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<TITLE>PetscViewerBinaryGetDescriptor</TITLE>
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<A NAME="PetscViewerBinaryGetDescriptor"><H1>PetscViewerBinaryGetDescriptor</H1></A>
Extracts the file descriptor from a <A HREF="../Viewer/PetscViewer.html#PetscViewer">PetscViewer</A>.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petsc.h"
int PetscViewerBinaryGetDescriptor(PetscViewer viewer,int *fdes)
</PRE>
Not Collective
<P>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>viewer </B></TD><TD>- <A HREF="../Viewer/PetscViewer.html#PetscViewer">PetscViewer</A> context, obtained from <A HREF="../Viewer/PetscViewerBinaryOpen.html#PetscViewerBinaryOpen">PetscViewerBinaryOpen</A>()
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>fdes </B></TD><TD>- file descriptor
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
For writable binary <A HREF="../Viewer/PetscViewers.html#PetscViewers">PetscViewers</A>, the descriptor will only be valid for the
first processor in the communicator that shares the <A HREF="../Viewer/PetscViewer.html#PetscViewer">PetscViewer</A>. For readable
files it will only be valid on nodes that have the file. If node 0 does not
have the file it generates an error even if another node does have the file.
<P>
<H3><FONT COLOR="#CC3333">Fortran Note</FONT></H3>
This routine is not supported in Fortran.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Viewer/PetscViewerBinaryOpen.html#PetscViewerBinaryOpen">PetscViewerBinaryOpen</A>(),<A HREF="../Viewer/PetscViewerBinaryGetInfoPointer.html#PetscViewerBinaryGetInfoPointer">PetscViewerBinaryGetInfoPointer</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/viewer/impls/binary/binv.c.html#PetscViewerBinaryGetDescriptor">src/sys/src/viewer/impls/binary/binv.c</A>
<BR><A HREF="./index.html">Index of all Viewer routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/vec/examples/tutorials/ex6.c.html">src/vec/examples/tutorials/ex6.c.html</A><BR>
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