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# PetscFPrintf
Prints to a file, only from the first MPI process in the communicator. 
## Synopsis
```
PetscErrorCode PetscFPrintf(MPI_Comm comm, FILE *fd, const char format[], ...)
```
Not Collective; No Fortran Support


## Input Parameters

- ***comm -*** the MPI communicator
- ***fd -*** the file pointer
- ***format -*** the usual `printf()` format string





## Developer Note
This maybe, and is, called from PETSc error handlers and `PetscMallocValidate()` hence it does not use `PetscCallMPI()` which
could recursively restart the malloc validation.


## See Also
 `PetscPrintf()`, `PetscSynchronizedPrintf()`, `PetscViewerASCIIPrintf()`,
`PetscViewerASCIISynchronizedPrintf()`, `PetscSynchronizedFlush()`, `PetscFFlush()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/fileio/mprint.c.html#PetscFPrintf">src/sys/fileio/mprint.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex18.c.html">src/ksp/ksp/tutorials/ex18.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex2.c.html">src/ksp/ksp/tutorials/ex2.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex42.c.html">src/ksp/ksp/tutorials/ex42.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex43.c.html">src/ksp/ksp/tutorials/ex43.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex46.c.html">src/ksp/ksp/tutorials/ex46.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex49.c.html">src/ksp/ksp/tutorials/ex49.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex52.c.html">src/ksp/ksp/tutorials/ex52.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/fileio/mprint.c)


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