.TH MPI_File_get_group 3 "11/12/2019" " " "MPI"
.SH NAME
MPI_File_get_group \-  Returns the group of processes that opened the file 
.SH SYNOPSIS
.nf
int MPI_File_get_group(MPI_File fh, MPI_Group * group)
.fi
.SH INPUT PARAMETERS
.PD 0
.TP
.B fh 
- file handle (handle)
.PD 1

.SH OUTPUT PARAMETERS
.PD 0
.TP
.B group 
- group that opened the file (handle)
.PD 1

.SH NOTES FOR FORTRAN
All MPI routines in Fortran (except for 
.I MPI_WTIME
and 
.I MPI_WTICK
) have
an additional argument 
.I ierr
at the end of the argument list.  
.I 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
.I call
statement.

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