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RCS(1)											   RCS(1)

NAME
       rcs - change RCS file attributes

SYNOPSIS
       rcs options file ...

DESCRIPTION
       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  con-
       trol  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  superuser,
       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 numbers use the syntax described in ci(1).

OPTIONS
       -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
	      message.

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

       -Aoldfile
	      Append the access list of oldfile to the access list of the RCS file.

       -e[logins]
	      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.

       -b[rev]
	      Set  the	default branch to rev.	If rev is omitted, the default branch is reset to
	      the (dynamically) highest branch on the trunk.

       -cstring
	      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 preceding $Log$ line's pre-
	      fix 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.

       -ksubst
	      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.

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

       -u[rev]
	      Unlock the revision with number rev.  If a branch is given, unlock the latest revi-
	      sion 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 commen-
	      tary 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 administra-
	      tor, but it is normally strict.

       -mrev:msg
	      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.

       -nname[:[rev]]
	      Associate  the symbolic name name with the branch or revision rev.  Delete the sym-
	      bolic 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 revision of all the named
	      RCS files; this contrasts with rcs -nname:$ RCS/* which associates  name	with  the
	      revision numbers extracted from keyword strings in the corresponding working files.

       -Nname[:[rev]]
	      Act like -n, except override any previous assignment of name.

       -orange
	      deletes  ("outdates") the revisions given by range.  A range consisting 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  con-
	      taining 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.

       -sstate[:rev]
	      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.

       -t[file]
	      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 containing . by itself.  Prompt for the text if interaction is  possible;  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, deleting 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  sup-
	      press  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 file.

       -V     Print RCS's version number.

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

       -xsuffixes
	      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.

COMPATIBILITY
       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  ver-
       sion 4 or earlier.

       Use rcs -Vn to make an RCS file acceptable to RCS version n by discarding 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.

FILES
       rcs  accesses  files  much  as  ci(1) does, except that it uses the effective 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.

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

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

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

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

BUGS
       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 semaphore 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											   RCS(1)
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