178 lines
2.9 KiB
HTML
178 lines
2.9 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Special kerneld uses</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.52"><LINK
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REL="HOME"
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TITLE="Linux kerneld mini-HOWTO"
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HREF="index.html"><LINK
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REL="PREVIOUS"
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TITLE="Spying on kerneld"
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HREF="spying.html"><LINK
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REL="NEXT"
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TITLE="Common problems and things that make you wonder"
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HREF="commonproblems.html"></HEAD
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><TR
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>Linux kerneld mini-HOWTO</TH
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><TR
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><TD
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WIDTH="10%"
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>Prev</A
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="GOODIES"
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>Special kerneld uses</A
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></H1
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><P
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>I knew you would ask about how to setup the screen-saver
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module!</P
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><P
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>The <TT
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CLASS="FILENAME"
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>kerneld/GOODIES</TT
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> directory in
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modules package has a couple of kernel patches for screen-saver
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and console-beep support in kerneld; these are not yet part of
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the official kernel, so you will need to install the
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kernel-patches and rebuild the kernel. </P
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><P
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>To install a patch, you use the patch command: </P
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><TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><PRE
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CLASS="SCREEN"
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> cd /usr/src/linux
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patch -s -p1 /usr/src/modules-*/kerneld/GOODIES/blanker_patch</PRE
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></TD
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></TR
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></TABLE
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><P
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>Then rebuild and install the new kernel. </P
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><P
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>When the screen-saver triggers, kerneld will run the
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command <TT
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CLASS="FILENAME"
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>/sbin/screenblanker</TT
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>; this file may
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be anything you like, for example, a shell script that runs your
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favorite screen-saver. </P
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><P
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>When the kernel wants to unblank the screen, it sends a
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<SPAN
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CLASS="TOKEN"
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>SIGQUIT</SPAN
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> signal to the process running
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<TT
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CLASS="FILENAME"
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>/sbin/screenblanker</TT
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>. Your shell script or
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screen-saver should trap this, and terminate. Remember to restore
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the screen to the original text mode! </P
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HREF="spying.html"
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>Prev</A
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>Home</A
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HREF="commonproblems.html"
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>Next</A
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><TD
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WIDTH="33%"
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VALIGN="top"
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>Spying on kerneld</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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> </TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Common problems and things that make you wonder</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |