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 | <!ENTITY libcap-download-http "https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-&libcap-version;.tar.xz">
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8 | <!ENTITY libcap-download-ftp "ftp://ftp.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-&libcap-version;.tar.xz">
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9 | <!ENTITY libcap-md5sum "d43ab9f680435a7fff35b4ace8d45b80">
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10 | <!ENTITY libcap-size "62 KB">
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11 | <!ENTITY libcap-buildsize "1.5 MB">
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12 | <!ENTITY libcap-time "0.1 SBU">
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13 | ]>
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14 |
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15 | <sect1 id="libcap-pam" xreflabel="libcap-&libcap-version; with PAM">
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16 | <?dbhtml filename="libcap.html"?>
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17 |
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18 | <sect1info>
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19 | <othername>$LastChangedBy$</othername>
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20 | <date>$Date$</date>
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21 | </sect1info>
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22 |
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23 | <title>libcap-&libcap-version; with PAM</title>
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24 |
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25 | <indexterm zone="libcap-pam">
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26 | <primary sortas="a-libcap-pam">libcap</primary>
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27 | </indexterm>
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28 |
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29 | <sect2 role="package">
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30 | <title>Introduction to libcap with PAM</title>
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31 |
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32 | <para>The <application>libcap</application> package was installed in
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33 | LFS, but if PAM support is desired, it needs to be reinstalled after
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34 | PAM is built.</para>
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35 | &lfs77_checked;
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36 |
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37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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38 | <itemizedlist spacing="compact">
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39 | <listitem>
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40 | <para>Download (HTTP): <ulink url="&libcap-download-http;"/></para>
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41 | </listitem>
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42 | <listitem>
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43 | <para>Download (FTP): <ulink url="&libcap-download-ftp;"/></para>
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44 | </listitem>
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45 | <listitem>
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46 | <para>Download MD5 sum: &libcap-md5sum;</para>
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47 | </listitem>
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48 | <listitem>
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49 | <para>Download size: &libcap-size;</para>
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50 | </listitem>
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51 | <listitem>
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52 | <para>Estimated disk space required: &libcap-buildsize;</para>
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53 | </listitem>
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54 | <listitem>
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55 | <para>Estimated build time: &libcap-time;</para>
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56 | </listitem>
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57 | </itemizedlist>
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58 |
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59 | <bridgehead renderas="sect3">libcap Dependencies</bridgehead>
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60 |
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61 | <bridgehead renderas="sect4">Required</bridgehead>
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62 | <para role="required"><xref linkend="linux-pam"/></para>
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63 |
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64 | <para condition="html" role="usernotes">User Notes:
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65 | <ulink url="&blfs-wiki;/libcap"/></para>
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66 |
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67 | </sect2>
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68 |
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69 | <sect2 role="installation">
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70 | <title>Installation of libcap</title>
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71 |
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72 | <para>Install <application>libcap</application> by running the following
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73 | commands:</para>
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74 |
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75 | <screen><userinput>sed -i 's:LIBDIR:PAM_&:g' pam_cap/Makefile &&
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76 | make</userinput></screen>
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77 |
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78 | <para>This package does not come with a test suite.</para>
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79 |
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80 | <para>
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81 | If you want to disable installing the static library, use this sed:
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82 | </para>
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83 |
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84 | <screen><userinput>sed -i '/install.*STALIBNAME/ s/^/#/' libcap/Makefile</userinput></screen>
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85 |
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86 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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87 |
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88 | <screen role="root"><userinput>make prefix=/usr \
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89 | SBINDIR=/sbin \
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90 | PAM_LIBDIR=/lib \
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91 | RAISE_SETFCAP=no install</userinput></screen>
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92 |
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93 | <para>
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94 | Still as the <systemitem class="username">root</systemitem> user,
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95 | clean up some library locations and permissions:
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96 | </para>
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97 |
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98 | <screen role="root"><userinput>chmod -v 755 /usr/lib/libcap.so &&
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99 | mv -v /usr/lib/libcap.so.* /lib &&
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100 | ln -sfv ../../lib/libcap.so.2 /usr/lib/libcap.so</userinput></screen>
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101 |
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102 | </sect2>
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103 |
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104 | <sect2 role="commands">
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105 | <title>Command Explanations</title>
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106 |
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107 | <para>
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108 | <command>sed -i '...'</command>, <parameter>PAM_LIBDIR=/lib</parameter>:
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109 | These correct PAM module install location.
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110 | </para>
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111 |
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112 | <para><parameter>RAISE_SETFCAP=no</parameter>: This parameter skips trying
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113 | to use <application>setcap</application> on itself. This avoids an installation
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114 | error if the kernel or file system do not support extended capabilities.</para>
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115 |
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116 | </sect2>
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117 |
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118 | <sect2 role="content">
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119 | <title>Contents</title>
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120 |
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121 | <segmentedlist>
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122 | <segtitle>Installed Programs</segtitle>
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123 | <segtitle>Installed Library</segtitle>
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124 | <segtitle>Installed Directories</segtitle>
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125 |
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126 | <seglistitem>
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127 | <seg>capsh, getcap, getpcaps, and setcap</seg>
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128 | <seg>libcap.{so,a}</seg>
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129 | <seg>None</seg>
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130 | </seglistitem>
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131 | </segmentedlist>
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132 |
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133 | <variablelist>
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134 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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135 | <?dbfo list-presentation="list"?>
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136 | <?dbhtml list-presentation="table"?>
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137 |
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138 | <varlistentry id="capsh">
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139 | <term><command>capsh</command></term>
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140 | <listitem>
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141 | <para>is a shell wrapper to explore and constrain capability support.</para>
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142 | <indexterm zone="libcap-pam capsh">
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143 | <primary sortas="b-capsh">capsh</primary>
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144 | </indexterm>
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145 | </listitem>
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146 | </varlistentry>
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147 |
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148 | <varlistentry id="getcap">
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149 | <term><command>getcap</command></term>
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150 | <listitem>
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151 | <para>examines file capabilities.</para>
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152 | <indexterm zone="libcap-pam getcap">
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153 | <primary sortas="b-getcap">getcap</primary>
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154 | </indexterm>
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155 | </listitem>
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156 | </varlistentry>
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157 |
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158 | <varlistentry id="getpcaps">
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159 | <term><command>getpcaps</command></term>
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160 | <listitem>
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161 | <para>displays the capabilities on the queried process(es).</para>
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162 | <indexterm zone="libcap-pam getpcaps">
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163 | <primary sortas="b-getpcaps">getpcaps</primary>
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164 | </indexterm>
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165 | </listitem>
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166 | </varlistentry>
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167 |
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168 | <varlistentry id="setcap">
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169 | <term><command>setcap</command></term>
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170 | <listitem>
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171 | <para>sets file file capabilities.</para>
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172 | <indexterm zone="libcap-pam setcap">
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173 | <primary sortas="b-setcap">setcap</primary>
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174 | </indexterm>
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175 | </listitem>
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176 | </varlistentry>
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177 |
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178 | <varlistentry id="libcap-lib">
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179 | <term><filename class='libraryfile'>libcap.{so,a}</filename></term>
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180 | <listitem>
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181 | <para>contains the <application>libcap</application> API functions.</para>
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182 | <indexterm zone="libcap-pam libcap-lib">
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183 | <primary sortas="c-libcap">libcap.{so,a}</primary>
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184 | </indexterm>
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185 | </listitem>
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186 | </varlistentry>
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187 |
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188 | </variablelist>
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189 |
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190 | </sect2>
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191 |
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192 | </sect1>
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