comparison: openpkg/lsync.8
openpkg/lsync.8
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| 129 .\" ======================================================================== | |
| 130 .\" | |
| 131 .IX Title "LSYNC 8" | |
| 132 .TH LSYNC 8 "OpenPKG" "LSYNC(8)" "OpenPKG" | |
| 133 .SH "NAME" | |
| 134 \&\fBopenpkg lsync\fR \- Access Layer Synchronization Tool | |
| 135 .SH "SYNOPSIS" | |
| 136 .IX Header "SYNOPSIS" | |
| 137 \&\fBopenpkg lsync\fR | |
| 138 [\fB\-\-version\fR|\fB\-v\fR] | |
| 139 [\fB\-\-help\fR|\fB\-h\fR] | |
| 140 [\fB\-\-init\fR|\fB\-i\fR] | |
| 141 [\fB\-\-nop\fR|\fB\-n\fR] | |
| 142 [\fB\-\-quiet\fR|\fB\-q\fR] | |
| 143 [\fB\-\-trace\fR|\fB\-t\fR] | |
| 144 [\fB\-\-local\fR|\fB\-l\fR] | |
| 145 [\fB\-\-uninstall\fR|\fB\-u\fR] | |
| 146 [\fB\-\-root=\fR\fIroot\fR] | |
| 147 [\fB\-\-pkgdir=\fR\fIpkgdir\fR] | |
| 148 [\fB\-\-subdirs=\fR\fIsubdir\fR[,\fIsubdir\fR,...]] | |
| 149 .SH "DESCRIPTION" | |
| 150 .IX Header "DESCRIPTION" | |
| 151 This program activates software packages which were locally | |
| 152 installed in a sub-directory of a package hierarchy (located under | |
| 153 \&\fIroot\fR/\fIpkgdir\fR/) by managing symbolic links in an access layer | |
| 154 (located under \fIroot\fR/) corresponding to package installation | |
| 155 files (found in \fIroot\fR/\fIpkgdir\fR/pkgname/subdir/) which need to be | |
| 156 collected in global directories (located under \fIroot\fR/subdir/). | |
| 157 .PP | |
| 158 The purpose of this is that individual packages can be installed and | |
| 159 deinstalled seperately without interfering with other packages while | |
| 160 all packages as a whole still can be treated like a single package | |
| 161 (installed into the access layer). | |
| 162 .PP | |
| 163 The | |
| 164 actual creation of symbolic links is as following (\*(L"foo\*(R" indicating an | |
| 165 arbitrary file; \*(L"bar\*(R" indicating an arbitrary package name): | |
| 166 .IP "\fIroot\fR\fB/bin/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/bin/\fRfoo" 4 | |
| 167 .IX Item "root/bin/foo -> ../pkgdir/bar/bin/foo" | |
| 168 This activates the user executeable | |
| 169 \&\fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/bin\fR/foo as \fIroot\fR\fB/bin/\fRfoo. It can | |
| 170 be found by the shell by placing \fIroot\fR\fB/bin\fR into the environment | |
| 171 variable \f(CW\*(C`PATH\*(C'\fR (\fBPATH="..:\fR\fIroot\fR\fB/bin:.."\fR). | |
| 172 .IP "\fIroot\fR\fB/sbin/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/sbin/\fRfoo" 4 | |
| 173 .IX Item "root/sbin/foo -> ../pkgdir/bar/sbin/foo" | |
| 174 This activates the system executeable | |
| 175 \&\fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/sbin\fR/foo as \fIroot\fR\fB/sbin/\fRfoo. It can | |
| 176 be found by the shell by placing \fIroot\fR\fB/sbin\fR into the environment | |
| 177 variable \f(CW\*(C`PATH\*(C'\fR (\fBPATH="..:\fR\fIroot\fR\fB/sbin:.."\fR). | |
| 178 .IP "\fIroot\fR\fB/man/man\fR\fIN\fR\fB/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/man/man\fR\fIN\fR\fB/\fRfoo" 4 | |
| 179 .IX Item "root/man/manN/foo -> ../pkgdir/bar/man/manN/foo" | |
| 180 This activates the Unix manual page | |
| 181 \&\fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/man/man\fR\fIN\fR\fB/\fRfoo as | |
| 182 \&\fIroot\fR\fB/man/man\fR\fIN\fR\fB/\fRfoo. It can be found by the \fIman\fR\|(1) tool | |
| 183 by placing \fIroot\fR\fB/man\fR into the environment variable \f(CW\*(C`MANPATH\*(C'\fR | |
| 184 (\fBMANPATH="..:\fR\fIroot\fR\fB/man:.."\fR). Keep in mind that \fBopenpkg lsync\fR | |
| 185 activates any files found in the \fBman/man\f(BIN\fB\fR sub-directory of the | |
| 186 package, but the \fIman\fR\|(1) tool usually requires the filename scheme | |
| 187 foo\fB.\fR\fIN\fR before it can find the file. | |
| 188 .IP "\fIroot\fR\fB/info/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/info/\fRfoo" 4 | |
| 189 .IX Item "root/info/foo -> ../pkgdir/bar/info/foo" | |
| 190 This activates the \s-1GNU\s0 info page \fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/info/\fRfoo | |
| 191 as \fIroot\fR\fB/info/\fRfoo. It can be found by the \fIinfo\fR\|(1) and \fIpinfo\fR\|(1) | |
| 192 tools by placing \fIroot\fR\fB/info\fR into the environment variable | |
| 193 \&\f(CW\*(C`INFOPATH\*(C'\fR (\fBINFOPATH="..:\fR\fIroot\fR\fB/info:.."\fR). Keep in mind that | |
| 194 \&\fBopenpkg lsync\fR activates any files found in the \fBinfo/\fR sub-directory of the | |
| 195 package, but the \fIinfo\fR\|(1) and \fIpinfo\fR\|(1) tools usually require the filename | |
| 196 scheme foo\fB.info\fR before it can find the file. | |
| 197 .IP "\fIroot\fR\fB/include/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/include/\fRfoo" 4 | |
| 198 .IX Item "root/include/foo -> ../pkgdir/bar/include/foo" | |
| 199 This activates the C header \fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/include\fR/foo | |
| 200 as \fIroot\fR\fB/include/\fRfoo. It can be found by the C/\*(C+ compilers | |
| 201 by adding \fIroot\fR\fB/include\fR to their include search path (\fBcc .. | |
| 202 \&\-I\fR\fIroot\fR\fB/include\fR \fB...\fR). Keep in mind that \fBopenpkg lsync\fR activates any | |
| 203 files found in the \fBinclude/\fR sub-directory of the package, but the | |
| 204 C/\*(C+ compiler usually by convention use the filename scheme foo\fB.h\fR. | |
| 205 .IP "\fIroot\fR\fB/lib/\fRfoo \-> \fB../\fR\fIpkgdir\fR\fB/\fRbar\fB/lib/\fRfoo" 4 | |
| 206 .IX Item "root/lib/foo -> ../pkgdir/bar/lib/foo" | |
| 207 This activates the C library \fIroot\fR\fB/\fR\fIpkgdir\fR\fB/\fRbar\fB/lib\fR/foo | |
| 208 as \fIroot\fR\fB/lib/\fRfoo. It can be found by the C/\*(C+ compilers (and | |
| 209 the linker they use) by adding \fIroot\fR\fB/lib\fR to their library search | |
| 210 path (\fBcc .. \-L\fR\fIroot\fR\fB/lib\fR \fB...\fR). It can be found by the Unix | |
| 211 Dynamic Loader by adding \fIroot\fR\fB/lib\fR to the environment variable | |
| 212 \&\f(CW\*(C`LD_LIBRARY_PATH\*(C'\fR (\fBLD_LIBRARY_PATH="..:\fR\fIroot\fR\fB/lib:.."\fR). | |
| 213 Keep in mind that \fBopenpkg lsync\fR activates any files found in the \fBlib/\fR | |
| 214 sub-directory of the package, but the C/\*(C+ compiler usually require the | |
| 215 filename scheme \fBlib\fRfoo\fB.a\fR and the Unix Dynamic Loader the filename | |
| 216 scheme \fBlib\fRfoo\fB.so\fR before they actually can use the file. | |
| 217 .PP | |
| 218 It is obvious that more sub-directories in a package installation | |
| 219 might exist \*(-- for instance \fBshare/\fR, \fBvar/\fR, \fBlibexec/\fR, etc. But | |
| 220 \&\fBopenpkg lsync\fR intentionally does not link files in those directories into | |
| 221 corresponding directories of the access layer, because those files do | |
| 222 not require that they are located in a global area in order to be used. | |
| 223 So \fBopenpkg lsync\fR only creates the access layer for files where a common area | |
| 224 is required for (easy) use. | |
| 225 .SH "SPECIAL FEATURES" | |
| 226 .IX Header "SPECIAL FEATURES" | |
| 227 There are two special features supported by \fBopenpkg lsync\fR: | |
| 228 .IP "\fBRun-Command Files\fR" 4 | |
| 229 .IX Item "Run-Command Files" | |
| 230 \&\fBopenpkg lsync\fR on startup implicitly reads command line options from | |
| 231 \&\f(CW\*(C`.lsyncrc\*(C'\fR files. They are searched in all parent directories and in | |
| 232 the callers home directory. Their contents is prepended to the list of | |
| 233 given command line options. | |
| 234 .IP "\fBMultiple Package Versions\fR" 4 | |
| 235 .IX Item "Multiple Package Versions" | |
| 236 \&\fBopenpkg lsync\fR skips all directories under \fIroot\fR/\fIpkgdir\fR/ which contain | |
| 237 the pattern \*(L"\-[0\-9]\*(R" in their directory name. On the other hand, | |
| 238 \&\fBopenpkg lsync\fR follows also symbolic links under \fIroot\fR/\fIpkgdir\fR/. | |
| 239 This can be used for installing multiple versions of a package and | |
| 240 switching between them. For instance, if version 1.0 of package | |
| 241 \&\*(L"foo\*(R" is installed into directory \fIroot\fR/\fIpkgdir\fR/foo\-1.0, | |
| 242 version 1.1 into \fIroot\fR/\fIpkgdir\fR/foo\-1.1 and version 1.2 into | |
| 243 \&\fIroot\fR/\fIpkgdir\fR/foo\-1.2, \fBopenpkg lsync\fR does skip all three. To enable | |
| 244 version 1.1 one just creates a symbolic link \fIroot\fR/\fIpkgdir\fR/foo | |
| 245 pointing to foo\-1.1. Then \fBopenpkg lsync\fR picks up the files in | |
| 246 \&\fIroot\fR/\fIpkgdir\fR/foo\-1.1. If you want to temporarily upgrade to | |
| 247 foo\-1.2, all you have to do is to change the symlink pointing from | |
| 248 foo\-1.1 to foo\-1.2. | |
| 249 .IP "\fBTemporarily Deactivated Package\fR" 4 | |
| 250 .IX Item "Temporarily Deactivated Package" | |
| 251 One can deactivate a package \*(L"foo\*(R" by going to \fIroot\fR/\fIpkgdir\fR/foo/ | |
| 252 and running \*(L"openpkg lsync \-\-local \-\-uninstall\*(R", of course. Alternatively | |
| 253 one can set the sticky bit on the directory \fIroot\fR/\fIpkgdir\fR/foo. | |
| 254 Then \fBopenpkg lsync\fR also skips the package. Alternatively, assume | |
| 255 package \*(L"foo\*(R" as a whole should not be deactivated, but its | |
| 256 \&\fIroot\fR/\fIpkgdir\fR/foo/lib directory (usually because this directory | |
| 257 unfortunately contains non-library files), one just sets the sticky bit | |
| 258 on \fIroot\fR/\fIpkgdir\fR/foo/lib. | |
| 259 .SH "OPTIONS" | |
| 260 .IX Header "OPTIONS" | |
| 261 .IP "\fB\-\-version\fR, \fB\-v\fR" 4 | |
| 262 .IX Item "--version, -v" | |
| 263 Display program version information only. | |
| 264 .IP "\fB\-\-help\fR, \fB\-h\fR" 4 | |
| 265 .IX Item "--help, -h" | |
| 266 Display program usage information only. | |
| 267 .IP "\fB\-\-init\fR, \fB\-i\fR" 4 | |
| 268 .IX Item "--init, -i" | |
| 269 Create an initial access layer hierarchy under \fIroot\fR. | |
| 270 .IP "\fB\-\-nop\fR, \fB\-n\fR" 4 | |
| 271 .IX Item "--nop, -n" | |
| 272 No Operation \*(-- causes \fBopenpkg lsync\fR to not perform any filesystem | |
| 273 operations. In conjunction with \fB\-\-trace\fR you can at least see what | |
| 274 would be executed. | |
| 275 .IP "\fB\-\-quiet\fR, \fB\-q\fR" 4 | |
| 276 .IX Item "--quiet, -q" | |
| 277 Forces \fBopenpkg lsync\fR to perform the operations quietly, i.e., without any | |
| 278 verbose messages. | |
| 279 .IP "\fB\-\-trace\fR, \fB\-t\fR" 4 | |
| 280 .IX Item "--trace, -t" | |
| 281 Forces \fBopenpkg lsync\fR to show what filesystem operations are performed. | |
| 282 .IP "\fB\-\-local\fR, \fB\-l\fR" 4 | |
| 283 .IX Item "--local, -l" | |
| 284 This restricts the operations to a local package area. This option can | |
| 285 only be used if you are physically staying below a package sub-directory | |
| 286 under \fIroot\fR/\fIpkgdir\fR/. For instance, when you are staying in | |
| 287 \&\fIroot\fR/\fIpkgdir\fR/bar or \fIroot\fR/\fIpkgdir\fR/bar/bin and use \fB\-\-local\fR, | |
| 288 all operations are restricted to the package \*(L"bar\*(R". | |
| 289 .IP "\fB\-\-uninstall\fR, \fB\-u\fR" 4 | |
| 290 .IX Item "--uninstall, -u" | |
| 291 This performs only package uninstallation operations, i.e., only | |
| 292 symbolic links are removed. This can be used to completely empty the | |
| 293 access layer. Additionally it is very useful in combination with | |
| 294 \&\fB\-\-local\fR in order to uninstall a particular package without having to | |
| 295 remove its files. | |
| 296 .IP "\fB\-\-root=\fR\fIroot\fR" 4 | |
| 297 .IX Item "--root=root" | |
| 298 Sets the root directory where the access layer and package subdirectory | |
| 299 is located. The default can be determined by running \f(CW\*(C`openpkg lsync \-\-help\*(C'\fR | |
| 300 (see section \*(L"Current configuration\*(R"). | |
| 301 .IP "\fB\-\-pkgdir=\fR\fIpkgdir\fR" 4 | |
| 302 .IX Item "--pkgdir=pkgdir" | |
| 303 Sets the sub-directory under the root directory where packages are | |
| 304 located. The default can be determined by running \f(CW\*(C`openpkg lsync \-\-help\*(C'\fR (see | |
| 305 section \*(L"Current configuration\*(R"). | |
| 306 .IP "\fB\-\-subdirs=\fR\fIsubdirs\fR[,\fIsubdir\fR,...]" 4 | |
| 307 .IX Item "--subdirs=subdirs[,subdir,...]" | |
| 308 Sets one or more sub-directories of the access layer on which \fBopenpkg lsync\fR | |
| 309 should act. The default can be determined by running \f(CW\*(C`openpkg lsync \-\-help\*(C'\fR | |
| 310 (see section \*(L"Current configuration\*(R"). | |
| 311 .SH "RESULTS" | |
| 312 .IX Header "RESULTS" | |
| 313 This program uses the following return codes on exit: 0 (operation | |
| 314 successful), 1 (system error), 2 (command line error) and 3 (other user | |
| 315 error). | |
| 316 .SH "HISTORY" | |
| 317 .IX Header "HISTORY" | |
| 318 The idea of filesystem access layers consisting of symbolic links | |
| 319 pointing to actual package installation areas is a rather old one. It | |
| 320 dates back to the early days of Unix and was implemented many times over | |
| 321 the last decades. One of many implementation was \fBGenOPT\fR, written by | |
| 322 Ralf S. Engelschall for sd&m GmbH & Co \s-1KG\s0, Munich in 1992. The name | |
| 323 indicates the programs purpose: to generate symbolic links in an access | |
| 324 layer which was located under \f(CW\*(C`/opt\*(C'\fR. \fBGenOPT\fR was very flexible, but | |
| 325 hence also very complex. Because of lack of documentation it was never | |
| 326 released and so only used at sd&m and on all machines which were under | |
| 327 control of Ralf S. Engelschall. | |
| 328 .PP | |
| 329 For Cable & Wireless, Munich, the old \fBGenOPT\fR principle was again | |
| 330 needed to manage the \f(CW\*(C`/cw/local\*(C'\fR area on their servers. For this in | |
| 331 November 2000 the functionality of \fBGenOPT\fR was revised, heavily | |
| 332 stripped down and finally implemented from scratch. The result is the | |
| 333 current \fBopenpkg lsync\fR. | |
| 334 .SH "AUTHOR" | |
| 335 .IX Header "AUTHOR" | |
| 336 .Vb 3 | |
| 337 \& Ralf S. Engelschall | |
| 338 \& rse@engelschall.com | |
| 339 \& www.engelschall.com | |
| 340 .Ve |
