that your
process is violating a tunable parameter called SHMSEG.  The attachments
are inherited by the forked process that tries to do one more and fails.
Maybe you could do the attach after the exec()?  I know that it removes
some of the object-orientedness from your code, but processes in say
UNIX, do have some startup code in them anyway.

To get a picture of what is going on, use ipcs(1) command to get
interprocess communication status.

Hope this helps,
Sean




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Sean C. Landis                | {hpda, sun, uplherc}!unislc!scl
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