mirror of https://github.com/tLDP/LDP
72 lines
2.7 KiB
XML
72 lines
2.7 KiB
XML
<sect1 id="ch06-makedev">
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<title>Creating devices (Makedev-&makedev-version;)</title>
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<?dbhtml filename="makedev.html" dir="chapter06"?>
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<screen>Estimated build time: &makedev-time;
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Estimated required disk space: &makedev-compsize;</screen>
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&aa-makedev-shortdesc;
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&aa-makedev-dep;
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<sect2><title> </title><para> </para></sect2>
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<sect2>
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<title>Creating devices</title>
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<para>Note that unpacking the <filename>MAKEDEV-&makedev-version;.bz2</filename>
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file doesn't create a directory for you to <userinput>cd</userinput> into, as
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the file contains only a shell script.</para>
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<para>Install the <userinput>MAKEDEV</userinput> script:</para>
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<screen><userinput>bzcat MAKEDEV-&makedev-version;.bz2 > /dev/MAKEDEV
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chmod 754 /dev/MAKEDEV</userinput></screen>
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<para>Run the script to create the device files:</para>
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<screen><userinput>cd /dev
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./MAKEDEV -v generic-nopty</userinput></screen>
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<para>The meaning of the arguments:</para>
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<itemizedlist>
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<listitem><para><userinput>-v</userinput>: This tells the script to run in
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verbose mode.</para></listitem>
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<listitem><para><userinput>generic-nopty</userinput>: This instructs
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<userinput>MAKEDEV</userinput> to create a generic selection of commonly used
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device special files, except for the ptyXX and ttyXX range of files. We don't
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need those files because we are going to use Unix98 PTYs via the
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<emphasis>devpts</emphasis> file system.</para></listitem>
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</itemizedlist>
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<para>If it turns out that some special device <filename>zzz</filename> that
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you need is missing, try running <userinput>./MAKEDEV -v zzz</userinput>.
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Alternatively, you may create devices via the <userinput>mknod</userinput>
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program. Please refer to its man and info pages if you need more
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information.</para>
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<para>Additionally, if you were unable to mount the devpts filesystem earlier in
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the "Mounting the proc and devpts file systems" section, now is the time to
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try the alternatives. If your kernel supports the devfs file system, run the
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following command to mount devfs:</para>
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<screen><userinput>mount -t devfs devfs /dev</userinput></screen>
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<para>This will mount the devfs file system over the top of the new static
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<filename>/dev</filename> structure. This poses no problems, as the device nodes
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created are still present, they are just hidden by the new devfs
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filesystem.</para>
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<para>If this still doesn't work, the only option left is to use the MAKEDEV
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script to create the ptyXX and ttyXX range of files that would otherwise not be
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needed. Ensure you are still in the <filename>/dev</filename> directory then run
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<userinput>./MAKEDEV -v pty</userinput>. The downside of this is, we are
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creating an extra 512 device special files which will not be needed when we
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finally boot into the finished LFS system.</para>
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</sect2>
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</sect1>
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