source: chapter06/libcap.xml@ d9447c15

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Last change on this file since d9447c15 was d9447c15, checked in by Bruce Dubbs <bdubbs@…>, 21 months ago

Update to libcap-2.32.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11772 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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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-system-libcap" role="wrap">
9 <?dbhtml filename="libcap.html"?>
10
11 <sect1info condition="script">
12 <productname>libcap</productname>
13 <productnumber>&libcap-version;</productnumber>
14 <address>&libcap-url;</address>
15 </sect1info>
16
17 <title>Libcap-&libcap-version;</title>
18
19 <indexterm zone="ch-system-libcap">
20 <primary sortas="a-Libcap">Libcap</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Libcap package implements the user-space interfaces to the POSIX
27 1003.1e capabilities available in Linux kernels. These capabilities are a
28 partitioning of the all powerful root privilege into a set of distinct
29 privileges.</para>
30
31 <segmentedlist>
32 <segtitle>&buildtime;</segtitle>
33 <segtitle>&diskspace;</segtitle>
34
35 <seglistitem>
36 <seg>&libcap-ch6-sbu;</seg>
37 <seg>&libcap-ch6-du;</seg>
38 </seglistitem>
39 </segmentedlist>
40
41 </sect2>
42
43 <sect2 role="installation">
44 <title>Installation of Libcap</title>
45
46 <para>Prevent a static library from being installed:</para>
47
48<screen><userinput remap="pre">sed -i '/install.*STACAPLIBNAME/d' libcap/Makefile</userinput></screen>
49
50 <para>Compile the package:</para>
51
52<screen><userinput remap="make">make lib=lib</userinput></screen>
53
54 <variablelist>
55 <title>The meaning of the make option:</title>
56
57 <varlistentry>
58 <term><parameter>lib=lib</parameter></term>
59 <listitem>
60 <para>This parameter sets the library directory to
61 <filename>/lib</filename> rather than
62 <filename>/lib64</filename> on x86_64. It has no effect on
63 x86.</para>
64 </listitem>
65 </varlistentry>
66 </variablelist>
67
68 <para>To test the results, issue:</para>
69
70<screen><userinput remap="test">make test</userinput></screen>
71
72 <para>Install the package and do some cleanup:</para>
73
74<screen><userinput remap="install">make lib=lib install
75chmod -v 755 /lib/libcap.so.&libcap-version;
76mv -v /lib/libpsx.a /usr/lib
77rm -v /lib/libcap.so
78ln -sfv ../../lib/libcap.so.2 /usr/lib/libcap.so</userinput></screen>
79
80 </sect2>
81
82 <sect2 id="contents-libcap" role="content">
83 <title>Contents of Libcap</title>
84
85 <segmentedlist>
86 <segtitle>Installed programs</segtitle>
87 <segtitle>Installed library</segtitle>
88
89 <seglistitem>
90 <seg>capsh, getcap, getpcaps, and setcap</seg>
91 <seg>libcap.so and libpsx.a</seg>
92 </seglistitem>
93 </segmentedlist>
94
95 <variablelist>
96 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
97 <?dbfo list-presentation="list"?>
98 <?dbhtml list-presentation="table"?>
99
100 <varlistentry id="capsh">
101 <term><command>capsh</command></term>
102 <listitem>
103 <para>A shell wrapper to explore and constrain capability support</para>
104 <indexterm zone="ch-system-libcap capsh">
105 <primary sortas="b-capsh">capsh</primary>
106 </indexterm>
107 </listitem>
108 </varlistentry>
109
110 <varlistentry id="getcap">
111 <term><command>getcap</command></term>
112 <listitem>
113 <para>Examines file capabilities</para>
114 <indexterm zone="ch-system-libcap getcap">
115 <primary sortas="b-getcap">getcap</primary>
116 </indexterm>
117 </listitem>
118 </varlistentry>
119
120 <varlistentry id="getpcaps">
121 <term><command>getpcaps</command></term>
122 <listitem>
123 <para>Displays the capabilities on the queried process(es)</para>
124 <indexterm zone="ch-system-libcap getpcaps">
125 <primary sortas="b-getpcaps">getpcaps</primary>
126 </indexterm>
127 </listitem>
128 </varlistentry>
129
130 <varlistentry id="setcap">
131 <term><command>setcap</command></term>
132 <listitem>
133 <para>Sets file capabilities</para>
134 <indexterm zone="ch-system-libcap setcap">
135 <primary sortas="b-setcap">setcap</primary>
136 </indexterm>
137 </listitem>
138 </varlistentry>
139
140 <varlistentry id="libcap">
141 <term><filename class="libraryfile">libcap</filename></term>
142 <listitem>
143 <para>Contains the library functions for manipulating POSIX 1003.1e
144 capabilities</para>
145 <indexterm zone="ch-system-libcap libcap">
146 <primary sortas="c-libcap">libcap</primary>
147 </indexterm>
148 </listitem>
149 </varlistentry>
150
151 <varlistentry id="libpsx">
152 <term><filename class="libraryfile">libpsx</filename></term>
153 <listitem>
154 <para>Contains functions to support POSIX semantics for syscalls
155 associated with the pthread library</para>
156 <indexterm zone="ch-system-libcap libpsx">
157 <primary sortas="c-libpsx">libpsx</primary>
158 </indexterm>
159 </listitem>
160 </varlistentry>
161
162 </variablelist>
163
164 </sect2>
165
166</sect1>
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