petsc-3.14.5 2021-03-03
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# DMGetOptionsPrefix

Gets the prefix used for searching for all DM options in the database.

### Synopsis

    #include "petscdm.h"
    #include "petscdmlabel.h"
    #include "petscds.h"
    PetscErrorCode  DMGetOptionsPrefix(DM dm,const char *prefix[])

Not Collective

### Input Parameters

| dm | - the DM context

### Output Parameters

| prefix | - pointer to the prefix string used is returned

### Notes

On the fortran side, the user should pass in a string 'prefix' of sufficient length to hold the prefix.

### See Also

DMSetOptionsPrefix(), DMAppendOptionsPrefix()

### Level

advanced

### Location

src/dm/interface/dm.c
Index of all DM routines
Table of Contents for all manual pages
Index of all manual pages