[1fa2099] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| 8 | <sect1 id="ch-system-libcap" role="wrap">
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| 9 | <?dbhtml filename="libcap.html"?>
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| 10 |
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| 11 | <sect1info condition="script">
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| 12 | <productname>libcap</productname>
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| 13 | <productnumber>&libcap-version;</productnumber>
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| 14 | <address>&libcap-url;</address>
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| 15 | </sect1info>
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| 16 |
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| 17 | <title>Libcap-&libcap-version;</title>
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| 18 |
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| 19 | <indexterm zone="ch-system-libcap">
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| 20 | <primary sortas="a-Libcap">Libcap</primary>
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| 21 | </indexterm>
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| 22 |
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| 23 | <sect2 role="package">
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| 24 | <title/>
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| 25 |
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| 26 | <para>The Libcap package implements the user-space interfaces to the POSIX
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| 27 | 1003.1e capabilities available in Linux kernels. These capabilities are a
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| 28 | partitioning of the all powerful root privilege into a set of distinct
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| 29 | privileges.</para>
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| 30 |
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| 31 | <segmentedlist>
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| 32 | <segtitle>&buildtime;</segtitle>
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| 33 | <segtitle>&diskspace;</segtitle>
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| 34 |
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| 35 | <seglistitem>
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[37e35d2] | 36 | <seg>&libcap-fin-sbu;</seg>
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| 37 | <seg>&libcap-fin-du;</seg>
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[1fa2099] | 38 | </seglistitem>
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| 39 | </segmentedlist>
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| 40 |
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| 41 | </sect2>
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| 42 |
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| 43 | <sect2 role="installation">
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| 44 | <title>Installation of Libcap</title>
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| 45 |
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[9f62bc3] | 46 | <para>Prevent static libraries from being installed:</para>
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[1fa2099] | 47 |
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[9f62bc3] | 48 | <screen><userinput remap="pre">sed -i '/install -m.*STA/d' libcap/Makefile</userinput></screen>
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[1fa2099] | 49 |
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| 50 | <para>Compile the package:</para>
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| 51 |
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[5e06d04] | 52 | <screen><userinput remap="make">make prefix=/usr lib=lib</userinput></screen>
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[1fa2099] | 53 |
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| 54 | <variablelist>
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| 55 | <title>The meaning of the make option:</title>
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| 56 |
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| 57 | <varlistentry>
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| 58 | <term><parameter>lib=lib</parameter></term>
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| 59 | <listitem>
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[f8ea68b] | 60 | <para>This parameter sets the library directory to
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[5e06d04] | 61 | <filename>/usr/lib</filename> rather than
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| 62 | <filename>/usr/lib64</filename> on x86_64. It has no effect on
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[1fa2099] | 63 | x86.</para>
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| 64 | </listitem>
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| 65 | </varlistentry>
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| 66 | </variablelist>
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| 67 |
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[f8ea68b] | 68 | <para>To test the results, issue:</para>
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[1fa2099] | 69 |
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[f8ea68b] | 70 | <screen><userinput remap="test">make test</userinput></screen>
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| 71 |
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[5e06d04] | 72 | <para>Install the package and make sure the essential libraries are in
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| 73 | the correct directory:</para>
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[f8ea68b] | 74 |
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[5e06d04] | 75 | <screen><userinput remap="install">make prefix=/usr lib=lib install
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[9f62bc3] | 76 | for libname in cap psx; do
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[5e06d04] | 77 | mv -v /usr/lib/lib${libname}.so.* /lib
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[9f62bc3] | 78 | ln -sfv ../../lib/lib${libname}.so.2 /usr/lib/lib${libname}.so
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[5e06d04] | 79 | chmod -v 755 /lib/lib${libname}.so.&libcap-version;
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[9f62bc3] | 80 | done</userinput></screen>
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[1fa2099] | 81 |
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| 82 | </sect2>
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| 83 |
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[37e35d2] | 84 | <!-- - - - - - - - - - -->
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| 85 | <!-- Multilib - 32bit -->
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| 86 | <!-- - - - - - - - - - -->
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| 87 |
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[ee1a413] | 88 | <sect2 arch="ml_32,ml_all" role="installation">
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[37e35d2] | 89 | <title>Installation of Libcap - 32bit</title>
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[8eb3fe4] | 90 |
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| 91 | <para>Clean previous build:</para>
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| 92 |
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| 93 | <screen><userinput remap="pre">make distclean</userinput></screen>
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| 94 |
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| 95 | <para>Compile the package:</para>
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| 96 |
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| 97 | <screen><userinput remap="make">make CC="gcc -m32 -march=i686"</userinput></screen>
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| 98 |
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| 99 | <para>Install the package:</para>
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| 100 |
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| 101 | <screen><userinput remap="install">make lib=lib32 prefix=$PWD/DESTDIR/usr -C libcap install
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[37e35d2] | 102 | cp -Rv DESTDIR&usr-lib-m32;/* &usr-lib-m32;
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| 103 | sed -e "s|^libdir=.*|libdir=&usr-lib-m32;|" -i &usr-lib-m32;/pkgconfig/lib{cap,psx}.pc
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| 104 | chmod -v 755 &usr-lib-m32;/libcap.so.&libcap-version;
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[8eb3fe4] | 105 | rm -rf DESTDIR</userinput></screen>
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| 106 |
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[37e35d2] | 107 | </sect2><!-- m32 -->
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[8eb3fe4] | 108 |
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[37e35d2] | 109 | <!-- - - - - - - - - - -->
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| 110 | <!-- Multilib - x32bit -->
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| 111 | <!-- - - - - - - - - - -->
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| 112 |
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[ee1a413] | 113 | <sect2 arch="ml_x32,ml_all" role="installation">
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[37e35d2] | 114 | <title>Installation of Libcap - x32bit</title>
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[8eb3fe4] | 115 |
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| 116 | <para>Clean previous build:</para>
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| 117 |
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| 118 | <screen><userinput remap="pre">make distclean</userinput></screen>
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| 119 |
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| 120 | <para>Compile the package:</para>
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| 121 |
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[37e35d2] | 122 | <screen><userinput remap="make">make CC="gcc -mx32 -march=x86-64"</userinput></screen>
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[8eb3fe4] | 123 |
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| 124 | <para>Install the package:</para>
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| 125 |
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| 126 | <screen><userinput remap="install">make lib=libx32 prefix=$PWD/DESTDIR/usr -C libcap install
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[37e35d2] | 127 | cp -Rv DESTDIR&usr-lib-mx32;/* &usr-lib-mx32;
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| 128 | sed -e "s|^libdir=.*|libdir=&usr-lib-mx32;|" -i &usr-lib-mx32;/pkgconfig/lib{cap,psx}.pc
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| 129 | chmod -v 755 &usr-lib-mx32;/libcap.so.&libcap-version;
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[8eb3fe4] | 130 | rm -rf DESTDIR</userinput></screen>
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| 131 |
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[37e35d2] | 132 | </sect2><!-- mx32 -->
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[8eb3fe4] | 133 |
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[1fa2099] | 134 | <sect2 id="contents-libcap" role="content">
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| 135 | <title>Contents of Libcap</title>
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| 136 |
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| 137 | <segmentedlist>
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| 138 | <segtitle>Installed programs</segtitle>
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| 139 | <segtitle>Installed library</segtitle>
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| 140 |
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| 141 | <seglistitem>
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| 142 | <seg>capsh, getcap, getpcaps, and setcap</seg>
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[9f62bc3] | 143 | <seg>libcap.so and libpsx.so</seg>
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[1fa2099] | 144 | </seglistitem>
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| 145 | </segmentedlist>
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| 146 |
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| 147 | <variablelist>
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| 148 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 149 | <?dbfo list-presentation="list"?>
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| 150 | <?dbhtml list-presentation="table"?>
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| 151 |
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| 152 | <varlistentry id="capsh">
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| 153 | <term><command>capsh</command></term>
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| 154 | <listitem>
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| 155 | <para>A shell wrapper to explore and constrain capability support</para>
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| 156 | <indexterm zone="ch-system-libcap capsh">
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| 157 | <primary sortas="b-capsh">capsh</primary>
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| 158 | </indexterm>
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| 159 | </listitem>
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| 160 | </varlistentry>
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| 161 |
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| 162 | <varlistentry id="getcap">
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| 163 | <term><command>getcap</command></term>
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| 164 | <listitem>
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| 165 | <para>Examines file capabilities</para>
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| 166 | <indexterm zone="ch-system-libcap getcap">
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| 167 | <primary sortas="b-getcap">getcap</primary>
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| 168 | </indexterm>
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| 169 | </listitem>
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| 170 | </varlistentry>
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| 171 |
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| 172 | <varlistentry id="getpcaps">
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| 173 | <term><command>getpcaps</command></term>
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| 174 | <listitem>
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| 175 | <para>Displays the capabilities on the queried process(es)</para>
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| 176 | <indexterm zone="ch-system-libcap getpcaps">
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| 177 | <primary sortas="b-getpcaps">getpcaps</primary>
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| 178 | </indexterm>
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| 179 | </listitem>
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| 180 | </varlistentry>
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| 181 |
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| 182 | <varlistentry id="setcap">
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| 183 | <term><command>setcap</command></term>
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| 184 | <listitem>
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| 185 | <para>Sets file capabilities</para>
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| 186 | <indexterm zone="ch-system-libcap setcap">
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| 187 | <primary sortas="b-setcap">setcap</primary>
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| 188 | </indexterm>
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| 189 | </listitem>
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| 190 | </varlistentry>
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| 191 |
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| 192 | <varlistentry id="libcap">
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| 193 | <term><filename class="libraryfile">libcap</filename></term>
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| 194 | <listitem>
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| 195 | <para>Contains the library functions for manipulating POSIX 1003.1e
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| 196 | capabilities</para>
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| 197 | <indexterm zone="ch-system-libcap libcap">
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| 198 | <primary sortas="c-libcap">libcap</primary>
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| 199 | </indexterm>
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| 200 | </listitem>
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| 201 | </varlistentry>
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| 202 |
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[f8ea68b] | 203 | <varlistentry id="libpsx">
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| 204 | <term><filename class="libraryfile">libpsx</filename></term>
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| 205 | <listitem>
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| 206 | <para>Contains functions to support POSIX semantics for syscalls
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| 207 | associated with the pthread library</para>
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| 208 | <indexterm zone="ch-system-libcap libpsx">
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| 209 | <primary sortas="c-libpsx">libpsx</primary>
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| 210 | </indexterm>
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| 211 | </listitem>
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| 212 | </varlistentry>
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| 213 |
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[1fa2099] | 214 | </variablelist>
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| 215 |
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| 216 | </sect2>
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| 217 |
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| 218 | </sect1>
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