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6e179a9025
So if the user has not set $LFS properly, chown will do nothing instead of wreak havoc in the host distro. --from <user> has been available for Coreutils chown since 2000 so we don't need to raise the host system requirement.
42 lines
1.7 KiB
XML
42 lines
1.7 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-tools-changingowner">
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<?dbhtml filename="changingowner.html"?>
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<title>Changing Ownership</title>
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<note>
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<para>The commands in the remainder of this book must be performed while
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logged in as user <systemitem class="username">root</systemitem> and no
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longer as user <systemitem class="username">lfs</systemitem>. Also, double
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check that <envar>$LFS</envar> is set in <systemitem
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class="username">root</systemitem>'s environment.</para>
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</note>
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<para>Currently, the whole directory hierarchy in <filename
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class="directory">$LFS</filename>
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is owned by the user <systemitem class="username">lfs</systemitem>, a user
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that exists only on the host system. If the directories and files under <filename
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class="directory">$LFS</filename> are kept as they are, they will be
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owned by a user ID without a corresponding account. This is dangerous because
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a user account created later could get this same user ID and would own all
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the files under <filename class="directory">$LFS</filename>, thus exposing
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these files to possible malicious manipulation.</para>
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<para>To address this issue, change the
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ownership of the <filename class="directory">$LFS/*</filename> directories to
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user <systemitem class="username">root</systemitem> by running the following
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command:</para>
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<screen><userinput>chown --from lfs -R root:root $LFS/{usr,lib,var,etc,bin,sbin,tools}
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case $(uname -m) in
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x86_64) chown --from lfs -R root:root $LFS/lib64 ;;
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esac</userinput></screen>
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</sect1>
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