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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/Sys/PetscSharedWorkingDirectory.html "><small>Report Typos and Errors</small></a></div>
<A NAME="PetscSharedWorkingDirectory"><H1>PetscSharedWorkingDirectory</H1></A>
Determines if all processors in a communicator share a working directory or have different ones.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Sys/PetscSharedWorkingDirectory.html#PetscSharedWorkingDirectory">PetscSharedWorkingDirectory</A>(<A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</A> comm,<A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *shared)
</PRE>
Collective
<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>comm </B></TD><TD>- MPI_Communicator that may share working directory
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>shared </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> or <A HREF="../Sys/PETSC_FALSE.html#PETSC_FALSE">PETSC_FALSE</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-shared_working_directory</B></TD>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-not_shared_working_directory</B></TD></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Environmental Variables</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>PETSC_SHARED_WORKING_DIRECTORY</B></TD>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>PETSC_NOT_SHARED_WORKING_DIRECTORY</B></TD></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
Stores the status as a MPI attribute so it does not have
to be redetermined each time.
<P>
Assumes that all processors in a communicator either
1) have a common working directory or
2) each has a separate working directory
eventually we can write a fancier one that determines which processors
share a common working directory.
<P>
This will be very slow on runs with a large number of processors since
it requires O(p*p) file opens.
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/sys/fileio/fretrieve.c.html#PetscSharedWorkingDirectory">src/sys/fileio/fretrieve.c</A>
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