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<A NAME="PetscFOpen"><H1>PetscFOpen</H1></A>
Has the first process in the communicator open a file; all others do nothing.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
int PetscFOpen(MPI_Comm comm,const char name[],const char mode[],FILE **fp)
</PRE>
Collective on MPI_Comm
<P>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B><A HREF="../Sys/comm.html#comm">comm</A> </B></TD><TD>- the communicator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>name </B></TD><TD>- the filename
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mode </B></TD><TD>- the mode for fopen(), usually "w"
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>fp </B> -the file pointer
<br>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
PETSC_NULL (0), "stderr" or "stdout" may be passed in as the filename
<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="../Sys/PetscFClose.html#PetscFClose">PetscFClose</A>()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/sys/src/fileio/mpiuopen.c.html#PetscFOpen">src/sys/src/fileio/mpiuopen.c</A>
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