PETSc version 3.16.5
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# PetscBinaryOpen

Opens a PETSc binary file.

### Synopsis

    PetscErrorCode  PetscBinaryOpen(const char name[],PetscFileMode mode,int *fd)

Not Collective

### Input Parameters

| name | - filename
| mode | - open mode of binary file, one of FILE_MODE_READ, FILE_MODE_WRITE, FILE_MODE_APPEND

### Output Parameter

| fd | - the file

### Notes

Files access with PetscBinaryRead() and PetscBinaryWrite() are ALWAYS written in big-endian format. This means the file can be accessed using PetscBinaryOpen() and PetscBinaryRead() and PetscBinaryWrite() on any machine.

### See Also

PetscBinaryRead(), PetscBinaryWrite(), PetscFileMode, PetscViewerFileSetMode(), PetscViewerBinaryGetDescriptor(),
PetscBinarySynchronizedWrite(), PetscBinarySynchronizedRead(), PetscBinarySynchronizedSeek()

### Level

advanced

### Location

src/sys/fileio/sysio.c

### Examples

src/dm/tutorials/ex15.c.html
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