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Copyright © 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of this documentation provided the copyright notice and this permission notice are preserved on all copies.
Permission is granted to copy and distribute modified versions of this documentation under the conditions for verbatim copying, provided also that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.
Permission is granted to copy and distribute translations of this documentation into another language, under the above conditions for modified versions.
GNU diff was written by Mike Haertel, David Hayes, Richard Stallman, Len Tower, and Paul Eggert. Wayne Davison designed and implemented the unified output format.
The basic algorithm is described in "An O(ND) Difference Algorithm and its Variations" by Eugene W. Myers, in Algorithmica; Vol. 1, No. 2, 1986; pp. 251–266; and in "A File Comparison Program" by Webb Miller and Eugene W. Myers, in Software—Practice and Experience; Vol. 15, No. 11, 1985; pp. 1025–1040.
The algorithm was independently discovered as described in "Algorithms for Approximate String Matching" by E. Ukkonen, in Information and Control; Vol. 64, 1985, pp. 100–118.
GNU diff3 was written by Randy Smith.
GNU sdiff was written by Thomas Lord.
GNU cmp was written by Torbjorn Granlund and David MacKenzie.
patch was written mainly by Larry Wall; the GNU enhancements were written mainly by Wayne Davison and David MacKenzie.
Parts of this manual are adapted from a manual page written by Larry Wall, with his permission.
This documentation has been prepared byCygn ffb us Technical Publications; to contact the Cygnus Solutions Documentation staff, email: doc@cygnus.com.
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