diff options
Diffstat (limited to 'chapter06/devices.xml')
| -rw-r--r-- | chapter06/devices.xml | 39 |
1 files changed, 5 insertions, 34 deletions
diff --git a/chapter06/devices.xml b/chapter06/devices.xml index dc5de88b8..c432fa86b 100644 --- a/chapter06/devices.xml +++ b/chapter06/devices.xml @@ -7,33 +7,16 @@ <title>Populating /dev</title> <?dbhtml filename="devices.html"?> -<indexterm zone="ch-system-devices"><primary sortas="e-Devices">Devices</primary></indexterm> - -<sect2> -<title>Creating initial device nodes</title> - -<para>When the kernel boots the system, it requires the presence of a few device -nodes, in particular the <filename class="devicefile">console</filename> and -<filename class="devicefile">null</filename> devices:</para> +<para>Create the initial device nodes</para> <screen><userinput>mknod -m 600 /dev/console c 5 1 mknod -m 666 /dev/null c 1 3</userinput></screen> -</sect2> - -<sect2> -<title>Mounting ramfs and populating /dev</title> -<para>The ideal way to populate <filename class="directory">/dev</filename> is -to mount a <systemitem class="filesystem">ramfs</systemitem> onto <filename class="directory">/dev </filename> -like <systemitem class="filesystem">tmpfs</systemitem>, but it -cannot be swapped) and create the devices on there during each bootup. Since we haven't -booted the system, we have to do what the bootscripts would otherwise do for us, and -populate <filename class="directory">/dev</filename> ourselves. Begin by mounting <filename class="directory">/dev</filename>:</para> +<para>Mount a ramfs in /dev</para> <screen><userinput>mount -n -t ramfs none /dev</userinput></screen> -<para>Since we do not have the Udev package installed yet, we'll create a -minimal set of device nodes to use for building:</para> +<para>Create a minimal set of device nodes:</para> <screen><userinput>mknod -m 622 /dev/console c 5 1 mknod -m 666 /dev/null c 1 3 @@ -44,8 +27,7 @@ mknod -m 444 /dev/random c 1 8 mknod -m 444 /dev/urandom c 1 9 chown root:tty /dev/{console,ptmx,tty}</userinput></screen> -<para>There are some symlinks and directories required by LFS that are not created by -Udev, so we create those ourselves here:</para> +<para>Create some symlinks and directories:</para> <screen><userinput>ln -s /proc/self/fd /dev/fd ln -s /proc/self/fd/0 /dev/stdin @@ -55,21 +37,10 @@ ln -s /proc/kcore /dev/core mkdir /dev/pts mkdir /dev/shm</userinput></screen> -<para>Finally, mount the proper virtual (kernel) file systems on the directories we just -created:</para> +<para>Mount the virtual file systems:</para> <screen><userinput>mount -t devpts -o gid=4,mode=620 none /dev/pts mount -t tmpfs none /dev/shm</userinput></screen> -<para>The <command>mount</command> commands executed above may result in the -following warning message:</para> - -<screen><computeroutput>can't open /etc/fstab: No such file or directory.</computeroutput></screen> - -<para>This file—<filename>/etc/fstab</filename>—has not -been created yet but is also not required for the file systems to be -properly mounted. As such, the warning can be safely ignored.</para> -</sect2> - </sect1> |