apr_shm_attach() and APR_EEXIST

[Graham Leggett]

Hi all,
I am currently trying to figure out how this piece of code is going pear 
shaped:

    result = apr_shm_create(&st->cache_shm, st->cache_bytes, 
st->cache_file, st->pool);
    if (result == APR_EEXIST) {
        result = apr_shm_attach(&st->cache_shm, st->cache_file, st->pool);
    }
    if (result != APR_SUCCESS) {
        return result;
    }

When this code is run, apr_shm_create() returns APR_EEXIST, even when 
the file does not exist.

Then, apr_shm_attach() returns 70014, which seems to correspond to 
APR_EGENERAL. The apr docs don't mention return codes, so I have no idea 
if this is normal or not.

At the end of this, the shared memory segment file appears to be 
created, but with a length of zero.

Can anyone explain how I can get an APR_SUCCESS out of the above? I am 
stumped.

Regards,
Graham
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