MPI_Lookup_name(3)                  LAM/MPI                 MPI_Lookup_name(3)



NAME
       MPI_Lookup_name -  Lookup a previously published name

SYNOPSIS
       #include <mpi.h>
       int
       MPI_Unpublish_name(char *service_name, MPI_Info info, char *port_name)

INPUT PARAMETERS
       service_name
              - a service name
       info   - implementation-specific information
       port_name
              - a port name from MPI_Open_port



NOTES
       Currently, LAM/MPI ignores any info keys that are passed to this
       function.  As such, info keys specific to a different implementation
       can safely be passed to this function.  Additionally, the MPI constant
       MPI_INFO_NULL can also be used.

       The scope of the published name is the LAM universe -- MPI processes
       running on any node included from the initial lamboot are capable of
       retrieving a name published by MPI_Publish_name
        .  Service names stay in existence until they are either manually
       removed with MPI_Unpublish_name or cleaned with the lamclean command.
       It is a common mistake to forget to MPI_Unpublish_name at the end of a
       run, and therefore leave published names in the LAM runtime
       environment.


NOTES FOR FORTRAN
       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have
       an additional argument ierr at the end of the argument list.  ierr is
       an integer and has the same meaning as the return value of the routine
       in C.  In Fortran, MPI routines are subroutines, and are invoked with
       the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in
       Fortran.


ERRORS
       If an error occurs in an MPI function, the current MPI error handler is
       called to handle it.  By default, this error handler aborts the MPI
       job.  The error handler may be changed with MPI_Errhandler_set ; the
       predefined error handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned (in C and Fortran; this error handler is less
       useful in with the C++ MPI bindings.  The predefined error handler
       MPI::ERRORS_THROW_EXCEPTIONS should be used in C++ if the error value
       needs to be recovered).  Note that MPI does not guarantee that an MPI
       program can continue past an error.

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error
       value; C routines as the value of the function and Fortran routines in
       the last argument.  The C++ bindings for MPI do not return error
       values; instead, error values are communicated by throwing exceptions
       of type MPI::Exception (but not by default).  Exceptions are only
       thrown if the error value is not MPI::SUCCESS
        .

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI
       functions will return upon an error, there will be no way to recover
       what the actual error value was.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_ARG
              - Invalid argument.  Some argument is invalid and is not
              identified by a specific error class.  This is typically a NULL
              pointer or other such error.
       MPI_ERR_SERVICE
              - This error class is associated with an error code that
              indicates that there was a problem with the service name that
              was used.  Depending on the context, this can indicate that the
              service name was already published or that the service name was
              not yet published.


SEE ALSO
       MPI_Lookup_name, MPI_Publish_name


MORE INFORMATION
       For more information, please see the official MPI Forum web site, which
       contains the text of both the MPI-1 and MPI-2 standards.  These
       documents contain detailed information about each MPI function (most of
       which is not duplicated in these man pages).

       http://www.mpi-forum.org/

LOCATION
       nameunpub.c



LAM/MPI 6.5.9                      1/27/2003                MPI_Lookup_name(3)
