1 | <sect2><title>Contents of Glibc</title>
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2 |
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3 | <para>Last checked against version &glibc-contversion;.</para>
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4 |
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5 | <sect3><title>Program Files</title>
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6 |
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7 | <para>catchsegv, gencat, getconf, getent, glibcbug, iconv, iconvconfig,
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8 | ldconfig, ldd, lddlibc4, locale, localedef, mtrace, nscd, nscd_nischeck,
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9 | pcprofiledump, pt_chown, rpcgen, rpcinfo, sln, sprof, tzselect, xtrace,
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10 | zdump and zic</para></sect3>
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11 |
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12 | <sect3><title>Descriptions</title>
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13 |
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14 | <sect4><title>catchsegv</title>
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15 | <para>catchsegv can be used to create a stack trace when a program
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16 | terminates with a segmentation fault.</para></sect4>
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17 |
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18 | <sect4><title>gencat</title>
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19 | <para>gencat generates message catalogues.</para></sect4>
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20 |
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21 | <sect4><title>getconf</title>
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22 | <para>getconf displays the system configuration values for filesystem
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23 | specific variables.</para></sect4>
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24 |
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25 | <sect4><title>getent</title>
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26 | <para>getent gets entries from an administrative database.</para></sect4>
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27 |
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28 | <sect4><title>glibcbug</title>
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29 | <para>glibcbug creates a bug report about glibc and and mails it to the
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30 | bug email address.</para></sect4>
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31 |
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32 | <sect4><title>iconv</title>
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33 | <para>iconv performs character set conversion.</para></sect4>
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34 |
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35 | <sect4><title>iconvconfig</title>
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36 | <para>iconvconfig creates fastloading iconv module
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37 | configuration file.</para></sect4>
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38 |
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39 | <sect4><title>ldconfig</title>
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40 | <para>ldconfig configures the dynamic linker run time bindings.</para></sect4>
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41 |
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42 | <sect4><title>ldd</title>
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43 | <para>ldd prints the shared libraries required by each program or shared
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44 | library specified on the command line.</para></sect4>
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45 |
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46 | <sect4><title>lddlibc4</title>
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47 | <para>lddlibc4 assists ldd with object files.</para></sect4>
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48 |
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49 | <sect4><title>locale</title>
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50 | <para>locale is a Perl program which tells the compiler to enable
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51 | (or disable) the use of POSIX locales for built-in operations.</para></sect4>
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52 |
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53 | <sect4><title>localedef</title>
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54 | <para>localedef compiles locale specifications.</para></sect4>
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55 |
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56 | <sect4><title>mtrace</title>
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57 | <para>mtrace prints the multicast path from a source to a receiver (an IP
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58 | trace query).</para></sect4>
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59 |
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60 | <sect4><title>nscd</title>
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61 | <para>nscd is a daemon that provides a cache for the most common name
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62 | service requests.</para></sect4>
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63 |
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64 | <sect4><title>nscd_nischeck</title>
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65 | <para>nscd_nischeck checks whether or not secure mode is necessary for
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66 | NIS+ lookup.</para></sect4>
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67 |
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68 | <sect4><title>pcprofiledump</title>
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69 | <para>pcprofiledump dumps information generated by
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70 | PC profiling.</para></sect4>
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71 |
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72 | <sect4><title>pt_chown</title>
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73 | <para>pt_chown sets the owner, group and access permission of the
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74 | slave pseudo terminal corresponding to the master pseudo terminal passed
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75 | on file descriptor `3'. This is the helper program for the `grantpt'
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76 | function. It is not intended to be run directly from the command
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77 | line.</para></sect4>
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78 |
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79 | <sect4><title>rpcgen</title>
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80 | <para>rpcgen generates C code to implement the RPC protocol.</para></sect4>
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81 |
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82 | <sect4><title>rpcinfo</title>
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83 | <para>rpcinfo makes an RPC call to an RPC server.</para></sect4>
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84 |
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85 | <sect4><title>sln</title>
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86 | <para>sln symbolically links dest to source. It is statically linked,
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87 | needing no dynamic linking at all. Thus sln is useful to make symbolic
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88 | links to dynamic libraries if the dynamic linking system for some reason
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89 | is nonfunctional.</para></sect4>
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90 |
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91 | <sect4><title>sprof</title>
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92 | <para>sprof reads and displays shared object profiling data.</para></sect4>
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93 |
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94 | <sect4><title>tzselect</title>
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95 | <para>tzselect asks the user for information about the current location and
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96 | outputs the resulting time zone description to standard output.</para></sect4>
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97 |
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98 | <sect4><title>xtrace</title>
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99 | <para>xtrace traces execution of program by printing the currently executed
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100 | function.</para></sect4>
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101 |
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102 | <sect4><title>zdump</title>
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103 | <para>zdump is the time zone dumper.</para></sect4>
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104 |
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105 | <sect4><title>zic</title>
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106 | <para>zic is the time zone compiler.</para></sect4>
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107 |
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108 | </sect3>
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109 |
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110 | <sect3><title>Library Files</title>
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111 | <para>ld.so, libBrokenLocale.[a,so], libBrokenLocale_p.a,
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112 | libSegFault.so, libanl.[a,so], libanl_p.a, libbsd-compat.a, libc.[a,so],
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113 | libc_nonshared.a, libc_p.a, libcrypt.[a,so], libcrypt_p.a, libdl.[a,so],
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114 | libdl_p.a, libg.a, libieee.a, libm.[a,so], libm_p.a, libmcheck.a,
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115 | libmemusage.so, libnsl.a, libnsl_p.a, libnss_compat.so, libnss_dns.so,
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116 | libnss_files.so, libnss_hesiod.so, libnss_nis.so, libnss_nisplus.so,
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117 | libpcprofile.so, libpthread.[a,so], libpthread_p.a, libresolv.[a,so],
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118 | libresolv_p.a, librpcsvc.a, librpcsvc_p.a, librt.[a,so], librt_p.a,
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119 | libthread_db.so, libutil.[a,so] and libutil_p.a</para></sect3>
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120 |
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121 | <sect3><title>Descriptions</title>
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122 |
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123 | <sect4><title>ld.so</title>
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124 | <para>ld.so is the helper program for shared library
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125 | executables.</para></sect4>
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126 |
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127 | <sect4><title>libBrokenLocale, libBrokenLocale_p</title>
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128 | <para>Used by software, such as Mozilla, to solve broken locales.</para></sect4>
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129 |
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130 | <sect4><title>libSegFault</title>
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131 | <para>libSegFault is a segmentation fault signal handler. It tries to catch
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132 | segfaults.</para></sect4>
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133 |
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134 | <sect4><title>libanl, libanl_p</title>
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135 | <para>libanl is an asynchronous name lookup library.</para></sect4>
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136 |
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137 | <sect4><title>libbsd-compat</title>
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138 | <para>libbsd-compat provides the portability needed in order to run certain
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139 | programs in Linux.</para></sect4>
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140 |
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141 | <sect4><title>libc, libc_nonshared, libc_p</title>
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142 | <para>These files constitute the main C library. The C library is a
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143 | collection of commonly used functions in programs.
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144 | This way a programmer doesn't need to create his own functions for every
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145 | single task. The most common things like writing a string to the screen
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146 | are already present and at the disposal of the programmer.</para>
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147 |
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148 | <para>The C library (actually almost every library) comes in two flavors:
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149 | a dynamic and a static one. In short, when a program uses a static C
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150 | library, the code from the C library is copied into the executable file.
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151 | When a program uses a dynamic library, the executable will not
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152 | contain the code from the C library, but instead a routine that loads
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153 | the functions from the library at the time the program is run. This
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154 | means a significant decrease in the file size of a program. The
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155 | documentation that comes with the C library describes this in more
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156 | detail, as it is too complicated to explain here in one or two
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157 | lines.</para></sect4>
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158 |
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159 | <sect4><title>libcrypt, libcrypt_p</title>
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160 | <para>libcrypt is the cryptography library.</para></sect4>
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161 |
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162 | <sect4><title>libdl, libdl_p</title>
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163 | <para>libdl is the dynamic linking interface library.</para></sect4>
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164 |
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165 | <sect4><title>libg</title>
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166 | <para>libg is a runtime library for g++.</para></sect4>
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167 |
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168 | <sect4><title>libieee</title>
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169 | <para>libieee is the IEEE floating point library.</para></sect4>
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170 |
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171 | <sect4><title>libm, libm_p</title>
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172 | <para>libm is the mathematical library.</para></sect4>
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173 |
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174 | <sect4><title>libmcheck</title>
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175 | <para>libmcheck contains code run at boot.</para></sect4>
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176 |
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177 | <sect4><title>libmemusage</title>
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178 | <para>libmemusage is used by memusage to help collect information about the
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179 | memory usage of a program.</para></sect4>
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180 |
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181 | <sect4><title>libnsl, libnsl_p</title>
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182 | <para>libnsl is the network services library.</para></sect4>
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183 |
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184 | <sect4><title>libnss_compat, libnss_dns, libnss_files,
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185 | libnss_hesiod, libnss_nis, libnss_nisplus</title>
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186 | <para>The basic idea is to put the implementation of the different services
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187 | offered to access the databases in separate modules. This has some
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188 | advantages:</para>
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189 | <itemizedlist>
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190 | <listitem><para>contributors can add new services without adding them to
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191 | GNU C library,</para></listitem>
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192 | <listitem><para>the modules can be updated separately,</para></listitem>
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193 | <listitem><para>the C library image is smaller.</para></listitem>
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194 | </itemizedlist></sect4>
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195 |
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196 | <sect4><title>libpcprofile</title>
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197 | <para>Code used by the kernel to track CPU time spent in functions, source
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198 | code lines, and instructions.</para></sect4>
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199 |
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200 | <sect4><title>libpthread, libpthread_p</title>
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201 | <para>The POSIX threads library.</para></sect4>
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202 |
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203 | <sect4><title>libresolv, libresolv_p</title>
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204 | <para>Functions in this library provide for creating, sending, and
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205 | interpreting packets to the Internet domain name servers.</para></sect4>
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206 |
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207 | <sect4><title>librpcsvc, librpcsvc_p</title>
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208 | <para>Functions in this library provide miscellaneous RPC services.</para></sect4>
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209 |
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210 | <sect4><title>librt, librt_p</title>
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211 | <para>Functions in this library provide most of the interfaces specified by
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212 | the POSIX.1b Realtime Extension.</para></sect4>
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213 |
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214 | <sect4><title>libthread_db</title>
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215 | <para>Functions is this library are useful for building debuggers for
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216 | multi-threaded programs.</para></sect4>
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217 |
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218 | <sect4><title>libutil, libutil_p</title>
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219 | <para>Contains code for "standard" functions used in many different Unix
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220 | utilities.</para></sect4>
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221 |
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222 | </sect3>
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223 |
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224 | </sect2>
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225 |
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