| 1 | <sect1 id="ch06-proc">
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| 2 | <title>Mounting the proc and devpts file systems</title>
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| 3 | <?dbhtml filename="proc.html" dir="chapter06"?>
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| 4 |
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| 5 | <para>In order for certain programs to function properly, the proc and devpts
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| 6 | file systems must be available within the chroot environment.
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| 7 | As a file system can be mounted as many times and in as many places
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| 8 | as you like, it's not a problem that the these file systems are already
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| 9 | mounted on your host system -- especially so because they are virtual
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| 10 | file systems.</para>
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| 11 |
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| 12 | <para>The proc file system is mounted under
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| 13 | <filename class="directory">/proc</filename> by running the
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| 14 | following command:</para>
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| 15 |
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| 16 | <para><screen><userinput>mount proc /proc -t proc</userinput></screen></para>
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| 17 |
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| 18 | <para>The devpts file system is mounted to <filename class="directory">/dev/pts
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| 19 | </filename> by running:</para>
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| 20 |
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| 21 | <para><screen><userinput>mount devpts /dev/pts -t devpts</userinput></screen>
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| 22 | </para>
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| 23 |
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| 24 | <para>Should this command fail with an error to the effect of:</para>
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| 25 |
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| 26 | <blockquote><screen>filesystem devpts not supported by kernel</screen></blockquote>
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| 27 |
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| 28 | <para>This most likely means that your host system uses devfs, and does not
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| 29 | have the necessary support for devpts in the kernel. To work around this
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| 30 | problem, we will place the host's devfs system on top of the new /dev
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| 31 | structure later, in the section where we run the MAKEDEV script.</para>
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| 32 |
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| 33 | <para>You might get warning messages from the mount command, such as
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| 34 | these:</para>
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| 35 |
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| 36 | <blockquote><screen>warning: can't open /etc/fstab: No such file or directory
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| 37 | not enough memory</screen></blockquote>
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| 38 |
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| 39 | <para>Ignore these, they're just due to the fact that the system
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| 40 | isn't installed completely yet and some files are missing. The mount itself
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| 41 | will be successful and that's all we care about at this point.</para>
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| 42 |
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| 43 | <para>The last error (not enough memory) doesn't always show up. It depends
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| 44 | on your system configuration (such as the host system's Glibc version that was
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| 45 | used to compile the mount program with).</para>
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| 46 |
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| 47 | <para>Remember, if for any reason you stop working on your LFS, and
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| 48 | start again later, it's important to check that these filesystems are still
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| 49 | mounted inside the chroot environment. Otherwise, some programs might
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| 50 | end up compiled incorrectly.</para>
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| 51 |
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| 52 | </sect1>
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| 53 |
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