CVS(1)                                                                  CVS(1)

NAME
cvs - Concurrent Versions System

SYNOPSIS
cvs [ cvs_options ]
cvs_command [ command_options ] [ command_args ]

NOTE
This  manpage is a summary of some of the features of cvs.  It is auto-
generated from an appendix of the CVS manual.  For more in-depth  docu-
mentation,  please consult the Cederqvist manual (via the info CVS com-
mand or otherwise, as described in the SEE ALSO section  of  this  man-
page).  Cross-references in this man page refer to nodes in the same.

CVS commands
Guide to CVS commands
This  appendix  describes  the  overall  structure of cvs commands, and
describes some commands in detail (others are described elsewhere;  for
a  quick  reference to cvs commands, see node Invoking CVS' in the CVS
manual).

Structure
Overall structure of CVS commands
The overall format of all cvs commands is:

cvs [ cvs_options ] cvs_command [ command_options ] [ command_args ]

cvs

The name of the cvs program.

cvs_options

Some  options  that  affect  all  sub-commands  of  cvs.   These  are
described below.

cvs_command

One  of  several  different  sub-commands.  Some of the commands have
aliases that can be used instead; those aliases are noted in the ref-
erence  manual for that command.  There are only two situations where
you may omit cvs_command: cvs -H elicits a  list  of  available  com-
mands, and cvs -v displays version information on cvs itself.

command_options

Options that are specific for the command.

command_args

Arguments to the commands.

There  is  unfortunately  some confusion between cvs_options and com-
mand_options.  When given as a cvs_option, some options  only  affect
some  of  the commands.  When given as a command_option it may have a
different meaning, and be accepted by more commands.  In other words,
do not take the above categorization too seriously.  Look at the doc-

Exit status
CVS's exit status
cvs can indicate to the calling environment  whether  it  succeeded  or
failed  by  setting its exit status.  The exact way of testing the exit
status will vary from one operating system to another.  For example  in
a  unix  shell  script  the  $? variable will be 0 if the last command returned a successful exit status, or greater than 0 if the exit status indicated failure. If cvs is successful, it returns a successful status; if there is an error, it prints an error message and returns a failure status. The one exception to this is the cvs diff command. It will return a suc- cessful status if it found no differences, or a failure status if there were differences or if there was an error. Because this behavior pro- vides no good way to detect errors, in the future it is possible that cvs diff will be changed to behave like the other cvs commands. ~/.cvsrc Default options and the ~/.cvsrc file There are some command_options that are used so often that you might have set up an alias or some other means to make sure you always spec- ify that option. One example (the one that drove the implementation of the .cvsrc support, actually) is that many people find the default out- put of the diff command to be very hard to read, and that either con- text diffs or unidiffs are much easier to understand. The ~/.cvsrc file is a way that you can add default options to cvs_com- mands within cvs, instead of relying on aliases or other shell scripts. The format of the ~/.cvsrc file is simple. The file is searched for a line that begins with the same name as the cvs_command being executed. If a match is found, then the remainder of the line is split up (at whitespace characters) into separate options and added to the command arguments before any options from the command line. If a command has two names (e.g., checkout and co), the official name, not necessarily the one used on the command line, will be used to match against the file. So if this is the contents of the user's ~/.cvsrc file: log -N diff -uN rdiff -u update -Pd checkout -P release -d the command cvs checkout foo would have the -P option added to the arguments, as well as cvs co foo. With the example file above, the output from cvs diff foobar will be in unidiff format. cvs diff -c foobar will provide context diffs, as usual. Getting "old" format diffs would be slightly more complicated, because diff doesn't have an option to specify use of the "old" format, so you would need cvs -f diff foobar. In place of the command name you can use cvs to specify global options (see node Global options' in the CVS manual). For example the follow- ing line in .cvsrc cvs -z6 causes cvs to use compression level 6. Global options The available cvs_options (that are given to the left of cvs_command) are: --allow-root=rootdir Specify legal cvsroot directory. See see node Password authentica- tion server' in the CVS manual. -a Authenticate all communication between the client and the server. Only has an effect on the cvs client. As of this writing, this is only implemented when using a GSSAPI connection (see node GSSAPI authenticated' in the CVS manual). Authentication prevents certain sorts of attacks involving hijacking the active tcp connection. Enabling authentication does not enable encryption. -b bindir In cvs 1.9.18 and older, this specified that rcs programs are in the bindir directory. Current versions of cvs do not run rcs programs; for compatibility this option is accepted, but it does nothing. -T tempdir Use tempdir as the directory where temporary files are located. Overrides the setting of the$TMPDIR  environment  variable  and  any
precompiled  directory.   This  parameter  should  be specified as an
absolute pathname.  (When running client/server, -T affects only  the
local  process;  specifying  -T  for  the client has no effect on the
server and vice versa.)

-d cvs_root_directory

Use cvs_root_directory as the root directory pathname of the  reposi-
tory.   Overrides  the  setting of the $CVSROOT environment variable. see node Repository' in the CVS manual. -e editor Use editor to enter revision log information. Overrides the setting of the$CVSEDITOR and $EDITOR environment variables. For more infor- mation, see see node Committing your changes' in the CVS manual. -f Do not read the ~/.cvsrc file. This option is most often used because of the non-orthogonality of the cvs option set. For example, the cvs log option -N (turn off display of tag names) does not have a corresponding option to turn the display on. So if you have -N in the ~/.cvsrc entry for log, you may need to use -f to show the tag names. -H --help Display usage information about the specified cvs_command (but do not actually execute the command). If you don't specify a command name, cvs -H displays overall help for cvs, including a list of other help options. -n Do not change any files. Attempt to execute the cvs_command, but only to issue reports; do not remove, update, or merge any existing files, or create any new files. Note that cvs will not necessarily produce exactly the same output as without -n. In some cases the output will be the same, but in other cases cvs will skip some of the processing that would have been required to produce the exact same output. -Q Cause the command to be really quiet; the command will only generate output for serious problems. -q Cause the command to be somewhat quiet; informational messages, such as reports of recursion through subdirectories, are suppressed. -r Make new working files read-only. Same effect as if the$CVSREAD
environment variable is set (see node Environment variables' in  the
CVS  manual).   The default is to make working files writable, unless
watches are on (see node Watches' in the CVS manual).

-s variable=value

Set a user variable (see node Variables' in the CVS manual).

-t

Trace program execution; display messages showing the  steps  of  cvs
activity.   Particularly  useful  with  -n  to  explore the potential
impact of an unfamiliar command.

-v

--version

Display version and copyright information for cvs.

-w

Make new working files read-write.   Overrides  the  setting  of  the
$CVSREAD environment variable. Files are created read-write by default, unless$CVSREAD is set or -r is given.

-x

Encrypt all communication between the client and  the  server.   Only
has  an  effect  on the cvs client.  As of this writing, this is only
implemented when using a GSSAPI connection (see node GSSAPI  authen-
ticated'  in the CVS manual) or a Kerberos connection (see node Ker-
beros authenticated' in the CVS manual).  Enabling encryption implies
that  message  traffic  is also authenticated.  Encryption support is
not available by default; it must be enabled using a special  config-
ure option, --enable-encryption, when you build cvs.

-z gzip-level

Set  the compression level.  Valid levels are 1 (high speed, low com-
pression) to 9 (low speed, high compression), or 0  to  disable  com-
pression (the default).  Only has an effect on the cvs client.

Common options
Common command options
This  section  describes  the command_options that are available across
several cvs commands.  These options are always given to the  right  of
cvs_command. Not all commands support all of these options; each option
is only supported for commands where it makes sense.  However,  when  a
command  has  one  of  these options you can almost always count on the
same behavior of the option  as  in  other  commands.   (Other  command
options,  which  are listed with the individual commands, may have dif-
ferent behavior from one cvs command to the other).

The history command is an exception; it supports many options that con-
flict even with these standard options.

-D date_spec

Use the most recent revision no later than date_spec.  date_spec is a
single argument, a date description specifying a date in the past.

The specification is sticky when you use it to make a private copy of
a  source  file;  that  is, when you get a working file using -D, cvs
records the date you specified, so that further updates in  the  same
tags/dates, see node Sticky tags' in the CVS manual).

-D is available with the annotate, checkout, diff,  export,  history,
rdiff,  rtag,  and  update  commands.  (The history command uses this
option in a slightly different way; see node history options' in the
CVS manual).

A  wide variety of date formats are supported by cvs.  The most stan-
dard ones are ISO8601 (from the International Standards Organization)
and  the  Internet e-mail standard (specified in RFC822 as amended by
RFC1123).

ISO8601 dates have many variants but a few examples are:

1972-09-24
1972-09-24 20:05

There are a lot more ISO8601 date formats, and cvs  accepts  many  of
them, but you probably don't want to hear the whole long story :-).

In  addition to the dates allowed in Internet e-mail itself, cvs also
allows some of the fields to be omitted.  For example:

24 Sep 1972 20:05
24 Sep

The date is interpreted as being in the local timezone, unless a spe-
cific timezone is specified.

These two date formats are preferred.  However, cvs currently accepts
a wide variety of other date formats.   They  are  intentionally  not
documented  here  in any detail, and future versions of cvs might not
accept all of them.

One such format is month/day/year.  This may confuse people  who  are
accustomed  to having the month and day in the other order; 1/4/96 is
January 4, not April 1.

Remember to quote the argument to the -D  flag  so  that  your  shell
doesn't interpret spaces as argument separators.  A command using the
-D flag can look like this:

$cvs diff -D "1 hour ago" cvs.texinfo -f When you specify a particular date or tag to cvs commands, they nor- mally ignore files that do not contain the tag (or did not exist prior to the date) that you specified. Use the -f option if you want files retrieved even when there is no match for the tag or date. (The most recent revision of the file will be used). Note that even with -f, a tag that you specify must exist (that is, in some file, not necessary in every file). This is so that cvs will continue to give an error if you mistype a tag name. -f is available with these commands: annotate, checkout, export, rdiff, rtag, and update. WARNING: The commit and remove commands also have a -f option, but it has a different behavior for those commands. See see node commit options' in the CVS manual, and see node Removing files' in the CVS manual. -k kflag Alter the default processing of keywords. see node Keyword substi- tution' in the CVS manual, for the meaning of kflag. Your kflag specification is sticky when you use it to create a private copy of a source file; that is, when you use this option with the checkout or update commands, cvs associates your selected kflag with the file, and continues to use it with future update commands on the same file until you specify otherwise. The -k option is available with the add, checkout, diff, rdiff, import and update commands. -l Local; run only in current working directory, rather than recursing through subdirectories. Available with the following commands: annotate, checkout, commit, diff, edit, editors, export, log, rdiff, remove, rtag, status, tag, unedit, update, watch, and watchers. -m message Use message as log information, instead of invoking an editor. Available with the following commands: add, commit and import. -n Do not run any tag program. (A program can be specified to run in the modules database (see node modules' in the CVS manual); this option bypasses it). This is not the same as the cvs -n program option, which you can specify to the left of a cvs command! Available with the checkout, export, and rtag commands. -P Prune empty directories. See see node Removing directories' in the CVS manual. -p Pipe the files retrieved from the repository to standard output, rather than writing them in the current directory. Available with the checkout and update commands. -R Process directories recursively. This is on by default. Available with the following commands: annotate, checkout, commit, diff, edit, editors, export, rdiff, remove, rtag, status, tag, unedit, update, watch, and watchers. -r tag Use the revision specified by the tag argument instead of the default head revision. As well as arbitrary tags defined with the tag or rtag command, two special tags are always available: HEAD refers to the most recent version available in the repository, and BASE refers to the revision you last checked out into the current working direc- tory. The tag specification is sticky when you use this with checkout or update to make your own copy of a file: cvs remembers the tag and continues to use it on future update commands, until you specify oth- erwise (for more information on sticky tags/dates, see node Sticky tags' in the CVS manual). The tag can be either a symbolic or numeric tag, as described in see node Tags' in the CVS manual, or the name of a branch, as described in see node Branching and merging' in the CVS manual. When a com- mand expects a specific revision, the name of a branch is interpreted as the most recent revision on that branch. Specifying the -q global option along with the -r command option is often useful, to suppress the warning messages when the rcs file does not contain the specified tag. This is not the same as the overall cvs -r option, which you can specify to the left of a cvs command! -r is available with the annotate, checkout, commit, diff, history, export, rdiff, rtag, and update commands. -W Specify file names that should be filtered. You can use this option repeatedly. The spec can be a file name pattern of the same type that you can specify in the .cvswrappers file. Available with the following commands: import, and update. admin Administration o Requires: repository, working directory. o Changes: repository. o Synonym: rcs This is the cvs interface to assorted administrative facilities. Some of them have questionable usefulness for cvs but exist for his- torical purposes. Some of the questionable options are likely to disappear in the future. This command does work recursively, so extreme care should be used. On unix, if there is a group named cvsadmin, only members of that group can run cvs admin (except for the cvs admin -k command, which can be run by anybody). This group should exist on the server, or any system running the non-client/server cvs. To disallow cvs admin for all users, create a group with no users in it. On NT, the cvsad- min feature does not exist and all users can run cvs admin. admin options Some of these options have questionable usefulness for cvs but exist for historical purposes. Some even make it impossible to use cvs until you undo the effect! -Aoldfile Might not work together with cvs. Append the access list of oldfile to the access list of the rcs file. -alogins Might not work together with cvs. Append the login names appearing in the comma-separated list logins to the access list of the rcs file. -b[rev] Set the default branch to rev. In cvs, you normally do not manipu- late default branches; sticky tags (see node Sticky tags' in the CVS manual) are a better way to decide which branch you want to work on. There is one reason to run cvs admin -b: to revert to the vendor's version when using vendor branches (see node Reverting local changes' in the CVS manual). There can be no space between -b and its argument. -cstring Sets the comment leader to string. The comment leader is not used by current versions of cvs or rcs 5.7. Therefore, you can almost surely not worry about it. see node Keyword substitution' in the CVS man- ual. -e[logins] Might not work together with cvs. Erase the login names appearing in the comma-separated list logins from the access list of the RCS file. If logins is omitted, erase the entire access list. There can be no space between -e and its argument. -I Run interactively, even if the standard input is not a terminal. This option does not work with the client/server cvs and is likely to disappear in a future release of cvs. -i Useless with cvs. This creates and initializes a new rcs file, with- out depositing a revision. With cvs, add files with the cvs add com- mand (see node Adding files' in the CVS manual). -ksubst Set the default keyword substitution to subst. see node Keyword substitution' in the CVS manual. Giving an explicit -k option to cvs update, cvs export, or cvs checkout overrides this default. -l[rev] Lock the revision with number rev. If a branch is given, lock the latest revision on that branch. If rev is omitted, lock the latest revision on the default branch. There can be no space between -l and its argument. This can be used in conjunction with the rcslock.pl script in the contrib directory of the cvs source distribution to provide reserved checkouts (where only one user can be editing a given file at a time). See the comments in that file for details (and see the README file in that directory for disclaimers about the unsupported nature of contrib). According to comments in that file, locking must set to strict (which is the default). -L Set locking to strict. Strict locking means that the owner of an RCS file is not exempt from locking for checkin. For use with cvs, strict locking must be set; see the discussion under the -l option above. -mrev:msg Replace the log message of revision rev with msg. -Nname[:[rev]] Act like -n, except override any previous assignment of name. For use with magic branches, see see node Magic branch numbers' in the CVS manual. -nname[:[rev]] Associate the symbolic name name with the branch or revision rev. It is normally better to use cvs tag or cvs rtag instead. Delete the symbolic name if both : and rev are omitted; otherwise, print an error message if name is already associated with another number. If rev is symbolic, it is expanded before association. A rev consisting of a branch number followed by a . stands for the current latest revision in the branch. A : with an empty rev stands for the current latest revision on the default branch, normally the trunk. For exam- ple, cvs admin -nname: associates name with the current latest revi- sion of all the RCS files; this contrasts with cvs admin -nname:$
which associates name with the revision numbers extracted  from  key-
word strings in the corresponding working files.

-orange

Deletes (outdates) the revisions given by range.

Note that this command can be quite dangerous unless you know exactly
what you are doing (for example see the warnings below about how  the
rev1:rev2 syntax is confusing).

If you are short on disc this option might help you.  But think twice
before using it--there is no way short of restoring the latest backup
to  undo  this  command!   If you delete different revisions than you
planned, either due to carelessness or (heaven  forbid)  a  cvs  bug,
there is no opportunity to correct the error before the revisions are
deleted.  It probably would be a good idea to experiment on a copy of
the repository first.

Specify range in one of the following ways:

rev1::rev2

Collapse  all  revisions  between  rev1  and rev2, so that cvs only
stores the differences associated with going from rev1 to rev2, not
intermediate  steps.   For  example,  after  -o  1.3::1.5  one  can
retrieve revision 1.3, revision 1.5, or the differences to get from
1.3  to  1.5,  but not the revision 1.4, or the differences between
1.3 and 1.4.  Other examples: -o 1.3::1.4 and -o 1.3::1.3  have  no
effect, because there are no intermediate revisions to remove.

::rev

Collapse  revisions  between the beginning of the branch containing
rev and rev itself.  The branchpoint and rev are left intact.   For
example,  -o  ::1.3.2.6 deletes revision 1.3.2.1, revision 1.3.2.5,
and everything in between, but leaves 1.3 and 1.3.2.6 intact.

rev::

Collapse revisions between rev and the end of the branch containing
rev.  Revision rev is left intact but the head revision is deleted.

rev

Delete the revision rev.  For example, -o 1.3 is equivalent  to  -o
1.2::1.4.

rev1:rev2

Delete  the  revisions  from  rev1  to rev2, inclusive, on the same
branch.  One will not be able to retrieve rev1 or rev2  or  any  of
the  revisions  in  between.   For  example,  the command cvs admin
-oR_1_01:R_1_02 . is rarely useful.  It means to  delete  revisions
up  to,  and  including, the tag R_1_02.  But beware!  If there are
files that have not changed between R_1_02 and R_1_03 the file will
have the same numerical revision number assigned to the tags R_1_02
and R_1_03.  So not only will it be impossible to retrieve  R_1_02;
R_1_03 will also have to be restored from the tapes!  In most cases
you want to specify rev1::rev2 instead.

:rev

Delete revisions from the beginning of the branch containing rev up
to and including rev.

rev:

Delete  revisions  from  revision rev, including rev itself, to the
end of the branch containing rev.

None of the revisions to be deleted may have branches or locks.

If any of the revisions to be deleted have symbolic names, and  one
specifies  one  of the :: syntaxes, then cvs will give an error and
not delete any revisions.  If you really want to  delete  both  the
symbolic  names  and the revisions, first delete the symbolic names
with cvs tag -d, then run cvs  admin  -o.   If  one  specifies  the
non-::  syntaxes,  then cvs will delete the revisions but leave the
symbolic names pointing to nonexistent revisions.  This behavior is
preserved  for  compatibility  with  previous  versions of cvs, but
because it isn't very useful, in the future it  may  change  to  be
like the :: case.

Due to the way cvs handles branches rev cannot be specified symbol-
ically if it is a branch.  see node Magic branch numbers'  in  the
CVS manual, for an explanation.

Make  sure  that  no-one has checked out a copy of the revision you
outdate.  Strange things will happen if he starts to  edit  it  and
tries  to  check it back in.  For this reason, this option is not a
good way to take back a bogus commit; commit a new revision undoing
the  bogus  change instead (see node Merging two revisions' in the
CVS manual).

-q

Run quietly; do not print diagnostics.

-sstate[:rev]

Useful with cvs.  Set the state attribute  of  the  revision  rev  to
state.  If rev is a branch number, assume the latest revision on that
branch.  If rev is omitted, assume the latest revision on the default
branch.   Any  identifier  is  acceptable for state.  A useful set of
states is Exp (for experimental), Stab (for  stable),  and  Rel  (for
released).   By  default,  the  state of a new revision is set to Exp
when it is created.  The state is visible in the output from cvs  log
(see node log' in the CVS manual), and in the $Log$ and $State$ key-
words (see node Keyword substitution' in the CVS manual).  Note that
cvs uses the dead state for its own purposes (see node Attic' in the
CVS manual); to take a file to or from the dead  state  use  commands
like  cvs  remove  and cvs add (see node Adding and removing' in the
CVS manual), not cvs admin -s.

-t[file]

Useful with cvs.  Write descriptive text from  the  contents  of  the
named  file  into the RCS file, deleting the existing text.  The file
pathname may not begin with -.  The descriptive text can be  seen  in
the  output  from  cvs log (see node log' in the CVS manual).  There
can be no space between -t and its argument.

If file is omitted, obtain the text from standard  input,  terminated
by  end-of-file  or by a line containing . by itself.  Prompt for the
text if interaction is possible; see -I.

-t-string

Similar to -tfile. Write descriptive text from the  string  into  the
rcs  file, deleting the existing text.  There can be no space between
-t and its argument.

-U

Set locking to non-strict.  Non-strict locking means that  the  owner
of  a  file  need not lock a revision for checkin.  For use with cvs,
strict locking must be set; see the discussion under  the  -l  option
above.

-u[rev]

See  the  option -l above, for a discussion of using this option with
cvs.  Unlock the revision with number rev.  If  a  branch  is  given,
unlock the latest revision on that branch.  If rev is omitted, remove
the latest lock held by the caller.  Normally, only the locker  of  a
revision may unlock it; somebody else unlocking a revision breaks the
lock.  This causes the original locker to be sent a commit  notifica-
tion  (see  node Getting Notified' in the CVS manual).  There can be
no space between -u and its argument.

-Vn

In previous versions of cvs, this option meant to write an  rcs  file
which  would  be  acceptable to rcs version n, but it is now obsolete
and specifying it will produce an error.

-xsuffixes

In previous versions of cvs, this was documented as a way of specify-
ing  the  names  of  the rcs files.  However, cvs has always required
that the rcs files used by cvs end in ,v, so this  option  has  never
done anything useful.

annotate
What revision modified each line of a file?
o Synopsis: annotate [options] files...

o Requires: repository.

o Changes: nothing.

For  each  file  in  files,  print  the  head  revision of the trunk,
together with information on the last modification for each line.

annotate options
These standard options are supported  by  annotate  (see  node  Common
options' in the CVS manual, for a complete description of them):

-l

Local directory only, no recursion.

-R

Process directories recursively.

-f

-F

Annotate binary files.

-r revision

Annotate file as of specified revision/tag.

-D date

Annotate file as of specified date.

annotate example
For example:

$cvs annotate ssfile Annotations for ssfile *************** 1.1 (mary 27-Mar-96): ssfile line 1 1.2 (joe 28-Mar-96): ssfile line 2 The file ssfile currently contains two lines. The ssfile line 1 line was checked in by mary on March 27. Then, on March 28, joe added a line ssfile line 2, without modifying the ssfile line 1 line. This report doesn't tell you anything about lines which have been deleted or replaced; you need to use cvs diff for that (see node diff' in the CVS manual). The options to cvs annotate are listed in see node Invoking CVS' in the CVS manual, and can be used to select the files and revisions to annotate. The options are described in more detail there and in see node Common options' in the CVS manual. checkout Check out sources for editing o Synopsis: checkout [options] modules... o Requires: repository. o Changes: working directory. o Synonyms: co, get Create or update a working directory containing copies of the source files specified by modules. You must execute checkout before using most of the other cvs commands, since most of them operate on your working directory. The modules are either symbolic names for some collection of source directories and files, or paths to directories or files in the repos- itory. The symbolic names are defined in the modules file. see node modules' in the CVS manual. Depending on the modules you specify, checkout may recursively create directories and populate them with the appropriate source files. You can then edit these source files at any time (regardless of whether other software developers are editing their own copies of the sources); update them to include new changes applied by others to the source repository; or commit your work as a permanent change to the source repository. Note that checkout is used to create directories. The top-level directory created is always added to the directory where checkout is invoked, and usually has the same name as the specified module. In the case of a module alias, the created sub-directory may have a dif- ferent name, but you can be sure that it will be a sub-directory, and that checkout will show the relative path leading to each file as it is extracted into your private work area (unless you specify the -Q global option). The files created by checkout are created read-write, unless the -r option to cvs (see node Global options' in the CVS manual) is speci- fied, the CVSREAD environment variable is specified (see node Envi- ronment variables' in the CVS manual), or a watch is in effect for that file (see node Watches' in the CVS manual). Note that running checkout on a directory that was already built by a prior checkout is also permitted. This is similar to specifying the -d option to the update command in the sense that new directories that have been created in the repository will appear in your work area. However, checkout takes a module name whereas update takes a directory name. Also to use checkout this way it must be run from the top level directory (where you originally ran checkout from), so before you run checkout to update an existing directory, don't forget to change your directory to the top level directory. For the output produced by the checkout command see see node update output' in the CVS manual. checkout options These standard options are supported by checkout (see node Common options' in the CVS manual, for a complete description of them): -D date Use the most recent revision no later than date. This option is sticky, and implies -P. See see node Sticky tags' in the CVS man- ual, for more information on sticky tags/dates. -f Only useful with the -D date or -r tag flags. If no matching revi- sion is found, retrieve the most recent revision (instead of ignoring the file). -k kflag Process keywords according to kflag. See see node Keyword substitu- tion' in the CVS manual. This option is sticky; future updates of this file in this working directory will use the same kflag. The status command can be viewed to see the sticky options. See see node Invoking CVS' in the CVS manual, for more information on the status command. -l Local; run only in current working directory. -n Do not run any checkout program (as specified with the -o option in the modules file; see node modules' in the CVS manual). -P Prune empty directories. See see node Moving directories' in the CVS manual. -p Pipe files to the standard output. -R Checkout directories recursively. This option is on by default. -r tag Use revision tag. This option is sticky, and implies -P. See see node Sticky tags' in the CVS manual, for more information on sticky tags/dates. In addition to those, you can use these special command options with checkout: -A Reset any sticky tags, dates, or -k options. Does not reset sticky -k options on modified files. See see node Sticky tags' in the CVS manual, for more information on sticky tags/dates. -c Copy the module file, sorted, to the standard output, instead of cre- ating or modifying any files or directories in your working direc- tory. -d dir Create a directory called dir for the working files, instead of using the module name. In general, using this flag is equivalent to using mkdir dir; cd dir followed by the checkout command without the -d flag. There is an important exception, however. It is very convenient when checking out a single item to have the output appear in a directory that doesn't contain empty intermediate directories. In this case only, cvs tries to shorten'' pathnames to avoid those empty direc- tories. For example, given a module foo that contains the file bar.c, the command cvs co -d dir foo will create directory dir and place bar.c inside. Similarly, given a module bar which has subdirectory baz wherein there is a file quux.c, the command cvs co -d dir bar/baz will create directory dir and place quux.c inside. Using the -N flag will defeat this behavior. Given the same module definitions above, cvs co -N -d dir foo will create directories dir/foo and place bar.c inside, while cvs co -N -d dir bar/baz will create directories dir/bar/baz and place quux.c inside. -j tag With two -j options, merge changes from the revision specified with the first -j option to the revision specified with the second j option, into the working directory. With one -j option, merge changes from the ancestor revision to the revision specified with the -j option, into the working directory. The ancestor revision is the common ancestor of the revision which the working directory is based on, and the revision specified in the -j option. In addition, each -j option can contain an optional date specifica- tion which, when used with branches, can limit the chosen revision to one within a specific date. An optional date is specified by adding a colon (:) to the tag: -jSymbolic_Tag:Date_Specifier. see node Branching and merging' in the CVS manual. -N Only useful together with -d dir. With this option, cvs will not shorten'' module paths in your working directory when you check out a single module. See the -d flag for examples and a discussion. -s Like -c, but include the status of all modules, and sort it by the status string. see node modules' in the CVS manual, for info about the -s option that is used inside the modules file to set the module status. checkout examples Get a copy of the module tc:$ cvs checkout tc

Get a copy of the module tc as it looked one day ago:

$cvs checkout -D yesterday tc commit Check files into the repository o Synopsis: commit [-lRf] [-m 'log_message' | -F file] [-r revision] [files...] o Requires: working directory, repository. o Changes: repository. o Synonym: ci Use commit when you want to incorporate changes from your working source files into the source repository. If you don't specify particular files to commit, all of the files in your working current directory are examined. commit is careful to change in the repository only those files that you have really changed. By default (or if you explicitly specify the -R option), files in subdirectories are also examined and committed if they have changed; you can use the -l option to limit commit to the current directory only. commit verifies that the selected files are up to date with the cur- rent revisions in the source repository; it will notify you, and exit without committing, if any of the specified files must be made cur- rent first with update (see node update' in the CVS manual). commit does not call the update command for you, but rather leaves that for you to do when the time is right. When all is well, an editor is invoked to allow you to enter a log message that will be written to one or more logging programs (see node modules' in the CVS manual, and see node loginfo' in the CVS manual) and placed in the rcs file inside the repository. This log message can be retrieved with the log command; see see node log' in the CVS manual. You can specify the log message on the command line with the -m message option, and thus avoid the editor invocation, or use the -F file option to specify that the argument file contains the log message. commit options These standard options are supported by commit (see node Common options' in the CVS manual, for a complete description of them): -l Local; run only in current working directory. -R Commit directories recursively. This is on by default. -r revision Commit to revision. revision must be either a branch, or a revision on the main trunk that is higher than any existing revision number (see node Assigning revisions' in the CVS manual). You cannot com- mit to a specific revision on a branch. commit also supports these options: -F file Read the log message from file, instead of invoking an editor. -f Note that this is not the standard behavior of the -f option as defined in see node Common options' in the CVS manual. Force cvs to commit a new revision even if you haven't made any changes to the file. If the current revision of file is 1.7, then the following two commands are equivalent:$ cvs commit -f file
$cvs commit -r 1.8 file The -f option disables recursion (i.e., it implies -l). To force cvs to commit a new revision for all files in all subdirectories, you must use -f -R. -m message Use message as the log message, instead of invoking an editor. commit examples Committing to a branch You can commit to a branch revision (one that has an even number of dots) with the -r option. To create a branch revision, use the -b option of the rtag or tag commands (see node Branching and merging' in the CVS manual). Then, either checkout or update can be used to base your sources on the newly created branch. From that point on, all com- mit changes made within these working sources will be automatically added to a branch revision, thereby not disturbing main-line develop- ment in any way. For example, if you had to create a patch to the 1.2 version of the product, even though the 2.0 version is already under development, you might do:$ cvs rtag -b -r FCS1_2 FCS1_2_Patch product_module
$cvs checkout -r FCS1_2_Patch product_module$ cd product_module
[[ hack away ]]
$cvs commit This works automatically since the -r option is sticky. Creating the branch after editing Say you have been working on some extremely experimental software, based on whatever revision you happened to checkout last week. If oth- ers in your group would like to work on this software with you, but without disturbing main-line development, you could commit your change to a new branch. Others can then checkout your experimental stuff and utilize the full benefit of cvs conflict resolution. The scenario might look like: [[ hacked sources are present ]]$ cvs tag -b EXPR1
$cvs update -r EXPR1$ cvs commit

The  update  command will make the -r EXPR1 option sticky on all files.
Note that your changes to the files will never be removed by the update
command.   The  commit will automatically commit to the correct branch,
because the -r is sticky.  You could also do like this:

[[ hacked sources are present ]]
$cvs tag -b EXPR1$ cvs commit -r EXPR1

but then, only those files that were changed by you will  have  the  -r
EXPR1 sticky flag.  If you hack away, and commit without specifying the
-r EXPR1 flag, some files may accidentally end up on the main trunk.

To work with you on the experimental change, others would simply do

cvs checkout -r EXPR1 whatever_module diff Show differences between revisions o Synopsis: diff [-lR] [-k kflag] [format_options] [[-r rev1 | -D date1] [-r rev2 | -D date2]] [files...] o Requires: working directory, repository. o Changes: nothing. The diff command is used to compare different revisions of files. The default action is to compare your working files with the revi- sions they were based on, and report any differences that are found. If any file names are given, only those files are compared. If any directories are given, all files under them will be compared. The exit status for diff is different than for other cvs commands; for details see node Exit status' in the CVS manual. diff options These standard options are supported by diff (see node Common options' in the CVS manual, for a complete description of them): -D date Use the most recent revision no later than date. See -r for how this affects the comparison. -k kflag Process keywords according to kflag. See see node Keyword substitu- tion' in the CVS manual. -l Local; run only in current working directory. -R Examine directories recursively. This option is on by default. -r tag Compare with revision tag. Zero, one or two -r options can be present. With no -r option, the working file will be compared with the revision it was based on. With one -r, that revision will be compared to your current working file. With two -r options those two revisions will be compared (and your working file will not affect the outcome in any way). One or both -r options can be replaced by a -D date option, described above. The following options specify the format of the output. They have the same meaning as in GNU diff. Most options have two equivalent names, one of which is a single letter preceded by -, and the other of which is a long name preceded by --. -lines Show lines (an integer) lines of context. This option does not spec- ify an output format by itself; it has no effect unless it is com- bined with -c or -u. This option is obsolete. For proper operation, patch typically needs at least two lines of context. -a Treat all files as text and compare them line-by-line, even if they do not seem to be text. -b Ignore trailing white space and consider all other sequences of one or more white space characters to be equivalent. -B Ignore changes that just insert or delete blank lines. --binary Read and write data in binary mode. --brief Report only whether the files differ, not the details of the differ- ences. -c Use the context output format. -C lines --context[=lines] Use the context output format, showing lines (an integer) lines of context, or three if lines is not given. For proper operation, patch typically needs at least two lines of context. --changed-group-format=format Use format to output a line group containing differing lines from both files in if-then-else format. see node Line group formats' in the CVS manual. -d Change the algorithm to perhaps find a smaller set of changes. This makes diff slower (sometimes much slower). -e --ed Make output that is a valid ed script. --expand-tabs Expand tabs to spaces in the output, to preserve the alignment of tabs in the input files. -f Make output that looks vaguely like an ed script but has changes in the order they appear in the file. -F regexp In context and unified format, for each hunk of differences, show some of the last preceding line that matches regexp. --forward-ed Make output that looks vaguely like an ed script but has changes in the order they appear in the file. -H Use heuristics to speed handling of large files that have numerous scattered small changes. --horizon-lines=lines Do not discard the last lines lines of the common prefix and the first lines lines of the common suffix. -i Ignore changes in case; consider upper- and lower-case letters equiv- alent. -I regexp Ignore changes that just insert or delete lines that match regexp. --ifdef=name Make merged if-then-else output using name. --ignore-all-space Ignore white space when comparing lines. --ignore-blank-lines Ignore changes that just insert or delete blank lines. --ignore-case Ignore changes in case; consider upper- and lower-case to be the same. --ignore-matching-lines=regexp Ignore changes that just insert or delete lines that match regexp. --ignore-space-change Ignore trailing white space and consider all other sequences of one or more white space characters to be equivalent. --initial-tab Output a tab rather than a space before the text of a line in normal or context format. This causes the alignment of tabs in the line to look normal. -L label Use label instead of the file name in the context format and unified format headers. --label=label Use label instead of the file name in the context format and unified format headers. --left-column Print only the left column of two common lines in side by side for- mat. --line-format=format Use format to output all input lines in if-then-else format. see node Line formats' in the CVS manual. --minimal Change the algorithm to perhaps find a smaller set of changes. This makes diff slower (sometimes much slower). -n Output RCS-format diffs; like -f except that each command specifies the number of lines affected. -N --new-file In directory comparison, if a file is found in only one directory, treat it as present but empty in the other directory. --new-group-format=format Use format to output a group of lines taken from just the second file in if-then-else format. see node Line group formats' in the CVS manual. --new-line-format=format Use format to output a line taken from just the second file in if- then-else format. see node Line formats' in the CVS manual. --old-group-format=format Use format to output a group of lines taken from just the first file in if-then-else format. see node Line group formats' in the CVS manual. --old-line-format=format Use format to output a line taken from just the first file in if- then-else format. see node Line formats' in the CVS manual. -p Show which C function each change is in. --rcs Output RCS-format diffs; like -f except that each command specifies the number of lines affected. --report-identical-files -s Report when two files are the same. --show-c-function Show which C function each change is in. --show-function-line=regexp In context and unified format, for each hunk of differences, show some of the last preceding line that matches regexp. --side-by-side Use the side by side output format. --speed-large-files Use heuristics to speed handling of large files that have numerous scattered small changes. --suppress-common-lines Do not print common lines in side by side format. -t Expand tabs to spaces in the output, to preserve the alignment of tabs in the input files. -T Output a tab rather than a space before the text of a line in normal or context format. This causes the alignment of tabs in the line to look normal. --text Treat all files as text and compare them line-by-line, even if they do not appear to be text. -u Use the unified output format. --unchanged-group-format=format Use format to output a group of common lines taken from both files in if-then-else format. see node Line group formats' in the CVS man- ual. --unchanged-line-format=format Use format to output a line common to both files in if-then-else for- mat. see node Line formats' in the CVS manual. -U lines --unified[=lines] Use the unified output format, showing lines (an integer) lines of context, or three if lines is not given. For proper operation, patch typically needs at least two lines of context. -w Ignore white space when comparing lines. -W columns --width=columns Use an output width of columns in side by side format. -y Use the side by side output format. Line group formats Line group formats let you specify formats suitable for many applica- tions that allow if-then-else input, including programming languages and text formatting languages. A line group format specifies the out- put format for a contiguous group of similar lines. For example, the following command compares the TeX file myfile with the original version from the repository, and outputs a merged file in which old regions are surrounded by \begin{em}-\end{em} lines, and new regions are surrounded by \begin{bf}-\end{bf} lines. cvs diff \ --old-group-format='\begin{em} %<\end{em} ' \ --new-group-format='\begin{bf} %>\end{bf} ' \ myfile The following command is equivalent to the above example, but it is a little more verbose, because it spells out the default line group for- mats. cvs diff \ --old-group-format='\begin{em} %<\end{em} ' \ --new-group-format='\begin{bf} %>\end{bf} ' \ --unchanged-group-format='%=' \ --changed-group-format='\begin{em} %<\end{em} \begin{bf} %>\end{bf} ' \ myfile Here is a more advanced example, which outputs a diff listing with headers containing line numbers in a plain English'' style. cvs diff \ --unchanged-group-format='' \ --old-group-format='-------- %dn line%(n=1?:s) deleted at %df: %<' \ --new-group-format='-------- %dN line%(N=1?:s) added after %de: %>' \ --changed-group-format='-------- %dn line%(n=1?:s) changed at %df: %<-------- to: %>' \ myfile To specify a line group format, use one of the options listed below. You can specify up to four line group formats, one for each kind of line group. You should quote format, because it typically contains shell metacharacters. --old-group-format=format These line groups are hunks containing only lines from the first file. The default old group format is the same as the changed group format if it is specified; otherwise it is a format that outputs the line group as-is. --new-group-format=format These line groups are hunks containing only lines from the second file. The default new group format is same as the changed group for- mat if it is specified; otherwise it is a format that outputs the line group as-is. --changed-group-format=format These line groups are hunks containing lines from both files. The default changed group format is the concatenation of the old and new group formats. --unchanged-group-format=format These line groups contain lines common to both files. The default unchanged group format is a format that outputs the line group as-is. In a line group format, ordinary characters represent themselves; conversion specifications start with % and have one of the following forms. %< stands for the lines from the first file, including the trailing new- line. Each line is formatted according to the old line format (see node Line formats' in the CVS manual). %> stands for the lines from the second file, including the trailing newline. Each line is formatted according to the new line format. %= stands for the lines common to both files, including the trailing newline. Each line is formatted according to the unchanged line for- mat. %% stands for %. %c'C' where C is a single character, stands for C. C may not be a back- slash or an apostrophe. For example, %c':' stands for a colon, even inside the then-part of an if-then-else format, which a colon would normally terminate. %c'\O' where O is a string of 1, 2, or 3 octal digits, stands for the char- acter with octal code O. For example, %c'\0' stands for a null char- acter. Fn where F is a printf conversion specification and n is one of the fol- lowing letters, stands for n's value formatted with F. e The line number of the line just before the group in the old file. f The line number of the first line in the group in the old file; equals e + 1. l The line number of the last line in the group in the old file. m The line number of the line just after the group in the old file; equals l + 1. n The number of lines in the group in the old file; equals l - f + 1. E, F, L, M, N Likewise, for lines in the new file. The printf conversion specification can be %d, %o, %x, or %X, spec- ifying decimal, octal, lower case hexadecimal, or upper case hexa- decimal output respectively. After the % the following options can appear in sequence: a - specifying left-justification; an integer specifying the minimum field width; and a period followed by an optional integer specifying the minimum number of digits. For example, %5dN prints the number of new lines in the group in a field of width 5 characters, using the printf format "%5d". (A=B?T:E) If A equals B then T else E. A and B are each either a decimal con- stant or a single letter interpreted as above. This format spec is equivalent to T if A's value equals B's; otherwise it is equivalent to E. For example, %(N=0?no:%dN) line%(N=1?:s) is equivalent to no lines if N (the number of lines in the group in the new file) is 0, to 1 line if N is 1, and to %dN lines otherwise. Line formats Line formats control how each line taken from an input file is output as part of a line group in if-then-else format. For example, the following command outputs text with a one-column change indicator to the left of the text. The first column of output is - for deleted lines, | for added lines, and a space for unchanged lines. The formats contain newline characters where newlines are desired on output. cvs diff \ --old-line-format='-%l ' \ --new-line-format='|%l ' \ --unchanged-line-format=' %l ' \ myfile To specify a line format, use one of the following options. You should quote format, since it often contains shell metacharacters. --old-line-format=format formats lines just from the first file. --new-line-format=format formats lines just from the second file. --unchanged-line-format=format formats lines common to both files. --line-format=format formats all lines; in effect, it sets all three above options simul- taneously. In a line format, ordinary characters represent themselves; conver- sion specifications start with % and have one of the following forms. %l stands for the contents of the line, not counting its trailing new- line (if any). This format ignores whether the line is incomplete. %L stands for the contents of the line, including its trailing newline (if any). If a line is incomplete, this format preserves its incom- pleteness. %% stands for %. %c'C' where C is a single character, stands for C. C may not be a back- slash or an apostrophe. For example, %c':' stands for a colon. %c'\O' where O is a string of 1, 2, or 3 octal digits, stands for the char- acter with octal code O. For example, %c'\0' stands for a null char- acter. Fn where F is a printf conversion specification, stands for the line number formatted with F. For example, %.5dn prints the line number using the printf format "%.5d". see node Line group formats' in the CVS manual, for more about printf conversion specifications. The default line format is %l followed by a newline character. If the input contains tab characters and it is important that they line up on output, you should ensure that %l or %L in a line format is just after a tab stop (e.g. by preceding %l or %L with a tab char- acter), or you should use the -t or --expand-tabs option. Taken together, the line and line group formats let you specify many different formats. For example, the following command uses a format similar to diff's normal format. You can tailor this command to get fine control over diff's output. cvs diff \ --old-line-format='< %l ' \ --new-line-format='> %l ' \ --old-group-format='%df%(f=l?:,%dl)d%dE %<' \ --new-group-format='%dea%dF%(F=L?:,%dL) %>' \ --changed-group-format='%df%(f=l?:,%dl)c%dF%(F=L?:,%dL) %<-- %>' \ --unchanged-group-format='' \ myfile diff examples The following line produces a Unidiff (-u flag) between revision 1.14 and 1.19 of backend.c. Due to the -kk flag no keywords are substi- tuted, so differences that only depend on keyword substitution are ignored. cvs diff -kk -u -r 1.14 -r 1.19 backend.c

Suppose the experimental branch EXPR1 was  based  on  a  set  of  files
tagged  RELEASE_1_0.  To see what has happened on that branch, the fol-
lowing can be used:

$cvs diff -r RELEASE_1_0 -r EXPR1 A command like this can be used to produce a context diff between two releases:$ cvs diff -c -r RELEASE_1_0 -r RELEASE_1_1 > diffs

If  you  are  maintaining ChangeLogs, a command like the following just
All  local  modifications  that  have  not  yet  been committed will be
printed.

$cvs diff -u | less export Export sources from CVS, similar to checkout o Synopsis: export [-flNnR] [-r rev|-D date] [-k subst] [-d dir] mod- ule... o Requires: repository. o Changes: current directory. This command is a variant of checkout; use it when you want a copy of the source for module without the cvs administrative directories. For example, you might use export to prepare source for shipment off- site. This command requires that you specify a date or tag (with -D or -r), so that you can count on reproducing the source you ship to others (and thus it always prunes empty directories). One often would like to use -kv with cvs export. This causes any keywords to be expanded such that an import done at some other site will not lose the keyword revision information. But be aware that doesn't handle an export containing binary files correctly. Also be aware that after having used -kv, one can no longer use the ident command (which is part of the rcs suite--see ident(1)) which looks for keyword strings. If you want to be able to use ident you must not use -kv. export options These standard options are supported by export (see node Common options' in the CVS manual, for a complete description of them): -D date Use the most recent revision no later than date. -f If no matching revision is found, retrieve the most recent revision (instead of ignoring the file). -l Local; run only in current working directory. -n Do not run any checkout program. -R Export directories recursively. This is on by default. -r tag Use revision tag. In addition, these options (that are common to checkout and export) are also supported: -d dir Create a directory called dir for the working files, instead of using the module name. see node checkout options' in the CVS manual, for complete details on how cvs handles this flag. -k subst Set keyword expansion mode (see node Substitution modes' in the CVS manual). -N Only useful together with -d dir. see node checkout options' in the CVS manual, for complete details on how cvs handles this flag. history Show status of files and users o Synopsis: history [-report] [-flags] [-options args] [files...] o Requires: the file$CVSROOT/CVSROOT/history

o Changes: nothing.

cvs can keep a history file that tracks each  use  of  the  checkout,
commit,  rtag,  update, and release commands.  You can use history to
display this information in various formats.

Logging must be enabled by creating  the  file  $CVSROOT/CVSROOT/his- tory. history uses -f, -l, -n, and -p in ways that conflict with the normal use inside cvs (see node Common options' in the CVS manual). history options Several options (shown above as -report) control what kind of report is generated: -c Report on each time commit was used (i.e., each time the repository was modified). -e Everything (all record types). Equivalent to specifying -x with all record types. Of course, -e will also include record types which are added in a future version of cvs; if you are writing a script which can only handle certain record types, you'll want to specify -x. -m module Report on a particular module. (You can meaningfully use -m more than once on the command line.) -o Report on checked-out modules. This is the default report type. -T Report on all tags. -x type Extract a particular set of record types type from the cvs history. The types are indicated by single letters, which you may specify in combination. Certain commands have a single record type: F release O checkout E export T rtag One of five record types may result from an update: C A merge was necessary but collisions were detected (requiring man- ual merging). G A merge was necessary and it succeeded. U A working file was copied from the repository. P A working file was patched to match the repository. W The working copy of a file was deleted during update (because it was gone from the repository). One of three record types results from commit: A A file was added for the first time. M A file was modified. R A file was removed. The options shown as -flags constrain or expand the report without requiring option arguments: -a Show data for all users (the default is to show data only for the user executing history). -l Show last modification only. -w Show only the records for modifications done from the same working directory where history is executing. The options shown as -options args constrain the report based on an argument: -b str Show data back to a record containing the string str in either the module name, the file name, or the repository path. -D date Show data since date. This is slightly different from the normal use of -D date, which selects the newest revision older than date. -f file Show data for a particular file (you can specify several -f options on the same command line). This is equivalent to specifying the file on the command line. -n module Show data for a particular module (you can specify several -n options on the same command line). -p repository Show data for a particular source repository (you can specify sev- eral -p options on the same command line). -r rev Show records referring to revisions since the revision or tag named rev appears in individual rcs files. Each rcs file is searched for the revision or tag. -t tag Show records since tag tag was last added to the history file. This differs from the -r flag above in that it reads only the history file, not the rcs files, and is much faster. -u name Show records for user name. -z timezone Show times in the selected records using the specified time zone instead of UTC. import Import sources into CVS, using vendor branches o Synopsis: import [-options] repository vendortag releasetag... o Requires: Repository, source distribution directory. o Changes: repository. Use import to incorporate an entire source distribution from an out- side source (e.g., a source vendor) into your source repository directory. You can use this command both for initial creation of a repository, and for wholesale updates to the module from the outside source. see node Tracking sources' in the CVS manual, for a discus- sion on this subject. The repository argument gives a directory name (or a path to a direc- tory) under the cvs root directory for repositories; if the directory did not exist, import creates it. When you use import for updates to source that has been modified in your source repository (since a prior import), it will notify you of any files that conflict in the two branches of development; use checkout -j to reconcile the differences, as import instructs you to do. If cvs decides a file should be ignored (see node cvsignore' in the CVS manual), it does not import it and prints I followed by the filename (see node import output' in the CVS manual, for a complete description of the output). If the file$CVSROOT/CVSROOT/cvswrappers exists, any file whose names
match the specifications in that file will be treated as packages and
the  appropriate  filtering  will  be performed on the file/directory
before being imported.  see node Wrappers' in the CVS manual.

The outside source is saved  in  a  first-level  branch,  by  default
1.1.1.   Updates  are  leaves of this branch; for example, files from
the first imported collection of source  will  be  revision  1.1.1.1,
then  files  from the first imported update will be revision 1.1.1.2,
and so on.

At least three arguments are required.  repository is needed to iden-
tify  the  collection  of  source.  vendortag is a tag for the entire
branch (e.g., for  1.1.1).   You  must  also  specify  at  least  one
releasetag  to uniquely identify the files at the leaves created each
time you execute import.  The releasetag should be  new,  not  previ-
ously  existing  in  the  repository  file, and uniquely identify the
imported release,

Note that import does not change the directory in  which  you  invoke
it.   In particular, it does not set up that directory as a cvs work-
ing directory; if you want to work with the sources import them first
and then check them out into a different directory (see node Getting
the source' in the CVS manual).

import options
This standard option is supported by import (see node Common  options'
in the CVS manual, for a complete description):

-m message

There are the following additional special options.

-b branch

See see node Multiple vendor branches' in the CVS manual.

-k subst

Indicate the keyword expansion mode desired.  This setting will apply
to all files created during the import, but not  to  any  files  that
previously  existed  in  the  repository.  See see node Substitution
modes' in the CVS manual, for a list of valid -k settings.

-I name

Specify file names that should be ignored during import.  You can use
this  option  repeatedly.   To  avoid ignoring any files at all (even
those ignored by default), specify -I !'.

name can be a file name pattern of the same type that you can specify
in the .cvsignore file.  see node cvsignore' in the CVS manual.

-W spec

Specify  file  names  that should be filtered during import.  You can
use this option repeatedly.

spec can be a file name pattern of the same type that you can specify
in the .cvswrappers file. see node Wrappers' in the CVS manual.

import output
import  keeps  you informed of its progress by printing a line for each
file, preceded by one character indicating the status of the file:

U file

The file already exists in the repository and has  not  been  locally
modified; a new revision has been created (if necessary).

N file

The file is a new file which has been added to the repository.

C file

The  file already exists in the repository but has been locally modi-
fied; you will have to merge the changes.

I file

The file is being ignored (see node cvsignore' in the CVS manual).

L file

The file is a symbolic link; cvs import ignores symbolic links.  Peo-
ple periodically suggest that this behavior should be changed, but if
there is a consensus on what it should be changed to, it doesn't seem
to  be apparent.  (Various options in the modules file can be used to
recreate symbolic links on checkout, update, etc.; see node modules'
in the CVS manual.)

import examples
See  see  node Tracking sources' in the CVS manual, and see node From
files' in the CVS manual.

log
o Synopsis: log [options] [files...]

o Requires: repository, working directory.

o Changes: nothing.

Display log information for files.  log used to call the rcs  utility
rlog.   Although  this is no longer true in the current sources, this
history determines the format of the output and  the  options,  which
are not quite in the style of the other cvs commands.

The  output  includes the location of the rcs file, the head revision
(the latest revision on the trunk), all  symbolic  names  (tags)  and
some  other  things.   For  each  revision,  the revision number, the
author, the number of lines added/deleted and  the  log  message  are
printed.   All  times  are  displayed  in  Coordinated Universal Time
(UTC).  (Other parts of cvs print times in the local timezone).

log uses -R in a way that conflicts with the normal  use  inside  cvs
(see node Common options' in the CVS manual).

log options
By  default,  log  prints all information that is available.  All other
options restrict the output.  Note that the revision selection  options
(-d,  -r,  -s,  and  -w)  have no effect, other than possibly causing a
search for files in Attic directories, when used  in  conjunction  with
the options that restrict the output to only log header fields (-b, -h,
-R, and -t) unless the -S option is also specified.

-b

Print information about the revisions on the default branch, normally
the highest branch on the trunk.

-d dates

Print  information  about  revisions  with a checkin date/time in the
range given by the semicolon-separated list of dates.  The date  for-
mats  accepted  are those accepted by the -D option to many other cvs
commands (see node Common options' in the CVS manual).  Dates can be
combined into ranges as follows:

d1<d2

d2>d1

Select the revisions that were deposited between d1 and d2.

<d

d>

Select all revisions dated d or earlier.

d<

>d

Select all revisions dated d or later.

d

Select the single, latest revision dated d or earlier.

The > or < characters may be followed by = to indicate an inclusive
range rather than an exclusive one.

Note that the separator is a semicolon (;).

-h

Print only the name of the rcs file, name of the file in the  working
directory,  head, default branch, access list, locks, symbolic names,
and suffix.

-l

Local; run only in current working directory.   (Default  is  to  run
recursively).

-N

Do not print the list of tags for this file.  This option can be very
useful when your site uses a lot of tags, so rather  than  "more"'ing
without tags at all.

-R

Print only the name of the rcs file.

-rrevisions

Print information about revisions given in the  comma-separated  list
revisions  of revisions and ranges.  The following table explains the
available range formats:

rev1:rev2

Revisions rev1 to rev2 (which must be on the same branch).

rev1::rev2

The same, but excluding rev1.

:rev

::rev

Revisions from the beginning of the branch up to and including rev.

rev:

Revisions  starting  with  rev  to the end of the branch containing
rev.

rev::

Revisions starting just after rev to the end of the branch contain-
ing rev.

branch

An argument that is a branch means all revisions on that branch.

branch1:branch2

branch1::branch2

A  range  of  branches  means all revisions on the branches in that
range.

branch.

The latest revision in branch.

A bare -r with no  revisions  means  the  latest  revision  on  the
default  branch, normally the trunk.  There can be no space between
the -r option and its argument.

-S

Suppress the header if no revisions are selected.

-s states

Print information about revisions whose state attributes match one of
the  states  given  in  the  comma-separated list states.  Individual
states may be any text string, though  cvs  commonly  only  uses  two
states, Exp and dead.  See see node admin options' in the CVS manual

-t

Print the same as -h, plus the descriptive text.

omitted, the user's login is assumed.  There can be no space  between
the -w option and its argument.

log  prints  the  intersection  of  the  revisions  selected with the
options -d, -s, and -w, intersected with the union of  the  revisions
selected by -b and -r.

log examples
Contributed examples are gratefully accepted.

rdiff
'patch' format diffs between releases
o rdiff [-flags] [-V vn] [-r t|-D d [-r t2|-D d2]] modules...

o Requires: repository.

o Changes: nothing.

o Synonym: patch

Builds  a  Larry Wall format patch(1) file between two releases, that
can be fed directly into the patch program to bring  an  old  release
up-to-date  with  the  new release.  (This is one of the few cvs com-
mands that operates directly from the repository, and doesn't require
a  prior  checkout.)  The  diff output is sent to the standard output
device.

You can specify (using the standard -r and -D options)  any  combina-
tion  of one or two revisions or dates.  If only one revision or date
is specified, the patch file reflects differences between that  revi-
sion or date and the current head revisions in the rcs file.

Note  that if the software release affected is contained in more than
one directory, then it may be necessary to specify the -p  option  to
the  patch  command  when  patching the old sources, so that patch is
able to find the files that are located in other directories.

rdiff options
These standard  options  are  supported  by  rdiff  (see  node  Common
options' in the CVS manual, for a complete description of them):

-D date

Use the most recent revision no later than date.

-f

If  no  matching revision is found, retrieve the most recent revision

-k kflag

Process keywords according to kflag.  See see node Keyword substitu-
tion' in the CVS manual.

-l

Local; don't descend subdirectories.

-R

Examine directories recursively.  This option is on by default.

-r tag

Use revision tag.

In addition to the above, these options are available:

-c

Use the context diff format.  This is the default format.

-s

Create  a  summary  change  report  instead  of a patch.  The summary
the  releases.   It  is  sent to the standard output device.  This is
useful for finding out, for example, which files have changed between
two dates or revisions.

-t

A  diff  of  the  top  two  revisions  is sent to the standard output
device.  This is most useful for seeing what the  last  change  to  a
file was.

-u

Use the unidiff format for the context diffs.  Remember that old ver-
sions of the patch program can't handle the unidiff format, so if you
plan to post this patch to the net you should probably not use -u.

-V vn

Expand keywords according to the rules current in rcs version vn (the
expansion format changed with rcs version 5).  Note that this  option
is  no longer accepted.  cvs will always expand keywords the way that
rcs version 5 does.

rdiff examples
release  1.2  to  1.4  of the tc compiler.  You have no such patches on
hand, but with cvs that can easily be fixed  with  a  command  such  as
this:

$cvs rdiff -c -r FOO1_2 -r FOO1_4 tc | \$$Mail -s 'The patches you asked for' foo@example.net Suppose you have made release 1.3, and forked a branch called R_1_3fix for bug fixes. R_1_3_1 corresponds to release 1.3.1, which was made some time ago. Now, you want to see how much development has been done on the branch. This command can be used:$ cvs patch -s -r R_1_3_1 -r R_1_3fix module-name
cvs rdiff: Diffing module-name
File ChangeLog,v changed from revision 1.52.2.5 to 1.52.2.6
File foo.c,v changed from revision 1.52.2.3 to 1.52.2.4
File bar.h,v changed from revision 1.29.2.1 to 1.2

release
Indicate that a Module is no longer in use
o release [-d] directories...

o Requires: Working directory.

o Changes: Working directory, history log.

This command is meant to safely cancel the effect  of  cvs  checkout.
Since cvs doesn't lock files, it isn't strictly necessary to use this
command.  You can always simply delete your working directory, if you
like;  but  you  risk  losing changes you may have forgotten, and you
leave no trace in the cvs history file (see node  history  file'  in
the CVS manual) that you've abandoned your checkout.

Use cvs release to avoid these problems.  This command checks that no
uncommitted changes are present; that you are executing it from imme-
diately  above  a  cvs  working  directory;  and  that the repository
recorded for your files is the same as the repository defined in  the
module database.

If  all these conditions are true, cvs release leaves a record of its
in the cvs history log.

release options
The release command supports one command option:

-d

Delete  your  working  copy  of the file if the release succeeds.  If
this flag is not given your files will remain in your working  direc-
tory.

WARNING:   The  release  command  deletes  all  directories and files
recursively.  This has the very serious side-effect that  any  direc-
tory  that  you have created inside your checked-out sources, and not
added to the repository (using the  add  command;  see  node  Adding
files'  in  the  CVS  manual) will be silently deleted--even if it is
non-empty!

release output
Before release releases your sources it will print a  one-line  message
for any file that is not up-to-date.

U file

P file

There exists a newer revision of this file in the repository, and you
have not modified your local copy of the file (U and P mean the  same
thing).

A file

The  file has been added to your private copy of the sources, but has
not yet been committed to the repository.  If you delete your copy of
the sources this file will be lost.

R file

The  file has been removed from your private copy of the sources, but
has not yet been removed from the repository, since you have not  yet
committed the removal.  see node commit' in the CVS manual.

M file

The  file is modified in your working directory.  There might also be
a newer revision inside the repository.

? file

file is in your working directory, but does not  correspond  to  any-
thing  in  the source repository, and is not in the list of files for
cvs to ignore (see the description of the -I  option,  and  see  node
cvsignore'  in the CVS manual).  If you remove your working sources,
this file will be lost.

release examples
Release the tc directory, and delete your local  working  copy  of  the
files.

$cd .. # You must stand immediately above the # sources when you issue cvs release.$ cvs release -d tc
You have [0] altered files in this repository.
Are you sure you want to release (and delete) directory tc': y
\$

update
Bring work tree in sync with repository
o update  [-ACdflPpR] [-I name] [-j rev [-j rev]] [-k kflag] [-r tag|-D
date] [-W spec] files...

o Requires: repository, working directory.

o Changes: working directory.

After you've run checkout to create your private copy of source  from
the  common  repository,  other developers will continue changing the
central source.  From time to time, when it  is  convenient  in  your
development  process, you can use the update command from within your
working directory to reconcile your work with any  revisions  applied
to the source repository since your last checkout or update.

update options
These  standard  options  are  available  with update (see node Common
options' in the CVS manual, for a complete description of them):

-D date

Use the most recent revision no later  than  date.   This  option  is
sticky,  and  implies -P.  See see node Sticky tags' in the CVS man-

-f

Only useful with the -D date or -r tag flags.  If no  matching  revi-
sion is found, retrieve the most recent revision (instead of ignoring
the file).

-k kflag

Process keywords according to kflag.  See see node Keyword substitu-
tion'  in  the  CVS manual.  This option is sticky; future updates of
this file in this working directory will use  the  same  kflag.   The
status command can be viewed to see the sticky options.  See see node
Invoking CVS' in the CVS manual, for more information on the  status
command.

-l

Local;  run  only  in current working directory.  see node Recursive
behavior' in the CVS manual.

-P

Prune empty directories.  See see node Moving  directories'  in  the
CVS manual.

-p

Pipe files to the standard output.

-R

Update directories recursively (default).  see node Recursive behav-
ior' in the CVS manual.

-r rev

Retrieve revision/tag rev.  This option is sticky,  and  implies  -P.
See see node Sticky tags' in the CVS manual, for more information on
sticky tags/dates.

These special options are also available with update.

-A

Reset any sticky tags, dates, or -k options.  Does not  reset  sticky
-k  options on modified files.  See see node Sticky tags' in the CVS

-C

Overwrite locally modified files with clean copies from  the  reposi-
tory (the modified file is saved in .#file.revision, however).

-d

Create  any directories that exist in the repository if they're miss-
ing from the working directory.  Normally, update acts only on direc-
tory.

This is useful for updating directories  that  were  created  in  the
repository since the initial checkout; but it has an unfortunate side
effect.  If you  deliberately  avoided  certain  directories  in  the
repository  when  you  created your working directory (either through
use of a module name or by listing explicitly the files and  directo-
ries you wanted on the command line), then updating with -d will cre-
ate those directories, which may not be what you want.

-I name

Ignore files whose names match name (in your working directory)  dur-
ing  the  update.   You  can specify -I more than once on the command
line to specify several files to ignore.  Use -I ! to avoid  ignoring
any  files at all.  see node cvsignore' in the CVS manual, for other
ways to make cvs ignore some files.

-Wspec

Specify file names that should be filtered during  update.   You  can
use this option repeatedly.

spec can be a file name pattern of the same type that you can specify
in the .cvswrappers file. see node Wrappers' in the CVS manual.

-jrevision

With two -j options, merge changes from the revision  specified  with
the  first  -j  option  to  the  revision specified with the second j
option, into the working directory.

With one -j option, merge changes from the ancestor revision  to  the
revision  specified  with  the -j option, into the working directory.
The ancestor revision is the common ancestor of  the  revision  which
the  working directory is based on, and the revision specified in the
-j option.

Note that using a single -j tagname option rather than -j  branchname
to merge changes from a branch will often not remove files which were
removed on the branch.  see node Merging adds and removals'  in  the
CVS manual, for more.

In  addition,  each -j option can contain an optional date specifica-
tion which, when used with branches, can limit the chosen revision to
one  within a specific date.  An optional date is specified by adding
a colon (:) to the tag: -jSymbolic_Tag:Date_Specifier.

see node Branching and merging' in the CVS manual.

update output
update and checkout keep you informed of their progress by  printing  a
line  for each file, preceded by one character indicating the status of
the file:

U file

The file was brought up to date with respect to the repository.  This
is  done  for  any file that exists in the repository but not in your
working directory, and for files that you haven't changed but are not

P file

Like  U,  but the cvs server sends a patch instead of an entire file.
This accomplishes the same thing as U using less bandwidth.

A file

The file has been added to your private copy of the sources, and will
be  added  to  the source repository when you run commit on the file.
This is a reminder to you that the file needs to be committed.

R file

The file has been removed from your private copy of the sources,  and
will be removed from the source repository when you run commit on the
file.  This is a reminder to you that the file needs to be committed.

M file

The file is modified in  your  working  directory.

M can indicate one of two states for a file you're working on: either
there were no modifications to the same file in  the  repository,  so
that  your  file  remains as you last saw it; or there were modifica-
tions in the repository as well as in your copy, but they were merged
successfully, without conflict, in your working directory.

cvs  will  print  some  messages if it merges your work, and a backup
copy of your working file (as it looked before you ran  update)  will
be made.  The exact name of that file is printed while update runs.

C file

A  conflict  was  detected while trying to merge your changes to file
with changes from the source repository.   file  (the  copy  in  your
working  directory)  is now the result of attempting to merge the two
revisions; an unmodified copy of your file is also  in  your  working
directory,  with the name .#file.revision where revision is the revi-
sion that your modified file started from.  Resolve the  conflict  as
described  in  see node Conflicts example' in the CVS manual.  (Note
that some systems automatically purge files that  begin  with  .#  if
they  have not been accessed for a few days.  If you intend to keep a
copy of your original file, it is a very good  idea  to  rename  it.)
Under vms, the file name starts with __ rather than .#.

? file

file  is  in  your working directory, but does not correspond to any-
thing in the source repository, and is not in the list of  files  for
cvs  to  ignore  (see  the description of the -I option, and see node
cvsignore' in the CVS manual).

AUTHORS
Dick Grune
Original author of  the  cvs  shell  script  version  posted  to
comp.sources.unix  in  the  volume6  release  of December, 1986.
Credited with much of the cvs conflict resolution algorithms.

Brian Berliner
Coder and designer of the cvs program  itself  in  April,  1989,
based on the original work done by Dick.

Jeff Polk
Helped Brian with the design of the cvs module and vendor branch
support and author of the checkin(1) shell script (the  ancestor
of cvs import).

Larry Jones, Derek R. Price, and Mark D. Baushke
Have helped maintain cvs for many years.

And many others too numerous to mention here.

The most comprehensive manual for CVS is Version Management with CVS by
Per Cederqvist et al.  Depending on your system, you may be able to get
it  with the info CVS command or it may be available as cvs.pdf (Porta-
ble  Document  Format),  cvs.ps  (PostScript),   cvs.texinfo   (Texinfo
source), or cvs.html.

CVS, development of CVS, and more, see:

http://cvs.nongnu.org

ci(1), co(1), cvs(5), cvsbug(8), diff(1), grep(1),  patch(1),  rcs(1),  rcsd-
iff(1), rcsmerge(1), rlog(1).

CVS(1)


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