rcsclean - clean up working files
rcsclean [options] [ file ... ]
rcsclean removes files that are not being worked on. rcsclean -u
  also unlocks and removes files that are being worked on but have not changed.
For each file given, rcsclean compares the working
    file and a revision in the corresponding RCS file. If it finds a difference,
    it does nothing. Otherwise, it first unlocks the revision if the -u
    option is given, and then removes the working file unless the working file
    is writable and the revision is locked. It logs its actions by outputting
    the corresponding rcs -u and rm -f commands on the standard
    output.
Files are paired as explained in ci(1). If no file
    is given, all working files in the current directory are cleaned. Pathnames
    matching an RCS suffix denote RCS files; all others denote working
  files.
The number of the revision to which the working file is compared
    may be attached to any of the options -n, -q, -r, or
    -u. If no revision number is specified, then if the -u option
    is given and the caller has one revision locked, rcsclean uses that
    revision; otherwise rcsclean uses the latest revision on the default
    branch, normally the root.
rcsclean is useful for clean targets in makefiles.
    See also rcsdiff(1), which prints out the differences, and
    ci(1), which normally reverts to the previous revision if a file was
    not changed.
  - -ksubst
- Use subst style keyword substitution when retrieving the revision
      for comparison. See co(1) for details.
- -n[rev]
- Do not actually remove any files or unlock any revisions. Using this
      option will tell you what rcsclean would do without actually doing
      it.
- -q[rev]
- Do not log the actions taken on standard output.
- -r[rev]
- This option has no effect other than specifying the revision for
      comparison.
- -T
- Preserve the modification time on the RCS file even if the RCS file
      changes because a lock is removed. This option can suppress extensive
      recompilation caused by a make(1) dependency of some other 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 the lock removal
      would mean a change to keyword strings in the other working file.
- -u[rev]
- Unlock the revision if it is locked and no difference is found.
- -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 time zone for keyword substitution; see
      co(1) for details.
rcsclean *.c *.h 
removes all working files ending in .c or .h that
    were not changed since their checkout.
rcsclean 
removes all working files in the current directory that were not
    changed since their checkout.
rcsclean accesses files much as ci(1) does.
  - RCSINIT
- options prepended to the argument list, separated by spaces. A backslash
      escapes spaces within an option. The RCSINIT options are prepended
      to the argument lists of most RCS commands. Useful RCSINIT options
      include -q, -V, -x, and -z.
The exit status is zero if and only if all operations were successful. Missing
  working files and RCS files are silently ignored.
Author: Walter F. Tichy.
Manual Page Revision: 1.12; Release Date: 1993/11/03.
Copyright © 1982, 1988, 1989 Walter F. Tichy.
Copyright © 1990, 1991, 1992, 1993 Paul Eggert.
ci(1), co(1), ident(1), rcs(1), rcsdiff(1), rcsintro(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.
At least one file must be given in older Unix versions that do not
  provide the needed directory scanning operations.