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Top Forums Programming How to stop other processes and kernel from printing output on current virtual term Post 302327961 by ku@ntum on Tuesday 23rd of June 2009 04:24:30 AM
Old 06-23-2009
Question How to stop other processes and kernel from printing output on current virtual term

Hello All,

Background
========
I am creating a virtual appliance console for a software stack on VMware ESXi. I am using Centos 5.x as the Linux distro (Guest OS). I have created a ncurses based application that does the user authentication and present him with some basic controls to do basic system administration. This application will be setup to lunch automatically from mingetty as it is happening now. We have made the configuration to launch the application on tty1 automatically after each system restart.

The Issue
=======
The issue which is hindering us alot are the kernel and other processes outputs that get printed on tty1 when it is active. Well it is a normal behavior that all kernel info, warnings and error messages are goes to the current active virtual console. But this also destroy our ncurses based application UI that supposed to run all the time on the tty1.

The Question
==========
So my question is that can we in Linux (kernel:2.6, distro:Centos5.x) stop kernel and other processes to output their text to our terminal (i.e. tty1), and also redirect all the output to tty1 except ours to some other VC such as tty2.

Kindly respond anyone. We are in deep trouble due to this issue.
Thanks

Kashif Ali Siddiqui
Linux Developer
 

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cvc(7D) 							      Devices								   cvc(7D)

NAME
cvc - virtual console driver DESCRIPTION
The cvc virtual console driver is a STREAMS-based pseudo driver that supports the network console. The cvc driver interfaces with con- sole(7D). Logically, the cvc driver sits below the console driver. It redirects console output to the cvcredir(7D) driver if a network console con- nection is active. If a network console connection is not active, it redirects console output to an internal hardware interface. The cvc driver receives console input from cvcredir and internal hardware and passes it to the process associated with /dev/console. NOTES
The cvc facility supersedes the SunOS wscons(7D) facility, which should not be used in conjunction with cvc. The wscons driver is use- ful for systems with directly attached consoles (frame buffers and keyboards), but is not useful with platforms using cvc, which have no local keyboard or frame buffer. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+--------------------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+--------------------------------------+ |Architecture |Sun Enterprise 10000 servers, Sun | | |Fire 15000 servers | +--------------------+--------------------------------------+ |Availability |SUNWcvc.u | +--------------------+--------------------------------------+ SEE ALSO
cvcd(1M), attributes(5), console(7D), cvcredir(7D), wscons(7D) Sun Enterprise 10000 SSP Reference Manual Sun System Management Services (SMS) Reference Manual SunOS 5.11 15 Sep 2000 cvc(7D)
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