Annotation of www/anoncvs.html, Revision 1.34
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1.15 grr 17: <h1>OpenBSD</h1>
18: <hr>
19: <h3>Anonymous CVS Access:</h3>
20: <p>
21: Anonymous CVS is a method of keeping your local copy of the OpenBSD source
22: tree up to date with respect to changes made to current OpenBSD sources.
23: </p>
1.14 downsj 24: <p>
1.15 grr 25: The major advantage of Anonymous CVS over other source code update
26: techniques is that it works directly against a central source code
27: repository or mirror. This means that you have the full set of CVS
28: commands available to control merging and updating your changes with
29: other source changes and for performing diff's, change histories
30: and other queries against the central repository.
31: </p>
32: <h3>CVS:</h3>
1.34 ! kstailey 33: <a href=why-cvs.html>CVS is the source code control system used to manage the OpenBSD source tree.</a>
1.16 deraadt 34: It implements a central repository for all officially released source code
1.15 grr 35: and changes, while permitting developers to maintain local copies of the
36: source code with their working changes. Developers with "write access"
37: can commit changes directly to the OpenBSD source tree, while "Anonymous
38: CVS" users have "read access" and can keep their local copies of the source
39: up to date and issue queries against the central depository.
40: </p>
41: <p>
1.22 niklas 42: The major strength of CVS is that it has the ability to perform intelligent
1.15 grr 43: merges of changes to the central repository with changes that you make to
44: your local copy. This means that if you make a change to a module and
45: perform an update, your changes are not "blown away", rather CVS makes
46: best efforts to merge the changes made to the central sources with changes
47: you've made to your local copy.
48: </p>
49: <p>
50: In the event that the changes can't be completely merged, CVS provides a
51: "soft fallback", in terms of providing you with annotated changes to your
52: local copy, preeserving an unmodified copy of your version and continuing
53: to update any other source modules you requested.
1.1 deraadt 54: </p>
1.22 niklas 55: <p>
1.23 mickey 56: People who own an OpenBSD CD may have seen the CVS/ dirs on it.
1.22 niklas 57: Actually there is a reason, the CD has a checkout of the OpenBSD src/ module
1.23 mickey 58: usable to continue updating from. Using this tree will results in a much
59: faster initial CVS update than a fresh checkout of the full OpenBSD
60: source tree. There are two ways of using the CD:
61: <ul>
62: <li>copy the tree off it, (assuming the CD is mounted on /mnt):
1.22 niklas 63: <pre>
1.23 mickey 64: <b>#</b> cd /mnt; cp -Rp CVS Makefile bin distrib etc games gnu \
65: <b>></b> include kerberosIV lib libexec lkm regress sbin share \
66: <b>></b> sys usr.bin usr.sbin /usr/src
1.22 niklas 67: </pre>
1.23 mickey 68: <li>use a union mount with the CD below a writable directory.
1.22 niklas 69: <pre>
1.23 mickey 70: <b>#</b> mount -t union -o -b /mnt /usr/src
1.22 niklas 71: </pre>
1.23 mickey 72: </ul>
1.22 niklas 73: After this, /usr/src will be a nice checkout area where all cvs(1) commands
74: will work OK.
75: </p>
1.15 grr 76: <h4>CVS COMMAND SUMMARY</h4>
1.27 todd 77: <dt> cvs [cvs args] [cvs command] [cvs command args]
78: <dd> below is a listing of commonly used cvs commands.
1.15 grr 79: <dl>
80: <DT>add
81: <dd>Add a new file or directory to the repository.
82: <dt>get
83: <dd>Make a working directory of source files for editing.
84: <dt>commit
85: <dd>Apply changes to the source repository (write access)
86: <dt>diff
87: <dd>Show differences between local files and the source repository.
88: <dt>history
89: <dd>Show reports on cvs commands against the source repository.
90: <dt>log
91: <dd>Display CVS log information.
92: <dt>rdiff
93: <dd>Prepare a collection of diffs reflecting changes between release.
94: <dt>status
95: <dd>Show current status of files in the repository and local copies.
96: <dt>update
97: <DD>Bring your working directory up to date with the repository.
98: </dl>
1.1 deraadt 99: <p>
1.17 deraadt 100: To summarize, the real strengh of using Anonymous CVS is that it is
1.15 grr 101: a "tolerant" source code control system - it <strong>respects</strong>
102: changes that you have made to your local sources and makes <strong>
103: "best efforts"</strong> to update your entire source tree, rather than
104: leaving you a list of arcane problems that have to be resolved before
105: continuing.
1.1 deraadt 106: </p>
107:
1.15 grr 108: <h3>Using Anonymous CVS:</h3>
1.1 deraadt 109: <p>
110: The latest version of CVS is available at
111: <a href=ftp://ftp.cyclic.com/pub/cvs/>Cyclic</a>.
112: Versions earlier than 1.6 are not recommended, and may not work.
113: If you already have OpenBSD installed, CVS is included.
114: </p>
115:
116: <p>
117: There are two levels of source tree access:
118: </p>
119:
120: <dl>
121: <dt><strong>Read-write access for developers:</strong>
122: <dd>Developers who need to commit changes to the source tree must have
123: an account on the OpenBSD machines. Getting this access will be a
124: natural result of working on the sources with other OpenBSD developers.
125: If someone does some good work and shows they can work with the team,
126: they will get an account.
127: </dl>
128:
129: <dl>
130: <dt><strong>Read-only access for everyone:</strong>
131: <dd>Anyone can access the read-only CVS repositories. These copies
132: of the read-write CVS repository are mirrored often. To use one,
133: set your <strong>CVSROOT</strong> environment variable to one of
134: the following values:
1.12 grr 135: <p>
136: <strong>Please see the note about using ssh vs. rsh below!</strong>
137: <p>
1.1 deraadt 138: <ul>
139: <p>
140: <li><strong>CVSROOT=anoncvs@anoncvs.usa.openbsd.org:/cvs</strong><br>
1.10 millert 141: Host also known as <strong>anoncvs.openbsd.org</strong>,
142: <strong>anoncvs@anoncvs1.usa.openbsd.org</strong>,
143: <strong>anoncvs@anoncvs4.usa.openbsd.org</strong> and
144: <strong>anoncvs2.isc.org</strong>.<br>
145: located in California, western USA.<br>
146: maintained by <a href=mailto:niklas@openbsd.org>Niklas Hallqvist</a>.<br>
147: protocols: ssh only.<br>
1.1 deraadt 148: updated every 4 hours.<br>
149: <p>
150: <li><strong>CVSROOT=anoncvs@anoncvs3.usa.openbsd.org:/cvs</strong><br>
151: Host also known as <strong>freestuff.cs.colorado.edu</strong>.<br>
152: located at the University of Colorado, Boulder, western USA.<br>
153: maintained by <a href=mailto:Todd.Miller@cs.colorado.edu>Todd Miller</a>.<br>
154: protocols: ssh, ssh port 2022.<br>
155: updated every 6 hours.<br>
156: <p>
1.18 todd 157: <li>
158: <strong>CVSROOT=:pserver:anoncvs@anoncvs5.usa.openbsd.org:/cvs</strong><br>
159: Note <a href=#pserver>*pserver usage*</a><br>
160: Host also known as <strong>alpha.ctaz.com</strong>.<br>
1.19 todd 161: located in Arizona, western USA.<br>
1.18 todd 162: maintained by <a href=mailto:todd@openbsd.org>Todd Fries</a>.<br>
163: protocols: :pserver:.<br>
1.20 todd 164: updated every 3 hours midnight to noon; exception is Mon-Wed-Sat with a midnight update, 3am full update, then a noon update.<br>
1.18 todd 165: <p>
1.31 deraadt 166: <li><strong>CVSROOT=anoncvs@anoncvs6.usa.openbsd.org:/cvs</strong><br>
167: Host also known as <strong>openbsd.citi.umich.edu</strong>.<br>
168: located at the University of Michigan, central USA.<br>
169: maintained by <a href=mailto:rees@umich.edu>Jim Rees</a>.<br>
170: protocols: ssh, ssh port 2022.<br>
171: updated every 12 hours.<br>
172: <p>
1.24 deraadt 173: <li><strong>CVSROOT=anoncvs@anoncvs1.ca.openbsd.org:/cvs</strong><br>
1.30 beck 174: Host also known as <strong>panopticon.ucs.ualberta.ca</strong><br>
1.24 deraadt 175: located in Edmonton, Alberta, Canada.<br>
176: maintained by <A HREF="mailto:beck@panopticon.ucs.ualberta.ca">Bob Beck</A><br>
1.32 beck 177: protocols: rsh, ssh, ssh port 2022, pserver<br>
1.30 beck 178: updated every 2 hours.<br>
1.24 deraadt 179: <p>
1.1 deraadt 180: <li><strong>CVSROOT=anoncvs@anoncvs.uk.openbsd.org:/cvs</strong><br>
181: Host also known as <strong>dumpty.wonderland.org</strong>.<br>
182: located in London, UK.<br>
183: maintained by <a href=mailto:peter@wonderland.org>Peter Galbavy</a>.<br>
184: protocols: rsh.<br>
185: updated every 12 hours.<br>
186: <p>
187: <li><strong>CVSROOT=anoncvs@anoncvs.tw.openbsd.org:/cvs</strong><br>
188: Host also known as <strong>hercules.secc.fju.edu.tw</strong>.<br>
189: located in Taipei, Taiwan.<br>
190: maintained by <a href=mailto:shawn@openbsd.org>Shawn Hsiao</a>.<br>
191: protocols: rsh, ssh, ssh port 2022.<br>
192: updated every 12 hours.<br>
193: <p>
194: <li><strong>CVSROOT=anoncvs@anoncvs.no.openbsd.org:/cvs</strong><br>
195: located in Norway.<br>
196: maintained by <a href=mailto:micheals@openbsd.org>Michael Shuldman</a>.<br>
197: protocols: rsh, ssh, ssh port 2022.<br>
198: updated every 4 hours.<br>
199: </ul>
200: <p>
1.33 deraadt 201: <li><strong>CVSROOT=anoncvs@anoncvs.se.openbsd.org:/cvs</strong><br>
202: located in Sweden.<br>
203: maintained by <a href=mailto:anoncvs@stacken.kth.se>Magnus Holmberg</a>.<br>
204: protocols: rsh, ssh, ssh port 2022.<br>
205: updated every 4 hours.<br>
206: </ul>
207: <p>
1.1 deraadt 208: You may want to use `traceroute' to find out which server is nearest you.
1.11 michaels 209: Problems with a server should be reported to the <b>maintainer</b> of the
210: server in question.
1.1 deraadt 211: </dl>
212: </p>
213: <p>
214: <strong>IMPORTANT NOTE:</strong>
215: There are a few issues relating to cryptographic software that everyone
216: should be aware of:
217: <ul>
218: <li>The OpenBSD sources are from Canada.
1.9 deraadt 219: As
220: <a href=http://insight.mcmaster.ca/org/efc/pages/doc/crypto-export.html>
221: researched by a Canadian individual</a>
222: and as
223: <a href=http://axion.physics.ubc.ca/ECL.html>
224: described in the Export Control list of Canada</a>
225: is legal to export crypto software from Canada to the world.
1.1 deraadt 226: <p>
227: <li>However, if you are outside the USA or Canada, you should not
228: fetch the cryptographic sections of the OpenBSD sources from an
229: anoncvs server located in the USA. The files in question are...
230: <ul>
231: <li>src/kerberosIV/*
232: <li>src/lib/libc/crypt/crypt.c
233: <li>src/lib/libc/crypt/morecrypt.c
234: </ul>
235: Because of the USA ITAR munitions list,
236: crypto software may only be exported to Canada from the USA.
237: <p>
238: <li>The OpenBSD project is looking for more anoncvs servers -- read
239: on to find out how you can help.
240: </ul>
241: </p>
242:
243: <p>
244: A sample use of an anoncvs CVS server would be:
1.27 todd 245: <ul>
1.1 deraadt 246: <pre>
247: % setenv CVSROOT anoncvs@anoncvs.usa.openbsd.org:/cvs
248: % cd /tmp
249: % cvs get src/sys/arch/sparc
1.12 grr 250: [copies the files from the repository to your machine]
1.1 deraadt 251: % cvs log src/sys/arch/sparc/sparc/locore.s
1.12 grr 252: [shows the commit log for the chosen file ]
1.1 deraadt 253: % cvs diff -bc -r1.1 -r1.5 src/sys/arch/sparc/sparc/locore.s
1.12 grr 254: [shows the changes between revisions 1.1 and rev 1.5]
1.1 deraadt 255: </pre>
1.27 todd 256: </ul>
1.1 deraadt 257: </p>
258:
259: <p>
1.18 todd 260: <a name=pserver>In order to use a cvs ``pserver'' (a direct tcp connection instead of using ssh or rsh) you must login once:</a>
261: <pre>
262: [ *NOTE* You must be using cvs version 1.8 or higher to do this ]
263: % setenv CVSROOT :pserver:anoncvs@anoncvs5.usa.openbsd.org:/cvs
264: % cvs login
265: (Logging in to anoncvs@anoncvs5.usa.openbsd.org)
266: CVS password: <type whatever you feel like, just type something!>
267: [this writes a line to ~/.cvspass (filename over-ridden by CVS_PASSFILE).]
268: [An example line from my ~/.cvspass after typing 'blah' for the above ]
269: [password is: ]
270: [:pserver:anoncvs@anoncvs5.usa.openbsd.org:/cvs Au'yc ]
271: [...after logging in ONCE every other use of the above CVSROOT will work ]
272: % cvs -z9 get ksrc-i386 ksrc-common
273: [allows you to retrieve ONLY that necessary to rebuild an i386 kernel ]
274: [ -z9 allows gzip -9 compression, GOOD medicine for slow links ]
275: </pre>
276: </p>
277:
278: <p>
1.1 deraadt 279: Here is how someone using anoncvs regularily would update his
280: source tree:
1.27 todd 281: <ul><li>First, startout by `get'-ing an initial tree:
282:
1.1 deraadt 283: <pre>
284: # setenv CVSROOT anoncvs@anoncvs.usa.openbsd.org:/cvs
285: # cd /usr
286: # cvs -q get -PA src
287: </pre>
1.27 todd 288: </li>
289: <li> Anytime afterwards, to `update' this tree:
1.1 deraadt 290: <pre>
1.12 grr 291: # cd /usr
292: # cvs -q up -PAd src
1.1 deraadt 293: </pre>
1.27 todd 294:
1.1 deraadt 295: Everytime you ran this it would syncronize your /usr/src tree. It would
296: not destroy any of your local changes, rather it would attempt to merge
297: changes in. If you use obj directories (not obj symbolic links) you may
298: wish to append "-I obj" to the cvs command line, this will keep cvs from
299: spitting out a warning about all the obj directories it is going to
300: encounter which are not in the repository.
1.27 todd 301: </li>
302: </ul>
303:
304: In the above example, '-q' is optional, only intended to minimize
305: cvs's output. For those who like to see screenfulls of output, it
306: can be omitted.
1.1 deraadt 307: </p>
308:
309: <p>
1.12 grr 310: or to make a diff of a locally patched module (here cd.c) to include with
311: a bug report:
312: <pre>
313: # cd /usr
314: # cvs diff -u src/sys/scsi/cd.c > /tmp/patch
315: </pre>
316: </p>
317:
318: <p>
1.1 deraadt 319: The CVS man page (included with the CVS sources) has much more
320: information about how CVS can be used.
321: </p>
322:
323: <p>
1.12 grr 324: <strong>Warning:</strong>
325: When using cvs you should take care that your current directory is either
326: the root of the tree you're referencing or in a separate place such as /tmp.
327: Some commands such as "get" can create an arbitrary sub-tree in the current
328: directory, and a subsequent update will recursively flesh out this sub-tree.
329: </p>
330:
331: <p>
1.1 deraadt 332: The anoncvs service gives fledgling developers a chance to learn CVS
333: operation and get thoroughly involved in the development process
334: before getting "commit" access -- as a result of showing useful
335: skills and high quality results they will naturally later be given
336: developer access. As well, people providing patches can create
337: their "diff"s relative to the CVS tree, which will ease integration.
338: </p>
339:
340: <p>
1.15 grr 341: <strong>Anoncvs: rsh vs. ssh</strong>
1.12 grr 342: <br>
343: By default, the CVS client uses rsh to talk to the CVS server. Many
344: of the CVS sites no longer supprt rsh for security reasons or a local
345: problem like a firewall or imperfect protocol emulator such as slirp
346: may prevent you from using rsh.
347: The alternative is a to use a "secure shell" connection using
348: <a href=http://www.cs.hut.fi/ssh>ssh</a>. This is a commerical product
349: offered by <a href=http://www.ssh.fi>SSH Communications Security Ltd</a>,
350: however they make a free unix version available that can be easily
351: installed under OpenBSD. You can download the unix version from
352: <a href=http://www.cs.hut.fi/ssh>http://www.cs.hut.fi/ssh</a> or one of
353: the mirrors listed there.
354: </p>
1.28 beck 355:
356: <p> In this case, one sets the environment variable
357: <strong>CVS_RSH</strong> to point to ssh (typically
358: <strong>/usr/local/bin/ssh</strong>). If your local site prevents you
359: from connecting out to port 22 (which ssh defaults to using) use port
360: 2022.
1.1 deraadt 361: </p>
362:
363: <p>
364: Do not be tempted to turn on compression since CVS already compresses.
365: Use something like the following in your <strong>$HOME/.ssh/config</strong>
1.10 millert 366: file. Note that not all anoncvs servers allow ssh connections on
1.21 millert 367: port 2022. Also note that most anoncvs servers no longer accept
368: the <strong>none</strong> cipher as it is disabled in recent
369: versions of ssh for security reasons.
1.1 deraadt 370: </p>
371: <pre>
372: Host anoncvs.usa.openbsd.org
373: Port 2022
374: </pre>
375:
376: <p>
377: CVS is a little noisy starting up; to quiet it a bit you may want to
378: do this:
379: <pre>
380: setenv CVS_CLIENT_PORT -1
381: </pre>
382: </p>
383:
384: <p>
1.8 deraadt 385: If you wish to change from one CVS server to another (say your normal one is
386: down, or for any other reason), the environment variable which will let you
387: do this is
388: <pre>
389: setenv CVS_IGNORE_REMOTE_ROOT
390: </pre>
391: </p>
392:
393: <p>
1.1 deraadt 394: If you wish to be a new anoncvs mirror site, please contact the anoncvs
395: <a href=mailto:deraadt@theos.com>maintainer</a>.
1.30 beck 396: Anoncvs mirrors require about 500MB of disk, and use up to 4MB of swap
1.1 deraadt 397: per anoncvs user (assuming the user does a large operation; while smaller
398: operations use fewer resources, anoncvs still makes much more of an
399: impact than ftp or sup). Such anoncvs machines should have excellent
400: network connectivity for the area they are expected to serve. A
401: <a href=anoncvs.shar>document</a>
402: which describes the setup of anoncvs servers is available.
403: </p>
404:
405: </dl>
406:
407: <hr>
1.3 deraadt 408: <a href=index.html><img src=back.gif border=0 alt=OpenBSD></a>
1.1 deraadt 409: <a href=mailto:www@openbsd.org>www@openbsd.org</a>
1.34 ! kstailey 410: <br><small>$OpenBSD: anoncvs.html,v 1.33 1997/11/03 21:23:47 deraadt Exp $</small>
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