Verify the attributes being used to read a link
#include <sys/iofunc.h> int iofunc_readlink( resmgr_context_t *ctp, io_readlink_t *msg, iofunc_attr_t *attr, struct _client_info *info );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The iofunc_readlink() helper function supports readlink() requests by verifying that attr isn't NULL, and that it refers to a symbolic link.
_io_connect, _io_connect_link_reply, _io_connect_ftype_reply, iofunc_open(), readlink()
Writing a Resource Manager
Resource Managers chapter of Getting Started with QNX Neutrino