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       XPAOpen -  allocate a persistent client handle


         #include <xpa.h>

         XPA XPAOpen(char *mode);


       XPAOpen() allocates a persistent XPA struct that can be used with calls
       to XPAGet(), XPASet(), XPAInfo(), XPAGetFd(), and XPASetFd().
       Persistence means that a connection to an XPA server is not closed when
       one of the above calls is completed but will be re-used on successive
       calls. Using XPAOpen() therefore saves the time it takes to connect to
       a server, which could be significant with slow connections or if there
       will be a large number of exchanges with a given access point.  The
       mode argument currently is ignored ("reserved for future use").

       An XPA struct is returned if XPAOpen() was successful; otherwise NULL
       is returned. This returned struct can be passed as the first argument
       to XPAGet(), etc.  Those calls will update the list of active XPA
       connections.  Already connected servers (from a previous call) are left
       connected and new servers also will be connected.  Old servers (from a
       previous call) that are no longer needed are disconnected.  The
       connected servers will remain connected when the next call to XPAGet()
       is made and connections are once again updated.

       Example -

        #include <xpa.h>

         XPA xpa;
         xpa = XPAOpen(NULL);


       See xpa(7) for a list of XPA help pages

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