11-14-2003
"It is intented to test the communication with a serial device. It has not been written to use the tty interface. Unfortunately, I don't know what this means."
Those first two sentences probably cannot be true at the same time. And this is probably the crux of your problem. It is probably trying to configure the tty to set baud rate, parity, flow control and stuff like that. The tty driver controls an interface that is indeed serial. And one of the options is how end of file is indicated.
What kind of serial device would the app normally talk to? And where does the user come in? Is the serial device a a terminal with a keyboard?
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LEARN ABOUT OSX
mpi_comm_disconnect
MPI_Comm_disconnect(3OpenMPI) MPI_Comm_disconnect(3OpenMPI)
NAME
MPI_Comm_disconnect - Deallocates communicator object and sets handle to MPI_COMM_NULL.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_Comm_disconnect(MPI_Comm *comm)
Fortran Syntax
INCLUDE 'mpif.h'
MPI_COMM_DISCONNECT(COMM, IERROR)
INTEGER COMM, IERROR
C++ Syntax
#include <mpi.h>
void MPI::Comm::Disconnect()
INPUT
/OUTPUT PARAMETER
comm Communicator (handle).
OUTPUT PARAMETER
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_Comm_disconnect waits for all pending communication on comm to complete internally, deallocates the communicator object, and sets the
handle to MPI_COMM_NULL. It is a collective operation.
It may not be called with the communicator MPI_COMM_WORLD or MPI_COMM_SELF.
MPI_Comm_disconnect may be called only if all communication is complete and matched, so that buffered data can be delivered to its destina-
tion. This requirement is the same as for MPI_Finalize.
MPI_Comm_disconnect has the same action as MPI_Comm_free, except that it waits for pending communication to finish internally and enables
the guarantee about the behavior of disconnected processes.
NOTES
To disconnect two processes you may need to call MPI_Comm_disconnect, MPI_Win_free, and MPI_File_close to remove all communication paths
between the two processes. Note that it may be necessary to disconnect several communicators (or to free several windows or files) before
two processes are completely independent.
ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI:Exception object.
Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for
I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be
used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.
SEE ALSO
MPI_Comm_connect
MPI_Comm_accept
Open MPI 1.2 September 2006 MPI_Comm_disconnect(3OpenMPI)