It seems Linux only supports anonymous shared memory, as if a filename is provided apr_shm_create() returns APR_EEXIST, and apr_shm_attach() returns APR_EGENERAL. Is this correct?
[ With my little knowledge :) ]
I don't think that's a case.
Normally EEXIST is returned when CREATE and EXCL flags are combined.
So I guess you are trying to create segment which is already there. check with ipcs
whether you have orphan segments ('cause of some reasons)
What are values for these constants in your apr.h (method to use for SHM)
APR_USE_SHMEM_MMAP_TMP APR_USE_SHMEM_MMAP_SHM APR_USE_SHMEM_MMAP_ZERO APR_USE_SHMEM_SHMGET_ANON APR_USE_SHMEM_SHMGET APR_USE_SHMEM_MMAP_ANON
Regards Amit
