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List:       kde-devel
Subject:    KProcess and stdout/stderr!
From:       Tim Lee <tlee () tc ! fluke ! com>
Date:       2001-10-29 20:41:39
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Hi,

I'm using KProcess to run a command that creates interleaved
output from stdout and stderr, example follows:

stdout: Cisco Systems VPN Client Version 3.0.8
stdout: Copyright (C) 1998-2001 Cisco Systems, Inc. All Rights Reserved.
stdout: Client Type(s): Linux
stdout: Running on: Linux 2.4.9-6 #1 Thu Oct 18 09:39:55 EDT 2001 i686
stdout: 
stdout: Initializing the IPSec link.
stderr: 
stderr: initialization failed
stdout: Disconnecting the IPSEC link.
stdout: The VPN sub-system is busy or has failed.

The lines are marked by the file descriptor they were written
to.

When I use KProcess and the established UNIX sockets I get the
following when I display it as the command runs:

stderr: 
stderr: initialization failed
stdout: Cisco Systems VPN Client Version 3.0.8
stdout: Copyright (C) 1998-2001 Cisco Systems, Inc. All Rights Reserved.
stdout: Client Type(s): Linux
stdout: Running on: Linux 2.4.9-6 #1 Thu Oct 18 09:39:55 EDT 2001 i686
stdout: 
stdout: Initializing the IPSec link.
stdout: Disconnecting the IPSEC link.
stdout: The VPN sub-system is busy or has failed.

I believe this is because the stdout is no longer attached to
a tty and therefore is buffered.  I get none of the stdout
stuff until the command is finishing.  The command in question is
a binary only so I can't alter it.

Any ideas how to remove the buffering on stdout, assuming that
is the problem?

Thanks,
-- 
Tim Lee
R&D Design Engineer
Fluke Networks
6805 Corporate Drive, Suite 100
Colorado Springs, CO 80919
www.flukenetworks.com
 
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