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IDENT(1)                             General Commands Manual                             IDENT(1)

       ident - identify RCS keyword strings in files

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

       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 example, if the  C  pro-
       gram 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

                  $Id: f.c,v 5.4 1993/11/09 17:40:15 eggert Exp $
                  $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 com-
       plain, and some C compilers will optimize away the string.  The most reliable solution  is
       to have the program use the rcsid string, as shown in the example above.

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

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

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

       Here is the list of keywords currently maintained by co(1).  All times are given in  Coor-
       dinated  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

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

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

              A  standard header containing the full RCS file name, the revision 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 directory components.

              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.

              The RCS file name without directory components.

              The revision number assigned to the revision.

              The full RCS file name.

              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
              \        \\

       Author: Walter F. Tichy.
       Manual Page Revision: 5.9.0; Release Date: 2014-06-10.
       Copyright (C) 2010-2013 Thien-Thi Nguyen.
       Copyright (C) 1990, 1992, 1993 Paul Eggert.
       Copyright (C) 1982, 1988, 1989 Walter F. Tichy.

       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:


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

GNU RCS 5.9.0                               2014-06-10                                   IDENT(1)

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