Idutils - Free Software Directory

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A package of language independent tools that indexes program identifiers, literal numbers, or words of human-readable text. Through an "ID database," a binary file containing a list of filenames, a list of tokens, and a simple matrix indicating which tokens appear in which files, text-searching tasks become simpler and faster. The ID utilities handle more than just identifiers; they also treat other kinds of tokens, including numeric constants, and the contents of certain character strings. Database queries can be issued from the command-line, or from within emacs, serving as an augmented tags facility. Programs included are:
mkid: (id-utils)mkid invocation. Creating an ID database.

  • lid: (id-utils)lid invocation. Matching words and patterns.
  • fid: (id-utils)fid invocation. Listing a file's tokens.
  • fnid: (id-utils)fnid invocation. Looking up file names.
  • xtokid: (id-utils)xtokid invocation. Testing mkid scanners.


User manual included

Heckert gnu.small.png This is a GNU package:idutils


Download version 4.6 (stable)
released on 3 February 2012

VCS Checkout



LicenseVerified byVerified onNotes
GPLv3genium6 September 2015

Leaders and contributors

Jim Meyering Contributor
Pedro J. Ruiz Lopez Maintainer

Resources and communication

Audience Resource type URI
Developer VCS Repository Webview
Bug Tracking E-mail

Software prerequisites

This entry (in part or in whole) was last reviewed on 6 September 2015.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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