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MPI_File_get_group(3) man page (version 1.4.5)

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MPI_File_get_group - Returns a duplicate of the process group of a file.


C Syntax
    #include <mpi.h>
    int MPI_File_get_group(MPI_File fh, MPI_Group *group)

Fortran Syntax

    INCLUDE ’mpif.h’
             INTEGER      FH, GROUP, IERROR

C++ Syntax

#include <mpi.h>
MPI::Group MPI::File::Get_group() const

Input Parameter

File handle (handle).

Output Parameters

Group that opened the file (handle).
Fortran only: Error status (integer).


MPI_File_get_group returns a duplicate of the group of the communicator used to open the file associated with fh. The group is returned in group. The user is responsible for freeing group, using MPI_Group_free.


Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object.

Before the error value is returned, the current MPI error handler is called. For MPI I/O function errors, the default error handler is set to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.

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