source: BOOK/boot/common/createfiles.xml @ 732349e

clfs-3.0.0-systemdsystemd
Last change on this file since 732349e was 732349e, checked in by Chris Staub <chris@…>, 9 years ago

Moved creation of /var/run symlink from Essential Symlinks to Creating Directories

  • Property mode set to 100644
File size: 5.6 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7
8<sect1 id="ch-boot-createfiles">
9  <?dbhtml filename="createfiles.html"?>
10
11  <title>Creating Essential Symlinks</title>
12
13  <para os="a">Some programs use hard-wired paths to files which do not exist
14  yet. In order to satisfy these programs, create a number of symbolic
15  links which will be replaced by real files throughout the course of
16  the next chapter after the software has been installed.</para>
17
18<screen os="b"><userinput>ln -sv /tools/bin/{bash,cat,echo,grep,login,pwd,stty} ${CLFS}/bin
19ln -sv /tools/bin/file ${CLFS}/usr/bin
20ln -sv /tools/lib/libgcc_s.so{,.1} ${CLFS}/usr/lib
21ln -sv /tools/lib/libstdc++.so{.6,} ${CLFS}/usr/lib
22sed -e 's/tools/usr/' /tools/lib/libstdc++.la &gt; ${CLFS}/usr/lib/libstdc++.la
23ln -sv bash ${CLFS}/bin/sh
24ln -sv /tools/sbin/init ${CLFS}/sbin
25ln -sv /tools/etc/{login.{access,defs},limits} ${CLFS}/etc</userinput></screen>
26
27  <variablelist os="c">
28    <title>The purpose of each link:</title>
29
30    <varlistentry os="c1">
31      <term><parameter><filename>/bin/bash</filename></parameter></term>
32      <listitem>
33        <para>Many <command>bash</command> scripts specify
34        <filename>/bin/bash</filename>.</para>
35      </listitem>
36    </varlistentry>
37
38    <varlistentry os="c2">
39      <term><parameter><filename>/bin/cat</filename></parameter></term>
40      <listitem>
41        <para>This pathname is hard-coded into Glibc's configure script.</para>
42      </listitem>
43    </varlistentry>
44
45    <varlistentry os="c3">
46      <term><parameter><filename>/bin/echo</filename></parameter></term>
47      <listitem>
48        <para>This is to satisfy one of the tests in Glibc's test suite, which
49        expects <filename>/bin/echo</filename>.</para>
50      </listitem>
51    </varlistentry>
52
53    <varlistentry os="c4">
54      <term><parameter><filename>/bin/grep</filename></parameter></term>
55      <listitem>
56        <para>This to avoid a hard-coded
57        <filename class="directory">/tools</filename> reference in Libtool.</para>
58      </listitem>
59    </varlistentry>
60
61    <varlistentry os="c5">
62      <term><parameter><filename>/bin/login</filename></parameter></term>
63      <listitem>
64        <para>The <command>agetty</command> program expects to find
65        <command>login</command> in <filename class="directory">/bin</filename>.</para>
66      </listitem>
67    </varlistentry>
68
69    <varlistentry os="c6">
70      <term><parameter><filename>/bin/pwd</filename></parameter></term>
71      <listitem>
72        <para>Some <command>configure</command> scripts, particularly Glibc's,
73        have this pathname hard-coded.</para>
74      </listitem>
75    </varlistentry>
76
77    <varlistentry os="c7">
78      <term><parameter><filename>/bin/stty</filename></parameter></term>
79      <listitem>
80        <para>This pathname is hard-coded into Expect, therefore it is needed
81        for Binutils and GCC test suites to pass.</para>
82      </listitem>
83    </varlistentry>
84
85    <varlistentry os="c8">
86      <term><parameter><filename>/usr/bin/file</filename></parameter></term>
87      <listitem>
88        <para>Binutils' <command>configure</command> scripts specify this
89        command location.</para>
90      </listitem>
91    </varlistentry>
92
93    <varlistentry os="c9">
94      <term><parameter><filename>/usr/lib/libgcc_s.so{,.1}</filename></parameter></term>
95      <listitem>
96        <para>Glibc needs this for the pthreads library to work.</para>
97      </listitem>
98    </varlistentry>
99
100    <varlistentry os="c10">
101      <term><parameter><filename>/usr/lib/libstdc++{,.6}</filename></parameter></term>
102      <listitem>
103        <para>This is needed by several tests in Glibc's test suite, as well as
104        for C++ support in GMP.</para>
105      </listitem>
106    </varlistentry>
107
108    <varlistentry os="c11">
109      <term><parameter><filename>/usr/lib/libstdc++.la</filename></parameter></term>
110      <listitem>
111        <para>This prevents a <filename class="directory">/tools</filename>
112        reference that would otherwise be in
113        <filename>/usr/lib/libstdc++.la</filename> after GCC is installed.</para>
114      </listitem>
115    </varlistentry>
116
117    <varlistentry os="c12">
118      <term><parameter><filename>/bin/sh</filename></parameter></term>
119      <listitem>
120        <para>Many shell scripts hard-code <filename>/bin/sh</filename>.</para>
121      </listitem>
122    </varlistentry>
123
124    <varlistentry os="c13">
125      <term><parameter><filename>/sbin/init</filename></parameter></term>
126      <listitem>
127        <para>This is where the kernel expects to find <command>init</command>.</para>
128      </listitem>
129    </varlistentry>
130
131    <varlistentry os="c14">
132      <term><parameter><filename>/etc/{login.{access,defs},limits}</filename></parameter></term>
133      <listitem>
134        <para>These are configuration files used by Shadow and are expected to
135        be found in <filename class="directory">/etc</filename>, for programs
136        such as <command>login</command> and <command>su</command> to work.</para>
137      </listitem>
138    </varlistentry>
139
140  </variablelist>
141
142  <para os="d">Historically, Linux maintains a list of the mounted file systems
143  in the file <filename>/etc/mtab</filename>. Modern kernels maintain this list
144  internally and expose it to the user via the
145  <filename class="directory">/proc</filename> filesystem. To satisfy utilities
146  that expect the presence of <filename>/etc/mtab</filename>, create the
147  following symbolic link:</para>
148
149<screen os="e"><userinput>ln -sv /proc/self/mounts ${CLFS}/etc/mtab</userinput></screen>
150
151</sect1>
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