NAME

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

SYNTAX

C Syntax

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

Fortran Syntax

       USE MPI
       ! or the older form: INCLUDE 'mpif.h'
       MPI_FILE_GET_GROUP(FH, GROUP, IERROR)
            INTEGER   FH, GROUP, IERROR

Fortran 2008 Syntax

       USE mpi_f08
       MPI_File_get_group(fh, group, ierror)
            TYPE(MPI_File), INTENT(IN) :: fh
            TYPE(MPI_Group), INTENT(OUT) :: group
            INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

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

INPUT PARAMETER

       fh        File handle (handle).

OUTPUT PARAMETERS

       group     Group that opened the file (handle).

       IERROR    Fortran only: Error status (integer).

DESCRIPTION

       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.

ERRORS

       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.