man rcs Command

Man page for apt-get rcs Command

Man Page for rcs in Linux

Ubuntu Man Command : man rcs

Man Rcs  Command

This tutorial shows the man page for man rcs in linux.

Open terminal with 'su' access and type the command as shown below:
man rcs

Result of the Command Execution shown below:

RCS(1)                                                                  RCS(1)

rcs change RCS file attributes

rcs options file ...

rcs creates new RCS files or changes attributes of existing ones. An
RCS file contains multiple revisions of text, an access list, a change
log, descriptive text, and some control attributes. For rcs to work,
the caller's login name must be on the access list, except if the
access list is empty, the caller is the owner of the file or the supe
ruser, or the i option is present.

Pathnames matching an RCS suffix denote RCS files; all others denote
working files. Names are paired as explained in ci(1). Revision num
bers use the syntax described in ci(1).

i Create and initialize a new RCS file, but do not deposit any
revision. If the RCS file has no path prefix, try to place it
first into the subdirectory ./RCS, and then into the current
directory. If the RCS file already exists, print an error mes

Append the login names appearing in the comma separated list
logins to the access list of the RCS file.

Append the access list of oldfile to the access list of the RCS

Erase the login names appearing in the comma separated list
logins from the access list of the RCS file. If logins is omit
ted, erase the entire access list.

Set the default branch to rev. If rev is omitted, the default
branch is reset to the (dynamically) highest branch on the

Set the comment leader to string. An initial ci, or an rcs i
without c, guesses the comment leader from the suffix of the
working filename.

This option is obsolescent, since RCS normally uses the preced
ing $Log$ line's prefix when inserting log lines during checkout
(see co(1)). However, older versions of RCS use the comment
leader instead of the $Log$ line's prefix, so if you plan to
access a file with both old and new versions of RCS, make sure
its comment leader matches its $Log$ line prefix.

Set the default keyword substitution to subst. The effect of
keyword substitution is described in co(1). Giving an explicit
k option to co, rcsdiff, and rcsmerge overrides this default.
Beware rcs kv, because kv is incompatible with co l. Use
rcs kkv to restore the normal default keyword substitution.

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. Locking prevents over
lapping changes. If someone else already holds the lock, the
lock is broken as with rcs u (see below).

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 can unlock it. Somebody else unlocking a
revision breaks the lock. This causes a mail message to be sent
to the original locker. The message contains a commentary
solicited from the breaker. The commentary is terminated by
end of file or by a line containing . by itself.

L Set locking to strict. Strict locking means that the owner of
an RCS file is not exempt from locking for checkin. This option
should be used for files that are shared.

U Set locking to non strict. Non strict locking means that the
owner of a file need not lock a revision for checkin. This
option should not be used for files that are shared. Whether
default locking is strict is determined by your system adminis
trator, but it is normally strict.

Replace revision rev's log message with msg.

M Do not send mail when breaking somebody else's lock. This
option is not meant for casual use; it is meant for programs
that warn users by other means, and invoke rcs u only as a low
level lock breaking operation.

Associate the symbolic name name with the branch or revision
rev. 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 example,
rcs nname: RCS/* associates name with the current latest revi
sion of all the named RCS files; this contrasts with
rcs nname:$ RCS/* which associates name with the revision num
bers extracted from keyword strings in the corresponding working

Act like n, except override any previous assignment of name.

deletes ("outdates") the revisions given by range. A range con
sisting of a single revision number means that revision. A
range consisting of a branch number means the latest revision on
that branch. A range of the form rev1:rev2 means revisions rev1
to rev2 on the same branch, :rev means from the beginning of the
branch containing rev up to and including rev, and rev: means
from revision rev to the end of the branch containing rev. None
of the outdated revisions can have branches or locks.

q Run quietly; do not print diagnostics.

I Run interactively, even if the standard input is not a terminal.

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, ci(1) sets the state of a revision
to Exp.

Write descriptive text from the contents of the named file into
the RCS file, deleting the existing text. The file pathname
cannot begin with . If file is omitted, obtain the text from
standard input, terminated by end of file or by a line contain
ing . by itself. Prompt for the text if interaction is possi
ble; see I. With i, descriptive text is obtained even if t
is not given.

t string
Write descriptive text from the string into the RCS file, delet
ing the existing text.

T Preserve the modification time on the RCS file unless a revision
is removed. This option can suppress extensive recompilation
caused by a make(1) dependency of some copy of the working file
on the RCS file. Use this option with care; it can suppress
recompilation even when it is needed, i.e. when a change to the
RCS file would mean a change to keyword strings in the working

V Print RCS's version number.

Vn Emulate RCS version n. See co(1) for details.

Use suffixes to characterize RCS files. See ci(1) for details.

zzone Use zone as the default time zone. This option has no effect;
it is present for compatibility with other RCS commands.

At least one explicit option must be given, to ensure compatibility
with future planned extensions to the rcs command.

The brev option generates an RCS file that cannot be parsed by RCS
version 3 or earlier.

The ksubst options (except kkv) generate an RCS file that cannot be
parsed by RCS version 4 or earlier.

Use rcs Vn to make an RCS file acceptable to RCS version n by discard
ing information that would confuse version n.

RCS version 5.5 and earlier does not support the x option, and
requires a ,v suffix on an RCS pathname.

rcs accesses files much as ci(1) does, except that it uses the effec
tive user for all accesses, it does not write the working file or its
directory, and it does not even read the working file unless a revision
number of $ is specified.

options prepended to the argument list, separated by spaces.
See ci(1) for details.

The RCS pathname and the revisions outdated are written to the diagnos
tic output. The exit status is zero if and only if all operations were

Author: Walter F. Tichy.
Manual Page Revision: 5.13; Release Date: 1995/06/05.
Copyright (C) 1982, 1988, 1989 Walter F. Tichy.
Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert.

rcsintro(1), co(1), ci(1), ident(1), rcsclean(1), rcsdiff(1),
rcsmerge(1), rlog(1), rcsfile(5)
Walter F. Tichy, RCS A System for Version Control, Software Practice
& Experience 15, 7 (July 1985), 637 654.

A catastrophe (e.g. a system crash) can cause RCS to leave behind a
semaphore file that causes later invocations of RCS to claim that the
RCS file is in use. To fix this, remove the semaphore file. A sema
phore file's name typically begins with , or ends with _.

The separator for revision ranges in the o option used to be instead
of :, but this leads to confusion when symbolic names contain . For
backwards compatibility rcs o still supports the old separator, but
it warns about this obsolete use.

Symbolic names need not refer to existing revisions or branches. For
example, the o option does not remove symbolic names for the outdated
revisions; you must use n to remove the names.

GNU 1995/06/05 RCS(1)

Related Topics

Apt Get Commands