This function is currently only available in QNX 4. It attempts to remove the shared object, share_name. If more than one process or link into the shared memory area exists the shared object will not be removed.
Possible values of errno are:
EACCESS Permission to unlink the object is denied
ENAMETOOLONG The lenght of the name of the object is too long
ENOENT The named shared memory object does not exist.
ENOSYS This function is not supported by this implementation.
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