comparison: openpkg/uuid.8
openpkg/uuid.8
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- f880f219c566
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| 129 .\" ======================================================================== | |
| 130 .\" | |
| 131 .IX Title "UUID 8" | |
| 132 .TH UUID 8 "OpenPKG" "UUID(8)" "OpenPKG" | |
| 133 .SH "NAME" | |
| 134 \&\fBopenpkg uuid\fR \- OpenPKG UUID Update Utility | |
| 135 .SH "SYNOPSIS" | |
| 136 .IX Header "SYNOPSIS" | |
| 137 \&\fBopenpkg uuid\fR [\fB\-\-verbose\fR] [\fB\-\-multicast\fR] \fBreset\fR|\fBupdate\fR|\fBinfo\fR | |
| 138 .SH "DESCRIPTION" | |
| 139 .IX Header "DESCRIPTION" | |
| 140 The \fBopenpkg uuid\fR command is the maintenance utility for the \s-1DCE\s0 1.1 | |
| 141 and \s-1ISO/IEC\s0 11578:1996 compliant \fIUniversally Unique Identifiers\fR | |
| 142 (\s-1UUID\s0) of an \fBOpenPKG\fR instance. It is internally based on \fB\s-1OSSP\s0 | |
| 143 uuid\fR. | |
| 144 .PP | |
| 145 UUIDs are 128 bit numbers which are intended to have a high likelihood | |
| 146 of uniqueness over space and time and are computationally difficult | |
| 147 to guess. They are globally unique identifiers which can be locally | |
| 148 generated without contacting a global registration authority. UUIDs are | |
| 149 intended as unique identifiers for both mass tagging objects with an | |
| 150 extremely short lifetime and to reliably identifying very persistent | |
| 151 objects across a network. The three classical \s-1UUID\s0 variants are \s-1DCE\s0 1.1 | |
| 152 UUIDs of version 1 (time and node based), version 3 (name based) and | |
| 153 version 4 (random number based). | |
| 154 .PP | |
| 155 For an \fBOpenPKG\fR instance, three different UUIDs are used: | |
| 156 .ie n .IP "1. \fBOpenPKG Registry\fR (\*(C`UUID_REGISTRY\*(C')" 3 | |
| 157 .el .IP "1. \fBOpenPKG Registry\fR (\f(CW\*(C`UUID_REGISTRY\*(C'\fR)" 3 | |
| 158 .IX Item "1. OpenPKG Registry (UUID_REGISTRY)" | |
| 159 This is a version 1 \s-1UUID\s0 which uniquely identifiers the \fBOpenPKG\fR | |
| 160 instance for global registration purposes. It is generated just once in | |
| 161 the lifetime of the \fBOpenPKG\fR instance. The value of this \s-1UUID\s0 cannot | |
| 162 be recalculated deterministically. | |
| 163 .ie n .IP "2. \fBOpenPKG Instance\fR (\*(C`UUID_INSTANCE\*(C')" 3 | |
| 164 .el .IP "2. \fBOpenPKG Instance\fR (\f(CW\*(C`UUID_INSTANCE\*(C'\fR)" 3 | |
| 165 .IX Item "2. OpenPKG Instance (UUID_INSTANCE)" | |
| 166 This is a version 3 \s-1UUID\s0 which summarizes the \fBOpenPKG\fR | |
| 167 instance parameters. Currently the values of the following | |
| 168 particular OpenPKG \s-1RPM\s0 macros are uses as input: | |
| 169 .Sp | |
| 170 .Vb 5 | |
| 171 \& %{l_openpkg_release} %{l_prefix} | |
| 172 \& %{l_susr} %{l_suid} %{l_sgrp} %{l_sgid} | |
| 173 \& %{l_musr} %{l_muid} %{l_mgrp} %{l_mgid} | |
| 174 \& %{l_rusr} %{l_ruid} %{l_rgrp} %{l_rgid} | |
| 175 \& %{l_nusr} %{l_nuid} %{l_ngrp} %{l_ngid} | |
| 176 .Ve | |
| 177 .Sp | |
| 178 The value of this \s-1UUID\s0 can be recalculated deterministically and will | |
| 179 not chance as long as none of the values of the above macro do not | |
| 180 change. This \s-1UUID\s0 can be used for detecting OpenPKG release upgrades, | |
| 181 accidentally changed UIDs or GIDs, etc. Notice that version 3 UUIDs are | |
| 182 message digests (actually \s-1MD5\s0 based) and so are one-way functions which do | |
| 183 not allow one to recalculate the input values from the \s-1UUID\s0. | |
| 184 .ie n .IP "3. \fBOpenPKG Platform\fR (\*(C`UUID_PLATFORM\*(C')" 3 | |
| 185 .el .IP "3. \fBOpenPKG Platform\fR (\f(CW\*(C`UUID_PLATFORM\*(C'\fR)" 3 | |
| 186 .IX Item "3. OpenPKG Platform (UUID_PLATFORM)" | |
| 187 This is a version 3 \s-1UUID\s0 which summarizes the \fBOpenPKG\fR platform | |
| 188 parameters. Currently the OpenPKG \s-1RPM\s0 platform id plus the \s-1FQDN\s0 and \s-1IP\s0 | |
| 189 address of the underlying host are used as input. This \s-1UUID\s0 can be used | |
| 190 for detecting operating system and host changes. Notice that version | |
| 191 3 UUIDs are message digests (actually \s-1MD5\s0 based) and so are one-way | |
| 192 functions which do not allow one to recalculate the input values from | |
| 193 the \s-1UUID\s0. | |
| 194 .SH "OPTIONS" | |
| 195 .IX Header "OPTIONS" | |
| 196 .IP "\fB\-\-verbose\fR" 4 | |
| 197 .IX Item "--verbose" | |
| 198 Print verbose messages during operation. | |
| 199 .IP "\fB\-\-multicast\fR" 4 | |
| 200 .IX Item "--multicast" | |
| 201 Generate a random multicast \s-1MAC\s0 address instead of using the real \s-1IEEE\s0 | |
| 202 802 \s-1MAC\s0 address of the underlying host when generating the version 1 | |
| 203 \&\s-1UUID\s0 \f(CW\*(C`UUID_REGISTRY\*(C'\fR. | |
| 204 .SH "COMMANDS" | |
| 205 .IX Header "COMMANDS" | |
| 206 .IP "\fBreset\fR" 4 | |
| 207 .IX Item "reset" | |
| 208 This resets the three UUIDs \f(CW\*(C`UUID_REGISTRY\*(C'\fR, \f(CW\*(C`UUID_INSTANCE\*(C'\fR and | |
| 209 \&\f(CW\*(C`UUID_PLATFORM\*(C'\fR to the \*(L"Nil \s-1UUID\s0\*(R". They are then automatically | |
| 210 regenerated within one day if already done explicitly afterward with | |
| 211 "\f(CW\*(C`openpkg uuid update\*(C'\fR". | |
| 212 .IP "\fBupdate\fR" 4 | |
| 213 .IX Item "update" | |
| 214 This updates the three UUIDs \f(CW\*(C`UUID_REGISTRY\*(C'\fR, \f(CW\*(C`UUID_INSTANCE\*(C'\fR and | |
| 215 \&\f(CW\*(C`UUID_PLATFORM\*(C'\fR to the \*(L"Nil \s-1UUID\s0\*(R". \f(CW\*(C`UUID_REGISTRY\*(C'\fR is kept unless it | |
| 216 is the \*(L"Nil \s-1UUID\s0\*(R" (see "\f(CW\*(C`openpkg uuid reset\*(C'\fR" command above). The UUIDs | |
| 217 \&\f(CW\*(C`UUID_INSTANCE\*(C'\fR and \f(CW\*(C`UUID_PLATFORM\*(C'\fR are updated only if their input | |
| 218 values (and this way the resulting UUIDs) have changed. This operation | |
| 219 is performed daily automatically. | |
| 220 .IP "\fBinfo\fR" 4 | |
| 221 .IX Item "info" | |
| 222 This print summary page of identification information, including all | |
| 223 UUIDs and all of their calculation inputs. | |
| 224 .SH "FILES" | |
| 225 .IX Header "FILES" | |
| 226 The three UUIDs of the \fBOpenPKG\fR instance are stored in the file | |
| 227 \&\f(CW\*(C`@l_prefix@/etc/openpkg/uuid\*(C'\fR in Bourne-Shell syntax. An example | |
| 228 content is: | |
| 229 .PP | |
| 230 .Vb 3 | |
| 231 \& UUID_REGISTRY="81eca44e-4d18-11d8-a837-0090272ff725" | |
| 232 \& UUID_INSTANCE="c55a8d2d-31bb-3ae0-9edb-68337af61acc" | |
| 233 \& UUID_PLATFORM="05ec2532-9e3f-37dc-a7ed-b291c2c463ed" | |
| 234 .Ve | |
| 235 .SH "CAVEATS" | |
| 236 .IX Header "CAVEATS" | |
| 237 By default and in full compliance with \s-1DCE\s0 1.1 and \s-1ISO/IEC\s0 11578:1996, | |
| 238 the OpenPKG Registry \s-1UUID\s0 (\f(CW\*(C`UUID_REGISTRY\*(C'\fR) contains the \s-1IEEE\s0 802 \s-1MAC\s0 | |
| 239 address of the underlying host. If this is not acceptable by local | |
| 240 security policies you can easily at any time generate a new OpenPKG | |
| 241 Registry \s-1UUID\s0 with a random multicast \s-1MAC\s0 address instead by running: | |
| 242 .PP | |
| 243 .Vb 2 | |
| 244 \& $ openpkg uuid reset | |
| 245 \& $ openpkg uuid --multicast update | |
| 246 .Ve | |
| 247 .SH "SEE ALSO" | |
| 248 .IX Header "SEE ALSO" | |
| 249 \&\fB\s-1OSSP\s0 uuid\fR <http://www.ossp.org/pkg/lib/uuid/>. | |
| 250 .SH "HISTORY" | |
| 251 .IX Header "HISTORY" | |
| 252 The \fBopenpkg uuid\fR command first appeared in \fBOpenPKG 2.0\fR. |
