# IDENT(1) - man - phpman [IDENT(1)](https://www.chedong.com/phpMan.php/man/IDENT/1/markdown) General Commands Manual [IDENT(1)](https://www.chedong.com/phpMan.php/man/IDENT/1/markdown) ## 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)](https://www.chedong.com/phpMan.php/man/co/1/markdown), 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 program in **f.c** contains **#include** **** **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)](https://www.chedong.com/phpMan.php/man/lint/1/markdown) may complain, 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 **$XConsor**‐‐ **tium$**. The pattern normally requires a colon and a space immediately after the keyword and a space immediately before the terminating **$**, but for Subversion 1.2 (and later) compatibility, **ident** will also recognize the pattern **$**_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)](https://www.chedong.com/phpMan.php/man/co/1/markdown). All times are given in Coordi‐ nated Universal Time (UTC, sometimes called GMT) by default, but if the files were checked out with **co**'s **-z**_zone_ 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 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. ### $Locker$ 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)](https://www.chedong.com/phpMan.php/man/rcs/1/markdown) or [**ci**(1)](https://www.chedong.com/phpMan.php/man/ci/1/markdown). [**co**(1)](https://www.chedong.com/phpMan.php/man/co/1/markdown) represents the following characters in keyword values by escape sequences to keep key‐ word strings well-formed. _char_ _escape_ _sequence_ tab **\t** newline **\n** space **\040** **$** **\044** **\** **\\** ## IDENTIFICATION Author: Walter F. Tichy. Manual Page Revision: 5.10.1; Release Date: 2022-02-19. Copyright © 2010-2022 Thien-Thi Nguyen. Copyright © 1990, 1992, 1993 Paul Eggert. Copyright © 1982, 1988, 1989 Walter F. Tichy. ## SEE ALSO [**ci**(1)](https://www.chedong.com/phpMan.php/man/ci/1/markdown), [**co**(1)](https://www.chedong.com/phpMan.php/man/co/1/markdown), [**rcs**(1)](https://www.chedong.com/phpMan.php/man/rcs/1/markdown), [**rcsdiff**(1)](https://www.chedong.com/phpMan.php/man/rcsdiff/1/markdown), [**rcsmerge**(1)](https://www.chedong.com/phpMan.php/man/rcsmerge/1/markdown), [**rlog**(1)](https://www.chedong.com/phpMan.php/man/rlog/1/markdown), [**rcsfile**(5)](https://www.chedong.com/phpMan.php/man/rcsfile/5/markdown). 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)](https://www.chedong.com/phpMan.php/man/info/1/markdown) 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 5.10.1 2022-02-19 [IDENT(1)](https://www.chedong.com/phpMan.php/man/IDENT/1/markdown)