ident

IDENT(1)                    General Commands Manual                   IDENT(1)

NAME
       ident - identify RCS keyword strings in files

SYNOPSIS
       ident [ -q ] [ -V ] [ file ... ]

DESCRIPTION
       ident searches for all instances of the pattern $keyword: text $ in the
       named files or, if no files are named, the standard input.

       These patterns are normally inserted automatically by the  RCS  command
       co(1), but can also be inserted manually.  The option -q suppresses the
       warning given if there are no patterns in a file.  The option -V prints
       RCS's version number.

       ident works on text files as well as object files and dumps.  For exam-
       ple, if the C program in f.c contains

              #include <stdio.h>
              static char const rcsid[] =
                "$Id: f.c,v 5.4 1993/11/09 17:40:15 eggert Exp $";
              int main() { return printf("%s\n", rcsid) == EOF; }

       and f.c is compiled into f.o, then the command

              ident  f.c  f.o

       will output

              f.c:
                  $Id: f.c,v 5.4 1993/11/09 17:40:15 eggert Exp $
              f.o:
                  $Id: f.c,v 5.4 1993/11/09 17:40:15 eggert Exp $

       If a C program defines a string like rcsid above but does not  use  it,
       lint(1)  may  complain,  and  some  C  compilers will optimize away the
       string.  The most reliable solution is to have the program use the  rc-
       sid string, as shown in the example above.

       ident finds all instances of the $keyword: text $ pattern, even if key-
       word is not actually an RCS-supported keyword.  This gives you informa-
       tion about nonstandard keywords like $XConsortium$.

       The pattern normally requires a colon and a space immediately after the
       keyword and a space immediately before the terminating $, but for  Sub-
       version  1.2  (and  later) compatibility, ident will also recognize the
       pattern $keyword:: text $ (i.e., two colons and a space) and  the  pat-
       tern  $keyword:: text #$  (likewise, with a hash before the terminating
       $).  These are the fixed-width keyword syntax.  To summarize, the three
       recognized patterns are:

              $keyword: text $
              $keyword:: text $
              $keyword:: text #$

KEYWORDS
       Here  is the list of keywords currently maintained by co(1).  All times
       are given in Coordinated Universal Time (UTC, sometimes called GMT)  by
       default,  but  if  the  files were checked out with co's -zzone option,
       times are given with a numeric time zone indication appended.

       $Author$
              The login name of the user who checked in the revision.

       $Date$ The date and time the revision was checked in.

       $Header$
              A standard header containing the full RCS file name,  the  revi-
              sion  number,  the date and time, the author, the state, and the
              locker (if locked).

       $Id$   Same as $Header$, except that the RCS file name is  without  di-
              rectory components.

       $Locker$
              The login name of the user who locked the revision (empty if not
              locked).

       $Log$  The log message supplied during checkin.  For ident's  purposes,
              this is equivalent to $RCSfile$.

       $Name$ The symbolic name used to check out the revision, if any.

       $RCSfile$
              The RCS file name without directory components.

       $Revision$
              The revision number assigned to the revision.

       $Source$
              The full RCS file name.

       $State$
              The  state assigned to the revision with the -s option of rcs(1)
              or ci(1).

       co(1) represents the following characters in keyword values  by  escape
       sequences to keep keyword strings well-formed.

              char     escape sequence
              tab      \t
              newline  \n
              space    \040
              $        \044
              \        \\

IDENTIFICATION
       Author: Walter F. Tichy.
       Manual Page Revision: 5.9.4; Release Date: 2019-12-31.
       Copyright (C) 2010-2015 Thien-Thi Nguyen.
       Copyright (C) 1990, 1992, 1993 Paul Eggert.
       Copyright (C) 1982, 1988, 1989 Walter F. Tichy.

SEE ALSO
       ci(1), co(1), rcs(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.

       The full documentation for RCS is maintained as a Texinfo  manual.   If
       the  info(1)  and RCS programs are properly installed at your site, the
       command

              info rcs

       should give you access to the complete manual.  Additionally,  the  RCS
       homepage:

              http://www.gnu.org/software/rcs/

       has news and links to the latest release, development site, etc.

GNU RCS 5.9.4                     2019-12-31                          IDENT(1)